Polyisocyanates and Prepolymers.pdf

Polyisocyanates
and Prepolymers

3
Polyisocyanates and Prepolymers
05 Covestro – leading in material solutions

06
Quality supply security – sustainability

08 Polyisocyanates and prepolymers –
grades with shining properties
10 Desmodur® ultra/Bayhydur® ultra

11 Desmodur® N family
HDI trimer
12 Blulogiq®: smart for several
applications

HDI biuret
HDI specialties

15 Aliphatic polyisocyanates
Desmodur®/Desmodur® ultra
16 Desmodur® Z family
IPDI-based crosslinkers
17 Desmodur® eco N/Bayhydur® eco family

PDI-based crosslinker

19 Aliphatic, hydrophilic polyisocyanates

Bayhydur®/Bayhydur® ultra
20 Bayhydur® family
Hydrophilic-modified polyurethane hardener
22 Desmodur® D family
Hydrophilic-modified polyurethane hardener
23 Desmodur® BL family
Thermally activated polyurethane hardener
24 Bayhytherm®/Desmotherm®
Self-crosslinking urethane resins
25 Desmodur® BL/Bayhydur® BL/Baybond® XL
Thermally activated polyurethane hardeners
26 Bayhydur® BL and Baybond® family

Thermally activated polyurethane hardener
and waterborne carbodiimide crosslinker

27 Crelan® family
Powder hardeners

28 Desmocap® family
Blocked TDI prepolymers

30 Desmodur® R family
31 Desmodur® monomers
Aliphatic diisocyanates
32 Desmodur® L family
TDI- and TDI-/HDI-based crosslinkers
33 Desmodur® polymeric MDI products (pMDI)
For coatings and adhesives

34 Desmodur® polymeric MDI products (pMDI)
For coatings and membranes

35 Desmodur® prepolymers
HDI-based/IPDI-based/TDI-based
prepolymers
38 Desmodur® and Desmoseal® M
Prepolymers based on MDI
40 Desmoseal® S family
Silane-terminated polyurethanes
44 Desmodur® monomers
Aromatic diisocyanates
45 Legend
46 Fast-lane access to polyurethane innovations
Contents

5
As the world’s leading manufacturer of aliphatic and
aromatic polyisocyanates, Covestro offers an extensive
range of innovative products and solutions for the
coatings and adhesives industries. As your customers
become more demanding in their expectations for the
quality, durability, workability and sustainability of your
products, we can help you to turn these challenges into
a competitive advantage. That is what drives us to push
the boundaries of what is possible.
The key to creating added value for you, our customers,
as well as for society and the environment is innovation.
At Covestro, we innovate not only to address the key
global challenges of population growth, urbanization,
climate change, digitalization and increasing mobility;
we innovate to have a sustainable business that enables
us to live up to our business purpose of “making the
world a brighter place.” In the final analysis, this comes
down to developing sustainable solutions that take the
entire life cycle of a product into account. We are
increasing our on-site efficiency, e.g., by recycling salt
and water in our production plants. We are expanding
our resource base, e.g., by turning CO2 into a raw
material in the manufacturing of plastics. And we are
developing materials that are more energy-efficient and
save natural resources.
In our Coatings, Adhesives, Specialties (CAS) segment,
we systematically develop and supply aliphatic and
aromatic isocyanates and their derivatives as well as
polyurethane dispersions. Our raw materials are used
for coatings, adhesives, sealants and specialty prod-
ucts, such as elastomers, high-quality films, 3D printing
products, cosmetics, textiles and medical products. The
main application areas are in the automotive, transpor-
tation, infrastructure, construction, wood processing
and furniture industries. In this segment, our innovative
efforts are focusing on enhancing efficiency, improving
quality, boosting sustainability and environmental
aspects such as reducing solvent content.
We are proud of over 80 years of groundbreaking
innovations. But we are not defined by our past. Even
with decades of experience behind us, Covestro
remains a young enterprise. In a corporate world that
can often be dull and uninspiring, we want to act in a
curious, courageous, and colorful way: trying out new
things, questioning established ways, and pushing
boundaries – for your benefit.
Covestro – leading in material solutions

6
What this means for our Coatings, Adhesives and Specialties business
Quality supply security
Our products are of outstanding quality and we offer supply security –
worldwide.
Covestro, the world’s leading manufacturer of aliphatic and aromatic
polyisocyanates, offers an extensive range of raw materials and services
for the coatings and adhesives industry. This allows the very latest
technology to be used extremely effectively for a variety of applications.
Our global setup enables you to increase your competitive advantage.
What we offer:
•
A global network of research development centers where our staff are dedicated to
offering solutions for the coating and adhesive industry.
•
A unique setup and worldwide network of state-of-the-art production sites ensuring
short lead times and supply chain flexibility.
•
Outstanding product quality through fulfilling the requirements of state-of-the-art
quality, environmental and safety (HSEQ) as well as energy management standards;
we are proud of having enjoyed ISO 9001, ISO 14001, ISO 18001 and ISO 50001
certifications for many years.
Covestro is your reliable partner for polyurethane chemistry.
What we do
As a world-leading polymer and material science company,
we inspire innovation and drive growth through profitable products
and technologies that benefit society and reduce the impact on
the environment.
Who does all this?
It’s our people! And the way we work together as one global team
following a set of six elementary principles – value creation, sustain-
ability, innovation, focus on people, safety, and fair play. This is our
formula for success.

7
Solutions to enhance your process efficiency
Nowadays, the quality demands made on industrial processes are very
high. This is equally true of the cost-cutting requirements. However,
both goals can be achieved by increasing process efficiency. At Covestro,
we have a wide range of solutions designed to enhance your process
efficiency. Why not take advantage of our know-how? These solutions will
benefit your bottom line.
Sustainability
Sustainability is at the heart of the Covestro strategy. We inspire inno
va
tion and drive growth through profitable products and technologies that
benefit society and reduce the impact on the environment.
Our coatings, adhesives and specialty products and solutions contribute
to sustainability through:
• Food contact
Any comment on food or drinking water contact for products exclusively
refers to the regulation quoted in the table: please request a Declaration
of Compliance before use. For any such uses which require compliance
with another judicial area or national legislation, the corresponding legal assessment
needs to be performed prior to any application of a product in the field.
• Saving energy – fast and smart
Polyurethane systems represent a benchmark in productivity and process efficiency
in many industries. We strive to further push the limits of efficiency by developing game-
changing new solutions.
•
Reducing waste
We offer solutions such as innovative 1K technologies that enable our value chain partners
to use materials more efficiently and reduce waste.
•
Cutting emissions
Bayhydur® and Desmodur® grades are key enablers for low-emission solutions in the
coatings and adhesives industries – waterborne and high solids/100% solids!
•
Responsible management of natural resources
Highly durable PU-based coatings and adhesives significantly extend the lifetime of
a coated product and thus help to prolong resource use.
•
Closing the loop (circularity)
Through economically viable products made from bio-based raw materials – with no
deterioration in performance – we help our customers and value chain partners to reduce
their carbon footprint and offer solutions that incorporate renewable building blocks.

9
Pioneering polyurethane
chemistry
Ever since Otto Bayer’s discovery of the poly
iso
cyanate-polyaddition process in 1937, Bayer – now
Covestro – has pioneered poly
urethane chemistry.
50 years ago, Bayer – now Covestro – developed
the first applications using polyisocyanates for the
coatings and adhesives sectors. We work closely with
our customers to systematically advance the state
of the art in polyurethane technology. Using market-
oriented research and development, we specifically
adapt our product portfolio to our customers’ increas-
ingly stringent requirements. Together with you, we
want to continue our successful journey along this path.
Wide variety
of applications
Our polyisocyanates comprise a broad range of
products for one- and two-component (1K/2K)
poly
urethane systems used in numerous applications.
Whether as crosslinkers for 2K polyurethane coatings
and adhesives, blocked polyisocyanates for 1K
poly
urethane baking coatings or hydrophilized
polyiso
cyanates as crosslinkers for water-reducible
poly
urethane systems, our products come into play
wherever crosslinking is used to achieve high resis
tances and reliable adhesion under efficient condi-
tions. Our solutions are in use today in a variety of
applications, such as automotive OEMs, automotive
refinishing and coatings for wood, industrial goods
and plastics. They are also used in reactive adhesives,
textile coatings, and anticorrosion coatings.
Customized properties
Gloss, leveling, scratch resistance, hardness and flexibility can be precisely
adjusted by the choice of polyisocyanate and polyol. Chemical resistance,
adhesion, light fastness and weather stability are additional properties that
can be individually adapted to your specific requirements. Moreover,
coatings with easy-to-clean, soft-touch or reflow properties can also be
produced through smart formulations.
Flexibility in
prepolymers
Our product range of prepolymers comprises aromatic and aliphatic
NCO- and silane-terminated products. These prepolymers make a wide
range of properties possible in coatings, adhesives and sealants. The
typical areas of application include wood coatings, corrosion protection,
floor coatings, elastic adhesives in transportation, parquet adhesives,

engineered wood constructions, flex
ible film lamination and sealants.
Prepolymers with a low fraction of non-polymer-bound components open
up formulation options for producing reactive polyurethane adhesive
and sealants that are not subject to labeling requirements.
Grades with shining properties
Polyisocyanates and prepolymers:

10
Safeguard your business by offering an improved industrial hygiene
standard with 0.1% residual monomer content.
Desmodur® ultra / Bayhydur® ultra
Set new standards in industrial hygiene
Technical drop-in solution with improved industrial hygiene standard Improved industrial hygiene standards are important for the entire value chain. Covestro is
committed to continually improving products and setting new standards, especially in the field
of industrial hygiene. The new Ultra Line opens up the potential for further increasing product
safety through a con
tinued reduction of the specified residual monomer content.
With our new Covestro Ultra Line we are introducing a product line with the following
beneficial features:
• Further improves industrial hygiene standards thanks to a residual monomer content of
below 0.1% – in line with the safety measures recommended in the safety data sheets.
• Can be used in the same way as the Desmodur® and Bayhydur® predecessors in your
current formulations so you can continue to focus on your core business.
• Makes easy-to-use 2K PU technology available.
• State-of-the-art and technically equivalent to our existing products.
The performance and composition of the Ultra products have not changed in any way – except for their residual monomer content (r.m.c.) specification.
CONVENTIONAL
2K PU
COVESTRO’S
ULTRA LINE
High-performance isocyanates technology
Improved industrial hygiene standard
No additional efforts to comply with the
proposed isocyanate use restriction*
* Upcoming European Union (EU) legislation

11
Desmodur® N family
Hardeners for high-performance two-component polyurethane coatings
with excellent weatherability and resistance properties. Desmodur® ultra
qualities perform with 0.1% monomer content.
HDI trimer
NCO CONTENT ON
SUPPLY FORM
APPROX. [%]
FUNCTIONALITY
APPROX.
VISCOSITY AT 23°C
APPROX. [mPa · s]
EQUIVALENT
WEIGHT APPROX. COMMENTS
Desmodur® ultra N 3300 100 3,000 21.8 195 3.5
Outstanding weather stability and gloss retention, non-yellowing; for automotive
OEM, automotive refinish, plastics and industrial coatings, structural coatings and
topcoats.
Desmodur® ultra N 3600 100 1,200 23.0 185 3.2
Low-viscosity crosslinker for lightfast 2K PUR coatings (high solids/
waterborne, e.g., in combination with Bayhydur® types) for automotive refinish,
automotive OEM and industrial applications; also for structural coatings and
topcoats. Recommendable for aliphatic cast systems.
Desmodur® N 3800 100 6,000 11.0 380 3.8
For highly elastic coatings with excellent weather resistance; combination with
suitable polyisocyanates allows adjustments of the elasticity using the same
polyol mill base. Especially suitable for plastic coatings.
Desmodur® N 3900 100 730 23.5 180 3.2
Low-viscosity crosslinker for lightfast 2K PUR coatings (high solids/waterborne,
e.g., in combination with Bayhydur® types) for automotive refinish, automotive
OEM, transportation and plastics finishing applications. Recommendable for
aliphatic cast systems.
Desmodur® XP 2675 100 16,000 20.0 210 3.9 100% supply form of Desmodur® N 3790 BA.
Desmodur® ultra N 3689 SN 88.5 in SN 325 20.3 207 3.2 Special supply form of Desmodur® ultra N 3600.
Desmodur® ultra N 3390 BA/SN 90 in BA/SN 550 19.6 215 3.5
Special supply forms of Desmodur® ultra N 3300 for different applications. Other
supply forms also available.
Desmodur® ultra 2822 55 in BA/SN 15 12.0 350 3.5
Desmodur® N 3790 BA 90 in BA 1,800 17.8 235 3.9
High functional crosslinker for fast-drying, weather-stable and non-yellowing
2K PUR coatings for automotive refinish and industrial applications.
Desmodur® blulogiq 3190 90 in BA 650 19.1 214 3.5
Thermolatent crosslinker for solvent-borne 2K PUR systems with standard
reactivity at ambient conditions but acts as a highly catalyzed crosslinker at
elevated temperatures. Baking temperature of 75°C or higher recommended.
Especially for high-gloss spray coatings.
SUPPLY FORM
APPROX. [%]
OCN
NCO
NEW
NEW

12
Blulogiq®:
smart for several applications
From efficiency to low temp – without compromising appearance
Blulogiq® technology:
The unique thermolatent hardener technology inven
ted
by Covestro adresses several needs, urgencies and
unsolved problems of the coatings industry. Blulogiq®
delivers the possibility to incorporate the separation
of levelling as well as curing-on-demand into a 2K PU
system.
Key benefits
•
Boosts process efficiency of OEM plastic and metal
applications.
•
Almost no reaction during leveling – fast crosslinking
at 75°C enables very good appearance.
•
Crosslinking speed at 90°C is comparable to a 140°C
noncatalyzed process.
•
Improved early resistance properties enable better
post-processing like: earlier easier polishing, more
robust handling, less damage during transport.
•
Little formulation modification required for plastic-
applications – just replace the hardener and conven-
tional catalyst.
Exterior plastic coatings
for hang-on parts:
Speed meets appearance
Thermolatency combined with proven high-performance 2K PU technology
Crosslinking
Time
Blulogiq®
Standard Catalyzed
Heat
1
2
3
Auto OEM high bake line coating:
Increase efficiency de-bottleneck
Auto OEM low temp line coating:
Reduce temp after EDC to 100°C
Electro-
deposition
coating
Underbody
protection
PUR
BC
2 C
PUR CC
Electro-
deposition
coating
Underbody
protection
PUR
BC
2 C
PUR CC
140–160°C
100°C
ON

13
HDI biuret
NCO CONTENT ON
SUPPLY FORM
APPROX. [%]
FUNCTIONALITY
APPROX.
VISCOSITY AT 23°C
APPROX. [mPa · s]
EQUIVALENT
WEIGHT APPROX. COMMENTS
Desmodur® N 100 100 10,000 22.0 190 3.8
Weather-stable and non-yellowing topcoats. Very good compatibility with highly
branched polyols.
Desmodur® N 3200 100 2,500 23.0 185 3.5
Lower viscosity than Desmodur® N 100; especially for weather-stable and
non-yellowing high solids coatings, structural coatings and topcoats.
Desmodur® N 75 MPA/X 75 in MPA/X 250 16.5 255 3.8
Special supply forms of Desmodur N 100 for different applications. Other supply
forms available.
Desmodur® N 75 MPA 75 in MPA 250 16.5 255 3.8
Desmodur® N 75 BA 75 in BA 160 16.5 255 3.8
SUPPLY FORM
APPROX. [%]
Desmodur® N family

14
HDI specialties
COMMENTS
Desmodur® N 3400 Uretdione 100 150 21.8 195 2.5
Extremely low-viscosity crosslinker for waterborne and solvent-borne 2K PUR
coatings; also for moisture-curing 1K PUR systems, for topcoats in many con-
struction applications.
Desmodur® XP 2840
Uretdione/
Trimer
100 500 23.0 185 3.0
Low-viscosity crosslinker for waterborne and solvent-borne 2K PUR coatings;
also for moisture-curing 1K PUR systems.
Desmodur® XP 2860 Allophanate 100 500 20.0 215 2.5
Flexible, low-viscosity crosslinker for weather-stable high solids and waterborne
2K PUR coatings (e.g., in combination with Bayhydur® or Desmodur® types),
especially for industrial, automotive refinishing, transportation and plastic coatings.
Recommendable for flexible aliphatic cast systems.
SUPPLY FORM
APPROX. [%]
VISCOSITY AT 23°C
APPROX. [mPa · s]
TYPE
EQUIVALENT
WEIGHT APPROX.
NCO CONTENT ON
SUPPLY FORM
APPROX. [%]
FUNCTIONALITY
APPROX.
Desmodur® N family

15
Aliphatic polyisocyanates
Desmodur® / Desmodur® ultra*
N 3200 XP 2675
N 3790 BA
N 3800
eco N 7300
XP 2599
N 3400
XP 2860
ultra N 3600
ultra N 3689 SN
XP 2840
N 3900
Low viscosity
Low viscosity
Low viscosity
Low viscosity
High crosslinking density
Scratch resistance
High elasticity
Sustainability
IPDI polyisocyanate
PDI polyisocyanate
HDI/IPDI polyisocyanate blend
Also suitable for 2K wb
HDI polyisocyanate
Z 4470
XP 2565
Low viscosity
Fast drying – hardness Blends
XP 2489 XP 2838
XP 2847
XP 2763
N 100
N 75
ultra N 3300
ultra N 3390
* ultra:
0.1% residual
monomer content

16
IPDI-based
crosslinkers
COMMENTS
Desmodur® XP 2489 HDI/IPDI 100 22,500 21.0 200 3.2
Good weatherability, gloss and improved resistance; especially for 100% solids
applications, e.g., in-mould coating.
Desmodur® XP 2838 HDI/IPDI 100 3,000 21.0 200 3.0
Crosslinker for lightfast 2K PUR systems; mainly used as a binder for 100%
solids decorative floor coatings.
Desmodur® XP 2763 HDI/IPDI 86 in BA 2,100 10.2 412 3.0
Crosslinker for weather-stable 2K PUR and polyaspartic coatings; longer pot
life and extended application window, reduced dependency of humidity with
polyaspartic coatings.
Desmodur® XP 2847 HDI/IPDI 76.5 in BA 140 15.9 264 3.5
Very low viscous, HDI/IPDI-polyisocyanate with excellent chemical and weather
resistance.
Desmodur® Z 4470 SN IPDI 70 in SN 2,000 11.9 360 3.5 Fast-drying hardeners for lightfast 2K PUR coatings with high chemical and
weathering resistance. For automotive OEM, refinish and industrial applications.
Due to its high hardness, Desmodur® Z is recommended to be combined with
Desmodur® N products.
Desmodur® Z 4470 MPA/X IPDI 70 in MPA/X 1,500 11.9 360 3.5
Desmodur® Z 4470 BA IPDI 70 in BA 600 11.9 360 3.5
Desmodur® XP 2565 IPDI 80 in BA 2,800 12.0 350 2.5
Crosslinker for weather-stable, fast-drying high solids and waterborne 2K PUR
coatings, e.g., in combination with Bayhydur® types, for automotive refinish and
transportation applications.
SUPPLY FORM
APPROX. [%]
VISCOSITY AT 23°C
APPROX. [mPa · s]
TYPE
EQUIVALENT
WEIGHT APPROX.
NCO CONTENT ON
SUPPLY FORM
APPROX. [%]
FUNCTIONALITY
APPROX.
Desmodur® Z family
Fast-drying two-component polyurethane coatings with high chemical resistance.

17
Desmodur® eco N /
Bayhydur® eco family
Two-component polyurethane bio-based coatings with excellent
weatherability and resistance based on bio-based pentamethylene
diisocyanate (PDI).
•
Bio-based and significantly improved carbon footprint cradle-to-gate in comparison to HDI, based on
Life-Cycle-Assessment studies conducted according to ISO 14040/14044 Standards.
•
Bio-based process with significant improvement on energy efficiency.
OCN NCO
5
4
3
2
1
0
Potlife
Drying
Compatibility
Pendulum
hardness
Biocontent
Scratch
resistance
Chemical
resistance
Weathering
resistance
Bio-based hardener Petro-based hardener
5
excellent 0
bad
HDI
HDA
Precursor 2
Precursor 1
Refinery
Crude oil
4
3
2
1
PDI
PDA Fermentation
Bio-refinery
Biomass
2
1
CO2
4-step petro-based synthesis 2-step bio-based synthesis
Desmodur® eco N 7300

18
PDI-based
crosslinker
COMMENTS
Desmodur® eco N 7300 100 9,500 21.5 195 3.7 71
Contains renewable carbon. Outstanding weather stability and gloss retention,
non-yellowing; for automotive OEM, automotive refinish, plastics and industrial
coatings, structural coatings and topcoats.
Bayhydur® eco 701-90 90 in PGDA 5,000 17.9 232 3.6 61
Ionically modified (sulfonic acid) crosslinker for 2K WB coatings containing
renewable carbon. Highest chemical resistance, easy mixing and high gloss.
SUPPLY FORM
APPROX. [%]
VISCOSITY AT 23°C
APPROX. [mPa · s]
EQUIVALENT
WEIGHT APPROX.
BIO-BASED
CONTENT ON
SUPPLY FORM [%]*
NCO CONTENT ON
SUPPLY FORM
APPROX. [%]
FUNCTIONALITY
APPROX.
NEW
NEW
* Based on results of 14
C/total C according to ASTM D 6866

19
Aliphatic, hydrophilic polyisocyanates
Bayhydur®/Bayhydur® ultra*
ultra 305
ultra 2700
ultra 304
401-70 MPA/X
401-60 PGDA
ultra 2487/1
eco 701-90
XP 2655
ultra 307
XP 2451/1 XP 2547
Easy mixing
Robustness
Ready to use
Best water
resistance
Best chemical
resistance
Sustainable
Fast drying
Easy mixing
Best chemical
resistance
Ready to use
XP 2759
Fast drying
Chemical resistance
Longer potlife
Easy
processing
Best water
resistance
Low viscosity, low VOC
Fast drying
Improved
performance
Robust
processing
Improved
chemical
resistance
Improved
weather
resistance
IPDI polyisocyanate
HDI polyisocyanate
2858 XP
quix 306-70
HDI/IPDI blend
HDI/TDI
ultra 3100
PDI polyisocyanate
* ultra:
0.1% residual
monomer content

20
The key to easy and reliable application of waterborne two-component
polyurethane systems. Bayhydur® ultra qualities perform with 0.1%
monomer content.
Hydrophilic-modified
polyurethane hardener
Bayhydur® family
OCN
O
N N
N N
H
SO3 NR3H
hydrophilic
hydrophobic
- +
R
O
N
O O
OCN
COMMENTS
Bayhydur® ultra 3100 HDI 100 2,800 17.4 240 3.1 Polyether-modified, standard. Versatile and economical.
Bayhydur® ultra 304 HDI 100 4,000 18.2 230 3.8
Polyether-modified. Versatile use and improved mixing. Excellent water and
weathering resistance.
Bayhydur® ultra 305 HDI 100 6,500 16.2 260 4.0 Polyether-modified. Easiest mixing and high gloss.
Bayhydur® ultra 307 HDI 100 6,000 20.3 207 3.4
Ionically modified (sulfonic acid) hardener with low monomer content. Highest
chemical resistance, easy mixing. Indoor-air-quality compliant and very fast curing.
Bayhydur® XP 2451/1 HDI 100 800 20.3 205 3.0
Polyether-modified, standard. Low viscosity, suitable for 100% solids formulations,
Indoor-air-quality compliant.
Bayhydur® ultra 2487/1 HDI 100 5,400 20.6 205 3.4 Ionically modified (sulfonic acid). Highest chemical resistance and very fast curing.
Bayhydur® XP 2547 HDI 100 650 22.5 185 3.0
Ionically modified (sulfonic acid). Highest chemical resistance, low viscosity,
suitable for 100% solids formulations.
Bayhydur® XP 2655 HDI 100 3,500 20.8 205 3.2
Ionically modified (sulfonic acid). Highest chemical resistance, easy mixing.
Indoor-air-quality compliant and very fast curing.
Bayhydur® ultra 2700 HDI 65 in PGDME 75 10.6 400 4.0
Ready to use hardener based on Bayhydur® ultra 305. Easiest mixing and high
gloss.
SUPPLY FORM
APPROX. [%]
VISCOSITY AT 23°C
APPROX. [mPa · s]
TYPE
EQUIVALENT
WEIGHT APPROX.
NCO CONTENT ON
SUPPLY FORM
APPROX. [%]
FUNCTIONALITY
APPROX.
NEW

21
Bayhydur® family
COMMENTS
Bayhydur® 2858 XP HDI/IPDI 70 in PGDA 500 13.3 315 3.4
Ionically modified (sulfonic acid) ready-to-use hardener. Fast drying, easy
mixing, high chemical resistance.
Bayhydur® 401-70 MPA/X IPDI 70 in MPA/X 600 9.4 440 2.9 Polyether-modified, standard type. Fast drying, good chemical resistance.
Bayhydur® 401-60 PGDA IPDI 60 in PGDA 1,100 8.0 525 2.9 Supply form of Bayhydur® 401-70 without aromatic solvents.
Bayhydur® XP 2759 IPDI 70 in MPA 6,500 11.0 380 3.1
Ionically modified (sulfonic acid). Fast drying, easy mixing, high chemical
resistance.
Bayhydur® eco 701-90 PDI 90 in PGDA 5,000 17.9 232 3.6
Ionically modified (sulfonic acid) crosslinker for 2K WB coatings containing
renewable carbon. Highest chemical resistance, easy mixing and high gloss.
Bayhydur® quix 306-70 HDI/TDI 70 in MPA 250 13.5 311 3.3
Fastest drying and good chemical resistance, specially designed for wood
coatings.
SUPPLY FORM
APPROX. [%]
VISCOSITY AT 23°C
APPROX. [mPa · s]
TYPE
EQUIVALENT
WEIGHT APPROX.
NCO CONTENT ON
SUPPLY FORM
APPROX. [%]
FUNCTIONALITY
APPROX.
OCN
O
N N
N O
H
hydrophobic hydrophilic
O
N
O O
OCN
O
O R
NEW
NEW

22
Hydrophilic hardener for largely pH-neutral aqueous polymer dispersions
in adhesive applications. Desmodur® ultra qualities perform with 0.1%
monomer content.
Hardeners for
latent-reactive
adhesives
Desmodur® D family
COMMENTS
COMMENTS
Desmodur® ultra DA-L HDI 100 3,000 20.0 210 Crosslinking agents for OH-functional dispersions, e.g., polyurethane, polyvinyl acetate,

polyacrylate or synthetic rubber dispersions. Improved resistance to heat, water, plasticizers
and many solvents.
Desmodur® ultra DN HDI 100 1,250 21.8 195
Desmodur® Z 2589 IPDI
micronized
powder
65 17.0 250
After suitable deactivation, Desmodur® Z 2589 can be used in combination with Dispercoll® U
as a curing component for one-component latent-reactive polyurethane dispersion adhesives, for
the formulation of latent-reactive adhesive layers or for the formulation of latent-reactive film.
Dispercoll® BL XP 2514 TDI 40 in water 9.0 465
Dispercoll® BL XP 2514 can be used as the crosslinking component in combination with
Dispercoll® U for the formulation of one-component, latent-reactive polyurethane dispersion
adhesives.
SUPPLY FORM
APPROX. [%]
SUPPLY FORM
APPROX. [%]
VISCOSITY AT 23°C
APPROX. [mPa · s]
Tg [°C]
TYPE
TYPE
EQUIVALENT
WEIGHT APPROX.
EQUIVALENT
WEIGHT APPROX.
NCO CONTENT ON
SUPPLY FORM
APPROX. [%]
NCO CONTENT ON
SUPPLY FORM
APPROX. [%]

23
Solvent-borne grades for 1K PU stoving systems with high-performance
properties. The aliphatic grades are light-stable and weather-resistant.
Thermally activated
Desmodur® BL family
COMMENTS
Desmodur® BL 3475 HDI/IPDI DEM 75 in SN/BA 1,000 510 8.2 Highest reactivity, transesterification of blocking agent.
Desmodur® BL 3370 HDI DEM/DIPA 70 in MPA 3,800 470 8.9 Highest reactivity.
Desmodur® PL 340 IPDI DMP 60 in BA/SN 600 575 7.3 Lower thermal yellowing, high chemical resistance.
Desmodur® PL 350 HDI DMP 75 in MPA/SN 4,300 400 10.5 Lower thermal yellowing, more flexible.
Desmodur® BL 3575/1 HDI DMP 75 in MPA/SN 3,600 400 10.5 Lower thermal yellowing and lowest color value.
Desmodur® BL 3175 HDI MEKO 75 in SN 3,300 380 11.1 Standard grade, more flexible.
Desmodur® BL 4265 IPDI MEKO 65 in SN 11,000 520 8.1 Standard grade, high chemical resistance, higher hardness.
Desmodur® BL 5375 H12
MDI MEKO 75 in SN/MPA 4,000 470 8.9
Highest flexibility, as additive for stoving systems to improve

flexibility and adhesion.
Desmodur® BL 2078/2 IPDI Ɛ-CAP 60 in SN 1,750 600 7.0
Polyurethane crosslinker with Food Contact Notification,
FCN No. 695*, used as additive to improve performance of
polyester/melamine coatings for interior can coatings, higher
film thickness possible.
Desmodur® BL 3272 HDI Ɛ-CAP 72 in MPA 2,700 410 10.2 Higher film thickness possible.
Desmodur® BL 1100/1 TDI Ɛ-CAP 100 43,000 1,400 3.0
1K stoving primer with high film thickness and good stone-chip
resistance, coil coating primer in combination with cycloaliphatic
diamines for 1K stoving primers possible.
Desmodur® BL 1265/1 TDI Ɛ-CAP 65 in MPA/X 20,000 875 4.8
1K stoving primer for stone-chip resistance primer (hard elastic),
coil coating primer, combination partner for Desmodur® BL 1100
to improve hardness and cold-resistance.
SUPPLY FORM
APPROX. [%]
TYPE
VISCOSITY AT 23°C
APPROX. [mPa · s]
BLOCKING
AGENT
CALCULATED BLOCKED
NCO CONTENT ON
SUPPLY FORM APPROX. [%]
EQUIVALENT
WEIGHT APPROX.
HN
O
O
O
BL
BL
BL
H
NH
N
* See page 7

24
Self-crosslinking
urethane resin
COMMENTS
Bayhytherm® 3246/1 HDI DMP 46 in water/PnB/SN 800 For waterborne 1K PUR stoving coatings.
Desmotherm® 2170 MDI DEM 70 in BA/SN/IB 2,000 For solvent-borne 1K PUR stoving coatings (primer and primer surfacer).
BLOCKING
AGENT
SUPPLY FORM
APPROX. [%]
TYPE
VISCOSITY AT 23°C
APPROX. [mPa · s]
NCO-BL
NCO-BL
OH
OH
OH
Bayhytherm® / Desmotherm®
NEW

25
Thermally activated PU hardeners
Desmodur® BL / Bayhydur® BL / Baybond® XL
BL 1100/1
BL 3370
BL 3175
BL 1265/1
IPDI polyisocyanate
HDI/IPDI polyisocyanate blend
* PMT = Peak Metal Temperature
**Food Contact Notification since 2007
HDI polyisocyanate H12
MDI
TDI prepolymer
Limited UV stability
Highest reactivity
BL 4265
BL 3272
BL 2078/2
Flexibility
BL 5375
High–solid content
Baybond®
XL 6366
Baybond®
XL 1187
Bayhydur®
BL 2781
Caustic resistance
Bayhydur®
BL 5335
BL 3475
Lowest thermal yellowing
Bayhydur®
BL XP 2706
Bayhydur®
BL 2867
High film thickness
FCN No. 695**
Low thermal yellowing
Food contact
acc. to
EU 10/2011
Food contact
acc. to
EU 10/2011
Thermal-yellowing resistance OEM CC level
PL 350 BL 3575/1
PL 340
Lowest color value
REACTIVITY
REACTIVITY
PMT* 180°C
10–15 min, 140°C
25–30 min, 120°C
30 min, 130°C
30 min, 150°C
30 min, 160°C
PMT* 210°C
10–15 min, 160°C
30 min, 140°C
PMT* 230°C
10–15 min, 180°C
30 min, 160°C
PMT* 240°C
10–15 min, 200°C
30 min, 170°C
Solvent-borne Desmodur® BL Waterborne Bayhydur® BL
and Baybond® XL
Baybond®
XL 7270
Baybond®
XL 825
Baybond®
XL 3674
Hardness, chemical resistance Hardness, chemical resistance
Hardness, chemical resistance
Hardness, chemical resistance Hardness, chemical resistance

26
Waterborne grades for water-based 1K PU stoving systems with
high-performance polyurethane properties. The aliphatic grades
are light-stable and weather-resistant.
Thermally activated
Waterborne
carbodiimide crosslinker
Bayhydur® BL and Baybond® family
COMMENTS
Bayhydur® BL XP 2706 HDI/IPDI DMP 40 in water 2,500 1,275 3.3/(8.2)
High reactive, good chemical resistance, lowest thermal
yellowing, neutralized with DMEA.
Bayhydur® BL 2867 HDI DMP 38 in water 1,500 960 4.4/(11.5)
High reactive, good chemical resistance, high flexibility and
outstanding adhesion.
Bayhydur® BL 2781 HDI MEKO 37 in water 4,900 1,200 3.5/(9.5) High flexibility, good adhesion. Neutralized with DMEA.
Bayhydur® BL 5335 H12MDI MEKO 35inwater/MPA/X 200 1,680 2.5/(7.1) High flexibility, Caustic resistance, limited UV stability.
Baybond® XL 6366 HDI MEKO 45 in water 200 975 5.6/(12.5) High solid content, high flexibility.
Baybond® XL 1187 HDI MEKO 30 in water 200 1,450 2.9/(98) High particle size, flexible and non-ionic characters.
Baybond® XL 825 HDI Ɛ-CAP 30 in water 200 1,400 3.0/(10.0)
Low thermal yellowing, improved impact strength, adhesion
and flexibility.
Baybond® XL 7270 HDI Ɛ-CAP 30 in water 100 1,000 3.9/(13.1)
Low thermal yellowing, improved impact strength, adhesion
and flexibility, food contact acc. to EU 10/2011.*
Baybond® XL 3674 HDI Ɛ-CAP 30 in water 200 1,310 3.2/(10.7) Food contact acc. to EU 10/2011.*
Desmodur® XP 2802 Carbodiimide 40 in water 30 1 mmol – N = C = N – /g 210
Potential crosslinker for carboxyfunctional dispersions.
The product is used in adhesive applications with extremely
long pot life.
SUPPLY FORM
APPROX. [%]
VISCOSITY AT 23°C
APPROX. [mPa · s]
TYPE
TYPE
VISCOSITY AT 23°C
APPROX. [mPa · s]
FUNCTIONAL GROUPS
APPROX.
BLOCKING
AGENT
SUPPLY FORM
APPROX. [%]
CALCULATED BLOCKED NCO
CONTENT ON SUPPLY FORM
APPROX. [%]/(ON RESIN [%])
EQUIVALENT
WEIGHT APPROX.
EQUIVALENT WEIGHT
APPROX.
HN
O
O
O
BL
BL
BL
H
NH
N
NEW
NEW
NEW
* See page 7

27
Powder hardeners
Crelan® family
COMMENTS
Crelan® EF 403
Internally blocked linear IPDI
polyisocyanate
Flakes 40–55 310 15 min at 180°C
For emission-free powder coatings with outstanding leveling
and pigment wetting and for special one-shot matte coatings.
Crelan® UI
Blocked linear IPDI
polyisocyanate
Flakes 60 365 15 min at 180°C
For powder coating with good leveling and good pigment
wetting or to improve coating properties of hybrid systems.
Crelan® VP LS 2256
Blocked linear IPDI
polyisocyanate
Flakes 48–58 280 15 min at 180°C
For high chemical resistance powder coatings with easy-to-clean
properties and standard powder coatings with good overall
properties.
Tg [°C]
TYPE
EQUIVALENT
WEIGHT APPROX.
SUPPLY FORM
APPROX. [%]
STANDARD
BAKING CYCLE
Solid blocked polyisocyanate crosslinkers for polyurethane powder
coatings with high chemical resistance and smooth surfaces.

28
Blocked aromatic urethane resins for flexibilization of epoxy systems.
Blocked
TDI prepolymers
Desmocap® family
Desmocap® 14 CNB 100 30,000
For elastic coatings and sealants; for flexibilization of epoxy resins.
Target applications: industrial flooring, parking decks. Alternative to Desmocap® 11: cashew nut shell liquid as blocking agent.
Desmocap® 12 100 40,000
For elastic coatings and sealants; for flexibilization of epoxy resins. Stronger flexibilizing effect than Desmocap® 11.
Target applications: industrial flooring, parking decks, pourable joint sealants.
Desmocap® 11 100 100,000
Target applications: industrial flooring, parking decks.
Desmocap® 1190 90 in Adimoll® DO 30,000
Target applications: industrial flooring, parking decks.
SUPPLY FORM
APPROX. [%]
VISCOSITY AT 23°C
APPROX. [mPa · s]
COMMENTS
NEW

30
Hardeners for reactive, high-performance 2K PUR industrial adhesives.
Desmodur® R: color of the dried adhesive
film
Desmodur® R family
COMMENTS
VISCOSITY AT 23°C
APPROX. [mPa · s]
TYPE
NCO CONTENT ON
SUPPLY FORM
APPROX. [%]
SUPPLY FORM
APPROX. [%]
EQUIVALENT
WEIGHT
APPROX.
Desmodur® RC TDI isocyanurate 35 in EA 3 7.0 600 Especially pale-colored adhesives.
Desmodur® ultra RN TDI/HDI isocyanurate 40 in EA 11 7.2 585 Especially pale-colored adhesives. Lower discoloration.
Desmodur® RE
Triphenylmethan-4,4’,4”-
triisocyanate
27 in EA 3 9.3 450
Highly effective crosslinker for adhesives based on Desmocoll®,
natural or synthetic rubber. Suitable as primer on metal substrates.
Desmodur® RFE
Tris (p-isocyanatophenyl)
thiophosphate
27 in EA 3 7.2 583
Crosslinker with very universal suitability for adhesives based on
Desmocoll®, natural or synthetic rubber. Suitable as primer on glass
substrates.

31
Desmodur® monomers
Aliphatic
diisocyanates
COMMENTS
Desmodur® H HDI 3 84 2 ≤ 30 Raw material for Desmodur® N family, building block.
Desmodur® I IPDI 10 111 2 ≤ 30 Raw material for Desmodur® Z family, building block.
Desmodur® W H12
MDI 30 131 2 ≤ 30 Building block.
EQUIVALENT WEIGHT
APPROX.
TYPE
FUNCTIONALITY
VISCOSITY AT 23°C
APPROX. [mPa · s]
COLOR INDEX
[HAZEN]
Covestro is the leading company that offers you the complete range of aliphatic and aromatic monomeric diisocyanates (monomers) as well as oligomeric isocyanates
(polyisocyanates) and NCO-functional prepolymers. Especially the monomers are widely used as building blocks
•
to create a diverse portfolio of polyurethane dispersions (PUDs),
•
to modify acrylic/alkyd polymer to improve properties such as faster drying or better UV stability,
• to create urethane acrylates or use them for other urethanizations,
•
to create a diverse portfolio of thermoplastic polyurethanes (TPU) with different characteristics,
•
to create a diverse portfolio of low and high Tg-cast polyurethanes (CPU) with different characteristics for industrial CPUs, electrical encapsulation, label doming etc.

32
Aromatic crosslinker for coatings and adhesives. Desmodur® ultra qualities
perform with 0.1% monomer content.
Desmodur® L family
TDI-based
crosslinkers
Desmodur® ultra L 75 Adduct 75 in EA 1,600 13.3 315 2.7 9.5 240 Ultra-low monomer grade of Desmodur® L 75.
Desmodur® L 75 Adduct 75 in EA 1,600 13.3 315 2.7 9.5 240
Crosslinker for use in anti-corrosion coatings, indus-
trial coatings, wood and furniture finishes, concrete
coatings as well as solvent-borne adhesives.
Desmodur® L 67 MPA/X Adduct 67 in MPA/X 1,600 11.9 350 2.7 13 255
Desmodur® L 67 BA Adduct 67 in BA 600 11.9 350 2.7 17 180
Desmodur® ultra IL BA Isocyanurate 51 in BA 2,000 8.0 525 4.5 2 6
Very hard and very fast-drying coatings for wood,
furniture and paper.
Desmodur® ultra IL EA Isocyanurate 51 in EA 700 8.0 525 4.5 3.5 5
Desmodur® ultra IL 1351 BA Isocyanurate 51 in BA 1,300 8.0 525 4.5 2.5 6
Desmodur® IL 1451 BA Isocyanurate 51 in BA 250 7.4 565 4.8 3 8
See Desmodur® ultra IL 1351 BA but with improved
compatibility.
TYPE
VISCOSITY AT 23°C
APPROX. [mPa · s]
NCO (SUPPLY FORM)
APPROX. [%]
SUPPLY FORM
APPROX. [%] COMMENTS
EQUIVALENT
WEIGHT APPROX.
GEL TIME WITH
DESMOPHEN® 1300 X [h]
DRYING STAGE 3
WITH DESMOPHEN®
1300 X [min]
DIN EN ISO 9117/5
FUNCTIONALITY
APPROX.
These products represent only a selection of the TDI-based products primarily used in coating applications.
Additional TDI-based products can be found, for example, on the Covestro CAS website: www.coatings.covestro.com
TDI-/HDI-based
crosslinkers
Desmodur® HL BA Isocyanurate 60 in BA 2,200 10.5 400 4.4 3 12 Fast-drying coatings for wood, furniture, metal, plastic
and paper with better elasticity than Desmodur® IL
and better lightfastness.
Desmodur® HL EA Isocyanurate 60 in EA 1,100 10.5 400 4.4 4 10
TYPE
VISCOSITY AT 23°C
APPROX. [mPa · s]
NCO (SUPPLY FORM)
APPROX. [%]
SUPPLY FORM
APPROX. [%] COMMENTS
EQUIVALENT
WEIGHT APPROX.
GEL TIME WITH
DESMOPHEN® 1300 X [h]
FUNCTIONALITY
DRYING STAGE 3
WITH DESMOPHEN®
1300 X [min]
DIN EN ISO 9117/5

33
For coatings and adhesives.
Desmodur® polymeric MDI
products (pMDI)
For adhesives
COMMENTS
EQUIVALENT WEIGHT
APPROX.
VISCOSITY AT 25°C
APPROX. [mPa · s]
FUNCTIONALITY
NCO (SUPPLY FORM)
APPROX. [%]
GEL TIME WITH
CASTOR OIL [min]
OCN NCO
MDI
Desmodur® VK 5 23 32.5 130 2.2 60
Building block for prepolymers, high 2,4’-MDI content, good compatibility with
polyethers.
Desmodur® VK 10 90 31.5 135 2.6 40
1K and 2K adhesives, high 2,4’-MDI content, low pMDI content,
good compatibility with polyethers.
Desmodur® VK 10 L 90 31.5 135 2.6 50
1K and 2K adhesives, high 2,4’-MDI content, low pMDI content good
compatibility with polyethers, lower reactivity than Desmodur® VK 10.
Desmodur® VL R 10 120 31.5 135 2.8 45 Standard 2K adhesives, low viscosity.
Desmodur® VKS 20 200 31.5 135 2.9 45 Standard 2K adhesives, low acidity.
Desmodur® VKS 20 F 200 31.5 135 2.9 40 Standard 2K adhesives, high acidity.
Desmodur® 44V40 L 300 31.0 135 3.0 50 Standard 2K adhesives, high functionality.
Desmodur® 44V70 L 680 31.3 135 3.2 50 Standard 2K adhesives, highest functionality.

34
OCN NCO
MDI
Desmodur® polymeric MDI
products (pMDI)
For coatings
and membranes
Desmodur® VL 50 23 32.5 130 2.2 60
Very low viscosity; same applications as Desmodur® VL but better
compatibility with polyethers and lower reactivity; more flexible.
Desmodur® VL 51 21 32.5 130 2.2 50
Very low viscosity; same applications as Desmodur® VL but better
compatibility with polyethers and lower reactivity; more flexible.
Desmodur® VP.PU 60RE11 21 32.5 130 2.2 45 Very low viscosity; high 2-ring content.
Desmodur® XP 2551 66 32.0 130 2.5 50 Crosslinker primarily for polyol emulsions.
Desmodur® VL 90 31.5 135 2.6 40 Crosslinker for 100% solids coatings, sealants and membranes.
Desmodur® VL R 10 120 31.5 135 2.8 45
Higher reactivity than Desmodur® VL; for 100% solids spray coatings and
membranes.
Desmodur® VL R 20 200 31.5 135 2.9 45
Higher reactivity than Desmodur® VL; for 100% solids spray coatings and
membranes.
Desmodur® VKS 20 F 200 31.5 135 2.9 40
Lower reactivity than Desmodur® VL R 20; for 100% solids coatings and
membranes.
COMMENTS
EQUIVALENT WEIGHT
APPROX.
VISCOSITY AT 25°C
APPROX. [mPa · s]
FUNCTIONALITY
NCO (SUPPLY FORM)
APPROX. [%]
GEL TIME WITH
CASTOR OIL [min]

35
Prepolymers based on aliphatic diisocyanates display good weather stability and are color-stable.
These unique properties are important for applications such as corrosion protection or non-yellowing
coatings and adhesives. Desmodur® ultra qualities perform with 0.1% monomer content.
Desmodur® prepolymers
Prepolymers
based on HDI
Prepolymers
based on IPDI
Desmodur® XP 2617 12.5 0.5 335 100 4,250 2 2,400 1K bonding of rubber pellets, 2K adhesives.
Desmodur® E 2863 XP 11.0 0.3 380 100 1,350 2.2 N/A
Highly elastic prepolymer for waterproofing membranes, floor coatings,
suitable combination with aspartic esters.
Desmodur® XP 2599 6.0 ≤ 0.3 700 100 2,500 4 3,500 2K coatings and 2K adhesives.
Desmodur® E 3265 MPA/SN 10.4 ≤ 0.26 405 65 in MPA/SN 1,200 4.2 3,100
Anti-corrosion coatings, good weather stability, non-yellowing,
1K application.
Desmodur® ultra E 3370 9.8 ≤ 0.1 420 70 in MPA/SN 1,400 4 4,900
Anti-corrosion coatings, good weather stability, non-yellowing,
1K application.
Desmodur® VPLS 2371 3.7 2.0 1,100 100 9,800 2 11,500 1K construction coatings, 1K sealants.
Desmodur® XP 2406 2.8 0.5 1,500 80 in MPA 7,000 2 5,800 Elastic coatings and sealants with very good weather stability.
EQUIVALENT WEIGHT
APPROX.
NCO (SUPPLY FORM)
APPROX. [%]
SUPPLY FORM
APPROX. [%] FUNCTIONALITY
MONOMER
CONTENT
[%] COMMENTS
VISCOSITY AT 23°C
APPROX. [mPa · s]
DRYING TIME (MOISTURE
CURING SYSTEM)
23°C/50% r.h. [min]

36
Prepolymers are NCO-functional reaction products of aromatic or
aliphatic isocyanates and polyols, such as polyethers or polyesters.
The wide variability of the isocyanate content and functionality enables
the viscosity of the prepolymers and the mechanical properties of
the finished products to be precisely adjusted.
Desmodur® prepolymers
Prepolymers
based on TDI
Desmodur® E 1361 MPA/X 6.8 620 61 in MPA/X 500 2.8 ≤ 0.4 120 Fast-drying 1K moisture-curing coatings.
Desmodur® E 1361 BA 6.8 620 61 in BA 250 2.8 0.5 90 Fast-drying 1K moisture-curing coatings.
Desmodur® E 1160 MPA/X 5.4 780 60 in MPA/X 550 3 ≤ 0.4 740 1K moisture-curing coatings.
Desmodur® E 1660 5.3 790 60 in BA 1,600 2 0.5 25
Very fast-drying 1K moisture-curing coatings in combination with other
Desmodur® E types.
Desmodur® E 15 4.4 955 100 7,000 2 0.5 2,800 2K elastic park deck coatings, 1K sealants.
Desmodur® E XP 2605/1 4.3 975 50 in BA 250 3.7
≤ 0.4 TDI
1.0 MDI
25 Very fast drying, for parquet and furniture.
Desmodur® E 14 3.3 1,270 100 6,800 2.5 0.5 1,400
2K elastic park deck coatings, 1K sealants, flexibilization of
anti-corrosion systems.
SUPPLY FORM
APPROX. [%]
NCO (SUPPLY FORM)
APPROX. [%]
VISCOSITY AT 23°C
APPROX. [mPa · s]
MONOMER
CONTENT [%]
EQUIVALENT
WEIGHT APPROX COMMENTS
FUNCTIONALITY
DRYING TIME (MOISTURE
CURING SYSTEM)
23°C/50% r.h. [min]

38
Prepolymers are the reaction products of aromatic or aliphatic isocyanates and polyols, such as polyethers
or polyesters. The wide variability of the building blocks, isocyanate content and functionality enables the
viscosity of the prepolymers and the mechanical properties of the final products to be precisely adjusted.
Desmodur® and Desmoseal® M
Prepolymers
based on MDI
Desmodur® VH 20 N 24.5 173 280* 2.1 770 Gymnasium floors, storage-stable at low temperatures.
Desmodur® E 29 24.0 175 220* 2.2 140 1K primer for flooring applications, binder for corrosion protection.
Desmodur® E XP 2753 21.5 195 400 2.2 100 Corrosion protection, e.g., pipe coatings.
Desmodur® 2665A 16.3 255 4,500* 2.7 65
1C wood bonding (D4) – higher reacitivity compared to E 21,
2K adhesives.
Desmodur® E 21 16.0 260 5,400* 2.8 110 1K wood bonding (D4), 2K adhesives, binder for corrosion protection.
Desmodur® E 20100 15.7 265 1,100 2.0 180
1K resin for sealing of water-conveying cracks in structures above and
below ground, raw material for injection systems.
Desmodur® E XP 2723 15.4 270 1,500* 2.3 480 1K assembling adhesives, 2K adhesives.
Desmodur® E 23 15.4 270 1,800 2.1 130
1K wood bonding (D4), 2K flexible packaging adhesives, binder for
corrosion protection.
Desmodur® E XP 2762 14.3 295 4,500 2.1 15
1K wood bonding (D4) – higher reacitivity compared to E 23,
2K adhesives.
Desmodur® E XP 2727 15.3 275 800 2.0 640 1K and 2K binder for corrosion protection.
Desmodur® E XP 2715 15.1 280 950 (70°C) 2.0 – Precursor for low monomer 1K PUR hot melts.
Desmodur® E 2190 X 14.3 295 1,100* 2.8 115 90% supply form of Desmodur® E 21 in xylene.
Desmodur® E 2200/76 9.9 425 2,750* 2.0 1,100 Flexible packaging.
Desmodur® E 22 8.6 490 2,800 2.0 190 1K bonding of rubber pellets, 2K adhesives.
Desmoseal® M 280 2.1 2,000 33,000 2.7 200 1K sealants, 1K elastic adhesives.
VISCOSITY AT 23°C
(* 25°C) APPROX. [mPa · s]
NCO (SUPPLY FORM)
APPROX. [%]
FUNCTIONALITY
EQUIVALENT
WEIGHT APPROX COMMENTS
DRYING TIME
(MOISTURE CURING SYSTEM)
23°C/50% r.h. [min]

39
BK 10 drying recorder
(test method PV 123)
0 200 400 600 800 1000 1200
minutes
VH 20 N
E 29
E XP 2753
E 21
2665A
E 20 100
E XP 2723
E 23
E XP 2762
E XP 2727
E 2200/76
E 22
M 280
Drying recorder test
FBT – film building time FDT – film drying time
Measuring conditions:
Film thickness: 250 μm
Temperature: 23°C
Humidity: 50%
Speed: 5.1 cm/h
NCO prepolymers for reactive adhesives:
Reactivity of MDI-based prepolymers
End of needle track/start
dotted needle track
Glass strip
Film building time (FBT)
Film drying time (FDT)
Beginning of visible
needle track
Measuring needle
(weight 10 g)
Start of recording
minutes
Drying recorder test
FBT – film building time FDT – film drying time
NCO prepolymers for reactive adhesives:
Reactivity of prepolymers based on TDI, HDI, IPDI
0 2000 4000 6000 8000 10000 12000
E 3370 MP A/S N
E 1361 MP A/X
E 1160 MP A/X
E 14
XP 2617
E 15
XP 2599
VP LS 2371

40
Silane-terminated polyurethanes (STP) combine the advantages of a polyurethane backbone and
silane-based curing mechanism, such as excellent cohesive strength and good adhesion properties.
They cover the complete application range from low modulus sealants up to structural adhesives.
Desmoseal® S family
Silane-terminated
polyurethanes
COMMENTS
Desmoseal® S XP 2774 100 – 50,000 Very high For low modulus sealants with very high elongation.
Desmoseal® S XP 2636 100 – 40,000 High For low modulus sealants and elastic adhesives with high elongation.
Desmoseal® S XP 2458 90 Mesamoll 35,000 Medium Elastic adhesives and high-modulus sealants with medium elongation.
Desmoseal® S 2876 100 – 25,000 Medium Elastic adhesives and high-modulus sealants with medium elongation.
Desmoseal® S XP 2749 100 – 5,100 Low For plasticizer-free adhesives with high hardness.
Desmoseal® S XP 2821 100 – 20,000 Low For structural adhesives with high tensile strength and lap shear strength.
VISCOSITY AT 23°C
APPROX. [mPa · s]
SOLID CONTENT [%]
MOLECULAR
WEIGHT
PLASTICIZER
NEW
NEW

42
For low-modulus sealants with excellent elastic recovery. Covestro offers a new starting formulation
which has been classified according to ISO 11600–F–25 LM (ift Rosenheim*).
Desmoseal® S XP 2774
* Detailed information on formulation and ift test report available on request
Film drying time (drying recorder 100 µm wet) 2:30 h
Shore A hardness according to DIN ISO 7619-1 20
Elongation at break according to DIN 53504 800%
Tensile strength according to DIN 53504 3.0 N/mm2
Tensile stress at 100% elongation according to DIN 53504 0.2 N/mm2
Elastic recovery according to DIN EN ISO 7389 (B) 74%
Resistance to flow according to DIN EN ISO 7390 1 mm
Secant tensile modulus according to DIN EN ISO 8339 (23°C)
(–20°C)
0.32 N/mm2
0.38 N/mm2
Tensile properties at maintained extension according to DIN EN ISO 8340 No failure
Adhesion/cohesion properties at variable temperatures according to DIN ES ISO 9047 No failure
Adhesion/cohesion properties at maintained extension after water immersion according to DIN EN ISO 10590 No failure
Loss of volume according to DIN EN ISO 10563 1.7%

44
OCN NCO
MDI
For coatings and adhesives.
Desmodur® monomers
Monomeric
TDI products
Desmodur® T 65 N 48 67.0 3 2 87 100/40
Desmodur® T 80 48 80.5 3 2 87 100/40 Stabilizer: Irganox® 1076 FD.
Desmodur® T 100 48 ≥ 99.0 3 2 87 20/20 Stabilizer: Irganox® 1076 FD.
Desmodur® T 100 SP 48 ≥ 99.0 3 2 87 50/50
Stabilizer: Irganox® 1076 FD, for prepolymers with
improved storage stability.
VISCOSITY AT 25°C
APPROX. [mPa · s]
NCO APPROX. [%]
FUNCTIONALITY
HC MAX./ACIDITY MAX.
[mg/kg Cl-
]/[mg/kg HCL]
2,4-TDI
CONTENT [%] COMMENTS
EQUIVALENT
WEIGHT
Monomeric
MDI products
FUNCTIONALITY
NCO APPROX. [%]
EQUIVALENT
WEIGHT
VISCOSITY AT 25°C
APPROX. [mPa · s] COMMENTS
TDI
CH3
CH3
NCO
NCO
OCN
NCO
Desmodur® 44 M liquid 33.6 4 (40°C) 2.0 125 Flexible packaging, hot melts, sealants; additional supply forms: fused and flakes.
Desmodur® 44 MC liquid 33.6 4 (40°C) 2.0 125
Hot melts, sealants, prepolymers with improved storage and color stability;
additional supply forms: fused and flakes.
Desmodur® LS 2424 33.6 12 2.0 125 Flexible packaging, hot melts, approx. 55% 2,4’-MDI/45% 4,4’-MDI.
Desmodur® 2460 M 33.6 12 2.0 125 Flexible packaging, hot melts, approx. 55% 2,4’-MDI/45% 4,4’-MDI color stabilized.
Desmodur® CD-S 29.5 35 2.1 142
Hot melts, sealants, modified monomeric MDI, liquid at room temperature,
storage-stable at low temperatures.

Legend
Solvents
BA Butyl acetate
SN Solvent naphtha 100
MPA Methoxypropyl acetate
X Xylene
EA Ethyl acetate
PGDME Dipropylene glycol dimethyl ether
PGDA Propylene glycol diacetate
IB Isobutanol
Isocyanates
HDI Hexamethylene diisocyanate
IPDI Isophorone diisocyanate
PDI Pentamethylene diisocyanate
H12
MDI Dicyclohexylmethane diisocyanate
TDI Toluene diisocyanate
MDI Diphenylmethane diisocyanate
Blocking agents
DEM Diethylmalonate
DIPA Diisopropylamine
DMP Dimethylpyrazole
MEKO Methylethylketoxime
Ɛ-CAP Ɛ-Caprolactam

46
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This information and our technical advice – whether verbal, in writing or by ways of trial – are given in good faith but without warranty, and this also applies where proprietary rights of third parties are involved.
The information is provided by Covestro without assumption of any liability. If any of the above mentioned regulations change after the date of declaration, this declaration is no longer valid. Covestro will strive
to keep this information up-to-date. Our advice does not release you from the obligation to verify the information provided – especially that contained in our safety data and technical information sheets –, to
check for updates of any information provided by us and to test our products as to their suitability for the intended processes and uses. The application, use and processing of our products and the products
manufactured by you on the basis of our technical advice are beyond our control and, therefore, entirely your own responsibility. Our products are sold in accordance with the current version of our General
Conditions of Sale and Delivery.
Covestro Deutschland AG
Business Unit Coatings,
Adhesives and Specialties
51365 Leverkusen
Germany
www.coatings.covestro.com
cas-info@covestro.com Edition: 2019 · Order No.: COV00086497 · Printed in Germany

Polyisocyanates and Prepolymers.pdf

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