Raising insulation performance with advanced chemistries - Highlight
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This document provides an overview and comparison of epoxy and polyurethane systems for insulation applications. It discusses the chemistry, features, and benefits of both epoxy and polyurethane systems. Key points covered include epoxy systems providing excellent cross-linking and impregnation with high glass transition temperatures, while polyurethane systems offer advantages such as lower viscosity, reduced exothermic reaction, flexibility, and flame resistance. The document also compares properties like viscosity and exothermic reaction between the two material types.
Raising insulation performance with advanced chemistries - Highlight
- 1. Advanced Materials Raising insulation performance with advanced chemistries Quarter 2, 2013
- 2. Advanced Materials 2 Table of contents A broad portfolio - epoxy vs polyurethane Epoxy systems Polyurethane systems Compared properties Viscosity Exothermic reaction Chemical resistance
- 3. Advanced Materials 3 Epoxy systems Chemistry Main features and benefits !! Ambient and hot curing systems !! Long pot life, latency !! Excellent cross linking !! Excellent impregnation !! High voltage behavior on impregnated parts !! High Tg !! Thermal endurance, high temperature applications !! Long-term reliability < Table of content Polyurethane systems > Compared properties >Epoxy systems >
- 4. Advanced Materials 4 Polyurethane systems Chemistry Main features and benefits !! Flammability resistance !! Low viscosity and easy processing !! Low exothermic reaction and low shrinkage !! Reactivity can be easily adjusted !! Flexibility at medium and low temperatures !! Suitable for pressure sensitive devices !! Crack resistance !! Thermal cycling !! Casting of big volumes !! Good adhesion !! Lower cost of materials < Table of content Polyurethane systems > Compared properties >Epoxy systems >
- 5. Advanced Materials 5 Compared viscosity Viscosity progression < Table of content Polyurethane systems > Compared properties >Epoxy systems >
- 6. Advanced Materials 6 Compared viscosity Epoxy resins !! Higher viscosity ca. 10 000 - 16 000 mPa.s !! Reduction of viscosity through reactive diluents or plastisizer PU systems !! Much lower viscosity of polyols << 10 000 mPa.s !! Low viscosity of standard MDI < 250 mPa.s !! Further dilution not required in most cases !! Low mix viscosity with excellent flowability < Table of content Polyurethane systems > Compared properties >Epoxy systems >
- 7. Advanced Materials 7 Compared exothermic reaction Exotherm progression < Table of content Polyurethane systems > Compared properties >Epoxy systems >
- 8. Advanced Materials 8 Compared exothermic reaction General rule for epoxy and polyurethane !! Exotherm of PU << EP systems !! Unfilled systems show stronger exothermic reaction !! Pot life of bigger quantities of reaction mix is lower !! Casting of big volumes preferably with PU !! PU’s are less sensitive towards crack formation !! The use of PU prepolymers provides additional reduction of the exotherm !! Exothermic reaction has an impact on shrinkage < Table of content Polyurethane systems > Compared properties >Epoxy systems >
- 9. Advanced Materials 9 Compared chemical resistance Depends on !! Building blocks !! Crosslinking density and degree of conversion !! Hard systems show a better resistance than soft systems General rule for epoxy and polyurethane !! Concentrated acid and base destroy the material !! Polar solvents damage the material !! Good resistance against diluted acid and bases, apolar solvents and fuel !! Aromatic solvents cause swelling of the material < Table of content Polyurethane systems > Compared properties >Epoxy systems >
- 10. Advanced Materials 10 Keep our products at your fingertips Download our mobile apps on your smartphone With these apps select immediately the right: !!Araldite® industrial adhesive for your specific need !!Araldite® composite formulated system for your process / application Access the product description or send us an email to request the technical data sheet. Araldite® - Adhesives (Europe) Download on iPhone | Android Huntsman - Composite resins (Europe) Download on iPhone | Android View the brochure on SlideShare With this brochure get an overview of our comprehensive range of insulation systems for electronics applications.
- 11. Advanced Materials 11 For more information www.huntsman.com/advanced_materials advanced_materials@huntsman.com Europe Huntsman Advanced Materials (Switzerland) GmbH Klybeckstrasse 200 P.O. Box - 4002 Basel Switzerland Tel. +41 61 299 20 41 Fax +41 61 299 20 40
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