![• In polymer chemistry and materials science, resin is a "solid or
highly viscous substance" of plant or synthetic origin that is
typically convertible into polymers.[1] They are often mixtures
of organic compounds, principally terpenes. Many plants,
particularly woody plants, produce resin in response to injury.
The resin acts as a bandage protecting the plant from invading
insects and pathogens](https://image.slidesharecdn.com/whatareresins-190216171039/85/What-are-resins-2-320.jpg)
What are resins
- 2. • In polymer chemistry and materials science, resin is a "solid or highly viscous substance" of plant or synthetic origin that is typically convertible into polymers.[1] They are often mixtures of organic compounds, principally terpenes. Many plants, particularly woody plants, produce resin in response to injury. The resin acts as a bandage protecting the plant from invading insects and pathogens
- 3. Physical properties: • Resins are transparent or translucent. • Resins are mostly heavier than water. • Resins are insoluble in water. • Resins are soluble in solvents like alcohol, volatile oils, fixed oils, organic solvents, non polar solvents. • Resins are substances with a hard texture. • Resins are electrically non-conductive. • Resins get softened upon heating and undergo melting
- 4. Chemical properties: • Resins consist of schizogeneous or schizolysegeneous cavities and ducts in their chemical moieties. • Resins are also composed of esters.
- 5. CLASSIFICATION OF RESINS • Resins are divided into three major classes, namely: • Acid resins • Ester resins • Resin alcohols
- 6. • ACID RESINS • Those resins which consist of acidic moieties as their main chemical constituents are known as acidic resins. • Examples of acidic resins: Colophony, Myrrh, Shellac, Sandrac. • ESTER RESINS • Those resins which consist of ester as their chief chemical constituents are known as ester resins. • Examples of ester resins: Benzoin, Storax.
- 7. • RESIN ALCOHOLS • Those resins which consist of complex alcoholic groups of high molecular weights are known a resin alcohol. • Examples of resin alcohols: Canada balsam, Guggul, Capsicum, Asafoetida.
- 8. ISOLATION OF RESINS • Resins are isolated from plants by vivid technologies and methodologies completely depending on the chemical nature possessed by them. • By extraction with alcohol and precipitation with water. • Examples: Podopyllum, Hypomia • By distillation for separation of oils. • Examples: Copaiba, Colophony. • By heating the plant parts. • Example: Guaiacum. • Isolation of plant exudates by incision. • Examples: Myrrh, Asafetida, • Isolation by processing encrustation. • Examples: Shellac.
- 9. Medicinal uses of resins: • Carminatives • Examples: Ginger, Asafetida, Capsicum. • Stomachics • Examples: Capsicum, Ginger. • Anti-inflammatory agents • Examples: Turmeric, Guggul. • Anti-rheumatic agents
- 10. • Examples: Guggul, Capsicum. • Antiseptic agents • Examples: Tolubalsam, Myrrh. • Flavoring agents/spices /condiments • Examples: Ginger, Turmeric, Tolubalsam, Perubalsam. • Cathartic • Example: Kaladana.