What Does Resinous Material Mean?
Resinous materials are materials that contain resin, a yellow or
brown sticky substance produced by plants or an artificial substance that is similar to natural resin.
Resins are valuable for their
chemical properties and associated uses, such as the production of varnishes,
adhesives, food glazing agents, plastics and various products.
Corrosionpedia Explains Resinous Material
Resins are any natural or synthetic organic compound consisting of a non-crystalline or viscous liquid substance. There are two types:
- Natural resins - Fusible and flammable organic substances. They are transparent or translucent and are yellowish to brown in color. Such resins are soluble in all types of organic liquids. These resins are formed by plant secretions.
- Synthetic resins - Synthetic resinous products that are chemically different but possess similar physical properties.
Resins are divided into two classes:
- Thermoplastic resins - Remain plastic after heat treatment.
- Thermosetting resins - Become insoluble and infusible when heated.
Resinous products are widely used in industrial applications. Natural resins have been almost completely replaced by synthetic resins.
Hard transparent resins such as the copals, mastic, dammars and sandarac are primarily used to produce varnishes and adhesives, whereas the softer odoriferous oleo resins such as turpentine and copaiba along with gum resins containing essential oils such as ammoniacum, myrrh and scammony are largely used for therapeutic purposes and incense.