Synthetic resin
Synthetic resins are industrially produced resins, typically viscous substances that convert into rigid polymers by the process of curing. In order to undergo curing, resins typically contain reactive end groups,[2] such as acrylates or epoxides. Some synthetic resins have properties similar to natural plant resins, but many do not.[3]
Synthetic resins are of several classes. Some are manufactured by
Types
The classic variety is
Synthetic casting "resin" for embedding display objects in Plexiglas/Lucite (PMMA) is simply methyl methacrylate liquid, into which a polymerization catalyst is added and mixed, causing it to "set" (polymerize). The polymerization creates a block of PMMA plastic ("acrylic glass") which holds the display object inside a transparent block.
Another synthetic polymer, sometimes called by the same general category, is
Solvent impregnated resins (SIRs) are porous resin particles which contain an additional liquid extractant inside the porous matrix. The contained extractant is supposed to enhance the capacity of the resin particles.
A large category of resins, which constitutes 75% of resins used,[
The production of
Silicone resins
Silicone resins are silicone-based polymers that exhibit various useful properties like weatherability (durability), dielectricity, water repellency, thermal stability, and chemical inertness.[6]
Health hazards
Health hazards potentially associated with synthetic resins are typically less of a concern than the hazards associated with the cured products, which are more commonly in contact with consumers. Issues of interest include the effects of unconsumed monomers, oligomers, and solvent carriers.
Dental restorative materials based on bis-GMA-containing resins[7] can break down into or be contaminated with the related compound bisphenol A, a potential endocrine disruptor. However, no negative health effects of bis-GMA use in dental resins have been found.[8][9]
See also
References
- ISBN 978-3527306732.
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- ISBN 978-3527306732.
- ^ Gurit Services AG. "5.1.3 Epoxy Resins". Guide to Composites (PDF). p. 19. Retrieved 2022-10-21.
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ignored (help) - ISBN 978-3527306732.
- ^ Silicone resins, shinetsusilicone
- ISBN 978-3527306732.
- PMID 10036843.
- PMID 28759120.