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polycarbonates |
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polycarbonates, group of clear, thermoplastic polymers polymer (pŏl`əmər) ..... Click the link for more information. used mainly as molding compounds (see plastic plastic, any organic material with the ability to flow into a desired shape when heat and pressure are applied to it and to retain the shape when they are withdrawn. ..... Click the link for more information. ). Polycarbonates are prepared by the reaction of an aromatic difunctional phenol with either phosgene or an aromatic or aliphatic carbonate. The commercially important polycarbonates use 2,2-bis (4-hydroxyphenol)-propane (bisphenol A) and diphenyl carbonate. This polymer is a clear plastic with a slight yellow discoloration. It has excellent electrical properties and a high impact strength. |
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Ravecarb diol polycarbonates are used for polyurethane coating and synthetic leather where high temperature and humidity resistance are required. Select colors for polycarbonates meet the requirements of the FDA-modified ISO 10933, Part I test for biocompatibility. Polycarbonates are made by joining BPA molecules into long chains. |
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polycarbonates
