Weatherable block copolyestercarbonate compositions
US6583256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2001 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Jan 3, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B61/045
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Block copolyestercarbonates may be prepared by first conducting a reaction between at least one of resorcinol or an alkyl- or haloresorcinol and at least one aromatic dicarboxylic acid dichloride, preferably isophthaloyl dichloride, terephthaloyl dichloride or a mixture thereof, to produce a hydroxy-terminated polyester intermediate, and then conducting a reaction of the intermediate with a carbonate precursor, preferably in the presence of a dihydroxy compound such as bisphenol A. The products have excellent physical properties, including a high degree of weatherability. They may be blended with other polymers such as polycarbonates, poly(alkylene dicarboxylates), polyarylates, polyetherimides, and addition polymers to improve the weatherability thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.