High heat polycarbonate compositions, methods for the preparation thereof, and articles derived therefrom
US7491788B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2006 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Feb 16, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L69/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Melt blended compositions, comprising up to 20 wt % of an optional additive, and 80-100 wt % of a copolycarbonate having a Tg of 200° C. or more of (1)wherein the mole ratio of x:y is 35:65 to 90:10, R1 is derived from a dihydroxy compound (2)wherein R3 and R5 are each independently a halogen or a C1-6 alkyl group, R4 is a C1-6 alkyl, phenyl, or phenyl substituted with up to five halogens or C1-6 alkyl groups, and each c is independently 0 to 4; R2 is derived from a dihydroxy compound (6):wherein Ra and Rb are each independently a halogen atom or a monovalent C1-6 alkyl group; p and q are each independently integers of 0 to 4; and Xa is a divalent group; and 95 to 5 wt % of a polycarbonate having a Tg of less than 200° C. of formula (9)wherein R9 derived from a dihydroxy compound of formula (6); and 0.001 to 0.1 wt % of a transesterification catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.