Polycarbonate resin composition useful in optical applications
US4670479A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 1986 |
| Grant date | Jun 2, 1987 |
| Priority date | — |
| Expiry date | Aug 1, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polycarbonate resin composition comprising a blended mixture of PA0 (A) a polycarbonate resin having a viscosity average molecular weight of from about 13,000 to about 18,000, PA0 (B) 0.0001 to less than 0.02% by weight, based on the weight of the resin (A), of an organic phosphine, and PA0 (C) 0 to 0.5% by weight, based on the weight of the resin (A), of a partial ester of a monobasic fatty acid having 10 to 22 carbon atoms with a polyhydric alcohol having 2 to 10 carbon atoms, the amount of the partial ester (C) being 0.01 to 0.5% by weight when the amount of the organic phosphine (B) is not less than 0.005% by weight, and said composition containing less than 0.004%, based on the weight of the resin (A), of chlorine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.