Copolycarbonate having improved low-temperature impact strength
US5414054A · kind A · utility
14Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1994 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Jun 1, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/186
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A thermoplastic copolycarbonate resin having improved low temperature impact strength and a process for the preparation of the resin are disclosed. Accordingly the structure of the copolycarbonate contains PA0 (i) units of the formula ##STR1## wherein D is a divalent residue of a dihydroxy compound, and (ii) units of the formula ##STR2## wherein m is 1-90, n is 5-300, R is an alkyl or a phenyl radical p is 2-12 and q is 2-20. The preparation of the copolycarbonate entails reactive blending of polycarbonate with a suitable lactone siloxane copolymer in the presence of a transesterification catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.