Silicone-polycarbonate block copolymers and polycarbonate blends having reduced haze, and method for making
US5530083A · kind A · utility
91Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1994 |
| Grant date | Jun 25, 1996 |
| Priority date | — |
| Expiry date | Jul 21, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L69/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method is provided for making silicone polycarbonate block copolymers and polycarbonate blends thereof having reduced haze. Silicone polycarbonate block copolymer formation is effected by using a phase transfer catalyst to generate polycarbonate oligomers having at least one terminal haloformate group followed by the late addition of hydroxyaryl terminated polydiorganosiloxane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.