Impact modified carbonnate polymer composition having improved resistance to degradation and improved thermal stability
US6545089B1 · kind B1 · utility
42Cited by
4References
24Claims
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Key dates
| Filing date | Sep 4, 1997 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Sep 4, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An aromatic carbonate polymer composition having improved thermal stability consisting of an aromatic carbonate polymer such as a polycarbonate or polycarbonate/polyester blend and an impact modifier which is free of alkali materials which catalytically degrade a polycarbonate. Also an impact modifier which is preferably of a shell-core structure prepared by the emulsion polymerization process and has a pH of about 3 to about 8. A preferred emulsifier is an alkyl sulfonate having an alkyl group of C6-C18 carbons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.