Gamma radiation rsistant polycarbonate compositions
US4873271A · kind A · utility
17Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1989 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | Apr 25, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/103
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to thermoplastic polycarbonate molding compositions which are rendered improved resistance to gamma-radiation by the incorporation therewith of about 0.05 to about 5.0 percent by weight of an ester of poly(alkylene)oxide conforming to ##STR1## wherein R is a C.sub.1 -C.sub.20 alkyl, aryl or alkylaryl, Y denotes a hydrogen atom or a C.sub.1 -C.sub.6 alkyl radical, and X is about 1 to 40, preferably 5 to 30. The compositions of the invention exhibit excellent resistance to yellowness and formation of haze which commonly characterize gamma irradiated articles molded from polycarbonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.