Gamma radiation rsistant polycarbonate compositions

Details Gamma radiation rsistant polycarbonate compositions Gamma radiation rsistant polycarbonate compositions

1989-04-25

1989-10-10

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524292, 524299, 524306, 524308, C08K 510

Patent

active

048732710

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.

REFERENCES:
patent: 4431497 (1984-02-01), Rekers
patent: 4451641 (1984-05-01), Sublett et al.
patent: 4460445 (1984-07-01), Rekers
patent: 4624972 (1986-11-01), Nace
patent: 4657949 (1987-04-01), Nace
patent: 4804692 (1989-02-01), Lundy et al.

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