Polycarbonate compositions resistant to gamma radiation

Details Polycarbonate compositions resistant to gamma radiation Polycarbonate compositions resistant to gamma radiation

1991-11-06

1993-02-16

Buttner, David J.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524281, 524373, 524611, 525403, 525462, 525470, 528202, 558266, 558268, C08L 6900, C08G 6542, C08G 6416

Patent

active

051872080

ABSTRACT:
A thermoplastic polycarbonate molding composition resistant to gamma-radiation is disclosed. The composition incorporates about 0.05 to 5.0 percent by weight of and end-capped poly(alkyl oxide) conforming to ##STR1## where hal denotes bromine or chlorine, n is about 10 to 40 and x is 1 to 5.
The composition was found to be resistant to the yellowing which characterized polycarbonate compositions upon exposure to gamma radiation. The composition of the invention not only has low initial color change upon exposure but also a small change in yellowness after long term storing.

REFERENCES:
patent: 3148203 (1964-09-01), Schisla
patent: 4451641 (1984-05-01), Sublett et al.
patent: 4460445 (1984-07-01), Rekers
patent: 4624972 (1986-11-01), Nace
patent: 4873271 (1989-10-01), Lundy et al.

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