Ultraviolet stabilizer for polycarbonate compositions

Details Ultraviolet stabilizer for polycarbonate compositions Ultraviolet stabilizer for polycarbonate compositions

1991-01-07

1992-02-04

Hoke, Veronica P.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

548259, C08K 527

Patent

active

050860976

ABSTRACT:
A thermoplastic molding composition comprising a polycarbonate resin and a benzotriazole ortho carbonate having an improved level of resistance to deterioration caused by exposure to ultraviolet radiation is disclosed. The ultraviolet stabilizer of the invention conforms to ##STR1## wherein R.sub.1 denotes a hydrogen or a halogen atom or a C.sub.1-4 alkyl or alkoxy group,

REFERENCES:
patent: 3004896 (1961-10-01), Heller et al.
patent: 3579561 (1971-05-01), Meltsner
patent: 4104217 (1978-08-01), Leistner et al.
patent: 4128559 (1978-12-01), Pond et al.
patent: 4230857 (1980-10-01), Drake et al.

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