UV-Stabilization of oxymethylene copolymers

Details UV-Stabilization of oxymethylene copolymers UV-Stabilization of oxymethylene copolymers

1982-12-28

1984-05-01

Kight, III, John

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524102, 524291, 524343, 524359, C08K 534, C08K 548, C08K 513

Patent

active

044462638

ABSTRACT:
An improved molding composition is provided which exhibits desirable weathering resistance and UV stability comprising an oxymethylene copolymer having at least one chain containing from about 85 to 99.6 mole percent of oxymethylene units interspersed with about 0.4 to 15 mole percent of oxyethylene units, about 0.1 to 1 percent by weight of 1,6-hexamethylene bis-(3,5-di-tert-butyl)-4 hydroxy hydrocinnamate, about 0.015 to 0.4 percent by weight of 2,4,6-triamino-symtriazine, about 0.1 to 0.75 percent by weight of bis(1,2,2,6,6-pentamethyl-4-piperidinyl) ((3,5-bis(1,1-dimethylethyl-4-hydroxyphenol)methyl)) butyl propanedioate and about 0.25 to 1.0 percent by weight of 2-hydroxy-4-n-octoxy-benzophenone.

REFERENCES:
patent: 3219621 (1965-11-01), Prichard
patent: 4342680 (1982-08-01), Sugio et al.

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