UV-light stabilized polyoxymethylene molding compositions

Details UV-light stabilized polyoxymethylene molding compositions UV-light stabilized polyoxymethylene molding compositions

1988-11-10

1991-02-26

Morgan, Kriellion

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524100, 524101, 524102, C08K 53477, C08K 53492

Patent

active

049962531

ABSTRACT:
A polyoxymethylene composition which exhibits improved stability against the degradative effects of ultraviolet light includes a triazine-based antioxidant and UV stabilizers. One preferred composition of the invention includes, based upon the total weight of the composition, an oxymethylene copolymer, between 0.015 to about 0.4 weight percent of 2,4,6-triamino-sym-triazine (as a formaldehyde scavenger), between about 0.25 to about 1.0 weight percent of each of 2-2(hydroxy-5-t-octylphenyl) benzotriazole, and bis(2,2,6,6-tetramethyl-4-piperidinyl)sebacate as UV light stabilizers, and between about 0.25 to about 1.0 weight percent of 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid triester with 1,3,5-tris(2-hydroxy-ethyl)-s-triazine-2,4,6-(1H, 3H, 5H)-trione as an antioxidant. Due to their enchanced UV-light stability property, the compositions of the invention find particular utility as molded automobile components.

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