Synergistic mixtures of UV-absorbers in polyolefins

Details Synergistic mixtures of UV-absorbers in polyolefins Synergistic mixtures of UV-absorbers in polyolefins

2005-07-12

2005-07-12

Yoon, Tae H. (Department: 1714)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S091000, C524S094000, C524S099000, C524S100000, C524S242000

Reexamination Certificate

active

06916867

ABSTRACT:
The present invention relates to polyolefin compositions which comprise as UV absorber a synergistic mixture ofa) at least one hydroxybenzophenone and at least one 2-hydroxyphenylbenzotriazole with the proviso that the polyolefin is a high density polyethylene of the “Phillips” type or a polyethylene of the metallocene type;b) at least one hydroxybenzophenone and at least one 2-hydroxyphenyltriazine, with the proviso that if the polyolefin is polypropylene, no polyvinylpyridin is presentc) at least one hydroxybenzophenone and at least one oxanilide;d) at least one 2-hydroxyphenylbenzotriazole and at least one oxanilide;e) at least one 2-hydroxyphenyltriazine and at least one oxanilide;f) at least one hydroxybenzophenone, at least one 2-hydroxyphenylbenzotriazole and at least one oxanilide;g) at least one hydroxybenzophenone, at least one oxanilide and at least one 2-hydroxyphenyltriazine; orh) at least one 2-hydroxyphenylbenzotriazole, at least one oxanilide and at least one 2-hydroxy phenyltriazine.

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