Synergistic mixtures of uv-absorbers in polyolefins

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

C - Chemistry, Metallurgy

08

K

C08K 5/3475 (2006.01) C08K 5/132 (2006.01) C08K 5/18 (2006.01) C08K 5/20 (2006.01) C08K 5/34 (2006.01) C08K 5/3435 (2006.01) C08K 5/3492 (2006.01)

Patent

CA 2342679

The present invention relates to polyolefin compositions which comprise as UV absorber a synergistic mixture of a) 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 present c) 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- hydroxyphenyl- triazine; or h) at least one 2-hydroxyphenylbenzotriazole, at least one oxanilide and at least one 2-hydroxy phenyltriazine.

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