abstract |
The present invention relates to polyolefin compositions which, as UV absorbers, comprise a synergistic mixture of DOLLAR A a) at least one hydroxybenzophenone and at least one 2-hydroxyphenylbenzotriazole, with the proviso that the polyolefin is a high-density "Phillips" type polyethylene or a polyethylene from Is metallocene type; DOLLAR A b) at least one hydroxybenzophenone and at least one 2-hydroxyphenyltriazine, with the proviso that if the polyolefin is polypropylene, there is no polyvinylpyridine; DOLLAR A c) at least one hydroxybenzophenone and at least one oxanilide; DOLLAR A d) at least one 2-hydroxyphenylbenzotriazole and at least one oxanilide; DOLLAR A e) at least one 2-hydroxyphenyltriazine and at least one oxanilide; DOLLAR A f) at least one hydroxybenzophenone, at least one 2-hydroxyphenylbenzotriazole and at least one oxanilide; DOLLAR A g) at least one hydroxybenzophenone, at least one oxanilide and at least one 2-hydroxyphenyltriazine; or DOLLAR A h) at least one 2-hydroxyphenylbenzotriazole, at least one oxanilide and at least one 2-hydroxyphenyltriazine. |