Patent attributes
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.
