| 摘要 |
<p num="1"><br/>The present invention relates to polyolefin compositions which comprise as UV <br/>absorber a <br/>synergistic mixture of<br/>a) at least one hydroxybenzophenone and at least one 2-<br/>hydroxyphenylbenzotriazole with the <br/>proviso that the polyolefin is a high density polyethylene of the "Phillips" <br/>type or a <br/>polyethylene of the metallocene type;<br/>b) at least one hydroxybenzophenone and at least one 2-hydroxyphenyltriazine, <br/>with the <br/>proviso that if the polyolefin is polypropylene, no polyvinylpyridin is <br/>present<br/>c) at least one hydroxybenzophenone and at least one oxanilide;<br/>d) at least one 2-hydroxyphenylbenzotriazole and at least one oxanilide;<br/>e) at least one 2-hydroxyphenyltriazine and at least one oxanilide;<br/>f) at least one hydroxybenzophenone, at least one 2-hydroxyphenylbenzotriazole <br/>and at least <br/>one oxanilide; <br/>g) at least one hydroxybenzophenone, at least one oxanilide and at least one 2-<br/>hydroxyphenyl-<br/>triazine; or<br/>h) at least one 2-hydroxyphenylbenzotriazole, at least one oxanilide and at <br/>least one 2-hydroxy <br/>phenyltriazine.<br/>
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