| 摘要 |
<p>Disclosed are bis-benzotriazolylphenol compounds having formula (I), wherein R?1 and R2¿ each is a 2-benzotriazolyl radical; R?3 and R4¿ each is hydrogen, alkyl, aralkyl, alkoxy, aryl, carboxy, alkoxycarbonyl or halogen; and A is 1,3- or 1,4-phenylene. Also disclosed are synthetic polymeric materials stabilized with one of the above compounds.</p> |
