| 摘要 |
<p>Disclosed are novel bis-cyclic phosphite compounds having formula (I) wherein each R1 is independently selected from hydrogen, alkyl, aralkyl, aryl, carboxy, alkoxycarbonyl or halogen; each R2 is independently selected from hydrogen, alkyl, aralkyl, alkoxy, aryl, carboxy, alkoxycarbonyl or halogen; each R?3 and R4¿ is alkyl; and A is 1,3- or 1,4-phenylene. Also disclosed are synthetic polymeric materials stabilized with one or more of the above compounds.</p> |
