| abstract |
New bis-cyclic phosphite compounds have the formula (I), wherein each R1 is independently selected from the group consisting of hydrogen, alkyl, aralkyl, aryl, carboxyl, alkoxycarbonyl or halogen; each R2 is independently selected from the group consisting of hydrogen, alkyl, aralkyl, alkoxyl, aryl, carboxyl, alkoxycarbonyl or halogen; each R3 and R4 represents alkyl; and A is 1,3-phenylene or 1,4-phenylene. The invention also relates to synthetic polymeric materials stabilized with one or more of these compounds. |