Patent ID: 8258215

Claim:
A process to stabilize a polymer comprising the step of adding a phosphite of formula (I), said phosphite having less estrogenic activity when compared to polymer blends which use tris(nonylphenyl) phosphite: wherein R 1 is independently selected from the group consisting of H and C 1-2 alkyls; R 2 is independently selected from the group defined previously for R 1 ; x is an integral value ranging from 0 to 4 inclusive; y is an integral value ranging from 0 to 4 inclusive; n is an integral value ranging from 1 to 2; R 3 is independently selected from the group consisting of C 12-20 alkyl or C 12-20 alkenyl; R 4 is independently selected from the group consisting of C 1-10 ; alkyl and C 9-15 arylalkyl; R 5 is independently selected from the group defined previously for R 4 .