Patent ID: 7759417

Claim:
A stabilizer composition, comprising: (a) a hindered arylalkyl phosphite of the formula (II), wherein R 11 and R 15 together comprise at least 5 carbons and at least one of R 11 and R 15 comprises a tertiary carbon; wherein R 11 , R 12 , R 13 , R 14 , R 15 , X and Y are each individually selected from hydrogen, C 1 -C 12 alkyl, C 3 -C 12 cycloalkyl, C 4 -C 12 alkyl cycloalkyl, C 6 -C 10 aryl, and C 7 -C 12 alkylaryl; (b) a trisarylphosphite of the formula (III), wherein R 16 , R 17 , R 18 , R 19 , and R 20 are each individually selected from hydrogen, C 1 -C 20 alkyl, C 3 -C 20 cycloalkyl, C 4 -C 20 alkyl cycloalkyl, C 6 -C 10 aryl, and C 7 -C 20 alkylaryl; and (c) a hindered phenol comprising a molecular fragment selected from formulas (IVa), (IVb) and (IVc), wherein R 21 is selected from hydrogen and C 1-3 alkyl; and wherein R 22 and R 23 are each individually selected from hydrogen, C 1 -C 20 alkyl, C 3 -C 20 cycloalkyl, C 4 -C 20 alkyl cycloalkyl, C 6 -C 10 aryl, and C 7 -C 20 alkylaryl.