Patent ID: 8048946

Claim:
A composition comprising: (a) a mixture of phosphites which mixture is a liquid at ambient conditions and consists essentially of (i) a tris(monoalkylaryl)phosphite in an amount from 20 to 70 wt %; (ii) a bis(monoalkylaryl)dialkylaryl phosphite in an amount from 15 to 60 wt %, (iii) a tris(dialkvlaryl)phosphite in an amount of from 0.1 to 20 wt %; and (iv) a bis(dialkylaryl)monoaryl phosphite in an amount of from 2 to 20 wt % and (b) an amine having the structure: wherein x is 1, 2 or 3; R1 is selected from the group consisting of hydrogen, and straight or branched C1-C6 alkyl, and R2 is selected frorn the group consisting of straight or branched C1-C30 alkyl, wherein the phosphites each independently have the structure: wherein R 3 , R 4 and R 5 are independently selected alkylated aryl groups of the structure: wherein R 6 , R 7 , and R 8 are independently selected from the group consisting of hydrogen and straight or branched C 4 -C 5 alkyl, provided that at least one of R 6 , R 7 , and R 8 is not hydrogen.