Patent ID: 8563637

Claim:
An alkylphenol-free liquid polymeric polyphosphite which comprises: wherein each R 1 , R 2 , R 3 and R 4 can be the same or different and independently selected from the group consisting of C 12-20 alkyl, C 12-22 alkenyl, C 12-40 cycloalkyl, C 12-40 cycloalkylene, C 12-20 methoxy alkyl glycol ethers, and Y—OH as an end-capping group; each Y is independently selected from the group consisting of C 1-20 alkyl, C 6-40 cycloalkyl, C 7-40 cycloalkylene, C 3-20 alkyl glycol ethers, C 2-40 alkylene, C 3-40 alkyl lactone, and —R 7 —N(R 8 )—R 9 —; R 7 , R 8 and R 9 are independently selected from the group consisting of C 1-20 alkyl, C 2-22 alkenyl, C 6-40 cycloalkyl, C 7-40 cycloalkylene and H; m is an integral value ranging from 2 to 100 inclusive; and x is an integral value ranging from 1 to 1,000, and further wherein said polymeric polyphosphite is a reaction product of: at least one monohydroxy-terminated reactant selected from the group consisting of R 1 —OH, R 2 —OH, R 3 —OH and R 4 —OH; and at least one dihydroxy-terminated reactant selected from the group HO—Y—OH, and a trifunctional reactant comprising at least one phosphorus moiety, said polymeric polyphosphite having less terminal hydroxy groups than said reaction product formed using dihydroxy-terminated reactants.