Patent ID: 7135511

Claim:
A composition formed by combining components comprising: a) a polyolefin; b) a first phosphite, which is an arylalkyl diphosphite having a formula, wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , and R 10 can be the same or different and are selected from hydrogen or straight-chained or branched, cyclic or acyclic, aromatic or aliphatic, and mixed aliphatic, aromatic, and/or cycloaliphatic organic radicals having from about 1 to about 20 carbon atoms per radical; c) a second phosphite selected from: (i) a second arylalkyl diphosphite of formula (I), wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , and R 10 can be the same or different and are selected from hydrogen or straight-chained or branched, cyclic or acyclic, aromatic or aliphatic, and mixed aliphatic, aromatic, and/or cycloaliphatic organic radicals having from about 1 to about 20 carbon atoms per radical, which is different from the first arylalkyl diphosphite or (ii) a triarylphosphite having a formula, wherein R 1 , R 2 , R 3 , R 4 , and R 5 , are selected from hydrogen or straight-chained or branched, cyclic or acyclic, aromatic or aliphatic, and mixed aliphatic, aromatic, and/or cycloaliphatic organic radicals having from about 1 to about 20 carbon atoms per radical; d) a hindered phenol; and e) water, wherein the second phosphite is present in the composition in an amount sufficient to raise the Phillips Polyethylene Color Number (PE) to a value greater than the PE of a composition formed by combining like amounts of the polyolefin, the first phosphate, the hindered phenol, and water, and wherein the second phosphite replaces at least a portion of the first phosphite.