Patent ID: 6770693
Filing Date: 2004-08-03
Classification: C08K

Abstract:
A composition comprising:a polyolefin selected from the group consisting of polyethylene and polypropylene; bis-(2,4-dicumylphenyl) pentaerythritol diphosphite; at least one additional phosphite selected from the group consisting of tris-(2,4-di-t-butylphenyl)phosphite, bis-(2,4-di-t-butylphenyl)pentaerythritol diphosphite, and 2-butyl-2-ethyl-1,3-propanediol 2,4,6-tri-t-butylphenol phosphite, wherein the weight ratio of said bis-(2,4-dicumylphenyl) pentaerythritol diphosphite to said at least one additional phosphite is in a range of from about 10:1 to about 1:10; and tetrakis [methylene(3,5-di-t-butyl-4-hydroxyhydrocinnamate)]methane, wherein the weight of said bis-(2,4-dicumylphenyl) pentaerythritol diphosphite to said at least one additional phosphite is in a range of from about 10:1 to about 1:10; and the ratio of said total phosphite weight to the weight of said tetrakis [methylene(3,5-di-t-butyl-4-hydroxyhydrocinnamate)]methane is from about 2:1 to about 1:1.