Stabilized olefin polymers
AssigneeBorg-Warner Chemicals, Inc.
InventorsLeo L. Valdiserri, Elyse M. Bullock
Life of this patent
Estimating the term…
Abstract
An olefin polymer composition containing a cyclic, hindered amine in combination with an organic phosphite ester. The composition is relatively stable in the presence of ultraviolet light.
Claims20
A polymer composition comprising an olefin polymer in combination with each of (a) from about 0.3 to about 0.4 percent of a five-membered nitrogen ring compound having the structure AOCOR, ACOOR, or ACONHR' where A is a 2,2,5,5-tetraalkyl pyrrolidine or pyrroline wherein the alkyl groups are lower alkyl, R is alkyl, alkOCOA or alkCOOA where alk is an alkylene residue of a dicarboxylic or dihydroxy compound, and R' is alkyl or alkNHCOA;
- or a salt thereof, and (b) from about 0.05 to about 0.1 percent of an organic phosphite ester.
A stabilizer composition effective in small proportions to inhibit the deterioration of olefin polymers in the presence of ultraviolet light comprising in combination (a) from about 0.3 to about 0.4 parts of a five-membered nitrogen ring compound having the structure AOCOR, ACOOR, or ACONHR' where A is a 2,2,5,5-tetraalkyl pyrrolidine or pyrroline wherein the alkyl groups are lower alkyl, R is alkyl, alkOCOA or alkCOOA where alk is an alkylene residue of a dicarboxylic or dihydroxy compound, and R' is alkyl or alkNHCOA;
- or a salt thereof, and (b) from about 0.05 to about 0.1 part of an organic phosphite ester.
Dependencies are inferred from the claim text.