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US 5,308,900 AGranted
Polyethylene compositions
AssigneePhillips Petroleum Company
InventorKenneth W. Willcox
Life of this patent
Estimating the term…
Abstract
A polyethylene composition that resists changing color when subjected to ultraviolet light said polyethylene composition comprises: (a) bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, in an amount that is at least about 0.001 parts but less than 0.30 parts per 100 parts by weight of said polyethylene; and (b) zinc stearate, in an amount that is from about 0.1 part 1 part per 100 parts by weight, of said polyethylene.
Claims7
A polyethylene composition comprising:
- (a) bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, in an amount that is at least about 0.001 parts but less than 0.3 parts per 100 parts by weight of said polyethylene;
- and
- (b) zinc stearate, in an amount that is from about 0.01 parts to 1 part per 100 parts by weight of said polyethylene.
Dependencies are inferred from the claim text.