Stabilized polymeric article and method of producing
AssigneeAlliedSignal Inc.
InventorsRobert C. Wincklhofer, Gene C. Weedon, Robert M. Marshall, Kimon C. Dardoufas
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Abstract
A heat and oxidation stabilized polymeric article, preferably fiber or film, is prepared by applying to the article a composition which comprises effective amounts of a nitrogen-containing antioxidant and a compatible carrier. When the composition is applied as a process finish, the carrier is a lubricant which is the reaction product of an alkylene oxide with a compound selected from the group consisting of a fatty acid having about 5 to 36 carbon atoms and an alcohol having about 5 to 36 carbon atoms, with the number of moles of alkylene oxide per mole of acid or alcohol ranging from 2 to 20. The stabilized article has utility in high performance applications.
Claims20
A method of producing a stabilized article made from a polyethylene having a weight average molecular weight of at least 150,000, wherein said polyethylene is dissolved in solution prior to formation of said articles and then subjected to solvent extraction, the method comprising, subsequent to said solvent extraction, applying to the article an amount effective to improve breaking strength of said article of a composition comprising a nitrogen-containing antioxidant and a compatible carrier for said antioxidant, said antioxidant being selected from the group consisting of hindered amines and benzotriazoles and said carrier comprising a lubricant which is the reaction product of an alkylene oxide with a compound selected from the group consisting of a fatty acid having about 5 to 36 carbon atoms and an alcohol having about 5 to 36 carbon atoms, the number of moles of said alkylene oxide per mole of said compound being from about 2 to 20.
A polyethylene fiber having a weight average molecular weight of at least 150,000 which has been dissolved in solution and then subjected to solvent extraction and is stabilized with a nitrogen-containing antioxidant selected from the group consisting of hindered amines and benzotriazoles which have been applied to said fiber subsequent to said solvent extraction by application of said antioxidant in a compatible carrier to said fiber, said carrier comprising a lubricant which is the reaction product of an alkylene oxide with a compound selected from the group consisting of a fatty acid having about 5 to 36 carbon atoms and an alcohol having about 5 to 36 carbon atoms, the number of moles of said alkylene oxide per mole of said compound being from about 2 to 20.
Dependencies are inferred from the claim text.