Process for stabilizing vinylidene chloride resins
AssigneeAsahi-Dow Limited
InventorsNobuaki Kuroshima, Koichi Mashiki
Life of this patent
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Abstract
A process for imparting heat and light stability to vinylidene chloride copolymer resins by adding thereto small amounts of Vitamin E, an alkyl ester of thiodipropionic acid having 12 to 18 carbon atoms in an alkyl group thereof and an alkali metal salt or an alkali earth metal salt of a phosphoric acid.
Claims10
A process for stabilizing a vinylidene chloride containing resin which comprises adding to 100 parts by weight of a vinylidene chloride copolymer from about 0.0005 to about 0.2 parts by weight per 100 parts by weight of the vinylidene chloride copolymer of Vitamin E, from about 0.0005 to about 0.2 parts by weight per 100 parts by weight of the vinylidene chloride copolymer of an alkyl ester of thiodipropionic acid having 12 to 18 carbon atoms in the alkyl groups thereof, and from about 0.0005 to about 0.2 parts by weight per 100 parts by weight of the vinylidene chloride copolymer of a phosphate selected from the group consisting of an alkali metal salt or an alkali earth metal salt of a phosphoric acid.
A process for stabilizing a vinylidene chloride containing resin which comprises adding to 100 parts by weight of a vinylidene chloride copolymer from about 0.001 to about 0.05 parts by weight per 100 parts by weight of the vinylidene chloride copolymer of Vitamin E, from about 0.001 to about 0.05 parts by weight per 100 parts by weight of the vinylidene chloride copolymer of an alkyl ester of thiodipropionic acid having 12 to 18 carbon atoms in the alkyl groups thereof, and from about 0.001 to about 0.05 parts by weight per 100 parts by weight of the vinylidene chloride copolymer of a phosphate selected from the group consisting of alkali metal salts and alkali earth metal salts of phosphoric acids.
A process for stabilizing a resin containing from about 60 to about 95 percent by weight of vinylidene chloride and from about 40 to about 5 percent by weight of vinyl chloride which comprises adding to 100 parts by weight of said resin from about 0.001 to about 0.05 parts by weight per 100 parts by weight of the resin of racemic-alpha-tocopherol, from about 0.001 to about 0.05 parts by weight per 100 parts by weight of the resin of dilauryl thiodipropionate and from about 0.001 to about 0.05 parts by weight per 100 parts by weight of the resin of sodium pyrophosphate.
Dependencies are inferred from the claim text.