The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 1980
Filed:
Oct. 12, 1978
Charles Pigerol, Saint-Ouen, FR;
Marie-Madeleine Chandavoine, Sisteron, FR;
Paul de Cointet Fillain, Sisteron, FR;
Labaz, Paris, FR;
Abstract
Synthetic resin compositions based on vinyl polymers or copolymers are stabilized against degradation by both heat and light by the incorporation therein of a 1,4-dihydropyridine derivative represented by the general formula: ##STR1## wherein R represents a straight or branched-chain saturated or unsaturated alkyl radical containing from 9 to 22 carbon atoms. The stabilizer can be present in an amount of from 0.01 to 0.5 percent by weight, based on the vinyl resin. The vinyl resin may be, for example, polyvinyl chloride, a vinyl chloride-vinyl acetate copolymer or a vinyl chloride-vinylidene chloride copolymer. The stabilized vinyl resins can be used in the manufacture of food packaging materials and containers and also of flooring tiles and recording discs. Some of the dihydropyridine derivatives are novel compounds.