Stabilization of vinyl resins

Details Stabilization of vinyl resins Stabilization of vinyl resins

C - Chemistry, Metallurgy

08

L

400/9385

C08L 27/06 (2006.01) C08K 5/34 (2006.01) C08L 57/00 (2006.01)

Patent

CA 1094726

ABSTRACT OF THE DISCLOSURE: Synthetic compositions based on vinyl polymers or copolymers are stabilized against degradation by heat and light by the incorporation therein of a 1,4-dihydropyridine derivative represented by the general formula: Image wherein R represents an alkyl radical containing from 1 to 22 carbon atoms, an octadecenyl radical, a cyclohexyl radical, a phenyl radical or a phenyl radical substituted by a halogen atom or methyl or methoxy radical. The stabi- lisher can be present in an amount of from 0.01 to 0.5 per- cent by weight, advantageously less than 0.2 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.

316979

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