Method for preventing plasticizer bleeding on polyvinyl chloride shaped articles

Abstract

A novel method is proposed for preventing bleeding of plasticizers on the surface of shaped articles of plasticized polyvinyl chloride resins. The method comprises blending a limited amount of an organosilane compound represented by the general formula CH.sub.2 .dbd.CR.sup.1 --CO--O--CH.sub.2).sub.a Si(R.sup.2).sub.b (OR.sup.3).sub.3-b in which R.sup.1 and R.sup.3 are each a hydrogen atom or an alkyl group, R.sup.2 is a monovalent hydrocarbon group, a is an integer from 1 to 6 and b is a number of 0, 1 or 2 with the polyvinyl chloride resin prior to fabrication of the resin into shaped articles, fabricating the resin admixed with the organosilane compound into a desired shaped article, and subjecting the shaped article to a treatment with low temperature plasma of a gas. Carbon monoxide is preferred as the gas for plasma atmosphere.

Dependencies are inferred from the claim text.