Process for plasticizing polyvinyl alcohol

Abstract

Abstract 1410744 Plasticizing polyvinyl alcohol HOECHST AG 10 Jan 1974 [20 Jan 1973] 01181/74 Heading C3P Polyvinyl alcohol is plasticized by mixing a polyvinyl alcohol gel containing methanol, with a plasticizer, and subsequently removing the methanol. Methanol containing PVA gels may be obtained by the methanolysis of polyvinylacetate, the separation of the formed methyl acetate therefrom, and then washing with methanol. The methanol content is preferably 40-85 wt. per cent. Plasticizers specified are glycerol, pentaerythritol, sorbitol, ethylene glycol, propylene glycol, butylene glycol, trimethylol propane or a polyethylene glycol having a molecular weight up to 400.

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