Plasticizer-containing films of partially acetalized polyvinyl alcohols

US4361625A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Rolf Beckmann · Siegburg, DE
• Wilhelm Knackstedt · Troisdorf, DE

Key dates

• Filing date: May 10, 1979
• Grant date: Nov 30, 1982
• Expiry date: May 10, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31942
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A plasticizer-containing film of a partially acetalized polyvinyl alcohol resin contains as the plasticizer a mixture of an ester of an organic cyclic acid and/or a conventional acetal plasticizer for said resin, and an ester of an oxygen acid of phosphorus.