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Polyvinylbutyral films which contain plasticizer and have a reduced adhesive power on glass

  • US 4,533,601 A
  • Filed: 01/31/1984
  • Issued: 08/06/1985
  • Est. Priority Date: 01/31/1983
  • Status: Expired due to Fees
First Claim
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1. A method of reducing adhesion to glass of a thermoplastic polyvinylbutyral molding composition, which contains plasticizer and in which the polyvinylbutyral component contains 21-28% by weight of vinyl alcohol units (based on the polyvinylbutyral), by mixing constituents of the molding composition with an anti-adhesive agent combination of(a) potassium hydroxide, potassium formate or potassium acetate in an amount corresponding to an alkali titer of between 10 and 200 (based on the polyvinylbutyral) and(b) 0.005 to 0.5% by weight (based on the polyvinylbutyral) of a compound having a betaine structure.

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