Self-curing composition based upon polymethylmethacrylate and process for manufacturing said self-curing composition

US4268639A · kind A · utility

Inventors

• Hartmut Seidel · Hamburg, DE
• Kurt Polzhofer · Schwentinental, DE

Key dates

• Filing date: Sep 19, 1979
• Grant date: May 19, 1981
• Expiry date: Sep 19, 1999

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61L24/06
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Self-curing compositions are prepared based on polymethyl methacrylate (PMMA) are by mixing a finely powdered solid polymer phase of PMMA and/or poly (2-hydroxyethyl methacrylate) (PHEMA) with a liquid monomer phase of methyl methacrylate (MMA) and/or 2-hydroxyethyl methacrylate (HEMA) in a weight ratio of polymer phase to monomer phase of 1.5 to 3.3:1 wherein the portion of PHEMA in the cured product is between 2 and 99 weight %. The product is prepared by vigorously stirring the mixture at room temperature until the polymerization is essentially finished.