High-impact polymer alloys

US4507444A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wilhelm Slawyk · Cologne, DE
• Gerhard Balle · Cologne, DE
• Manfred Munzer · Bensheim, DE
• Adolf Wohnhas, deceased · Weiterstadt, DE

Key dates

• Filing date: Aug 21, 1981
• Grant date: Mar 26, 1985
• Expiry date: Aug 21, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2270/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process of making radically polymerizable compositions suitable for the production of impact resistant optically clear glass like plastic and forming the glass from such compositions is disclosed. Also taught are the polymerizable compositions and the final glass produced. An isocyanate terminated prepolymer based upon a polyol selected from polyesters, polyester amides, polycarbonates and polyacetals and diisocyanates selected from branched aliphatic isocyanates, cycloaliphatic isocyanates and aliphatic or cycloaliphatic isocyanates graft polymerized with vinyl monomers is chain extended with aliphatic or cyloaliphatic diamines while in solution in vinyl monomers consisting mainly of methacrylic acid esters. The chain extension is carried out with a deficit of amine and preferably to a viscosity at 20% solids in the vinyl monomers of between 200 and 30,000 cP at 20.degree. C. The composition is then radically polymerized to form the high impact glass like plastic alloy.