Low shrink, free flowing polyester resin systems based on a mixture of a crystalline unsaturated polyester resin, a monomeric copolymerizable component and a cellulose ester

US3989655A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans Rudolph · Krefeld, DE
• August Bockmann · Krefeld, DE
• Leonhard Goerden
• Oskar Walter
• Hansjochen Schulz-Walz

Key dates

• Filing date: Jan 17, 1974
• Grant date: Nov 2, 1976
• Expiry date: Jan 17, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L67/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A composition comprising PA1 A. 24-70% by weight of an unsaturated crystalline polyester which is the condensation product of fumaric acid and a glycol of the formula EQU HO--CH.sub.2 --R--CH.sub.2 --OH PA1 wherein R is of the formula (CH.sub.2).sub.z wherein z is 1 to 18 or a symmetrical dialkyl derivative of (CH.sub.2).sub.z wherein the alkyl substituents are situated on the same carbon atom or cycloalkylene, PA1 B. 20-70% by weight of styrene and PA1 C. 1-30% by weight of at least one member selected from the group consisting of a polycarbonate, polyamide, polyvinyl alcohol, polyvinyl alcohol acetal, polyvinylchloride, cellulose ester of at least one organic acid and polyethylene. Said mixture may additionally contain one or more fibrous reinforcing agents and one or more fillers.