Polyester resin compositions which can be hardened with little shrinkage

US4806603A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Bernhard Hess · Moers, DE
• Bert Brassat · Krefeld, DE
• Oskar Walter

Key dates

• Filing date: Jul 13, 1987
• Grant date: Feb 21, 1989
• Expiry date: Jul 13, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/52
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyester-based mouldings which have been hardened with little shrinkage, do not stick in the mould and therefore can be released from the mould without damage are accessible via moulding compositions containing an unsaturated polyester of defined acid number and certain end groups.