Stabilized unsaturated polyesters

US4523008A · kind A · utility

Assignee

• The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · US

Inventors

• Otto Vogl · Amherst, US
• Eberhard Borsig · Ružinov, SK

Key dates

• Filing date: Jun 6, 1984
• Grant date: Jun 11, 1985
• Expiry date: Jun 6, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F299/0478
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An unsaturated polyester, such as propylene glycol-maleic acid-phthalic acid prepolymer dissolved in styrene is interpolymerized with an ultraviolet absorber of the formula: ##STR1## and/or an antioxidant of the formula ##STR2## where R and R.sup.2 are selected from H or lower alkyl such as methyl and R.sup.1 is tertiary alkyl such as tertiary butyl to form a polymer stable to exposure to the outdoors without degradation by ultraviolet radiation, thermal and/or photooxidation.