Weatherable block copolyestercarbonates and blends containing them, and method

US6559270B1 · kind B1 · utility

Assignee

• General Electric Company · US

Inventors

• Tiberiu Mircea Siclovan · Schenectady, US
• Jimmy Lynn Webb · Ballston Lake, US
• Sterling B. Brown · Schenectady, US
• Donald Joseph Buckley · Schenectady, US
• James Edward Pickett · Schenectady, US
• Joseph Anthony Suriano · Clifton Park, US
• Paul Dean Sybert · Evansville, US
• Daniel J. Brunelle · Scotia, US
• Margaret Louise Blohm · Niskayuna, US
• Hongyi Zhou · Niskayuna, US
• Georgia Fishburn · Menands, US

Key dates

• Filing date: Oct 12, 1999
• Grant date: May 6, 2003
• Expiry date: Oct 12, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B61/045
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Block copolyestercarbonates may be prepared by first conducting a reaction between at least one of resorcinol or an alkyl- or haloresorcinol and at least one aromatic dicarboxylic acid dichloride, preferably isophthaloyl dichloride, terephthaloyl dichloride or a mixture thereof, to produce a hydroxy-terminated polyester intermediate, and then conducting a reaction of the intermediate with a carbonate precursor, preferably in the presence of a dihydroxy compound such as bisphenol A. The products have excellent physical properties, including a high degree of weatherability. They may be blended with other polymers such as polycarbonates, poly(alkylene carboxylates), polyarylates, polyetherimides, and addition polymers to improve the weatherability thereof.