Novel polyacetal copolymers of trioxane and trimethylolpropane formal derivatives

US5004798A · kind A · utility

Assignee

• Hoechst Celanese Corporation · US

Inventors

• Jerry A. Broussard · Summit, US
• Andrew Auerbach · Livingston, US
• Nan-Loh Yang · Staten Island, US
• James L. Paul · Houston, US
• Yong Zheng · Cary, US
• Chong Zhang · Staten Island, US

Key dates

• Filing date: May 12, 1989
• Grant date: Apr 2, 1991
• Expiry date: May 12, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2/24
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Cationic copolymerization of trioxane and trimethylolpropane (TMP) formal or its ester derivatives yields acetal copolymers having pendant functional groups. The TMP formal or ester derivatives of TMP formal may therefore include functional groups selected from hydroxyl or ester moieties which are protected and thus survive the copolymerization with trioxane. These groups may then be present as functional reactive sites for the subsequent synthesis of block copolymers and/or to chemically bind modifiers to the acetal copolymer backbone, for example.