Polyetherpolycarbonatediols

US5137935A · kind A · utility

Assignee

• BASF SE

Inventors

• Kaspar Bott · Mannheim, DE
• Wolfgang Straehle · Heidelberg, DE
• Ulrich Abel · Schifferstadt, DE

Key dates

• Filing date: Feb 15, 1991
• Grant date: Aug 11, 1992
• Expiry date: Feb 15, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G69/44
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyetherpolycarbonatediols are composed essentially of PA0 A) from 3 to 63.7 mol % of units derived from a polyoxytetramethylenediol, PA0 B) from 63.7 to 3 mol % of units derived from a polyoxy-C.sub.2 -C.sub.8 -alkylenediol other than A), an aliphatic alkanediol of from 2 to 14 carbon atoms, an alicyclic alkanediol of from 3 to 14 carbon atoms or an alkylene oxide of 2 to 3 carbon atoms, or a mixture thereof, and PA0 C) from 33.3 to 50 mol % of units derived from phosgene, a dialkyl carbonate having C.sub.1 -C.sub.4 -alkyl groups or a cyclic carbonate having C.sub.2 -C.sub.4 -alkylene bridges, or a mixture thereof.