Producing rigid polyurethane foams and rigid polyisocyanurate foams

US8895636B2 · kind B2 · utility

Assignee

• BASF SE

Inventor

• Gunnar Kampf · Bohmte, DE

Key dates

• Filing date: Dec 31, 2012
• Grant date: Nov 25, 2014
• Expiry date: Dec 31, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2115/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Rigid polyurethane foams or rigid polyisocyanurate foams with low brittleness are produced by the reaction of polyisocyanate polyetherester polyols based on aromatic dicarboxylic acids obtained by esterification of a dicarboxylic acid composition containing aromatic dicarboxylic acids and aliphatic dicarboxylic acids, fatty acids, aliphatic or cycloaliphatic diols having 2 to 18 carbon atoms or alkoxylates thereof, and a polyether polyol having a functionality of not less than 2.