Storage-stable, blowing agent-containing emulsions for producing rigid foams based on isocyanate

US6274642A · kind A · utility

Assignee

• BASF SE

Inventors

• Udo Rotermund · Ortrand, DE
• Anja Biedermann · Senftenberg - Zły Komorow, DE
• Renate Hempel · Ruhland, DE
• Werner Wiegmann · Rahden, DE
• Marion Heinz · Bernsdorf, DE

Key dates

• Filing date: Sep 24, 1998
• Grant date: Aug 14, 2001
• Expiry date: Sep 24, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Storage-stable, blowing agent-containing halogen-free emulsions for producing rigid foams based on isocyanate comprise PA1 a) compounds containing hydrogen atoms which are reactive toward isocyanate groups, PA1 b) water, PA1 c) physically acting, halogen-free blowing agents and, if desired, PA1 d) auxiliaries and/or additives which are customary in polyurethane chemistry, wherein the component a) comprises polyether alcohols having a functionality of greater than 1.5 and a hydroxyl number of from 10 to 100 mg KOH/g in an amount of from 0.2% by mass to 80% by mass, based on the mass of the component a), and the halogen-free, physically acting blowing agents c) used are hydrocarbons having from 3 to 10 carbon atoms.