Storage-stable emulsions for producing fine-celled rigid foams based on isocyanate

US5916480A · kind A · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Sep 24, 1998
• Grant date: Jun 29, 1999
• 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

Blowing agent-containing emulsions comprise PA1 a) compounds containing hydrogen atoms which are reactive toward isocyanates, PA1 b) blowing agents, PA1 c) catalysts, auxiliaries and/or additives which are customary in polyurethane chemistry, wherein the blowing agents b) are present as an emulsion in the components a) and c), and polyester alcohols having the following structure are used as emulsification aids: ##STR1## where m=0-15 PA1 n=0-1 PA1 o=0-15 PA1 p=0-1 PA1 q=0-15 PA1 r=0-1 PA1 s=0-15 PA1 t=0-1 PA1 u=0-10 PA1 v=0-15 PA1 x=1-5 PA1 y=1-4 or mixtures of 1-3 where r+n.noteq.0 PA1 z=0-3 PA1 z.sub.i =0.1-3 PA1 R.sub.1 is an aliphatic structure without OH groups, based on the structure of polyhydric alcohols, preferably ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol and dipropylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, 1,3-butanediol, trimethylolpropane, trimethylol ethane, glycerol, pentaerythritol, where these substances can also be used as any mixture with one another in the esterification and R.sub.1 can therefore also be a mixture of the corresponding structures, PA1 R.sub.2 is the radical of a polycarboxylic acid without C…