Process for the production of polyurethane foams

US5416130A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ulrich Liman · Monheim, DE
• Heinz Eickhaus · Kürten, DE
• Gerd Steinert · Leverkusen, DE

Key dates

• Filing date: Mar 4, 1994
• Grant date: May 16, 1995
• Expiry date: Mar 4, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2170/60
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the production of polyurethane foams, in particular for the production of composite articles by back-foaming a plastics film as covering layer by the reaction of PA1 a) one or more polyisocyanates with PA1 b) a polyol component which is free from salt groups in the presence of PA1 c) at least one blowing agent, PA1 d) alkali metal carboxylates and PA1 e) from 0.01 to 30% by weight, based upon the weight of component b), of one or more organic compounds which are different from components a) through d), which are free from tertiary amino groups, metal and phosphorus and which have a dipole moment above 2.0 Debye.