Process for the production of low-fog flexible polyester polyurethane foams and their use in vehicles

US5373029A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Naujoks · Odenthal, DE
• Klaus Konig · Leverkusen, DE
• Manfred Schmidt · Krefeld, DE
• Hans-Walter Illger · Rösrath, DE
• Gunter Baatz · Rösrath, DE
• Hansjurgen Rabe · Leverkusen, DE

Key dates

• Filing date: Nov 18, 1993
• Grant date: Dec 13, 1994
• Expiry date: Nov 18, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2290/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Low-fog flexible polyester polyurethane foams are produced by reacting PA1 a) polyisocyanates, with PA1 b) polyesters containing at least two hydroxyl groups and having a molecular weight in the range from 400 to 10,000, in the presence of PA1 c) water and/or readily volatile organic compounds as blowing agents wherein prior to reacting, the polyesters have been subjected to continuous distillation over an average holding time of 2 to 600 s, at a temperature of 160.degree. to 250.degree. C., and under a pressure of 0.05 to 10 mbar. The reaction mixture may optionally contain PA1 d)compounds containing at least two active hydrogen atoms and having a molecular weight in the range from 32 to 400 as chain-extending and crosslinking agents, and/or PA1 e) auxiliaries and additives known per se. These low-fogging polyester polyurethane foams are extremely suitable for use in vehicles, preferably automobiles.