Solutions of oligo-urethane ethers in polyether polyols and their use in a process for the production of polyurethane foams

US4427798A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Klaus Konig · Leverkusen, DE
• Gernot Becker · Stuttgart, DE
• Peter Seifert · Wittlich, DE

Key dates

• Filing date: Mar 10, 1982
• Grant date: Jan 24, 1984
• Expiry date: Mar 10, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/6666
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to solutions of PA1 (A) from 3 to 60% by weight, based on the combined ether-polyol content, of separately prepared oligo-urethane ethers containing terminal OH.sup.- groups in the form of reaction products of PA2 (a) diisocyanates with PA2 (b) dialcohols having an average molecular weight of from 200 to 800, the stoichiometric ratio of (a) to (b) amounting to various values based on the average molecular weight of the dialcohols, PA1 in PA1 (B) polyether polyols containing at least 2 hydroxyl groups and having an average molecular weight of from 1000 to 12,000 and to their use in a proess for the production of polyurethane foams capable of being effectively flame-laminated and (high-frequency) welded without any adverse effect upon their other properties. The process for producing flame-laminatable and high-frequency-weldable flexible polyurethane foams is characterized by the reaction of PA2 (i) polyisocyanates with PA2 (ii) relatively high molecular weight compounds containing at least 2 hydroxyl groups, PA2 (iii) optionally other relatively high molecular weight and/or low molecular weight compounds containing isocyanate-reactive hydrogen atoms and water, …