Highly elastic polyurethane foams and process for making them

US4107102A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Dahm · Leverkusen, DE
• Manfred Jautelat · Burscheid, DE

Key dates

• Filing date: May 13, 1977
• Grant date: Aug 15, 1978
• Expiry date: May 13, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2110/0083
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An elastic polyurethane foam having a density, sag factor, tensile strength and elongation at break which adapt it for use in upholstery is prepared by reacting a poly(alkylene ether) polyol having at least about 10% by weight of primary hydroxyl groups and hydrazine or a hydrazine adduct with an organic polyisocyanate which contains at least about 50% by weight of distilled tolylene diisocyanate.