Chemically hardening two-component materials based on polyurethanes, method of production and use

US4672100A · kind A · utility

Assignee

• Gurit-Essex AG · CH

Inventors

• Max Schonbachler · Wollerau, CH
• Wolfgang Saur · Jona, CH

Key dates

• Filing date: Dec 13, 1984
• Grant date: Jun 9, 1987
• Expiry date: Dec 13, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A chemically-hardening two-component material based on polyurethane is provided, having a first component being a prepolymer with isocyanate end groups and a second component being a product which has been obtained from that prepolymer with isocyanate end groups by reacting it with a reactive compound which has at least two active groups, containing active hydrogen and which do not react identically with isocyanate. The prepolymer is a reaction product of an aliphatic or aromatic di-isocyanate with a polyol. Such a material can be produced by reacting a prepolymer which contains isocyanate end groups, with a second component, which, in turn, has resulted from a prepolymer with isocyanate end groups by reacting with a reactive compound which has at least two molecule groups, containing hydrogen and reacting differently with isocyanate. The material is especially suitable as a self-hardening gluing, coating, sealing and molding material.