Process for the preparation of stabilized polyamines, stabilized polyamines with retarded reactivity and their use for polyurethane production

US4663415A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gerhard Grogler · Leverkusen, DE
• Richard Kopp · Cologne, DE
• Heinrich Hess · Cologne, DE
• Werner Rasshofer · Kürten, DE

Key dates

• Filing date: Jul 29, 1985
• Grant date: May 5, 1987
• Expiry date: Jul 29, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/3253
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention relates to a process for the production of solid polyamines stabilized by a polyadduct covering and showing retarded reactivity comprising reacting PA0 (1) one or more solid organic polyamines in particulate form, said polyamines containing at least two primary and/or secondary amino groups and having melting points above 50.degree. C., and PA0 (2) from 0.1 to 25 equivalent % of isocyanate per amine equivalent of a water insoluble, difunctional and/or higher functional polyisocyanate, said reaction being conducted at a temperature below the melting point of said solid polyamine, and being conducted in the presence of PA0 (3) a liquid medium selected from the group consisting of PA1 (a) organic compounds containing two or more hydroxy groups and having molecular weights of from 62 to 10,000, PA1 (b) plasticizers, PA1 (c) water, and PA1 (d) mixtures thereof to form a suspension of polyadduct-covered stabilized polyamines in the liquid medium.