Process for the production of oligourethanes containing terminal mercapto groups

US4820789A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Rene-Andres A. Gonzalez · Goldkronach, DE
• Winfried Emmerling · Neuss, DE
• Tore Podola · Monheim, DE
• Klaus Neitzer · Goldkronach, DE

Key dates

• Filing date: Jan 13, 1987
• Grant date: Apr 11, 1989
• Expiry date: Jan 13, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2200/0647
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the production of oligourethanes containing terminal mercapto groups in which the adduct of propylene oxide with trimethylol propane and/or glycerol and/or trimethylol ethane as alkylene oxide adduct containing OH-groups is reacted with isomeric tolylene diisocyanates in excess, based on hydroxyl groups, and the isocyanate groups are further reacted with mercaptoethanol. The adduct of propylene oxide with the trifunctional alcohol is intended to have a calculated molecular weight of from about 1800 to about 6000 and preferably of from about 2000 to about 5000, the reaction products being used for the production of sealing compounds hardening by oxidation or as an additive for crosslinkable epoxy resin systems.