Process for the production of polyisocyanate polyaddition products which comprises reacting organic polyisocyanates, polycyclic condensation products of formaldehyde with diamines, and water

US4150213A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Jurgen Hocker · Bensberg, DE
• Wolfgang Wellner · Bensberg, DE
• Walter Uerdingen · Leverkusen, DE

Key dates

• Filing date: Apr 7, 1978
• Grant date: Apr 17, 1979
• Expiry date: Apr 7, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2190/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the production of polyisocyanate polyaddition products by reacting organic polyisocyanates with compounds which give off organic diamines under the hydrolytic influence of water and also with water, optionally in the presence of sub-equivalent quantities, based on the NCO-groups present in the reaction mixture, of organic compounds containing isocyanate-reactive hydrogen atoms, wherein polycyclic condensation products of formaldehyde with aliphatic or cycloaliphatic diprimary 1,2-diamines are used as the compounds which give off organic diamines under the hydrolytic influence of water. The present invention also relates to the mixtures preferably used for carrying out this process, containing: PA1 (a) at least one organic polyisocyanate; and PA1 (b) a moisture-activatable hardener for component (a); distinguished by the fact that condensation products of formaldehyde with aliphatic or cycloaliphatic diprimary 1,2-diamines are used as hardener (b).