Isocyanate derivatives containing carbodiimide groups, a process for their production and their use as additives for aqueous solutions or dispersions of plastics

US4910339A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wolfgang Henning · Zorneding, DE
• Walter Meckel · Neuss, DE

Key dates

• Filing date: Mar 27, 1986
• Grant date: Mar 20, 1990
• Expiry date: Mar 27, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/42
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention is directed to isocyanate derivatives containing about 2 to 30% by weight of carbodiimide groups, --N.dbd.C.dbd.N--, on a statistical average at least about 0.8 carbodiimide groups per molecule, about 5 to 200 milliequivalents per 100 g of solids of chemically incorporated sulfonate groups and, optionally, 0 to about 25%, based on solids, of chemically incorporated ethylene oxide units, --CH.sub.2 --CH.sub.2 --O--, in polyether chains. The present invention is also directed to a process for the preparation of these isocyanate derivatives and to their use as additives for aqueous dispersions or solutions of plastics containing carboxyl groups or groups convertible into carboxyl groups.