Storage-stabile, radiation-hardenable, NCO-free aqueous emulsions

US4722966A · kind A · utility

Assignee

• Huls Aktiengesellschaft · DE

Inventor

• Werner Flakus · Recklinghausen, DE

Key dates

• Filing date: Jul 18, 1986
• Grant date: Feb 2, 1988
• Expiry date: Jul 18, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/8175
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A storage-stabile, radiation-hardenable, NCO-free aqueous emulsions based on ionic urethane-urea acrylates is disclosed. The emulsions are made up of partially acrylated cycloaliphatic polyisocyanates which have been acrylated by a hydroxyalkyl acrylate (to the extent of 10-60 equivalent-% NCO). These products are then reacted with polyhydroxy compounds (to the extent of 20-75 equivalent-% NCO), and then with sodium salts of aminocarboxylic acids (to the extent of 5-15 equivalent-% NCO), and finally they are reacted with water and/or aliphatic diamines (said aliphatic diamines in amounts corresponding to 1-5 equivalent-% NCO). The reaction product of the cycloaliphatic polyisocyanate with the hydroxy acrylate compounds and the polyols is taken up into ordinary organic solvents, and these solvent-containing reaction products are converted with aqueous solutions of the sodium salts of aminocarboxylic acids and then with water and/or with an amount of aliphatic diamines corresponding to 1-5 equivalent-% NCO, whereafter the organic solvent is distilled off.