Self-emulsifying aqueous epoxy resin dispersions

US5908902A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Armin Pfeil · Kaufering, DE
• Dieter Dreischhoff · Wiesbaden, DE
• Claus Godau · Kiedrich, DE

Key dates

• Filing date: Jun 7, 1996
• Grant date: Jun 1, 1999
• Expiry date: Jun 7, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G59/066
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A selif-emulsifying epoxy resin (A), prepared from proportions by mass of PA1 (A-1) from 50 to 95% of one or more epoxide compounds having at least two epoxide groups per molecule and an epoxide group content of from 300 to 11,200 mmol/kg; PA1 (A-2) from 5 to 50% of an aromatic polyol; PA1 (A-3) from 0 to 25% of modifying compounds having at least two epoxide-reactive groups; PA1 (A-4) from 5 to 25% of an emulsifying product of the condensation of PA2 (A-4-a) an aliphatic polyol having a weight-average molar mass M.sub.W of from 200 to 20,000 g/mol and PA2 (A-4-b) an epoxide compound having at least two epoxide groups per molecule and an epoxide group content of from 500 to 10,000 mmol/kg, PA2 whereby the ratio of the number of OH groups to the number of EP groups is from 1:2 to 1:10 and the epoxide group content of these condensation products (A-4) is between 100 and 6700 mmol/kg.