Water reducible composition based on an epoxy resin

• US 4,598,108 A
• Filed: 06/27/1985
• Issued: 07/01/1986
• Est. Priority Date: 07/06/1984
• Status: Expired due to Fees

• Current Assignee: Akzo Nobel N.V. (Nouryon BV)
• Original Assignee: Akzo Nobel N.V. (Nouryon BV)
• Inventors: Hoefs, Cornelis A. M.
• Primary Examiner(s): Nielsen, Earl
• Application Number:
  US06/749,398
• Time in Patent Office: 369 Days
• Field of Search: 523/414, 523/420, 523/426, 523/411, 523/453, 523/454, 523/455, 525/113, 525/504, 528/88, 528/90, 252/182, 427/386
• US Class Current: 523/411
• CPC Class Codes: C08G 59/50 Amines
• CPC Class Codes: C08J 2363/00 Characterised by the use of epoxy resins; Derivatives of epoxy resins
• CPC Class Codes: C08J 3/03 in aqueous media
• CPC Class Codes: C09D 163/00 Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins

Abstract

The invention provides a water-reducible coating composition comprising an epoxy resin, an amino group-containing curing agent for the epoxy resin and a watersoluble organic compound which occurs in at least 2 tautomeric forms, in one of which a labile hydrogen atom is linked to a carbon atom and which compound contains at least one carbonyloxy group or sulfonyl group.

Claims

1. A water-reducible coating composition comprising an epoxy resin, an amino group-containing curing agent for it and an emulsifying auxiliary compound, characterized in that the emulsifying auxiliary compound is a water soluble organic compound which occurs in at least 2 tautomeric forms, in one of which a labile hydrogen atom is linked to a carbon atom and which compound contains at least one carbonyloxy group or sulfonyl group.

2. The coating composition of claim 1, wherein the emulsifying auxiliary compound is an alkyl cyanoacetate or an alkyl monochloroacetate.

3. The coating composition of claim 1, wherein the emulsifying auxiliary compound is the methyl or ethyl ester of cyanoacetic acid or of monochloroacetic acid.

4. The coating composition of claim 1, wherein the water soluble organic compound which occurs in at least 2 tautomeric forms is present in an amount such that 0.25-2 labile hydrogen toms are present per nitrogen atom of the amino group-containing curing agent.

5. A process for coating a substrate with a water-reducible composition, by applying the composition according to claim 1 to the substate and curing.

6. A mixture of an epoxy resin and a water soluble organic compound which occurs in at least 2 tautomeric forms, in one of which a labile hydrogen atom is linked to a carbon atom and which compound contains at least one carbonyloxy group or sulphonyl group.

7. The mixture of claim 6, also containing an organic solvent for the epoxy resin.