Cathodic water-dilutable binders, water-dilutable coating compositions and processes for the preparation of cathodic water-dilutable binders based on mercapto-ketimine-modified epoxy resins

US5086091A · kind A · utility

Assignee

• Basf Lacke & Farben Aktiengesellschaft · DE

Inventors

• Michael Geist · Munster, DE
• Klaus Cibura · Southfield, US
• Helmut Fobbe · Munster, DE
• Gunther Ott · Hachenburg, DE

Key dates

• Filing date: Nov 20, 1989
• Grant date: Feb 4, 1992
• Expiry date: Nov 20, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D5/443
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to cathodic water-dilutable binders which contain primary amino groups neutralized with acids and introduced via ketimine groups. The binders have been prepared by reacting PA1 (A) a synthetic resin containing epoxy groups with PA1 (B) at least one compound which, in addition to a mercapto group which is reactive toward epoxy groups, also possesses at least one ketimine group, and, if required, PA1 (C) other modifying compounds, such as, for example, monocarboxylic acids and/or other primary and/or secondary amines, and have then been neutralized with an acid.