Patent · US Expired

Binders for cathodic electrocoating which contain non-tertiary basic amino groups in addition to phenolic mannich bases

US4721758A · kind A · utility

4Cited by

7References

13Claims

0Family size

Assignee

BASF SE

Inventors

Eberhard Schupp · Schwetzingen, DE
Rolf Osterloh · Lechenich, DE
Werner Loch · Erpolzheim, DE
Klaas Ahlers · Munster, DE

Key dates

Filing date	Jun 13, 1985
Grant date	Jan 26, 1988
Priority date	—
Expiry date	Jun 13, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D5/4496
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The present invention relates to binders for cathodic electrocoating. These binders contain non-tertiary basic amino groups in addition to phenolic Mannich bases and consist of a mixture or precondensate of a polymer, polycondensate or polyadduct which has a mean molecular weight of 800 to 8,000 and a content of basic, primary and/or secondary amino groups of 0.8 to 8 equivalents per 1,000 molecular weight units and one or more phenolic Mannich bases prepared from one or more polynuclear polyphenols, formaldehyde or a formaldehyde donor and one or more secondary aliphatic amines, not more than one equivalent of a secondary amine and not more than 2 equivalents of formaldehyde being employed per equivalent of phenol for the preparation of component (B). These binders can be rendered water-dilutable by the addition of an acid and are suitable for the cathodic electrocoating of electrically conductive articles.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.