Binders for cathodic electrocoating which contain non-...

Details Binders for cathodic electrocoating which contain non-... Binders for cathodic electrocoating which contain non-...

C - Chemistry, Metallurgy

09

D

400/5121, 204/97

C09D 5/44 (2006.01)

Patent

CA 1269471

ABSTRACT OF THE DISCLOSURE The 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.

484048

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