Cross-linking components for paint binders and processes for...

Details Cross-linking components for paint binders and processes for... Cross-linking components for paint binders and processes for...

C - Chemistry, Metallurgy

08

G

252/41

C08G 18/80 (2006.01) C08G 18/62 (2006.01) C08G 18/64 (2006.01) C09D 5/44 (2006.01)

Patent

CA 1336331

Crosslinking components for paint binders contain- ing hydroxyl groups and/or secondary and/or primary amino groups, particularly for cathodically depositable paints, which can be crosslinked by transesterification and/or transamidation and/or transurethanization, containing for each molecule at least 0.5 transesterifiable groups obtained from CH-activated esters and at least 0.5 blocked isocyanate groups. The crosslinking components are produced by partial transesterification of a polyol, preferably a triol, with a CH-activated ester, preferably a malonic acid diester, and subsequent reaction with a partially blocked polyisocyanate. Paint binders containing the crosslinking components cure at low-bake temperatures to provide films with good surface characteristics.

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