Ici Resins Bv

Imperial Chemical Industries Limited

Martinus P Heuts

Gerardus C Overbeek

John G Carey

Yvonne W Smak

David A Pears

A polyurethane polymer having desired chain-pendant or in-chain groups Y is prepared by 1) converting terminal isocyanate groups of an isocyanate-terminated polyurethane prepolymer to groups providing carbon- or nitrogen-bound --NH.sub.2 and/or --NH-- groups, and 2) chain extending modified prepolymer formed in 1) with a compound having at least two enolic carbonyl groups and also having at least one group Y which becomes chain-pendant or in-chain in the chain-extended polymer.

Production of polyurethane polymers, the polymers so produced, and

An aqueous selfcrosslinkable coating composition which comprises an aqueous dispersion of at least one polymer having chain-pendant amine groups and certain selected non-polymeric ketone-containing compounds, particularly acetoacetates and acetoacetamides, whereby selfcrosslinking is effected, often at ambient or low temperatures, during and/or after film formation.

Aqueous coating compositions

An aqueous selfcrosslinkable coating composition which comprises an aqueous dispersion of at least one vinyl polymer, wherein the polymer system constituting said at least one vinyl polymer has chain-pendant amine functional groups and chain-pendant carbonyl functional groups to provide a selfcrosslinking reaction during and/or after coating formation from the composition. The vinyl polymers having both amine and carbonyl groups are also claimed.

Growing community of inventors

Echt, Netherlands

Martinus P Heuts