Polyurethane coating compositions
AssigneeICI Resins BV
InventorsGerardus C. Overbeek, Martinus P. J. Huets
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Abstract
Aqueous selfcrosslinkable coating composition comprising an aqueous dispersion of at least one polyurethane and having hydrazine (or hydrazone) functional groups and carbonyl functional groups disposed therein to provide a selfcrosslinking reaction, in which the polyurethane polymer takes part, via azomethine formation during and/or after film formation.
Claims21
An aqueous selfcrosslinkable coating composition comprising an aqueous dispersion which comprises at least one polyurethane polymer, wherein said composition has hydrazine (or hydrazone) functional groups and carbonyl functional groups present in the composition to provide a selfcrosslinking reaction, in which said at least one polyurethane polymer takes part, via azomethine formation from the reaction of hydrazine (or hydrazone) functional groups and carbonyl functional groups during and/or after film formation from the aqueous composition.
Dependencies are inferred from the claim text.