Dual cure rate water-based coating compositions

C - Chemistry – Metallurgy – 09 – D

Patent

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400/1601, 400/42

C09D 5/02 (2006.01) C08G 59/40 (2006.01) C09D 161/24 (2006.01) C09D 161/32 (2006.01) C09D 163/00 (2006.01)

Patent

CA 1333824

A two component water-based composition which cures in two stages, an initial rapid curing stage and a slower curing stage, comprising as the first component, a mixture of a polyaldehyde chosen from the group consisting of glyoxal, gluteraldehyde and derivatives of glyoxal and gluteraldehyde, and a water dispersible component chosen from the group consisting of epoxy resin emulsions which can be emulsified in water, synthetic latexes stable at about pH 7 or less, low molecular weight resin emulsions, epoxy ester emulsions, water emulsified alkyds, and cationic, anionic and non-ionic asphalt emulsions and, as the second component, the non-gel reaction product of N,N'-bis(methoxymethyl) uron and a polyamine chosen from a group consisting of primary and secondary amines and/or a monoamine.

593499

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