Aqueous coating composition.

摘要

Disclosed is a novel curing system which is not associated with decomposition or production of low molecular materials. The curing system employs aqueous composition which comprises (a) a compound having in one molecule at least two carbonylcyclic urea groups represented by the following formula (1); [wherein n is an integer of 0 to 5, X which may be the same or different represents oxygen atom, a sulfur atom or -NR1- in which R1 is a hydrogen atom, an alkyl, hydroxyalkyl or alkylene group having 1 to 5 carbon atoms.] and (b) a basic resin which has a functional group reactive with an isocyanate group and is water soluble or water dispersible by neutralizing. The present invention also provides an aqueous composition comprising a basic resin (c) which has a functional group reactive with an isocyanate group and has in one molecule at least two carbonylcyclic urea groups represented by the following formula (1); [wherein n and X are the same as mentioned above.] and which is water soluble or water dispersible by neutralizing.