| 摘要 |
A multi-layer composite coating composition which comprises: (a) a first coat which is substantially free of isocyanate functionality and which comprises: (i) a film-forming composition capable of curing or drying; (ii) a catalyst for the reaction of isocyanate groups and active hydrogen groups; and (iii) optionally, a pigment; (b) a second coat which is preferably substantially free of any catalyst for the reaction of isocyanate groups and active hydrogen groups, and which is applied to the surface of the first coat prior to the complete curing of said first coat, wherein the second coat comprises: (i) an active hydrogen functional compound; and (ii) a polyisocyanate; whereby upon the application of said second coat onto the catalyst containing first coat, the reaction between the polyisocyanate and the active hydrogen functional compound of the second coat is catalyzed.
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