Basecoat/clearcoat method of coating utilizing an anhydride...

Details Basecoat/clearcoat method of coating utilizing an anhydride... Basecoat/clearcoat method of coating utilizing an anhydride...

C - Chemistry, Metallurgy

09

D

117/148

C09D 133/06 (2006.01) B05D 1/36 (2006.01) B05D 5/00 (2006.01) B05D 7/00 (2006.01)

Patent

CA 1303439

ABSTRACT Disclosed is a method of coating comprising the steps of: (I) coating a substrate with one or more applications of a pigmented basecoating composition comprising a thermoplastic, non-crosslinked, film-forming polymer having at least two functional groups per molecule which functional groups are co-reactive with acid anhydride moieties, to which basecoating composition has been added within 24 hours prior to coating the substrate, a carboxylic acid anhydride component having at least two cyclic anhydride groups in an amount so as to provide a ratio of equivalents of anhydride groups to equivalents of the co-reactive functional groups of at least 0.10:1.00 to form a basecoat; and (II) coating the basecoat with one or more applications of a transparent, crosslinking, topcoating composition comprising a crosslinkable, film-forming material and a crosslinking agent for the crosslinkable, film-forming material to form a transparent topcoat.

574022

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