| 摘要 |
<p>A coating composition of a film forming binder and an organic liquid carrier; wherein the binder contains about (a) 10-90% by weight, based on the weight of the binder, of a dispersed gelled acrylic polymer having a glass transition temperature of at least 20 DEG and the polymer has (i) a core of comprising polymerized ethylenically unsaturated monomers which is not soluble in the organic liquid carrier and having chemically grafted thereto (ii) substantially linear stablizier polymeric components that are soluble in the organic liquid carrier and comprise polymerized ethylencially unsaturated monomers and have a weight average molecular weight of about 500-20,000 determined by GPC; wherein the monomers of the core and the stabilizer polymeric components are individually selected from the following group of monomers: alkyl methacrylates, alkyl acrylates, wherein the alkyl groups have 1-12 carbon atoms, hydroxy alkyl methacrylate, hydroxy alkyl acrylates, wherein the alkyl groups have 1-4 carbons atoms, styrene, alpha methyl styrene, vinyl toluene, glycidyl methacrylate, glycidyl acrylate, alpha-beta ethylenically unsaturated monocarboxylic acids and any mixtures thereof and the core, stabilizer polymeric component or both contain at least 3% by weight of polymerized ethylenically unsaturated monomers having functional components that are capable of reacting with components (b) and/or (c); (b) 0-70% by weight, based on the weight of the binder, of an oligomer having functional groups capable of reacting with component (c); and (c) 10-50% by weight, based on the weight of the binder, of an organic polyisocyanate crosslinking agent.</p> |
