Abstract:
A curable coating composition which is based on a hydroxyl-functional binder and a blocked polyisocyanate, comprising a suspended finely divided, wax-coated polyamide. This composition exhibits a number of superior properties including having a greatly improved abrasion value.
Abstract:
A pigmented solventborne paint pack which can be made into a waterborne coating composition is provided, which comprises: i) a solution in an organic solvent of polymer having functional groups and hydrophilic groups; and ii) a waterborne pigment dispersion comprising pigment dispersed in water in the presence of a pigment dispersant, the aqueous pigment dispersion itself being in dispersion in the solution of i). Also provided is a solventborne activated paint pack comprising the paint pack described above and further comprising a crosslinker which is dissolved in the organic solvent. Further provided is a waterborne coating composition which comprises a dispersion in an aqueous medium of the solventborne activated paint pack.
Abstract:
A curable coating composition with holdout capability, and methods of use thereof, useful in providing a chip resistant two-tone finish in a reduced number of coating steps and curing cycles, which contains a hydroxyl-functional polyester resin, or a plurality of hydroxyl-functional polyester resins, with an average hydroxyl functionality of at least 2.1, a hydroxyl number of 75 to 400 mg KOH/g, a number average molecular weight of 1,000 to 10,000, an acid number of 1 to 30; a curing agent; and, a barium sulfate pigment This invention is also directed to method for coating a substrate with the above coating composition. In one embodiment, the method comprises (1) applying a holdout capable chip resistant primer coating composition of the forgoing character to an accent area of a electrodeposition primed substrate, (2) applying a primer surfacer coating composition to an adjacent non-accent area of the substrate, (3) applying an accent color basecoating composition wet-on-wet to the chip resistant primer coating composition in the accent area, (4) curing the composite coated substrate in a first bake, (5) covering the accent area with a protective membrane, (6) applying a main color basecoating composition over the unmasked area, (7) removing the protective membrane from the accent area, (8) applying a clear coating composition wet-on-wet to all faces of the substrate, and then (9) curing the composite two-toned coated substrate in a second bake, is also claimed. Further claimed is a substrate coated by the aforementioned coating and methods.
Abstract:
There is provided an epoxy resin powder coating containing an epoxy resin, a curing agent, a curing accelerator and a polyol having a melting point of 40 to 110° C. The polyol is, for example, a polyether polyol or polyester polyol having a weight average molecular weight of 1,000 to 30,000 and is contained in an amount of 10 to 60 parts by weight based on 100 parts by weight of the epoxy resin. A film formed from the epoxy resin powder coating hardly undergoes peeling and the occurrence of cracks even when an article coated with the coating is deformed after the film is cured. The coating is also excellent in heat resistance and cracking resistance.
Abstract:
Curable coating compositions are described comprising(a) a polymer resin comprising carbamate functional groups,(b) a curing agent having groups that are reactive with said functional groups on (a), and(c) a compound having a molecular weight of from 75 to 2000 comprising at least one group of the formula: ##STR1## wherein X is O or NH, R is H or alkyl of 1 to 4 carbon atoms, and either (a), (b), or both (a) and (b) comprise groups that are reactive with said group on (c).
Abstract:
The present invention provides a curable coating composition that includes at least three components. The coating composition includes a component (a) having at least one carbamate group or urea group and having a lactone or hydroxy carboxylic acid moiety. The second component (b) of the coating composition is one or more of three materials. First, the second component can be a polymer resin (b)(1) comprising active hydrogen-containing functional groups reactive with the third component(c). Secondly, the second component can be a compound (b)(2) having at least one carbamate group or terminal urea group according to the invention and having at least two linking groups that are urethane or urea. Finally, the second component can be a compound (b)(3) having at least two groups selected from carbamate groups, terminal urea groups, or combinations of the two and at least four urethane or urea linking groups. The third component of the coating composition is a curing agent that is reactive with the first two components. Preparation of coated articles using the compositions of the invention is also disclosed.
Abstract:
The invention provides composite color-plus-clear coatings having improved appearance, especially with respect to wrinkling, and to methods and compositions for providing such coatings. The method of the invention utilizes a second coating composition comprising (A) a film forming component comprising (a) a first component comprising a compound having appended thereto at least one carbamate or urea functional group, or a group convertible to a carbamate or urea group, and (b) a second component comprising a compound reactive with said carbamate or urea groups on component (a), (B) a cyclic anhydride, and (C) a catalyst.
Abstract:
The present invention is directed to a polymeric vehicle, the formulated coating composition and a coating binder made from the polymeric vehicle and a method for making the polymeric vehicle where the polymeric vehicle includes a phenol blocked isocyanate having reactive aliphatic hydroxyl groups. The phenol blocked isocyanate may be made from a phenolic ester alcohol having at least one aliphatic hydroxyl group and one phenolic hydroxyl group.
Abstract:
A process for producing an aqueous coating composition comprising an aqueous dispersion of internally crosslinked polymer microgel particles in which the microgel articles are produced by emulsion polymerisation of ethylenically unsaturated monomers including carboxyl functional monomer in an aqueous medium so as to form an aqueous dispersion of carboxyl functional addition polymer followed by reacting this polymer dispersion with a diepoxide resin having an epoxide equivalent weight between 100 and 5000 to form the crosslinked polymer microgel particles.
Abstract:
A color-plus-clear coating system is disclosed. A pigmented or colored basecoat is first applied to a substrate followed by the application of a transparent topcoat to the basecoat. The transparent topcoat composition is a crosslinkable composition comprising (1) a material containing a plurality of carbamate and/or urea functional groups and (2) an aminoplast crosslinking agent. The topcoat composition provides a composite coating with improved acid etch resistance, making the composite coating particularly useful as an automotive topcoat.