Abstract:
A method of refurbishing a surface of a component for an electronic device, includes: contacting a surface to be refurbished with an etching composition to provide a treated surface; optionally firstly cleaning the treated surface by contacting with a glass cleaner to provide a firstly cleaned surface; optionally secondly cleaning the firstly cleaned surface by contacting the firstly cleaned surface with a grease remover to provide a secondly cleaned surface; optionally contacting the secondly cleaned surface with an activator to provide an activated surface; disposing a coating resin on the treated and optionally activated surface; and curing the coating resin to provide a coated surface to refurbish the surface of the electronic device, wherein the coating resin comprises a hydroxyl functional dendritic polymer; optionally an acrylic polyol; and a plurality of metal oxide nanoparticles optionally encapsulated in a hydroxyl functional polymer or a hydroxyl functional fluorosurfactant.
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:
The present invention has for its object to provide an emulsion polymer resin composition adapted to give a coating film having an excellent appearance in terms of gloss, image sharpness, and apparent thickness, be satisfactory in curability and storage stability, contribute to cost reduction, express satisfactory coating film properties such as hardness, high impact resistance, scratch resistance, acid rain resistance, and weather resistance, and be conducive to a reduced VOC level, a curable composition comprising the above emulsion polymer resin composition and a crosslinking agent, and a cured coating film formed from the above curable composition. The present invention is an emulsion polymer resin composition which contains a hydroxyl group and a functional group reactive with the hydroxyl group within the same particle and has a weight average molecular weight of not less than 10000 but not more than 500000.
Abstract:
The invention is directed to a two-pack high solids low VOC ambient curable coating composition, which includes cross-linking and binder components. The cross-linking component includes a polyamine, a polyketimine or a combination thereof. The polyamine is provided on an average with at least two amine functionalities per polymer chain and the polyketimine is provided on an average with at least two ketimine functionalities per polymer chain. A reactive diluent in the binder component includes a macromolecule substantially free from acrylate functionalities and having at least two acetoacetate functionalities per the macromolecule. If desired, the coating composition includes a binder polymer. The coating composition of the invention is particularly suited in automotive refinish coating.
Abstract:
The present invention provides a radiation-curable coating material comprising at least one radiation-curable binder having at least two acrylic ester and/or methacrylic ester groups, which comprises (a) as binder (a) a mixture of (a1) at least one binder (a1) having at least two acrylic ester and/or methacrylic ester groups and having an elongation at break of at least 20 %, preferably at least 40 %, and (a2) at least one further binder (a2) which is different from (a1) and has at least two acrylic ester and/or methacrylic ester groups, (b1) at least one silicone-containing lubricant (b1) and (b2) at least one halogen-containing polyolefin wax (b2). The invention also provides for the use of this coating material for producing multicoat paint systems, especially as a clearcoat or as a topcoat, and to its use for coating glass metal substrates, especially for coating packaging containers.
Abstract:
A flexible, aminoplast-curable film-forming composition can serve as a transparent coating composition for a multi-component composite coating composition having the transparent coating on a pigmented or colored base coat. The film-forming composition comprises at least two polymeric components. One is a polyether polymer containing a plurality of terminal and/or pendant carbamate groups of Structure (I). Another is at least one additional carbamate functional polymer along with urethane oligomer or is a polyurethane polyol or is a polyester derived from cycloaliphatic acid or anhydride. The former include carbamate functional polyester, acrylic polymer, and polyurethane, where each contains a plurality of terminal and/or pendant carbamate groups of Structure (I) depicted above. Also the urethane oligomers have a plurality of carbamate groups of Structure (I) that are pendant and/or terminal. The latter polyurethane polyol has a plurality of pendant and/or terminal hydroxyl groups and optionally can be used with the urethane polyol and/or any of the aforementioned carbamate functional polymers. Optionally an additional polymer that is present in an acrylic polymer containing a plurality of amide groups with or without a plurality of terminal and/or pendant carbamate groups of Structure (I). Also with the presence of the amide functional acrylic polymer, silica can be employed. Additionaly for cross-linking the film-forming composition contains an aminoplast cross-linking agent.
Abstract:
A paint composition comprising a pigment and an acid-curable paint varnish and further containing an organic coloring matter derivative represented by the general formula (I): Q-(A-SO3H)n, or an aluminum salt thereof and a basic resin pigment dispersant having a weight-average molecular weight of 1,000 to 100,000 and an amine value of 10-200 mg KOH/g. The composition is excellent in pigment dispersion, even though the resin has a low molecular weight. In said formula Q represents an organic coloring-matter residue; A represents -CONH-Y1-, -SO2NH-Y1- or -CH2NH-Y1-; Y1 represents alkylene, etc; and n represents 1 to 4.