Abstract:
The invention relates to a process for the manufacture of a waterborne multistage polymer dispersion that has ethylenically unsaturated functional groups for crosslinking. The process comprises the steps of; a. making an aqueous emulsion or solution of a first stage polymer comprising carboxylic acid functionalised monomers to an amount sufficient to make the first stage polymer water soluble or dispersible, b. at least partially neutralising the first stage polymer with a base, c. forming a two-stage polymer dispersion by adding to the at least partially neutralised first stage polymer a second stage monomer mixture and emulsion polymerising said second stage monomer mixture to a second stage polymer which is less hydrophilic than the first stage polymer, d. reacting with the obtained two-stage polymer dispersion a bi-functional compound comprising an ethylenically unsaturated group and a group reactive towards the carboxylic acid in the two-stage polymer. The invention further relates to a water-borne curable multistage polymer dispersion, to coating compositions.
Abstract:
The invention provides stainproofing agents capable of giving coating films excellent in rain streak stain resistance and duration thereof, coating compositions containing the same, and articles coated with the compositions, particularly, a stainproofing agent consisting of a polymer which contains at least one repeating unit bearing two or more hydroxyl groups and has a content of the unit of higher than 10 % by mass; a stainproofing agent consisting of a polymer which contains at least two hydroxymethyl−bearing repeating units and has a content of the units of higher than 30 % by mass; and coating compositions each comprising a stainproofing agent described above and a coating resin such as a fluororesin.
Abstract:
A multi-component coating composition curable at ambient temperature to a hard, glossy, and tack-free finish is described. The coating composition comprises a fatty acid modified glycidyl-containing component and a hydroxy-functional polymer. The coating composition exhibits superior adhesion to substrate and excellent weatherability, and, thus, can be used to finish or to refinish such articles as farm, industrial, and construction equipment, automobiles, and trucks, and to provide durable coatings for structures such as bridges, buildings, appliances, metal furniture, and the like.
Abstract:
The present invention provides a curable coating composition that includes at least three components. The coating composition includes a component (a) that includes one or both of a compound (a)(1) 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 or a compound (a)(2) 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 second component (b) of the coating composition includes an acrylic polymer comprising active hydrogen-containing functional groups reactive with the third component (c). Component (c) 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 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:
Water-based coating compositions comprise an aqueous solution, emulsion, or dispersion of (a) a water-soluble or water-dispersible polymer or oligomer having at least one anionic moiety which is capable of reacting with an oxazoline or oxazine moiety; (b) a water-soluble or water-dispersible polymer or oligomer having at least one oxazoline or oxazine moiety; and (c) colloidal silica; at least one of the components (a) and (b) further comprising at least one fluoroaliphatic moiety. The compositions can be used to form hard coatings having low surface energy and high abrasion resistance.
Abstract:
Described are thermosetting powder coating compositions which can provide durable, substantially surface defect-free films upon curing, as well as methods of coating substrates, substrates so coated and end uses thereof. The thermosetting powder coating compositions in accordance with the present invention are based on a substantially acid-free active hydrogen groups-containing backbone resin component, and a cross-linker component containing a solid tris-alkoxymethyl melamine cross-linking agent.
Abstract:
A crosslinkable liquid carrier-based coating composition formulated from components comprising an organic polymer(s) having acetoacetyl group functionality, a polyamine compound(s) having at least two acetoacetyl-reactive amino groups per molecule, and a non-polymeric monoacetoacetyl compound(s) which can evaporate on coating formulation selected from at least one of alkyl acetoacetate, alkyl acetoacetamide and 1-alkyl-1,3-butanedione where said alkyl groups in said compounds have from 1 to 3 carbon atoms, and wherein the ratio of the number of acetoacetyl groups from said monoacetoacetyl compound(s) to the number of polymer-bound acetoacetyl groups from said organic polymer(s) having acetoacetyl group functionality is within the range of from 0.8/1 to 1.5/1. The preferred monoacetoacetyl compound is methyl acetoacetate.
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.
Abstract:
An aminoplast-curable film-forming composition is disclosed. The film-forming 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 composition provides a coating with improved acid etch resistance, making the coating particularly useful as an automotive clear coat.