Abstract: A curable top coating composition essentially including(A) a hydroxyl-containing vinyl type resin containing 45 to 55% by weight of styrene monomer as a copolymerized unit of the resin,(B) at least one member selected from among amino resins and (blocked) polyisocyanate compounds, and(C) a microparticulate polymer having an average particle diameter within the range of 0.01 to 1 .mu.m and containing 40 to 60% by weight of styrene monomer as a copolymerized component of each particle,wherein the cured film from the coating composition contains the styrene-derived benzene ring in a proportion of 13 to 40% by weight of the total resin solids;a coating method using the above coating composition, anda coated article obtainable by using the above coating composition.

Abstract: The present invention provides (1) a self-crosslinking resin (I) having a carboxyl group, a blocked isocyanate group and a hydroxyl group in the molecule and characterized in that the resin is prepared from a vinyl polymer (A) having at least two free isocyanate groups in the molecule and a polyester resin (B) having at least two hydroxyl groups and at least one carboxyl group in the molecule by reacting some of the hydroxyl groups of the resin (B) with some of the free isocyanate groups of the polymer (A), and subsequently reacting a blocking agent with all the remaining free isocyanate groups, and (2) a self-crosslinking resin (II) having a carboxyl group, a blocked isocyanate group and a hydroxyl group in the molecule and characterized in that the resin is prepared from a vinyl polymer (C) having a free isocyanate group and a blocked isocyanate group in the molecule and the polyester resin (B) having at least two hydroxyl groups and at least one carboxyl group in the molecule by reacting some of the hydrox

Abstract: The present invention provides(1) a self-crosslinking resin (I) having a blocked isocyanate group and a hydroxyl group in the molecule and characterized in that the resin is prepared from a vinyl polymer (A) having at least two free isocyanate groups in the molecule and a polyester resin (B) having at least two hydroxyl groups in the molecule by reacting some of the hydroxyl groups of the resin (B) with some of the free isocyanate groups of the polymer (A), and subsequently reacting a blocking agent with all the remaining free isocyanate groups, and(2) a self-crosslinking resin (II) having a blocked isocyanate group and a hydroxyl group in the molecule and characterized in that the resin is prepared from a vinyl polymer (C) having a free isocyanate group and a blocked isocyanate group in the molecule and the polyester resin (B) having at least two hydroxyl groups in the molecule by reacting some of the hydroxyl groups of the resin (B) with all the free isocyanate groups of the polymer (C).

Abstract: A self-crosslinking resin comprising a resin containing a blocked isocyanate group, and a resin containing a hydroxyl group, and a carboxyl group or carboxylic anhydride group and attached to the resin by a urethane bond.

Abstract: A self-crosslinkable resin useful as, for example, adhesive compositions and coating compositions. The resin contains complementary reactive groups, that is, a blocked isocyanate group and a hydroxyl group, in the same molecule. The resin is prepared by reacting a hydroxy-containing vinyl monomer with some isocyanate groups on the skeleton of a vinyl polymer having at least two isocyanate groups in the molecule so to introduce a polymerizable double bond into the polymer, and subsequently completely blocking the isocyanate group(s) remaining on the polymer skeleton with a blocking agent, or vice versa. Thereafter an unsaturated monomer component consisting essentially of a hydroxyl-containing vinyl monomer is polymerized with the polymerizable double bond introduced.

Abstract: A thermosetting coating composition comprising as essential components:(a) a hydroxyl group-containing base resin,(b) an alicyclic polyepoxide crosslinking agent, and(c) a catalyst selected from the group consisting of a quaternary ammonium hydroxide and a metal chelate.

Abstract: A dispersion of reactive polymer particles obtained by polymerization of monomer in an organic liquid which dissolves the monomer but does not dissolve a polymer formed from the monomer, in the presence of a dispersion stabilizer composed of a high molecular weight polymer; characterized in that (i) said dispersion stabilizer is a high molecular weight polymer which is obtained by polymerization of an ethylenically unsaturated monomer and soluble in the above organic liquid and which contains a chemically reactive group (A); that (ii) said polymer particles are particles of a high molecular weight polymer which are obtained by polymerization of an ethylenically unsaturated monomer and contain a complementary chemically reactive group (B) capable of mutually reacting with the chemically reactive group (A); and that (iii) the chemically reactive group (A) and the chemically reactive group (B) are present stably in the dispersion.

Abstract: The present invention provides a process for preparing a self-curing resin having a blocked isocyanate group and a hydroxyl group in the molecule from a polymer 500 to 50000 in number average molecular weight and having a tertiary amino group and/or a quaternary ammonium group, and at least two isocyanate groups in the molecule, the process comprising the steps of partly blocking the isocyanate groups in the skeleton of the polymer, and reacting the remaining unblocked isocyanate groups with an alkanolamine to introduce hydroxyl groups into the polymer.

Abstract: The invention provides a self-curing resin which contains one or more blocked isocyanate groups and one or more hydroxyl groups in the molecule and which is produced by polymerizing a monomer component containing an isocyanate-containing, radical-polymerizable monomer as an essential monomer thereof, blocking part of the isocyanate groups in the resulting polymer and then reacting the remaining unblocked isocyanate group or groups with an alkanolamine for hydroxyl group introduction into the polymer.

Abstract: A dispersion of fine particles of a gelled polymer obtainable by copolymerizing and crosslinking a vinyl monomer mixture containing at least 0.5% by weight each of at least two vinyl monomers in the presence of a macromonomer A, which has a molecular chain of poly(12-hydroxystearic acid) and has at least about one polymerizable unsaturated double bond per molecule in average, and a macromonomer B, which is a copolymer of an ethylenic unsaturated monomer and has a solubility parameter value of from 7.5 to 9.2 and about 1.0 to about 1.

Abstract: A thermosetting resin composition comprising as main components(A) an acrylic resin containing in the molecule a carboxyl group, a hydroxyl group and an epoxy group and having an acid value of 15-150 mg KOH/g, a hydroxyl value of 30 mg KOH/g or more, an epoxy equivalent of 3,000-15,000 and a number-average molecular weight of 3,000-30,000,(B) an acrylic resin containing in the molecule a carboxyl group, a hydroxyl group and an epoxy group and having an acid value of 2-10 mg KOH/g, a hydroxyl value of 30 mg KOH/g or more, an epoxy equivalent of 250-2,500 and a number-average molecular weight of 3,000-30,000 and(C) an amino resin,wherein the molar ratio of the carboxyl group of the component (A)/the epoxy group of the component (B) is 1/0.5 to 0.5/1 and the amount of the component (C) is 10-40% by weight based on the total amount of the components (A) to (C). The resin composition is useful for use particularly in top coat paint composition for automobile outer panels.

Abstract: A dispersion of fine particles of a gelled polymer obtainable by copolymerizing and crosslinking a vinyl monomer mixture containing at least 0.5% by weight each of at least two vinyl monomers in the presence of a macromonomer A, which has a molecular chain of poly(12-hydroxystearic acid) and has at least about one polymerizable unsaturated double bond per molecule in average, and a macromonomer B, which is a copolymer of an ethylenic unsaturated monomer and has a solubility parameter value of from 7.5 to 9.2 and about 1.0 to about 1.

Abstract: A method of producing a dispersion of fine particles of a gelled polymer, which comprises polymerizing a vinyl monomer mixture containing at least two vinyl monomers having complementary functional groups capable of being bonded to each other by reaction each in an amount of at least 0.5% by weight, or a vinyl monomer mixture containing at least 0.5% by weight of a polyvinyl monomer containing at least two polymerizable double bonds in an organic liquid incapable of dissolving the polymer formed from the monomer mixture, in the presence of a macromer having a number average molecular weight of at least 1,000 resulting from introduction of polymerizable double bonds into a self-condensation product of 12-hydroxystearic acid, the number of the polymerizable double bonds being 0.7 to 1.0 per molecule of the self-condensation product on an average.

Abstract: A process for preparing a stable dispersion in an aqueous medium of particles of polymer, said process comprising the steps of:(a) reacting at least one radically polymerizable monomer in an organic liquid in the presence of a dispersion stabilizer for the particles to form particles of polymer insoluble in said organic liquid and water, said stabilizer being a resin having in each of its molecules on the average at least 0.3 unit of a polymerizable double bond and a functional group that can be neutralized with an acid or a base, said resin being capable of being emulsifiably dispersed or dissolved in an aqueous medium by neutralization;(b) neutralizing with acids or bases the functional group of the resin as a dispersion stabilizer; and(c) replacing the organic liquid of the resulting dispersion of polymer particles with an aqueous medium.