Abstract: Disclosed herein is a clear paint composition, comprising (A) an acrylic copolymer comprising from 35 to 50 wt % ?-caprolactone structural units, based on the resin solid fraction, and wherein the hydroxyl number is from 200 to 340 mgKOH/g and the weight average molecular weight is from 5,000 to 15,000 and (B) a non-yellowing type polyisocyanate compound, wherein the isocyanate group of the (B) component is included in a proportion of from 0.5 to 2 equivalents per 1 equivalent of hydroxyl group of the (A) component, wherein the Young's modulus of the hardened paint film obtained from said paint composition is not more than 1.5 Pa, wherein the molecular weight of intercrosslinking of the cured coating film (Mc) is not more than 350 g/mol, and wherein the glass transition temperature (Tg) of the hardened paint film is at least 65° C.

Abstract: Disclosed herein is a paint composition comprising a hydroxyl group containing resin (A), comprising structural units based on 2,2-dimethylolalkanoic acid, having a hydroxyl group value of from 200 to 400 mgKOH/g, and comprising less than 25 weight % in the resin solid fraction of structural units based on a lactone compound; a hydroxyl group containing resin (B), having a hydroxyl group value from 50 to 200 mgKOH/g, and comprising from 25 to 75 weight % in the resin solid fraction of structural units based on a lactone compound; and a crosslinking agent (C) comprising at least two OH-reactive functional groups per molecule; wherein the resin solid fraction weight ratio (A)/(B) of the hydroxyl group containing resin (A) and the hydroxyl group containing resin (B) is from 90/10 to 10/90.

Abstract: Disclosed herein is a heat-hardenable paint composition comprising a base resin, wherein the base resin comprises (A) a lactone modified resin comprising hydroxyl groups, wherein 20 to 70 weight percent of the structural units are based on the lactone compound, and the hydroxyl group value is from 50 to 400 mgKOH/g, and (B) an acrylic resin comprising hydroxyl groups and cyclic structures, wherein 10 to 80 weight percent of structural units are based on a radically polymerizable monomer comprising a cyclic structure, the hydroxyl group value is from 50 to 150 mgKOH/g, and the crosslinking resin is an isocyanate compound, wherein the weight ratio of the solid fractions of (A):(B) in the base resin is from 95:5 to 20:80.

Abstract: Disclosed herein is a paint composition, comprising a hydroxyl group containing resin (A), having a hydroxyl group value of from 200 to 400 mgKOH/g, and comprising in a resin solid fraction less than 25 weight % of structural units based on a lactone compound, a hydroxyl group containing resin (B), having a hydroxyl group value of from 50 to 200 mgKOH/g, and comprising in the resin solid fraction from 25 to 75 weight % of structural units based on a lactone compound, and a crosslinking agent (C) comprising at least one functional group which reacts with hydroxyl groups, wherein the proportions by weight (A)/(B) of the hydroxyl group containing resin (A) and the hydroxyl group containing resin (B), based on the resin solid fraction, are from 90/10 to 10/90.

Abstract: Disclosed herein is a heat-hardenable paint composition comprising a base resin, wherein the base resin comprises (A) a lactone modified resin comprising hydroxyl groups, wherein 20 to 70 weight percent of the structural units are based on the lactone compound, and the hydroxyl group value is from 50 to 400 mgKOH/g, and (B) an acrylic resin comprising hydroxyl groups and cyclic structures, wherein 10 to 80 weight percent of structural units are based on a radically polymerizable monomer comprising a cyclic structure, the hydroxyl group value is from 50 to 150 mgKOH/g, and the crosslinking resin is an isocyanate compound, wherein the weight ratio of the solid fractions of (A):(B) in the base resin is from 95:5 to 20:80.

Abstract: Disclosed herein is a paint composition comprising a hydroxyl group containing resin (A), comprising structural units based on 2,2-dimethylolalkanoic acid, having a hydroxyl group value of from 200 to 400 mgKOH/g, and comprising less than 25 weight % in the resin solid fraction of structural units based on a lactone compound; a hydroxyl group containing resin (B), having a hydroxyl group value from 50 to 200 mgKOH/g, and comprising from 25 to 75 weight % in the resin solid fraction of structural units based on a lactone compound; and a crosslinking agent (C) comprising at least two OH-reactive functional groups per molecule; wherein the resin solid fraction weight ratio (A)/(B) of the hydroxyl group containing resin (A) and the hydroxyl group containing resin (B) is from 90/10 to 10/90.

Abstract: Disclosed herein is a paint composition, comprising a hydroxyl group containing resin (A), having a hydroxyl group value of from 200 to 400 mgKOH/g, and comprising in a resin solid fraction less than 25 weight % of structural units based on a lactone compound, a hydroxyl group containing resin (B), having a hydroxyl group value of from 50 to 200 mgKOH/g, and comprising in the resin solid fraction from 25 to 75 weight % of structural units based on a lactone compound, and a crosslinking agent (C) comprising at least one functional group which reacts with hydroxyl groups, wherein the proportions by weight (A)/(B) of the hydroxyl group containing resin (A) and the hydroxyl group containing resin (B), based on the resin solid fraction, are from 90/10 to 10/90.

Abstract: Disclosed herein is a clear paint composition, comprising (A) an acrylic copolymer comprising from 35 to 50 wt % ?-caprolactone structural units, based on the resin solid fraction, and wherein the hydroxyl number is from 200 to 340 mgKOH/g and the weight average molecular weight is from 5,000 to 15,000 and (B) a non-yellowing type polyisocyanate compound, wherein the isocyanate group of the (B) component is included in a proportion of from 0.5 to 2 equivalents per 1 equivalent of hydroxyl group of the (A) component, wherein the Young's modulus of the hardened paint film obtained from said paint composition is not more than 1.5 Pa, wherein the molecular weight of intercrosslinking of the cured coating film (Mc) is not more than 350 g/mol, and wherein the glass transition temperature (Tg) of the hardened paint film is at least 65° C.

Abstract: The provision of a paint composition that affords a paint film of excellent acid rain resistance, contamination resistance, water resistance, weather resistance and painting workability, with particularly excellent resistance to vehicle wash damage; and a painting and finishing method, and painted articles.

Abstract: The present invention relates to an ultraviolet-curable coating composition comprising: (A) an ultraviolet curable four or more functional groups-containing polyfunctional (meth)acrylate having four or more (meth)acryloyl groups in the molecule and a number average molecular weight of 300 to 2,000, (B) a lactone-modified polymer of polyhydric alcohol mono(meth)acrylate containing 20 to 60 percents by weight of ?-caprolactone ring-opening addition product and having a hydroxyl value derived from the lactone modification of 100 to 180 mgKOH/g, and/or a lactone-modified polyester resin containing 10 to 50 percents by weight of lactone ring-opening addition product and having a hydroxyl value of 50 to 180 mgKOH/g, (C) a non-yellow polyisocyanate compound and/or an amino resin, (D) a light stabilizer and, (E) a photopolymerization initiator, wherein a weight ratio of component (A) against to a total weight of component Components (B) and (C) is 10:90 to 50:50, a weight ratio of component (B) against to component

Abstract: The present invention relates to an ultraviolet-curable coating composition comprising: (A) an ultraviolet curable four or more functional groups-containing polyfunctional (meth)acrylate having four or more (meth)acryloyl groups in the molecule and a number average molecular weight of 300 to 2,000, (B) a lactone-modified polymer of polyhydric alcohol mono(meth)acrylate containing 20 to 60 percents by weight of ?-caprolactone ring-opening addition product and having a hydroxyl value derived from the lactone modification of 100 to 180 mgKOH/g, and/or a lactone-modified polyester resin containing 10 to 50 percents by weight of lactone ring-opening addition product and having a hydroxyl value of 50 to 180 mgKOH/g, (C) a non-yellow polyisocyanate compound and/or an amino res in, (D) a light stabilizer and, (E) a photopolymerization initiator, wherein a weight ratio of component (A) against to a total weight of component Components (B) and (C) is 10:90 to 50:50, a weight ratio of component (B) against to component

Abstract: A coating film which has no problems in its film properties and is superior in hiding power for hiding sand scratches on the substrate and exhibiting a continuous plated metal-like appearance is formed in a stable manner, by coating the substrate with a primer (A) and/or a first metallic paint (B) containing non-leafing type aluminum flakes (a) having thicknesses in the range from 0.1 to 1 &mgr;m and an average particle size of 1-60 &mgr;m and, then, coating with a second metallic paint (C) containing small, thin metal flakes (b) having thicknesses not greater than 0.08 &mgr;m and an average particle size of 5-40 &mgr;m.

Abstract: An isocyanate-curing coating material is disclosed which essentially consists of (A) an agent formed of a hydroxyl group-containing polymer having a weight average molecular weight in the range of 1000-20000 and (B) a polyisocyanate compound as a curing agent containing at least three isocyanate groups in the molecular unit thereof and having a weight average molecular weight in the range of 400-3000 and incorporating (A) the agent and (B) the curing agent in such amounts that the isocyanate groups in (B) the curing agent amounts to 0.5-2 equivalent weights per equivalent weight of the hydroxyl group in (A) the agent. A method for spray coating the isocyanate-curing coating material is also disclosed which comprises the steps of mixing (A) the agent with (B) the curing agent in a coating device, heating the resultant mixture therein to a temperature in the range of 35-80.degree. C., and spraying the hot mixture directly on a given object with the coating device.