Abstract: The present invention aims to provide a composition having excellent stain resistance, which is mainly used for a one-pack coating material. A further aim of the invention is to achieve excellent storage stability and maintain excellent stain resistance even after storage by using the composition. The invention provides a resin composition for a one-pack coating material including: component (A) that is a polymer having a main chain substantially composed of an acrylic copolymer chain, and having, at a terminal of the main chain and/or in a side chain, at least one silicon group bonded to a hydrolyzable group; and component (B) that is a specific silicon compound; and if necessary, component (C) that is a compound having an amino group and/or a group hydrolyzable to an amino group; and component (D) that is another organic resin. The composition has excellent storage stability and maintains excellent stain resistance even after storage.

Abstract: The present invention has its objects to provide a curable composition for coatings which can provide coatings or paint films excellent in acid resistance, scratch resistance, stain resistance and heat curability, with very good weather resistance and appearance; and coated articles and a resin composition obtained from the curable composition.

Abstract: A curable composition suitable as a top coat which contains a vinyl copolymer (A) having a main chain consisting of a vinyl copolymer chain, in which a reactive silyl group is combined with a carbon atom at the main chain end and/or side chain of the copolymer, the copolymer having an alcoholic hydroxyl group at its main chain end and/or side chain and having an alcoholic hydroxyl group equivalent of 400 to 2000 g/mole, a non-aqueous hydroxyl group-containing polymer dispersion (B), a silicon-containing compound and/or its partical hydrolysis condensation product (C), and a curing catalyst (D), wherein the amount of (B) is 5 to 100 parts by weight, in terms of solid matter, based on 100 parts by weight of (A), the amount of (C) is 2 to 100 parts by weight based on 100 parts by weight of (A), and the amount of (D) is 0.001 to 10 parts by weight based on 100 parts by weight of the total amount of solid matters of (A), (B) and (C), and a coated material using the same.

Abstract: A curable composition suitable as top coats having an improved excellent acid resistance as well as excellent properties such as thermosetting property, appearance, water resistance, scratch resistance and weatherability, which comprises (A) a vinyl copolymer having a main chain substantially composed of a vinyl copolymer and having in its molecule both at least one hydrolyzable silyl group and at least one alcoholic hydroxyl group, (B) a silanol group-containing organopolysiloxne having at least one silanol group, and (C) a curing catalyst.

Abstract: A composition including (A) a hydroxyl group-containing acrylic resin, (B) an acrylic copolymer containing an alkoxysilyl group having the formula (I): ##STR1## (C) a polyorganosiloxane and (D) a curing catalyst. The composition can give the film with excellent weatherability, stain resistance, acid resistance, water repellency and durability and with no bad-smelling odor.

Abstract: A thermosetting composition comprising (A) a carboxyl group-containing polyol resin, (B) a hydrolyzable silyl group-containing polymer, and at least one member selected from the group consisting of (C) a dehydrating agent and (D) an alcohol. The composition of the present invention is excellent in the physical properties of the film as well as the storage stability of the coating composition compared to the known compositions containing the curing catalyst.

Abstract: The curable resin having a number average molecular weight of 600 to 6000 and at least two hydrolyzable silyl groups which is prepared by reacting an aliphatic polyester resin having acryloyl group and alcoholic hydroxyl group with an isocyanate silane compound: ##STR1## reacting the obtained reaction product with an aminosilane compound: ##STR2## and reacting the obtained reaction product with a monofunctional isocyanate: OCN-R.sup.5 and/or a polyfunctional isocyanate; and the composition containing the resin. The curable resin and the composition are excellent in acid resistance such as acid resin resistance, scratch resistance, solvent resistance, flexibility, and the like.

Abstract: A coated material obtained by applying a coat containing a metallic powder and/or a coloring pigment to a substrate and further applying a topcoat clear coating thereon, wherein said topcoat clear coating is a heat-hardening coat which contains a composition comprising a hydroxyl group-containing resin, a hydrolyzable silyl group-containing polymer and a hardening catalyst as the main component. This coated material is excellent in, for example, appearance, acid resistance, staining resistance, adhesiveness and hardness.