Abstract: A curable composition, which can be easily decomposed and removed by means of a mixed solution of acid, water, and optionally an organic solvent, is provided. The curable composition contains a resin (A) having a structure of structural formula represented by formula (1) and crosslinkable functional group(s) in one molecule.

Abstract: Resin solid matter having a chemical structure represented by the following chemical formula (1) is contacted with a mixture (A), which contains (a) an acidic compound and (b) water as essential components, and which does not dissolve the resin solid matter, to thereby break the bonds in the chemical structure of the above formula (1). Thereafter, the resultant resin solid matter is removed from a base material by a solvant, whereby both of the base material and the removed resin can be recycled, and the solution for removing the resin can be repeatedly used.

Abstract: Method for the removal of an applied film having a resin containing a unit represented by the following formula (1) as a component thereof, the method including contacting the applied film with a mixture (A) comprising (a) an acidic compound and (b) water.

Abstract: A process for removing a multiple coating film or an adhering substance and a layer of a cured adhesive agent which comprises a step of contacting a coated article (A) containing a multiple coating film having a lower coating layer formed on a substrate and an upper coating layer formed on the lower coating layer or an adhering substance (B) being allowed to adhere to a substrate by a layer of a cured adhesive agent with a mixture (C) comprising an acidic compound (a) and water as an essential component, the lower coating layer containing a cured binder resin having a chemical structure shown by the following chemical formula (1) and the layer of the cured adhesive agent containing a cured binder resin having a chemical structure shown by the above-mentioned chemical formula (1).

Abstract: A process for forming a cured paint film from a paint containing, as a binder, a resin containing a carbonyl group, or a resin, or a resin mixture containing a carbonyl group and a carboxyl group or a paint containing, as a binder, a resin containing a resin or a resin mixture containing a group which forms a carboxyl group in the subsequent contact step with a hydrazine compound or polyhydrazide compound. The uncured paint film, which contains a carbonyl group, or a carbonyl group and a carboxyl group or a group that forms a carboxyl group, is subjected to a step of curing the paint film by allowing the uncured paint film to contact with a hydrazine compound or a polyhydrazide compound.

Abstract: A resinous composition for two-liquid type water paint crosslinkable at the normal temperature which has a long pot life and which is superior in properties such as hardness, gloss, solvent resistance and water resistance is disclosed. A resinous composition comprises: (A) a colloidal dispersion or emulsion obtained by copolymerizing a monomer mixture comprising a carbonyl group-containing unsaturated monomer, carboxyl group-containing unsaturated monomer and other unsaturated monomers to form a copolymer, neutralizing the copolymer with an alkali, dissolving or emulsifying it into water, and adjusting the pH to above 7; and (B) an easily water soluble dihydrazide compound having from 1 to 5 carbon atoms.

Abstract: A resinous composition for water paint crosslinkable at the normal temperature is provided, which is suitable for painting interiors and exteriors of buildings, bridges, vehicles and et al, which is non-odored, as well as which has advantages in safe and hygienic aspects. A resinous composition for a water paint, which is obtained by blending an aqueous dispersion of a carbonyl group-containing copolymer (A) with a carbonyl group-containing aqueous polyurethane resin (B) at the ratio of 100 parts by weight of solids in (A) to 5.about.150 parts by weight of (B), and then adding as a crosslinking agent a hydrazide compound having at least 2 hydrazide groups per one molecule (C) at the ratio of 0.01.about.2 moles of (C) to 1 mole of carbonyl group contained in the said (A) and (B) components, wherein the said polyurethane resin (B) being obtained by copolymerizing an unsaturated polyurethane resin obtained by the reaction of a diisocyanate compound with a polyol having a number average molecular weight of 60.

Abstract: An air-drying aqueous coating composition for electrodeposition comprising[A] a water-solubilized product or a water-dispersed product obtained by reacting (A-1) an epoxy resin and (A-2) a (semi)drying oil fatty acid-modified vinyl polymer having an acid value of 10 to 200 in such proportions that the solids weight ratio of the component (A-1) to the component (A-2) is from 90/10 to 5/95, and[B] an amphoteric organic solvent having affinity for component [A].

Abstract: An air-drying aqueous coating composition for eletrodeposition comprising[A] water-solubilized product or a water-dispersed product obtained by reacting (A-1) an epoxy resin and (A-2) a maleinized product of a (semi)drying oil fatty acid-modified vinyl polymer having an acid value of 10 to 200 in such proportions that the solids weight ratio of the component (A-1) to the component (A-2) is from 90/10 to 5/95, and[B] an amphoteric organic solvent having affinity for component [A].

Abstract: An aqueous coating composition which is characterized in that it contains an aqueous solution or dispersion of a resin formed through copolymerization of a monomeric mixture composed of(A) an ethylenically unsaturated monomer containing at least one urethane linkage and at least two non-conjugated double bonds per molecule 5-98 parts by weight,(B) an ethylenically unsaturated carboxylic 0.5-20 parts by weight, and(C) an ethylenically unsaturated monomer or monomers other than (A) and (B) 0-94.5 parts by weight, the total sum of (A), (B) and (C) components being 100 parts by weight.

Abstract: An aqueous emulsion composition which is the product of emulsion polymerization in water of at least one radical-polymerizable unsaturated monomer in the presence of a water-soluble resin having a graft-polymerizable unsaturated group in the side chain.

Abstract: An aqueous emulsion composition which is the product of emulsion polymerization in water of at least one radical-polymerizable unsaturated monomer in the presence of a water-soluble resin having a graft-polymerizable unsaturated group in the side chain.

Abstract: An aqueous resin composition comprising a neutralization product of an isocyanurate group-containing maleinized alkyd resin having an acid value of 5 to 65 in an aqueous medium, said maleinized alkyd resin being prepared by maleinizing an alkyd resin having an acid value of not more than 10 and a hydroxyl value of not more than 10 which is the product of condensation reaction of(A) 20 to 60% by weight of at least one of drying or semi-drying oils and fatty acids,(B) 10 to 45% by weight of at least one tris(hydroxyalkyl) isocyanurate,(C) 0 to 45% by weight of at least one polyhydric alcohol other than the component (B),(D) 10 to 45% by weight of at least one polybasic acid, and(E) 0 to 15% by weight of at least one monobasic acidand an aqueous emulsion resin composition obtained by emulsion polymerization of a radical polymerizable unsaturated monomer in an aqueous medium in the presence of the aforesaid neutralization product.

Abstract: A cellulose derivative-containing emulsion composition which is the product of emulsion polymerization of at least one ethylenically unsaturated monomer in the presence of a water-solubilized product of a cellulose derivative-modified vinyl copolymer having an acid value of from about 3 to about 150, said vinyl copolymer being obtained by copolymerizing a cellulose derivative with an ethylenically unsaturated monomeric component composed of an ethylenically unsaturated acid and another ethylenically unsaturated monomer.

Abstract: An oxidation-curable emulsion composition containing a cellulose derivative, said composition being prepared by polymerizing in emulsion a mixture consisting of at least one radical-polymerizable unsaturated monomer and at least one cellulose derivative in the presence of an oxidation-curable water-soluble resin.

Abstract: An emulsion composition which is the product of emulsion polymerization of a mixture of at least one radical-polymerizable unsaturated monomer and at least one cellulose derivative in the presence of a water-soluble resin having a graft-polymerizable unsaturated group in the side chain.

Abstract: An aqueous coating composition comprising a resin in a water-soluble or water-dispersible form as a film-forming component, said resin being a copolymer of (A) a fatty acid-modified acrylic monomer comprising the reaction product of an unsaturated fatty acid having at least two non-conjugated double bonds with a hydroxyl-containing acrylic or methacrylic ester, (B) an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, and (C) an unsaturated monomer having a Q value, determined by the Q-e theory, of at least 0.1.

Abstract: An aqueous coating composition comprising as film-forming components[I] a water-soluble or water-dispersible product of a resin (i) obtained by copolymerizing(A) a fatty acid-modified acrylic monomer composed of the reaction product between an unsaturated fatty acid having at least two non-conjugated double bonds and a hydroxyl-containing ester of acrylic or methacrylic acid,(B) an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, and(C) an unsaturated monomer having a Q value in the Q-e theory of at least 0.1, and[II] a vinyl polymer emulsion obtained by polymerizing an unsaturated vinyl monomer in the presence of a water-soluble oxidation-curable resin (ii) as a dispersion stabilizer.

Abstract: An aqueous resin composition cross-linkable by oxidation and prepared by dissolving a radical-polymerizable poly-functional monomer in an aqueous solution of at least one of water-soluble resins having a drying oil fatty acid group or semi-drying oil fatty acid group and neutralized maleates of synthetic petroleum resins having an unsaturated bond of the vinyl or non-vinyl type, and polymerizing the monomer in the solution.

Abstract: An aqueous film-forming composition is prepared by radially polymerizing unsaturated vinyl monomer with an emulsion stabilizer of oxidation curing water-soluble resin and impregnating the obtained emulsion with a compound represented by the general formula: ##STR1##