A method for forming a multilayer coated film includes step (1) of applying an aqueous intermediate coating composition (A), step (2) of applying an aqueous base coating composition (B), step (3) of applying a clear coating composition (C), and step (4) of heat-curing the coated films. The coating composition (A) contains a specific hydroxyl group-containing acrylic resin (a1), a specific polyurethane resin (a2), a specific hydroxyl group-containing polyester resin (a3), a melamine resin (a4), and an active methylene-blocked polyisocyanate compound (a5). A ratio of the resin (a1) to the resin (a2) falls within a specific range. The heat-cured coated film of the coating composition (A) has a specific elongation at break, Young's modulus and Tukon hardness. The coating composition (C) contains a hydroxyl group-containing acrylic resin (c1) and an allophanate group-containing polyisocyanate compound (c2).

An aqueous dispersion of a capsule composed of a polymeric shell surrounding a core, the core containing an amine blocked isocyanate, the amine blocked isocyanate comprises at least two isocyanate groups blocked by a blocking group, the blocking groups are independently from each other represented by a secondary amine The aqueous dispersion is suitable as reactive binder chemistry in coatings and inks.

Described herein is a blocked polyisocyanate crosslinking agent obtained from reactions of components including a). at least one polyisocyanate selected from the group consisting of aliphatic polyisocyanate, cycloaliphatic polyisocyanate and polyisocyanate-functional polymer and b). at least one beta-diketone. Also described herein is a method of preparing a blocked polyisocyanate crosslinking agent as well as coating compositions including the blocked polyisocyanate crosslinking agent.

Provided is an aqueous coating composition which has excellent storage stability and whereby high coating film performance in terms of hardness, water resistance, etc., can be exhibited even when the aqueous coating composition is cured at a relatively low temperature. Disclosed is an aqueous coating composition which contains (A) a resin containing hydroxyl groups and carboxyl groups, (B) a blocked polyisocyanate compound, (C) a phosphate-group-containing compound, and (D) a basic compound, and which has a pH in the range of 7.0-8.2, wherein the basic compound (D) contains a specific quantity of (D1) a basic compound which has an acid dissociation constant (PKa) in the range of 7.0-8.5 and a boiling point in the range of 100-200° C.

Provided is an aqueous coating composition that can exhibit high coating film performance even when cured at a relatively low temperature. The present invention pertains to an aqueous coating composition comprising (A) a hydroxyl group-containing resin and (B) a blocked polyisocyanate compound. The weight average molecular weight of the blocked polyisocyanate compound (B) is in a range of 20,000-200,000.

This invention provides a polymer thick film electrically conductive paste composition, comprising conductive metal powder, a resin blend of polyol and phenoxy resin, blocked aliphatic polyisocyanate and one or more polar, aprotic solvents. In one embodiment the paste composition is used to form electrically conductive adhesive. In another embodiment the paste composition is used to form an electrically conductive polymer thick film.

The present invention relates to an aqueous coating composition which has excellent storage stability, while being capable of forming a coating film that exhibits excellent chipping resistance and excellent finish appearance in a dust part and in a film formation part. The present invention provides an aqueous coating composition which contains (A) a urethane resin that is obtained from constituents including (a1) a polyisocyanate component and (a2) a polyol component containing (a2-1) a polyether polyol and (a2-2) a polycarbonate polyol, (B) at least one hydroxyl group-containing resin that is selected from among (B1) hydroxyl group-containing acrylic resins and (B2) hydroxyl group-containing polyester resins, (C) an organic solvent that has a solubility parameter within the range of from 8.8 to 10.1, and (D) water, wherein based on 100 parts by mass of the resin solid content in the aqueous coating composition, the content of the urethan resin (A) is within the range of from 60 to 85 parts by mass and the content of the organic solvent (C) is within the range of from 5 to 30 parts by mass.

The present invention relates to an aqueous coating composition which has excellent storage stability, while being capable of forming a coating film that exhibits excellent chipping resistance and excellent finish appearance in a dust part and in a film formation part. The present invention provides an aqueous coating composition which contains (A) a urethane resin that is obtained from constituents including (a1) a polyisocyanate component and (a2) a polyol component containing (a2-1) a polyether polyol and (a2-2) a polycarbonate polyol, (B) at least one hydroxyl group-containing resin that is selected from among (B1) hydroxyl group-containing acrylic resins and (B2) hydroxyl group-containing polyester resins, (C) an organic solvent that has a solubility parameter within the range of from 8.8 to 10.1, and (D) water, wherein based on 100 parts by mass of the resin solid content in the aqueous coating composition, the content of the urethan resin (A) is within the range of from 60 to 85 parts by mass and the content of the organic solvent (C) is within the range of from 5 to 30 parts by mass.

The present invention provides a coating film having a structure represented by the following general formula (1) (in the formula, R.sup.11 is a residue formed by removing one isocyanate group from a polyisocyanate, and R.sup.12 is an alkyl group or an alkoxy group having 2 to 12 carbon atoms, R.sup.13 is a residue formed by removing one hydroxyl group from a polyol), wherein a König hardness of the coating film is 20 or more, in an SS curve measurement of a tensile test, the coating film has an elastic deformation region and a plastic deformation region, and in the SS curve measurement, a stress at an inflection point stress between the elastic deformation region and the plastic deformation region is 5 MPa or more. ##STR00001##

A blocked polyisocyanate composition containing a blocked polyisocyanate obtained from a polyisocyanate and at least one blocking agent, wherein the blocking agent contains a compound represented by general formula (I) shown below, and the amount of methane tetracarbonyl structures represented by general formula (II) shown below, relative to the total molar amount within the blocked polyisocyanate of bonded structures in which the compound represented by general formula (I) is bonded to the polyisocyanate, is at least 0.5 mol % but not more than 10 mol %.