Abstract: An object of the invention is to provide a urethane resin composition containing a biomass raw material and having excellent moisture permeability and excellent film strength. The invention provides a urethane resin composition containing a urethane resin (X), the urethane resin (X) containing, as essential raw materials, a polyol (A) that contains a polyol (a1) having an oxyethylene group, and a polyisocyanate (B), in which the polyol (A) further contains a polyester polyol (a2) containing a biomass-derived glycol (i) and a crystalline polybasic acid (ii) as raw materials, and the polyol (A) has a hydroxyl equivalent in a range of 400 g/eq to 600 g/eq. In addition, the invention provides a moisture-permeable film which is formed of the urethane resin composition.

Abstract: An object to be achieved by the present invention is to provide a method for producing an artificial leather on a practically usable level without using an organic solvent and without requiring a crosslinking step for a crosslinking agent. The present invention provides a method for producing an artificial leather having a cured product layer of a moisture-curing urethane hot-melt resin composition, wherein the moisture-curing urethane hot-melt resin composition contains a urethane prepolymer having an isocyanate group and does not contain a crosslinking agent having a hydroxyl group and/or an amino group, the method including applying the moisture-curing urethane hot-melt resin composition to a substrate at a coating weight of 0.03 to 0.5 kg/m2 so as to form a cured product layer of the moisture-curing urethane hot-melt resin composition.

Abstract: A moisture-permeable waterproof fabric includes: a cloth (i), an adhesive layer (ii), and a surface skin layer (iii). The adhesive layer (ii) is formed from a moisture-curable polyurethane hot melt resin composition that contains a urethane prepolymer (C) having an isocyanate group, and the urethane prepolymer (C) is a reaction product of a polyisocyanate (B) and a polyol (A) containing a biomass-derived polyester polyol (a1). The surface skin layer (iii) is formed from a urethane resin composition that contains a urethane resin (R) containing a polyol (P) and a polyisocyanate (Q) as essential raw materials thereof, and the polyol (P) contains a polyol (P1) having an oxyethylene group and a specific polyester polyol (P2).

Abstract: An object of the invention is to provide a moisture-curable polyurethane resin composition containing a biomass raw material and having excellent adhesiveness to a fabric (particularly, a water-repellent fabric) and excellent film strength. The invention provides a moisture-curable polyurethane hot-melt resin composition containing: a urethane prepolymer (i) having an isocyanate group, which is a reaction product of a polyol (A) and a polyisocyanate (B), the polyol (A) containing a polyester polyol (a1) containing, as raw materials, a biomass-derived polybasic acid (x) and a biomass-derived glycol (y), and another polyester polyol (a2). In addition, the invention provides an adhesive containing the moisture-curable polyurethane hot-melt resin composition.

Abstract: An object of the invention is to provide a urethane resin composition containing a biomass raw material and having excellent moisture permeability and excellent film strength. The invention provides a urethane resin composition containing a urethane resin (X), the urethane resin (X) containing, as essential raw materials, a polyol (A) that contains a polyol (a1) having an oxyethylene group, and a polyisocyanate (B), in which the polyol (A) further contains a polyester polyol (a2) containing a biomass-derived glycol (i) and a crystalline polybasic acid (ii) as raw materials, and the polyol (A) has a hydroxyl equivalent in a range of 400 g/eq to 600 g/eq. In addition, the invention provides a moisture-permeable film which is formed of the urethane resin composition.

Abstract: In the present invention, there is provided a moisture-curable polyurethane hot-melt resin composition containing an urethane prepolymer (i) having an isocyanate group, which is a reaction product of a polyol (A) and a polyisocyanate (B), the polyol (A) comprising a polyester polyol (al) which uses a polybasic acid (x) derived from biomass and a glycol (y) derived from biomass as raw materials. Further, the present invention provides an adhesive containing the moisture-curable polyurethane hot-melt resin composition. The biomass-derived polybasic acid (x) is preferably sebacic acid and/or succinic acid. The biomass-derived glycol (y) is preferably 1,3-propanediol and/or 1,4-butanediol. The moisture-curable polyurethane resin composition preferably has a biomass degree of 40% or more.

Abstract: A method for producing a porous material includes processing a urethane resin composition containing a urethane resin (A) and a solvent (B) by a wet film forming process, in which the solvent (B) satisfies the following conditions: a difference between a Hansen solubility parameter of the solvent (B) (B-HSP) and a Hansen solubility parameter of the urethane resin (A) (A-HSP) is in the range of 3 to 8 (J/cm3)1/2 and a difference between the Hansen solubility parameter of the solvent (B) (B-HSP) and a Hansen solubility parameter of water (W-HSP) is in the range of 31.5 to 38 (J/cm3)1/2. The Hansen solubility parameter of the solvent (B) preferably has a dispersion term (?D) in the range of 15.5 to 21.0 MPa0.5, a polar term (?P) in the range of 7.0 to 14.5 MPa0.5, and a hydrogen bond term (?H) in the range of 4.5 to 11.0 MPa0.5.

Abstract: A method for producing a porous material includes processing a urethane resin composition containing a urethane resin (A) and a solvent (B) by a wet film forming process, in which the solvent (B) satisfies the following conditions: a difference between a Hansen solubility parameter of the solvent (B) (B-HSP) and a Hansen solubility parameter of the urethane resin (A) (A-HSP) is in the range of 3 to 8 (J/cm3)1/2 and a difference between the Hansen solubility parameter of the solvent (B) (B-HSP) and a Hansen solubility parameter of water (W-HSP) is in the range of 31.5 to 38 (J/cm3)1/2. The Hansen solubility parameter of the solvent (B) preferably has a dispersion term (?D) in the range of 15.5 to 21.0 MPa0.5, a polar term (?P) in the range of 7.0 to 14.5 MPa0.5, and a hydrogen bond term (?H) in the range of 4.5 to 11.0 MPa0.5.

Abstract: The present invention is directed to a method for producing a semi-IPN composite, including: mixing a polyurethane (A) and a polymerization product (B) of a hydrophilic acrylic monomer (b1) and an acrylic monomer (b2) having a hydrolyzable silyl group; and causing the polymerization product (B) to undergo crosslinking. The hydrophilic acrylic monomer (b1) preferably includes an acrylic monomer (b1-1) having an amide group and an acrylic monomer (b1-2) having an oxyethylene group. Further, the polymerization ratio (molar ratio) of the acrylic monomer (b1-1) having an amide group, the acrylic monomer (b1-2) having an oxyethylene group, and the acrylic monomer (b2) having a hydrolyzable silyl group {(b1-1)/(b1-2)/(b2)} is preferably in the range of 50/49.5/0.5 to 89/1/10.

Abstract: An object to be achieved by the present invention is to provide a method for producing an artificial leather on a practically usable level without using an organic solvent and without requiring a crosslinking step for a crosslinking agent. The present invention provides a method for producing an artificial leather having a cured product layer of a moisture-curing urethane hot-melt resin composition, wherein the moisture-curing urethane hot-melt resin composition contains a urethane prepolymer having an isocyanate group and does not contain a crosslinking agent having a hydroxyl group and/or an amino group, the method including applying the moisture-curing urethane hot-melt resin composition to a substrate at a coating weight of 0.03 to 0.5 kg/m2 so as to form a cured product layer of the moisture-curing urethane hot-melt resin composition.

Abstract: The present invention relates to a method for producing a semi-IPN composite, the method including polymerizing a hydrophilic monofunctional acrylate (b1) and a polyfunctional acrylate (b2) in a solution of a polyurethane (A) prepared using an aliphatic polyisocyanate and/or an alicyclic polyisocyanate as a raw material. The present invention also relates to a method for producing a synthetic leather that includes a layer obtained by drying the semi-IPN composite obtained by the above production method. One object of the present invention is to provide a method for producing a semi-IPN composite excellent in stain resistance. The semi-INP composite obtained by the production method of the present invention is excellent in stain resistance. Therefore, the semi-IPN composite can be used particularly preferably for skin and topcoat layers of synthetic leathers for vehicles.

Abstract: A problem to be solved by the present invention is to provide a moisture-permeable film which is excellent in moisture permeability and water swelling resistance. The present invention relates to a moisture-permeable film formed by a composition containing polyurethane (A) and a hydrophilic acrylic polymer (B). The moisture-permeable film of the present invention is excellent in the moisture permeability and the water swelling resistance. Accordingly, the moisture-permeable film of the present invention can be preferably used as the moisture-permeable film used in producing moisture-permeable waterproof cloth for clothing, medical, and hygiene; and synthetic leather. The hydrophilic acrylic polymer (B) is preferably a polymer of a hydrophilic acrylic monomer (b1) containing an acrylic monomer (b1-1) having an amide group and an acrylic monomer (b1-2) having an oxyethylene group.

Abstract: The present invention relates to a method for producing a semi-IPN composite, the method including polymerizing a hydrophilic monofunctional acrylate (b1) and a polyfunctional acrylate (b2) in a solution of a polyurethane (A) prepared using an aromatic polyisocyanate as a raw material. The present invention also relates to a method for producing a moisture-permeable film that is obtained by drying the semi-IPN composite obtained by the above production method. One object of the present invention is to provide a method for producing a semi-IPN composite excellent in moisture permeability, water-swelling resistance, and stain resistance. The semi-INP composite obtained by the production method of the present invention is excellent in moisture permeability, water-swelling resistance, and stain resistance. Therefore, the semi-IPN composite can be preferably used for moisture-permeable waterproof fabrics for clothing, medical, and sanitary use and for skin and topcoat layers of synthetic leathers.

Abstract: The present invention is directed to a method for producing a semi-IPN composite, including: mixing a polyurethane (A) and a polymerization product (B) of a hydrophilic acrylic monomer (b1) and an acrylic monomer (b2) having a hydrolyzable silyl group; and causing the polymerization product (B) to undergo crosslinking. The hydrophilic acrylic monomer (b1) preferably includes an acrylic monomer (b1-1) having an amide group and an acrylic monomer (b1-2) having an oxyethylene group. Further, the polymerization ratio (molar ratio) of the acrylic monomer (b1-1) having an amide group, the acrylic monomer (b1-2) having an oxyethylene group, and the acrylic monomer (b2) having a hydrolyzable silyl group {(b1-1)/(b1-2)/(b2)} is preferably in the range of 50/49.5/0.5 to 89/1/10.

Abstract: The present invention relates to a method for producing a semi-IPN composite, the method including polymerizing a hydrophilic monofunctional acrylate (b1) and a polyfunctional acrylate (b2) in a solution of a polyurethane (A) prepared using an aromatic polyisocyanate as a raw material. The present invention also relates to a method for producing a moisture-permeable film that is obtained by drying the semi-IPN composite obtained by the above production method. One object of the present invention is to provide a method for producing a semi-IPN composite excellent in moisture permeability, water-swelling resistance, and stain resistance. The semi-INP composite obtained by the production method of the present invention is excellent in moisture permeability, water-swelling resistance, and stain resistance. Therefore, the semi-IPN composite can be preferably used for moisture-permeable waterproof fabrics for clothing, medical, and sanitary use and for skin and topcoat layers of synthetic leathers.

Abstract: The present invention relates to a method for producing a semi-IPN composite, the method including polymerizing a hydrophilic monofunctional acrylate (b1) and a polyfunctional acrylate (b2) in a solution of a polyurethane (A) prepared using an aliphatic polyisocyanate and/or an alicyclic polyisocyanate as a raw material. The present invention also relates to a method for producing a synthetic leather that includes a layer obtained by drying the semi-IPN composite obtained by the above production method. One object of the present invention is to provide a method for producing a semi-IPN composite excellent in stain resistance. The semi-INP composite obtained by the production method of the present invention is excellent in stain resistance. Therefore, the semi-IPN composite can be used particularly preferably for skin and topcoat layers of synthetic leathers for vehicles.

Abstract: A problem to be solved by the present invention is to provide a moisture-permeable film which is excellent in moisture permeability and water swelling resistance. The present invention relates to a moisture-permeable film formed by a composition containing polyurethane (A) and a hydrophilic acrylic polymer (B). The moisture-permeable film of the present invention is excellent in the moisture permeability and the water swelling resistance. Accordingly, the moisture-permeable film of the present invention can be preferably used as the moisture-permeable film used in producing moisture-permeable waterproof cloth for clothing, medical, and hygiene; and synthetic leather. The hydrophilic acrylic polymer (B) is preferably a polymer of a hydrophilic acrylic monomer (b1) containing an acrylic monomer (b1-1) having an amide group and an acrylic monomer (b1-2) having an oxyethylene group.

Abstract: A method for producing a coagulated article includes coagulating an aqueous urethane resin composition with a coagulant containing a metal salt and water and being heated to 40° C. or higher. A coagulated article having excellent texture can be obtained without using an organic solvent. Further, an organic solvent is not used for a coagulating bath, and therefore there is no fear of exposure to a harmful volatile substance or diffusion of the substance into the environment, and further the treatment of waste liquid of such a coagulating bath is easy, which contributes to suppression of the cost of production. Therefore, a coagulated article obtained by the method can be advantageously used in producing gloves, a coating material, a simulated leather sheet, and the like.

Abstract: A method for producing a coagulated article includes coagulating an aqueous urethane resin composition with an alcohol solvent having 2 to 6 carbon atoms. A coagulated article having excellent texture and having excellent texture can be obtained. Further, an alcohol solvent with the number of carbon atoms being small is used for a coagulating bath, which means that the burden on the environment is small. Therefore, a coagulated article obtained by the method can be advantageously used in producing gloves, a coating material, a simulated leather sheet, and the like. With respect to the alcohol solvent, from the viewpoint of achieving a further improvement in the texture of the coagulated article due to having high penetrating property into a resin-blended liquid and an isopropyl group having appropriate hydrophobicity, 2-propanol is preferably used.

Abstract: An object of the present invention is to provide a urethane resin composition that has excellent coating workability and storage stability not causing gelation with time and that can form a cured product such as a coating that has excellent heat resistance. The present invention relates to a urethane resin composition includes an alcohol-soluble urethane resin (A) having a hydrolyzable silyl group, inorganic particles (B), and an alcohol (C), in which the inorganic particles (B) have a functional group [Y] that can react with a functional group [X] generated from the hydrolyzable silyl group of the urethane resin (A), a coating material and an adhesive that contain the urethane resin composition, and a formed body obtained by using the urethane resin composition.