Abstract: A task to be achieved by the present invention is to provide a urethane water dispersion which is unlikely to soak the substrate well, and which has excellent peel strength and excellent prompt releasability. The present invention provides a urethane resin water dispersion containing a urethane resin (A), water (B), and a crosslinking agent (C), wherein the urethane resin (A) has a viscosity at 50° C. in the range of from 15,000 to 34,000 mPa·s, a viscosity at 100° C. in the range of from 1,000 to 10,000 mPa·s, and a viscosity at 150° C. in the range of from 100 to 1,300 mPa·s. Further, the present invention provides a synthetic leather having a bonding layer formed from the urethane resin water dispersion. Further, the present invention provides a method for producing the synthetic leather.

Abstract: A task to be achieved by the invention is to provide a foamed sheet having excellent retention of foam, hand feeling, and peel strength. The present invention provides a foamed sheet which is formed from a water dispersion of a urethane resin (X), wherein the water dispersion has a urethane resin (X) content of 50 to 80% by mass, and the water dispersion contains no organic solvent. Further, the present invention provides a synthetic leather having at least a substrate (i) and a polyurethane layer (ii), wherein the polyurethane layer (ii) is formed from the above-mentioned foamed sheet. The foamed sheet preferably has a density of 200 to 1,000 kg/m3.

Abstract: The present invention provides a urethane resin composition including a urethane resin (A) having a nonionic group, water (B), and a powder (C), wherein the urethane resin (A) has a flow start temperature of 100° C. or above, the mass ratio [(A)/(B)] of the urethane resin (A) to the water (B) is in the range of 50/50 to 80/20, and the bulk density of the powder (C) is 400 g/L or less. The present invention also provides a synthetic leather including at least a base fabric (i), an adhesive layer (ii), and a skin layer (iii), wherein the adhesive layer (ii) is formed from the urethane resin composition. The urethane resin composition can form a film with excellent peel strength and texture.

Abstract: The present invention provides a resin composition containing a urethane resin (A), an acrylic resin (B), and water (C), in which the acrylic resin (B) is a polymer of a polymerizable compound containing a (meth)acrylic compound (b-1) having a hydroxy group and has a glass transition temperature of 40° C. or higher. The present invention also provides a synthetic leather having at least a base (i), an adhesive layer (ii), and a skin layer (iii), in which the skin layer (iii) is formed from the resin composition. The polymerizable compound as the raw material of the acrylic resin (B) preferably contains, in addition to (b-1), a polymerizable compound (b-2) in which a hydrogen bond term (?H) in Hansen solubility parameters is 2.2 MPa0.5 or more.

Abstract: A task to be achieved by the invention is to provide a fiber substrate having excellent filling state of a urethane resin and excellent hand feeling. The present invention provides a fiber substrate filled with a urethane resin (X), which is formed from a water dispersion of the urethane resin (X), wherein the water dispersion has a urethane resin (X) content of 50 to 80% by mass, and the water dispersion contains no organic solvent. Further, the present invention provides an artificial leather having the above-mentioned fiber substrate. It is preferred that the urethane resin (X) uses a chain extender (a1) as a raw material. Further, the chain extender (a1) which has an amino group is preferably used.

Abstract: A task to be achieved by the invention is to provide a foamed sheet having excellent retention of foam, hand feeling, and peel strength. The present invention provides a foamed sheet which is formed from a water dispersion of a urethane resin (X), wherein the water dispersion has a urethane resin (X) content of 50 to 80% by mass, and the water dispersion contains no organic solvent. Further, the present invention provides a synthetic leather having at least a substrate (i) and a polyurethane layer (ii), wherein the polyurethane layer (ii) is formed from the above-mentioned foamed sheet. The foamed sheet preferably has a density of 200 to 1,000 kg/m3.

Abstract: A task to be achieved by the present invention is to provide a urethane water dispersion which is unlikely to soak the substrate well, and which has excellent peel strength and excellent prompt releasability. The present invention provides a urethane resin water dispersion containing a urethane resin (A), water (B), and a crosslinking agent (C), wherein the urethane resin (A) has a viscosity at 50° C. in the range of from 15,000 to 34,000 Pa·s, a viscosity at 100° C. in the range of from 1,000 to 10,000 Pa·s, and a viscosity at 150° C. in the range of from 100 to 1,300 Pa·s. Further, the present invention provides a synthetic leather having a bonding layer formed from the urethane resin water dispersion. Further, the present invention provides a method for producing the synthetic leather.

Abstract: The present invention provides a synthetic leather including at least a base (i), an adhesive layer (ii), and a skin layer (iii). The adhesive layer (ii) and the skin layer (iii) are both formed of a urethane resin composition including a urethane resin and water, the urethane resin being produced using an aromatic polyisocyanate as a raw material. The urethane resin composition forming the adhesive layer (ii) preferably includes a urethane resin (A) and water (B), the urethane resin (A) being produced using an aromatic polyisocyanate (a1) as a raw material. The aromatic polyisocyanate (a1) preferably includes toluene diisocyanate. It is preferable that the urethane resin (A) include an anionic group and the concentration of the anionic group in the urethane resin (A) be 0.35 mmol/g or less.

Abstract: The present invention provides a one-component aqueous resin composition including: an aqueous urethane resin (A), an aqueous urethane resin (A) that has a flow starting temperature of 50° C. to 155° C. and an acid value of 15 mgKOH/g or lower; and an aqueous medium (B). In addition, the present invention provides a fiber laminate including: a layer (iii) that is made from the one-component aqueous resin composition; and a fiber base (iv). The aqueous urethane resin (A) is preferably a specific anionic urethane resin (A-A-1) or an anionic urethane resin (A-A-2). The one-component aqueous resin composition of the present invention exhibits excellent adhesiveness and resistance to moist heat without the aid of a crosslinking agent.

Abstract: The present invention provides a synthetic leather including at least a base (i), an adhesive layer (ii), and a skin layer (iii). The adhesive layer (ii) and the skin layer (iii) are both formed of a urethane resin composition including a urethane resin and water, the urethane resin being produced using an aromatic polyisocyanate as a raw material. The urethane resin composition forming the adhesive layer (ii) preferably includes a urethane resin (A) and water (B), the urethane resin (A) being produced using an aromatic polyisocyanate (a1) as a raw material. The aromatic polyisocyanate (a1) preferably includes toluene diisocyanate. It is preferable that the urethane resin (A) include an anionic group and the concentration of the anionic group in the urethane resin (A) be 0.35 mmol/g or less.

Abstract: The present invention provides a foamed urethane sheet which is formed from an aqueous urethane resin composition containing a urethane resin (A), an aqueous medium (B), and a surfactant (C) having 10 or more carbon atoms, and has a density of 200 to 1,000 kg/m3. Further, the present invention provides a synthetic leather having at least a substrate (i) and a polyurethane layer (ii), wherein the polyurethane layer (ii) is formed from the foamed urethane sheet according to any one of claims 1 to 4. The polyurethane layer (ii) may be embossed. The surfactant (C) is preferably a stearic acid salt, and the urethane resin (A) which has an anionic group, and has a flow starting temperature of 80° C. or higher is preferably used.

Abstract: The present invention provides a resin composition containing a urethane resin (A), an acrylic resin (B), and water (C), in which the acrylic resin (B) is a polymer of a polymerizable compound containing a (meth)acrylic compound (b-1) having a hydroxy group and has a glass transition temperature of 40° C. or higher. The present invention also provides a synthetic leather having at least a base (i), an adhesive layer (ii), and a skin layer (iii), in which the skin layer (iii) is formed from the resin composition. The polymerizable compound as the raw material of the acrylic resin (B) preferably contains, in addition to (b-1), a polymerizable compound (b-2) in which a hydrogen bond term (?H) in Hansen solubility parameters is 2.2 MPa0.5 or more.

Abstract: The present invention provides an adhesive characterized by containing an anionic urethane resin (A) having a flow-starting temperature of 100° C. or lower, a neutralizing agent (B), a carbodiimide crosslinking agent (C), and an aqueous medium (D). The present invention also provides a synthetic leather characterized by including at least a substrate (i), an adhesive layer (ii) formed of the adhesive, and a surface layer (iii). The carbodiimide crosslinking agent (C) is preferably produced from a starting material containing one or more polyisocyanates selected from the group consisting of 1,3-bis(1-methyl-1-isocyanatoethyl)benzene, 1,4-bis(1-methyl-1-isocyanatoethyl)benzene, and dicyclohexylmethane diisocyanate.

Abstract: The present invention provides a glove including a coagulated film of an aqueous polyurethane composition containing anionic polyurethane (A), which has an oxyalkylene group content within a range of 4 to 12 mol/kg and a urea bond content of 0.2 mol/kg or less, and an aqueous medium (B). The anionic polyurethane (A) is preferably the reaction product of polyoxytetramethylene glycol, a glycol having a carboxyl group, ethylene glycol, and diphenylmethane diisocyanate or the reaction product of polyoxytetramethylene glycol, a glycol having a carboxyl group, butanediol, and diphenylmethane diisocyanate. The average particle diameter of the anionic polyurethane (A) is preferably within a range of 0.01 to 1 ?m.

Abstract: The present invention provides a one-component aqueous resin composition including: an aqueous urethane resin (A), an aqueous urethane resin (A) that has a flow starting temperature of 50° C. to 155° C. and an acid value of 15 mgKOH/g or lower; and an aqueous medium (B). In addition, the present invention provides a fiber laminate including: a layer (iii) that is made from the one-component aqueous resin composition; and a fiber base (iv). The aqueous urethane resin (A) is preferably a specific anionic urethane resin (A-A-1) or an anionic urethane resin (A-A-2). The one-component aqueous resin composition of the present invention exhibits excellent adhesiveness and resistance to moist heat without the aid of a crosslinking agent.

Abstract: A problem to be solved by the invention is to provide a method for producing leather-like sheets with excellent chemical resistance and discoloration resistance utilizing an aqueous urethane resin composition. The invention provides a method for producing a leather-like sheet in the form of a laminate including a film, the method including forming the film by applying an aqueous urethane resin composition onto a substrate and drying the composition, the aqueous urethane resin composition including a urethane resin, a nonionic emulsifier and an aqueous medium, the urethane resin being one obtained by reacting a polyol including a carboxyl group-containing polyol, an aromatic polyisocyanate and a chain extender, the urethane resin having a urea bond content of not more than 0.3 mol/kg. The film is preferably used as a skin layer and/or a topcoat layer of the leather-like sheet.

Abstract: Provided is an aqueous urethane resin composition with which a fiber base can be impregnated, which is capable of thermal coagulation, which does not detach from the fiber base due to water or heat in the step of coloring the impregnated base, and which is capable of forming a coating film having resistance to discoloration which may occur with time and an excellent feeling, that is, flexibility and resilience. The aqueous urethane resin composition includes a urethane resin a nonionic emulsifier, and an aqueous medium, the urethane resin being produced by reacting a polyol including a polyol including a carboxyl group with an aromatic polyisocyanate and a chain extender, the content of urea linkage in the urethane resin being 0.3 mol/kg or less. Also provided is a leather-like sheet produced by impregnating a fiber base with the aqueous urethane resin composition and subsequently performing thermal coagulation of the urethane resin composition.

Abstract: The present invention provides a glove including a coagulated film of an aqueous polyurethane composition containing anionic polyurethane (A), which has an oxyalkylene group content within a range of 4 to 12 mol/kg and a urea bond content of 0.2 mol/kg or less, and an aqueous medium (B). The anionic polyurethane (A) is preferably the reaction product of polyoxytetramethylene glycol, a glycol having a carboxyl group, ethylene glycol, and diphenylmethane diisocyanate or the reaction product of polyoxytetramethylene glycol, a glycol having a carboxyl group, butanediol, and diphenylmethane diisocyanate. The average particle diameter of the anionic polyurethane (A) is preferably within a range of 0.01 to 1 ?m.

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.