Abstract: To provide a coating agent capable of forming a coating layer or film excellent in moisture permeability, flexibility and tensile strength. A coating agent comprising an isocyanate group-containing prepolymer obtainable by reacting a polyol mixture (A) and a polyisocyanate compound (B), wherein the polyol mixture (A) is a mixture of at least two polyoxyalkylene polyols which are different in the number of hydroxy groups or the hydroxy value, and said mixture has an average number of hydroxy groups being from 2.2 to 2.6, a molecular weight per hydroxy group being from 1,500 to 10,000 and an oxyethylene group content being at least 60 mass %.

Abstract: To provide a coating agent capable of forming a coating layer or film excellent in moisture permeability, flexibility and tensile strength. A coating agent comprising an isocyanate group-containing prepolymer obtainable by reacting a polyol mixture (A) and a polyisocyanate compound (B), wherein the polyol mixture (A) is a mixture of at least two polyoxyalkylene polyols which are different in the number of hydroxy groups or the hydroxy value, and said mixture has an average number of hydroxy groups being from 2.2 to 2.6, a molecular weight per hydroxy group being from 1,500 to 10,000 and an oxyethylene group content being at least 60 mass %.

Abstract: The invention relates to a coating agent composition comprising an isocyanate-group-containing prepolymer obtained by reacting a polyol comprising a polyoxyalkylene polyol having 2-4 hydroxyl groups on average, an oxyethylene group content of 85-100% by mass based on all oxyalkylene groups (100% by mass), and an arithmetic-average molecular weight of 800-2,500 with an alicyclic isocyanate and/or an aliphatic isocyanate in the presence of an organic acid bismuth salt catalyst, the isocyanate(s) being used in such an amount as to result in an isocyanate index of 150-300. The invention can provide a coating agent composition which forms a coating film or film having moisture permeability, excellent in mechanical properties and yellowing resistance, having laundering durability and resistance to sweat deterioration, and containing no organotin compounds.

Abstract: It is an object of the present invention to provide an isocyanate group-terminated urethane prepolymer which has a low viscosity at melting and a process for producing the same, and an adhesive which comprises the urethane prepolymer. The invention relates to a process for producing an isocyanate group-terminated urethane prepolymer which comprises reacting polyols with a polyisocyanate compound, wherein the polyols comprise 10 to 50% by mass of a polyester polyol and 90 to 50% by mass of a polycarbonate polyol and wherein a sebacic acid-derived polyester polyol which is a polycondensate of sebacic acid with a diol compound accounts for 50 to 100% by mass of the polyester polyol and wherein the polyisocyanate compound and the polyols are reacted in such amounts that the ratio (by mol) of the isocyanate group/hydroxyl group is 1.2 to 3.2.

Abstract: A hydroxy compound is provided whereby a polyurethane excellent in elongation property can be produced. A hydroxy compound represented by the formula B-Am, wherein A is a univalent group which has a terminal hydroxy group and a carbonate chain composed of an ether unit produced by ring-opening of a monoepoxide and a carbonyloxy unit [—OC(O)—] linked to each other, and B is a m-valent residue produced by removing all hydroxy groups from a polycarbonate having m hydroxy groups at the terminals, provided that —O—R— in the repeating unit [—OC(O)—O—R—] of the polycarbonate is an ether unit other than an ether unit produced by ring-opening of a monoepoxide.

Abstract: Provided are a urethane resin solution to provide a urethane resin having a low tensile elasticity, a low elastic modulus under low temperatures, good elastic recovery, excellent heat resistance and excellent adhesion, a production method of the solution and a production method of the urethane resin. An isocyanate group-terminated prepolymer is synthesized by reacting a polyisocyanate compound with a polyetherester diol having a molecular weight of from 800 to 4,000, which is obtained by a ring-opening polymerization of a mixture of an alkylene oxide and a lactone monomer using a polyoxy tetramethylene diol having a molecular weight of from 500 to 2,500 as an initiator and using a composite metal cyanide complex catalyst if necessary, and the resulting prepolymer is reacted with a chain extender, for example, comprised of a low molecular weight diamine and/or a low molecular weight diol, in an organic solvent.

Abstract: The invention relates to a coating agent composition comprising an isocyanate-group-containing prepolymer obtained by reacting a polyol comprising a polyoxyalkylene polyol having 2-4 hydroxyl groups on average, an oxyethylene group content of 85-100% by mass based on all oxyalkylene groups (100% by mass), and an arithmetic-average molecular weight of 800-2,500 with an alicyclic isocyanate and/or an aliphatic isocyanate in the presence of an organic acid bismuth salt catalyst, the isocyanate(s) being used in such an amount as to result in an isocyanate index of 150-300. The invention can provide a coating agent composition which forms a coating film or film having moisture permeability, excellent in mechanical properties and yellowing resistance, having laundering durability and resistance to sweat deterioration, and containing no organotin compounds.

Abstract: It is an object of the present invention to provide an isocyanate group-terminated urethane prepolymer which has a low viscosity at melting and a process for producing the same, and an adhesive which comprises the urethane prepolymer and has such good workability that the adhesive in a molten state can be easily applied to substrates. The invention relates to a process for producing an isocyanate group-terminated urethane prepolymer which comprises reacting a polyol with a polyisocyanate compound, wherein the polyols comprise 10 to 60% by mass of a polyester polyol and 90 to 40% by mass of a polycarbonate polyol and a sebacic acid-derived polyester polyol which is a polycondensate of sebacic acid with a diol compound accounts for 50 to 100% by mass of the polyester polyol and wherein the polyisocyanate compound and the polyols are reacted in such amounts that the ratio (by mol) of the isocyanate group/hydroxyl group is 1.2 to 3.2.

Abstract: The invention relates to a coating agent composition comprising an isocyanate-group-containing prepolymer obtained by reacting a polyol comprising a polyoxyalkylene polyol having 2-4 hydroxyl groups on average, an oxyethylene group content of 85-100% by mass based on all oxyalkylene groups (100% by mass), and an arithmetic-average molecular weight of 800-2,500 with an alicyclic isocyanate and/or an aliphatic isocyanate in the presence of an organic acid bismuth salt catalyst, the isocyanate(s) being used in such an amount as to result in an isocyanate index of 150-300. The invention can provide a coating agent composition which forms a coating film or film having moisture permeability, excellent in mechanical properties and yellowing resistance, having laundering durability and resistance to sweat deterioration, and containing no organotin compounds.

Abstract: Provided is a method for producing a polyurethane resin solution having a low tensile elasticity and a low elastic modulus and excellent elastic recovery under low temperatures. A method for producing a polyurethane resin solution, which comprises reacting an isocyanate-terminated prepolymer with a chain extender and/or a curing agent in an organic solvent, wherein said prepolymer is obtained by reacting a polyisocyanate compound and a polyether polyol (A) having a number average molecular weight of from 750 to 4,000, which is obtained by addition of an alkylene oxide with a polyoxytetramethylene diol or a polycarbonate diol having a number average molecular weight of from 500 to 2,500 as an initiator, using a composite metal cyanide complex catalyst.

Abstract: Provided are a urethane resin solution to provide a urethane resin having a low tensile elasticity, a low elastic modulus under low temperatures, good elastic recovery, excellent heat resistance and excellent adhesion, a production method of the solution and a production method of the urethane resin. An isocyanate group-terminated prepolymer is synthesized by reacting a polyisocyanate compound with a polyetherester diol having a molecular weight of from 800 to 4,000, which is obtained by a ring-opening polymerization of a mixture of an alkylene oxide and a lactone monomer using a polyoxy tetramethylene diol having a molecular weight of from 500 to 2,500 as an initiator and using a composite metal cyanide complex catalyst if necessary, and the resulting prepolymer is reacted with a chain extender, for example, comprised of a low molecular weight diamine and/or a low molecular weight diol, in an organic solvent.