Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
  • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
  • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/08—Processes
  • C08G18/0838—Manufacture of polymers in the presence of non-reactive compounds
  • C08G18/0842—Manufacture of polymers in the presence of non-reactive compounds in the presence of liquid diluents
  • C08G18/0861—Manufacture of polymers in the presence of non-reactive compounds in the presence of liquid diluents in the presence of a dispersing phase for the polymers or a phase dispersed in the polymers
  • C08G18/0866—Manufacture of polymers in the presence of non-reactive compounds in the presence of liquid diluents in the presence of a dispersing phase for the polymers or a phase dispersed in the polymers the dispersing or dispersed phase being an aqueous medium
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  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/08—Processes
  • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
  • C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/08—Processes
  • C08G18/16—Catalysts
  • C08G18/22—Catalysts containing metal compounds
  • C08G18/24—Catalysts containing metal compounds of tin
  • C08G18/244—Catalysts containing metal compounds of tin tin salts of carboxylic acids
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
  • C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
• • C—CHEMISTRY; METALLURGY
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
  • C08G18/44—Polycarbonates
• • C—CHEMISTRY; METALLURGY
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/48—Polyethers
• • C—CHEMISTRY; METALLURGY
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/48—Polyethers
  • C08G18/4804—Two or more polyethers of different physical or chemical nature
  • C08G18/4808—Mixtures of two or more polyetherdiols
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/48—Polyethers
  • C08G18/4833—Polyethers containing oxyethylene units
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/48—Polyethers
  • C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
  • C08G18/72—Polyisocyanates or polyisothiocyanates
  • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
  • C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
  • C08G18/758—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing two or more cycloaliphatic rings
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/34—Silicon-containing compounds
  • C08K3/36—Silica
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
  • C08L1/02—Cellulose; Modified cellulose
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
  • C08L75/04—Polyurethanes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
  • C08L83/04—Polysiloxanes
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
  • C09J175/04—Polyurethanes
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
  • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
  • D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
  • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
  • D06N3/0065—Organic pigments, e.g. dyes, brighteners
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
  • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
  • D06N3/0095—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by inversion technique; by transfer processes
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
  • D06N3/02—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with cellulose derivatives
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
  • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
  • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
  • D06N3/146—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes characterised by the macromolecular diols used
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
  • D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
  • D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
  • D06N3/183—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials the layers are one next to the other
• • D—TEXTILES; PAPER
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  • D06N2205/00—Condition, form or state of the materials
  • D06N2205/20—Cured materials, e.g. vulcanised, cross-linked
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  • D06N2211/00—Specially adapted uses
  • D06N2211/12—Decorative or sun protection articles
  • D06N2211/28—Artificial leather

Definitions

• the present invention relates to a urethane resin composition, synthetic leather, and a method for producing synthetic leather.
• solvent-based urethane resin compositions are mainly used for various applications such as artificial leathers, synthetic leathers, coating agents, glove coatings, glove films, and adhesives.
• Dimethylformamide (DMF) is mainly used for this solvent-based urethane resin.
• DMF Dimethylformamide
• PUD water-based urethane
• urethane resin in which urethane resin is dispersed in water
• aging is not required, but it is difficult to control the amount of adhesive permeation, and the texture and peel strength are issues, making practical use difficult.
• two-liquid adhesives that combine a PUD base agent and an isocyanate cross-linking agent have a short usable time (pot life), making it difficult to process them stably.
• the two-liquid type adhesive that combines the PUD base agent and the oxazoline cross-linking agent has a long pot life, the strength of the cross-linked film is weak and the peel strength of the processed product is low, making practical use difficult.
• the two-liquid type adhesive which is a combination of a PUD base agent and a carbodiimide cross-linking agent, has a long pot life and a strong cross-linked film.
• the problem to be solved by the present invention is to provide a water-containing urethane resin composition that provides excellent peel strength and texture.
• the present invention is a urethane resin composition containing a urethane resin (A) having a nonionic group, water (B), and powder (C), wherein the urethane resin (A) has a flow initiation temperature of 100 ° C. or more, the mass ratio [(A)/(B)] of the urethane resin (A) and water (B) is in the range of 50/50 to 80/20, and the volume of the powder (C) A urethane resin composition characterized by having a density of 400 g/L or less is provided.
• the present invention also provides a synthetic leather having 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.
• Synthetic leather characterized by being made of synthetic leather.
• the present invention also provides a method for producing synthetic leather, characterized by applying the urethane resin composition and adhering another layer before the composition is completely cured.
• the urethane resin composition of the present invention contains water and is environmentally friendly. Moreover, the urethane resin composition is excellent in peel strength and texture. Furthermore, the urethane resin composition does not require a cross-linking agent, has a long pot life, and is excellent in quick release properties.
• the urethane resin composition of the present invention can be suitably used in the production of synthetic leather, and in particular can be suitably used as an adhesive layer for synthetic leather.
• the urethane resin composition of the present invention contains a specific urethane resin (A), water (B), and specific powder (C).
• the urethane resin (A) has a flow start temperature of 100°C or higher.
• the urethane resin (A) prevents the urethane resin from thermally melting during drying, suppresses permeation into the base fabric, etc., and provides excellent peel strength and a soft texture.
• the flow initiation temperature of the urethane resin (A) is preferably 100 to 220° C., more preferably 120 to 200° C., in order to further enhance the effect.
• Methods for adjusting the flow initiation temperature to a high value include, for example, using a polycarbonate polyol or a polyether polyol as the polyol (a2), increasing the amount of the chain extender (a1), and using the polyisocyanate (a3) as
• the use of highly crystalline polyisocyanates such as 4,4′-diphenylmethane diisocyanate and dicyclohexylmethane diisocyanate.
• a method for adjusting the flow initiation temperature low for example, using a polyester polyol as the polyol (a2), reducing the amount of the chain extender (a1), and toluene diisocyanate as the polyisocyanate (a3) and polyisocyanate with low crystallinity such as isophorone diisocyanate. Therefore, by appropriately selecting these methods, the flow initiation temperature of the urethane resin (A) can be adjusted.
• the method for measuring the flow initiation temperature of the urethane resin (A) will be described later in Examples.
• the urethane resin (A) has a nonionic group and is dispersible in water.
• the urethane resin (A) has a nonionic group, when the urethane resin composition of the present invention is used as an adhesive, it is easy to increase the viscosity of the adhesive, and the tendency to reduce the viscosity during drying is reduced. . It is possible to suppress the penetration of the adhesive into the base fabric or the like during drying, and it is possible to obtain excellent peel strength and soft texture.
• Examples of methods for obtaining the urethane resin having the nonionic group include a method using a compound having an oxyethylene structure as a raw material.
• Examples of the compound having an oxyethylene structure include polyether polyols having an oxyethylene structure such as polyethylene glycol, polyoxyethylene polyoxypropylene glycol, polyoxyethylene polyoxytetramethylene glycol, and polyethylene glycol dimethyl ether. . These compounds may be used alone or in combination of two or more. Among these, it is preferable to use polyethylene glycol and/or polyethylene glycol dimethyl ether because the hydrophilicity can be controlled more easily.
• the number average molecular weight of the compound having an oxyethylene structure is preferably in the range of 200 to 10,000, from the viewpoint of obtaining even better emulsifiability and water dispersion stability. A range of 300 to 2,000 is more preferred, and a range of 300 to 1,000 is particularly preferred. In addition, the number average molecular weight of the compound having the oxyethylene structure indicates a value measured by a gel permeation column chromatography (GPC) method.
• GPC gel permeation column chromatography
• urethane resin (A) specifically, for example, a reaction product of a chain extender (a1), a polyol (a2), a polyisocyanate (a3), and a compound having the oxyethylene structure can be used. can.
• chain extender (a1) those having a molecular weight of less than 500 (preferably in the range of 50 to 450) can be used. Specifically, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol and dipropylene can be used.
• Glycol 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, hexamethylene glycol, sucrose, methylene glycol, glycerin, sorbitol, bisphenol A, 4,4'-dihydroxydiphenyl, 4,4 '-dihydroxydiphenyl ether, chain extender having a hydroxyl group such as trimethylolpropane; Cyclohexanediamine, 1,3-cyclohexanediamine, 1,4-cyclohexanediamine, 4,4'-dicyclohexylmethanediamine, 3,3'-dimethyl-4,4'-dicyclohexylmethanediamine, 1,4-cyclohexanediamine, hydrazine A chain extender having an amino group such as can be used. These chain extenders may be used alone or in combination of two or more.
• the molecular weight of the chain extender (a1) indicates a value calculated from the
• chain extender (a1) the chain can be easily extended even at a relatively low temperature of 30 ° C. or less, and the energy consumption during the reaction can be suppressed.
• a chain extender having an amino group (hereinafter referred to as abbreviated as "amine-based chain extender”) is preferable, and it is more preferable to use an amine-based chain extender having a molecular weight in the range of 30 to 250.
• the molecular weight indicates the average value, and the average value may be included in the preferred molecular weight range.
• the proportion of the chain extender (a1) used even better mechanical strength, film-forming properties, texture, peel strength, immediate peelability, emulsifiability, low-temperature flexibility, and water dispersion stability can be obtained. 0.1 to 30% by mass, more preferably 0.5 to 10% by mass, of the total mass of the raw materials constituting the urethane resin (A), because the urethane resin (A) can be more easily differentiated into a high solid content. % is particularly preferred.
• polyether polyol for example, polyether polyol, polyester polyol, polyacrylic polyol, polycarbonate polyol, polybutadiene polyol, etc.
• polyacrylic polyol for example, polycarbonate polyol, polybutadiene polyol, etc.
• polycarbonate polyol for example, polycarbonate polyol, polybutadiene polyol, etc.
• polybutadiene polyol polystylene glycol
• these polyols may be used alone or in combination of two or more.
• polyol (a2) those other than the said compound which has the said oxyethylene structure which provides the said nonionic group are used.
• the number average molecular weight of the polyol (a2) is preferably in the range of 500 to 100,000, more preferably in the range of 800 to 10,000, from the viewpoint of the mechanical strength of the resulting film.
• the number average molecular weight of the polyol (a2) is the value measured by gel permeation column chromatography (GPC).
• the proportion of the polyol (a2) used is more preferably in the range of 40 to 90% by mass in the total mass of the raw materials constituting the urethane resin (A) from the viewpoint of obtaining even better mechanical strength, and 50 to 90% by mass. A range of 80% by weight is particularly preferred.
• polyisocyanate (a3) examples include aromatic polyisocyanates such as phenylene diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, naphthalene diisocyanate, polymethylene polyphenyl polyisocyanate, and carbodiimidized diphenylmethane polyisocyanate; hexamethylene diisocyanate, Aliphatic polyisocyanates such as lysine diisocyanate, cyclohexane diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, xylylene diisocyanate, tetramethylxylylene diisocyanate, dimer acid diisocyanate, norbornene diisocyanate, or alicyclic polyisocyanates can be used. These polyisocyanates may be used alone or in combination of two or
• the use ratio of the polyisocyanate (a3) is more preferably in the range of 5 to 40% by mass based on the total mass of the raw materials constituting the urethane resin (A) from the viewpoint of obtaining even better mechanical strength.
• a range of up to 35% by weight is particularly preferred.
• the proportion of the compound having an oxyethylene structure is selected from the viewpoint of obtaining even better emulsifiability, water dispersion stability, texture, immediate peelability, low-temperature flexibility, and film-forming properties, so that the urethane resin (A ) is preferably 5% by mass or less, more preferably 3% by mass or less, and still more preferably in the range of 0.25 to 3% by mass.
• the average particle size of the urethane resin (A) is preferably in the range of 0.01 to 1 ⁇ m, and 0.05, from the viewpoint of obtaining even better texture, low-temperature flexibility, and film-forming properties. A range of ⁇ 0.9 ⁇ m is more preferred. A method for measuring the average particle size of the urethane resin (A) will be described later in Examples.
• the mass ratio [(A)/(B)] of the urethane resin (A) and water (B) must be in the range of 50/50 to 80/20. be. Within this range, the viscosity of the adhesive liquid increases during drying before the viscosity of the adhesive liquid decreases due to the temperature rise during drying. Therefore, penetration of the adhesive into the base fabric or the like can be suppressed, and excellent peel strength and texture can be obtained.
• the mass ratio is more preferably 50/50 to 70/30.
• water (B) ion-exchanged water, distilled water, or the like can be used. These waters may be used alone or in combination of two or more.
• the polyol (a2), the polyisocyanate (a3), and the compound having an oxyethylene structure are reacted in the absence of a solvent to obtain a compound having an isocyanate group.
• a urethane prepolymer (i) is obtained (hereinafter abbreviated as the “prepolymer step”), then the urethane prepolymer (i) is dispersed in the water (hereinafter abbreviated as the “emulsification step”), and then , a step of reacting the chain extender (a1) to obtain a urethane resin (A) (hereinafter abbreviated as a “chain extend step”).
• the prepolymer step is preferably carried out without a solvent.
• the prepolymer process was generally carried out in an organic solvent such as methyl ethyl ketone or acetone. It took several production days on site. In addition, it is difficult to completely distill off the organic solvent in the solvent removal step, and there are many cases in which a small amount of the organic solvent remains, making it difficult to completely respond to environmental concerns.
• the prepolymer in the absence of solvent, it is possible to obtain a urethane resin that is completely free of organic solvents and to save labor in the production process.
• the prepolymer step includes a reaction vessel equipped with stirring blades; kneader, container kneader, taper roll, single screw extruder, twin screw extruder, triple screw extruder, universal mixer, plastomill, bodder type kneader, etc. Kneader; Rotary dispersion mixer such as TK Homomixer, Filmix, Ebara Milder, Clearmix, Ultra Turrax, Cavitron, Biomixer; Ultrasonic dispersion device; This can be done by using a device that can mix by its own flow, or the like.
• the molar ratio [isocyanate Group / (hydroxyl group and amino group)], from the point that even better low-temperature flexibility, crack resistance, film-forming properties, texture, peel strength, peel strength, and mechanical strength can be obtained, 1.1 It is preferably in the range of ⁇ 3, more preferably in the range of 1.2 to 2.
• reaction in the prepolymer step is carried out at 50 to 120°C for 1 to 10 hours.
• the emulsification step includes, for example, a reactor equipped with stirring blades; Kneaders such as; Homomixer, Static Mixer, Filmix, Ebara Milder, Clearmix, Ultra Turrax, Cavitron, Biomixer, and other rotary dispersion mixers; Ultrasonic dispersion equipment; Instead, it can be performed by using a device or the like that can mix by the flow of the fluid itself.
• Kneaders such as; Homomixer, Static Mixer, Filmix, Ebara Milder, Clearmix, Ultra Turrax, Cavitron, Biomixer, and other rotary dispersion mixers; Ultrasonic dispersion equipment; Instead, it can be performed by using a device or the like that can mix by the flow of the fluid itself.
• the emulsification step is preferably performed at a temperature at which water does not evaporate, for example, a range of 10 to 90° C.
• the emulsification step can be performed using the same equipment as the prepolymer step. .
• the isocyanate group of the urethane prepolymer (i) reacts with the chain elongation agent (a1) to increase the molecular weight of the urethane prepolymer (i) to obtain the urethane resin (A). It is a process.
• the temperature for the chain elongation step is preferably 50° C. or lower from the viewpoint of productivity.
• the molar ratio of the isocyanate group of the urethane prepolymer (i) to the sum of the hydroxyl groups and amino groups of the chain extender (a1) [(hydroxyl group and amino group)/isocyanate group] is in the range of 0.8 to 1.1 in terms of obtaining even better low-temperature flexibility, crack resistance, film-forming properties, peel strength, immediate peelability, texture, and mechanical strength. is preferred, and a range of 0.9 to 1 is more preferred.
• the chain elongation step can be performed using the same equipment as the prepolymer step.
• the powder (C) must have a bulk density of 400 g/L or less.
• the bulk density of the powder (C) is preferably from 5 to 400 g/L, more preferably from 10 to 360 g/L, in order to further enhance the above effect.
• the bulk density of the powder (C) indicates a value obtained by accurately weighing and measuring the weight of a container having a known volume and weight filled with the powder.
• silica powder for example, silica powder, silicone powder, cellulose powder, urethane resin powder, acrylic resin powder, aluminosilica powder, hectorite powder, bentonite powder and the like can be used.
• silica powder silicone powder, cellulose powder, urethane resin powder, acrylic resin powder, aluminosilica powder, hectorite powder, bentonite powder and the like
• one or more selected from the group consisting of silica powder, silicone powder, and cellulose powder is preferable because the above effects can be further enhanced.
• the amount of the powder (C) used is preferably 0.1 to 15 parts by mass with respect to 100 parts by mass of the urethane resin (A) from the viewpoint that the above effect can be further enhanced, and 0.1 ⁇ 10 parts by mass is more preferred.
• the urethane resin composition of the present invention contains the urethane resin (A), water (B), and powder (C) as essential components, but may contain other additives as necessary. .
• additives examples include surfactants, emulsifiers, neutralizers, thickeners, urethanization catalysts, fillers, pigments, dyes, flame retardants, leveling agents, antiblocking agents, and the like. . These additives may be used alone or in combination of two or more.
• organic solvent when producing the urethane resin (A), it is preferable that substantially no organic solvent is contained, but an organic solvent may be added as an additive.
• the urethane resin composition of the present invention contains water and is environmentally friendly. Moreover, the urethane resin composition is excellent in peel strength and texture. Furthermore, the urethane resin composition does not require a cross-linking agent, has a long pot life, and is excellent in quick release properties. Therefore, the urethane resin composition of the present invention can be suitably used in the production of synthetic leather, and in particular can be suitably used as an adhesive layer for synthetic leather.
• the synthetic leather has at least a base fabric (i), an adhesive layer (ii), and a skin layer (iii), and specific examples thereof include the following configurations.
• Base fabric (i), adhesive layer (ii), skin layer (iii) (2) Base fabric (i), adhesive layer (ii), intermediate layer, skin layer (iii) (3) Base fabric (i), wet porous layer, adhesive layer (ii), skin layer (iii) (4) Base fabric (i), wet porous layer, adhesive layer (ii), intermediate layer, skin layer (iii)
• Examples of the base fabric (i) include polyester fiber, polyethylene fiber, nylon fiber, acrylic fiber, polyurethane fiber, acetate fiber, rayon fiber, polylactic acid fiber, cotton, hemp, silk, wool, glass fiber, carbon fiber, Nonwoven fabrics, woven fabrics, knitted fabrics, and the like made from these blended fibers can be used.
• wet porous layer one formed by a known wet film-forming method using a solvent-based urethane resin composition can be used.
• Materials for forming the intermediate layer and the skin layer (iii) include, for example, known water-based urethane resins, solvent-based urethane resins, solvent-free urethane resins, water-based acrylic resins, silicone resins, polypropylene resins, polyester resins, and the like. can be used. These resins may be used alone or in combination of two or more.
• the thickness of the adhesive layer (ii) is, for example, in the range of 30 to 60 ⁇ m.
• the flow initiation temperature of the adhesive layer (ii), that is, the flow initiation temperature of the cured product of the urethane resin composition of the present invention is preferably 155° C. or higher from the viewpoint of obtaining even better heat resistance. , 160 to 220° C. is more preferred.
• the method for measuring the flow start temperature of the cured product of the urethane resin composition will be described later in Examples.
• a resin for forming a skin layer is applied on a release-treated base material, dried and processed to obtain a skin layer (iii), and then the skin
• a method of coating the urethane resin composition of the present invention on the layer (iii) and bonding it to the base fabric (i) before the urethane resin composition is completely cured can be mentioned. These methods are called wet lamination methods or semi-wet lamination methods. By using such a method, even better peel strength can be obtained.
• Examples of methods for applying the urethane resin include methods using an applicator, roll coater, spray coater, T-die coater, knife coater, comma coater, and the like.
• the synthetic leather After manufacturing the synthetic leather, it may be aged, for example, at 30 to 100°C for 1 to 10 days, if necessary.
• Example 1 In the presence of 0.1 parts by mass of stannous octoate, 1,000 parts by mass of polyether polyol (“PTMG2000” manufactured by Mitsubishi Chemical Corporation, number average molecular weight: 2,000, hereinafter abbreviated as “PTMG”). , polyethylene glycol (manufactured by NOF Corporation "PEG600", number average molecular weight; 600, hereinafter abbreviated as “PEG”) 38 parts by mass, and dicyclohexylmethane diisocyanate (hereinafter abbreviated as "HMDI”) 262 parts by mass were reacted at 100° C. until the NCO% reached 2.8% by mass to obtain urethane prepolymer A1.
• PTMG2000 polyether polyol
• PEG600 number average molecular weight
• PEG dicyclohexylmethane diisocyanate
• urethane prepolymer A1 heated to 70° C.
• 200 parts by mass of a 20% by mass aqueous solution of sodium dodecylbenzenesulfonate (“Neogen S-20F” manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) and 650 parts of water are added. Parts by mass were mixed to obtain an emulsion.
• a water-diluted solution of piperazine (hereinafter abbreviated as "PP") having an amino group content equivalent to 95% of the NCO groups is added to extend the chain, and finally the non-volatile content of the urethane resin is A urethane resin water dispersion containing 50% by mass was obtained.
• PP piperazine
• Example 2 In Example 1, the type of PTMG was changed to polycarbonate polyol ("ETERNACOLL UH-100" manufactured by Ube Industries, number average molecular weight: 1,000), and the mass ratio of urethane resin and water was 60/40.
• a urethane resin composition (2) was obtained in the same manner as in Example 1, except for changing as follows.
• Example 3 A urethane resin composition (3 ).
• Example 4 In Example 1, the type of OK-412 was changed to cellulose powder (“KC-Floc W-200Y” manufactured by Nippon Paper Chemicals Co., Ltd., bulk density: 350 g / L, hereinafter abbreviated as “W-200Y”). obtained a urethane resin composition (4) in the same manner as in Example 1.
• Example 1 the type of OK-412 was changed to silicone resin powder (“KMP-590” manufactured by Shin-Etsu Chemical Co., Ltd., bulk density: 580 g / L, hereinafter abbreviated as “KMP-590”).
• KMP-590 silicone resin powder manufactured by Shin-Etsu Chemical Co., Ltd., bulk density: 580 g / L, hereinafter abbreviated as “KMP-590”.
• R1 urethane resin composition
• Example 2 In Example 1, except that the type of OK-412 was changed to urethane resin powder (“Art Pearl JMB-800” manufactured by Negami Kogyo Co., Ltd., bulk density: 413 g / L, hereinafter abbreviated as “JMB-800”). Aqueous resin composition (R2) containing urethane resin aqueous dispersion (1) was obtained in the same manner as in Example 1.
• aqueous urethane resin dispersion having a nonvolatile content of 50% by mass.
• the flow initiation temperature of the urethane resin was 180°C. 100 parts by mass of this urethane resin aqueous dispersion, 5 parts by mass of OK-412, and 0.1 part by mass of an antifoaming agent (manufactured by Evonik "TEGO FOAMEX800") are placed in a container and mixed with a mechanical mixer at 2,000 rpm for 2 minutes. The mixture was stirred and then defoamed with a vacuum defoamer to obtain a urethane resin composition (R4).
• an antifoaming agent manufactured by Evonik "TEGO FOAMEX800
• a urethane resin composition (R6) was obtained in the same manner as in Example 1, except that water was added to adjust the mass ratio of the urethane resin to water to 40/60.
• the number average molecular weights of polyols and the like used in Examples and Comparative Examples are values obtained by measuring under the following conditions by gel permeation column chromatography (GPC).
• Measuring device High-speed GPC device ("HLC-8220GPC” manufactured by Tosoh Corporation) Column: The following columns manufactured by Tosoh Corporation were connected in series and used. "TSKgel G5000" (7.8mm I.D. x 30cm) x 1 "TSKgel G4000” (7.8mm I.D. x 30cm) x 1 "TSKgel G3000” (7.8mm I.D. x 30cm) x 1 Book “TSKgel G2000" (7.8 mm I.D.
• Ether-based PUD “Hydran WLS-120AR” (manufactured by DIC Corporation) 100 g, thickener "Borch Gel ALA” (manufactured by Borchers) 2.0 g, leveling agent "TEGO Flow 425" (manufactured by Evonik), antifoaming agent " TEGO Twin4000” (manufactured by Evonik) and black pigment "DILAC HS-9550" (manufactured by DIC Corporation) are stirred in a mechanical mixer at 2000 rpm for 2 minutes, and then defoamed using a vacuum deaerator to form the skin layer. created a liquid.
• the urethane resin composition layer (adhesive layer) and laminated with a laminator under the conditions of a temperature of 25° C., a pressure of 5 MPa, and a feed rate of 0.5 m/min. Furthermore, the adhesive layer was dried with a hot air dryer (drying conditions: 120°C for 2 minutes), and immediately after that, it was peeled off from the release paper to obtain a processed synthetic leather.
• a 2.5 cm wide hot-melt tape (“BW-2” manufactured by Sun Kasei Co., Ltd.) was placed on the surface of the skin layer film of the synthetic leather and heat-pressed at 150° C. for 30 seconds to adhere the hot-melt tape. Samples were cut along the width of the hot melt tape. Part of this sample was peeled off, the substrate and the hot-melt tape were sandwiched with a chuck, and a Shimadzu Autograph "AG-1" (manufactured by Shimadzu Corporation) was used to perform the test at a full scale of 5 kg and a head speed of 20 mm/min. The peel strength was measured under the conditions. The average value of the obtained data was calculated and converted into a width of 1 cm.
• BW-2 manufactured by Sun Kasei Co., Ltd.
• Examples 1 to 4 which are the urethane resin compositions of the present invention, are excellent in peel strength and texture.
• Comparative Examples 1 and 2 are embodiments in which powder (C) having a bulk density outside the range defined by the present invention was used, but the peel strength and texture were poor.
• Comparative Example 3 is an embodiment in which the powder (C) is not used, but the peel strength and texture are poor.
• Comparative Example 4 is an embodiment using a urethane resin having an anionic group instead of the urethane resin (A), but the peel strength and texture were poor.
• Comparative Example 5 is an embodiment in which a urethane resin having an anionic group and having a flow initiation temperature outside the range specified in the present invention was used instead of the urethane resin (A). was bad.
• Comparative Example 6 the mass ratio of the urethane resin (A) and water (B) was outside the range defined by the present invention, but the peel strength and texture were poor.

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• 2022
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