WO2019098039A1 - 発泡ウレタンシート、及び、合成皮革 - Google Patents
発泡ウレタンシート、及び、合成皮革 Download PDFInfo
- Publication number
- WO2019098039A1 WO2019098039A1 PCT/JP2018/040669 JP2018040669W WO2019098039A1 WO 2019098039 A1 WO2019098039 A1 WO 2019098039A1 JP 2018040669 W JP2018040669 W JP 2018040669W WO 2019098039 A1 WO2019098039 A1 WO 2019098039A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- urethane resin
- parts
- urethane
- synthetic leather
- Prior art date
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- 239000002649 leather substitute Substances 0.000 title claims abstract description 20
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- 125000000129 anionic group Chemical group 0.000 claims abstract description 8
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 7
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical class CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 3
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Definitions
- the present invention relates to a foamed urethane sheet.
- Polyurethane resins have been used in various applications such as coatings and adhesives because of their excellent mechanical strength and flexibility.
- solvent-based urethane resins containing dimethylformamide (DMF) have been widely used until now, but the legal restrictions on DMF have become stricter every year, and it has become weak solvents, water systems, no solvents, etc. The development of environmentally friendly products is urgently needed.
- DMF dimethylformamide
- aqueous urethane in which a urethane resin is dispersed in water is most actively studied.
- PUD aqueous urethane
- this water-based urethane for various applications, there are also many needs to be molded as a foam for the purpose of improving the texture and the like.
- mechanical foaming in which microcapsules are compounded or a gas such as carbon dioxide is dispersed in a PUD-blended solution has been studied (see, for example, Patent Document 1).
- the texture of the resulting foam may be poor, and the smoothness may be poor due to the expansion of the microcapsules.
- the method of dispersing the gas since the bubbles which are entangled in the mixed solution disappear in the process of producing the foam, it is difficult to control the bubble size etc. and stably obtain the foam with good texture. It was difficult.
- the problem to be solved by the present invention is to provide a foamed urethane sheet excellent in texture and tensile strength using a water-containing urethane resin composition.
- the present invention is formed of a urethane resin composition containing a urethane resin (A), water (B), and a surfactant (C) having 10 or more carbon atoms, and has a density of 200 to 1, 1
- the present invention provides a foamed urethane sheet characterized by having a weight of 000 kg / m 3 .
- this invention is a synthetic leather which has a base material (i) and a polyurethane layer (ii), Comprising: That the said polyurethane layer (ii) was formed by the said foaming urethane sheet It provides a synthetic leather characterized by the above.
- the foamed urethane sheet of the present invention is excellent in feeling and tensile strength.
- foamed urethane sheet when the foamed urethane sheet is applied to synthetic leather, it is possible to uniformly produce an embossing having excellent peel strength and excellent in design on the surface thereof.
- the urethane foam sheet of the present invention contains urethane resin (A), water (B), and urethane containing surfactant (C) having no aromatic ring and having a hydrophobic portion having 10 or more carbon atoms. It is formed of a resin composition and has a density of 200 to 1,000 kg / m 3 .
- the urethane resin (A) can be dispersed in water (B) described later, and, for example, a urethane resin having a hydrophilic group such as an anionic group, a cationic group or a nonionic group; forced by an emulsifier It is possible to use a urethane resin or the like dispersed in water (B). These urethane resins (A) may be used alone or in combination of two or more. Among these, in view of production stability, it is preferable to use a urethane resin having a hydrophilic group, and an aqueous urethane resin having an anionic group is more preferable.
- the method of using 1 or more types of compounds selected from the group which consists of a glycol compound which has a carboxyl group, and a compound which has a sulfonyl group as a raw material is mentioned, for example.
- glycol compound having a carboxyl group examples include, for example, 2,2-dimethylol propionic acid, 2,2-dimethylol butanoic acid, 2,2-dimethylol butyric acid, 2,2-dimethylol propionic acid, and 2,2- Valeric acid etc. can be used. These compounds may be used alone or in combination of two or more.
- Examples of the compound having a sulfonyl group include 3,4-diaminobutanesulfonic acid, 3,6-diamino-2-toluenesulfonic acid, 2,6-diaminobenzenesulfonic acid, N- (2-aminoethyl)- It is possible to use 2-aminoethylsulfonic acid or the like. These compounds may be used alone or in combination of two or more.
- the amount of use in the case of using the raw material used to produce the urethane resin having an anionic group is 0% of the total mass of the raw material of the urethane resin (A), from the viewpoint that much more excellent water dispersion stability is obtained. It is preferably in the range of 1 to 4.8% by mass, more preferably in the range of 0.5 to 4% by mass, and still more preferably in the range of 1 to 3% by mass.
- the carboxyl group and the sulfonyl group may be partially or entirely neutralized to a basic compound in the urethane resin composition.
- the basic compound include organic amines such as ammonia, triethylamine, pyridine and morpholine; alkanolamines such as monoethanolamine and dimethylethanolamine; and metal base compounds containing sodium, potassium, lithium, calcium and the like. Can.
- the method of using 1 type, or 2 or more types of a compound which has an amino group as a raw material is mentioned, for example.
- Examples of the compound having an amino group include compounds having a primary and secondary amino group such as triethylenetetramine and diethylenetriamine; N-alkyldialkanolamines such as N-methyldiethanolamine and N-ethyldiethanolamine; and N-methyl Compounds having a tertiary amino group such as N-alkyldiaminoalkylamine such as diaminoethylamine and N-ethyldiaminoethylamine can be used. These compounds may be used alone or in combination of two or more.
- urethane resin (A) for example, polyisocyanate (a1), polyol (a2), and a reactant of a raw material used to produce the above-described aqueous urethane resin having a hydrophilic group are used. be able to.
- polyisocyanate (a1) examples include aromatic polyisocyanates such as phenylene diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, naphthalene diisocyanate, polymethylene polyphenyl polyisocyanate, carbodiimidated diphenylmethane polyisocyanate, etc .; hexamethylene diisocyanate, Aliphatic or alicyclic polyisocyanates such as lysine diisocyanate, cyclohexane diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, xylylene diisocyanate, tetramethyl xylylene diisocyanate, dimer acid diisocyanate, norbornene diisocyanate and the like can be used. These polyisocyanates may be used alone or in combination of two or
- the amount of the polyisocyanate (a1) used is in the range of 5 to 40% by mass based on the total mass of the raw material of the urethane resin (A) from the viewpoint of production stability and mechanical properties of the obtained film. Preferably, it is in the range of 10 to 30% by mass.
- polyether polyol As said polyol (a2), a polyether polyol, polyester polyol, a polyacryl polyol, a polycarbonate polyol, a polybutadiene polyol etc. can be used, for example. These polyols may be used alone or in combination of two or more.
- the number average molecular weight of the polyol (a2) is preferably in the range of 500 to 8,000, and more preferably in the range of 800 to 4,000, from the viewpoint of the mechanical strength of the obtained film.
- the number average molecular weight of the polyol (a2) is a value measured by gel permeation column chromatography (GPC).
- a chain extender (a2 ') having a number average molecular weight of 50 to 450 may be used in combination with the polyol (a2), if necessary.
- Examples of the chain extender (a2 ′) include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, 1,3-propanediol, 1,3-butanediol and 1,4-butanediol.
- a chain extender having a hydroxyl group such as hexamethylene glycol, sucrose, methylene glycol, glycerin, sorbitol, bisphenol A, 4,4'-dihydroxydiphenyl, 4,4'-dihydroxydiphenyl ether, trimethylolpropane, etc .; -Propanediamine, 1,6-hexamethylenediamine, piperazine, 2,5-dimethylpiperazine, isophoronediamine, 1,2-cyclohexanediamine, 1,3-cyclohexanediamine, 1,4-cycle Using chain extenders having an amino group such as hexane diamine, 4,4'-dicyclohexyl methane diamine, 3,3'-dimethyl-4,4'- dicyclohexyl methane diamine, 1,4-cyclohexane diamine, hydrazine etc. it can. These chain extenders may be used alone or in combination of two or more.
- urethane resin (A) It is preferably in the range of 0.8 to 4.3% by mass, more preferably in the range of 1 to 3.5% by mass, and in the range of 1.5 to 3.2% by mass in the total mass of the raw materials of It is further preferred that
- the urethane resin (A) for example, the polyol (a2), a raw material used to produce the urethane resin having the hydrophilic group, the chain extender (a2 ′), and the polyisocyanate ( There is a method in which a1) is charged in one batch and reacted. These reactions may be carried out, for example, at 50 to 100 ° C. for 3 to 10 hours.
- the molar ratio [isocyanate group / (hydroxy group and amino group)] of the sum of hydroxyl group and amino group possessed by ') and isocyanate group possessed by the polyisocyanate (a1) is in the range of 0.8 to 1.2. It is preferably present, and more preferably in the range of 0.9 to 1.1.
- the isocyanate group which remains in the said urethane resin (A).
- an alcohol having one hydroxyl group such as methanol.
- the amount of the alcohol used is preferably in the range of 0.001 to 10 parts by mass with respect to 100 parts by mass of the urethane resin (A).
- the organic solvent examples include ketone compounds such as acetone and methyl ethyl ketone; ether compounds such as tetrahydrofuran and dioxane; acetic acid ester compounds such as ethyl acetate and butyl acetate; nitrile compounds such as acetonitrile; and dimethylformamide, N-methylpyrrolidone and the like An amide compound etc. can be used.
- These organic solvents may be used alone or in combination of two or more. The organic solvent is preferably removed by distillation or the like when the final urethane resin composition is obtained.
- the foam generated in the foaming step to be described later is stably held (particularly in the drying step), and the density of the urethane foam sheet is stably 200 to 1,000 kg /
- the temperature is preferably 80 ° C. or higher, and more preferably in the range of 80 to 220 ° C. in that it can be in the range of m 3 .
- polystyrene resin As a method of adjusting the flow start temperature high, for example, using a polyol with high crystallinity such as polycarbonate polyol as the polyol (a2), increasing the amount of use of the chain extender (a2 ′), polyisocyanate As (a1), use is made of polyisocyanate having high crystallinity such as dicyclohexylmethane diisocyanate and 4,4′-diphenylmethane diisocyanate.
- polysocyanate having high crystallinity such as dicyclohexylmethane diisocyanate and 4,4′-diphenylmethane diisocyanate.
- the flow start temperature of the said urethane resin (A) can be adjusted by selecting these methods suitably.
- the measuring method of the flow start temperature of the said urethane resin (A) is described in the Example mentioned later.
- urethane resin having an anionic group When a urethane resin having an anionic group is used as the urethane resin (A), it is easy to adjust the flow initiation temperature, and from the viewpoint of further excellent bubble retention, texture, and tensile strength, 4,4 '-Diphenylmethane diisocyanate, toluene diisocyanate, cyclohexylmethane diisocyanate, and isophorone diisocyanate, at least one polyisocyanate selected from the group consisting of: polyol (a2), glycol compound having a carboxyl group, chain extender having a hydroxyl group ( It is preferable to use a urethane resin (A-A-1) having an anionic group which is a reactant of a chain extender containing a2 ′).
- water (B) for example, ion exchange water, distilled water or the like can be used. These waters may be used alone or in combination of two or more.
- the mass ratio [(A) / (B)] of the urethane resin (A) to the water (B) is in the range of 10/80 to 70/30 from the viewpoint of water dispersion stability and workability. It is preferable that the ratio be in the range of 20/80 to 60/40.
- the surfactant (C) it is essential to use one having no aromatic ring and having a hydrophobic part having 10 or more carbon atoms in order to prevent the foam generated by foaming from disappearing. .
- surfactant (C) for example, a surfactant represented by the following general formula (1); fatty acid salt, succinate, sulfosuccinate, octadecylsulfosuccinate, sulfosuccinate, etc. may be used it can. These surfactants may be used alone or in combination of two or more.
- R represents an alkyl group having a linear or branched structure having 10 to 20 carbon atoms
- X represents Na, K, NH 4 , morpholine, ethanolamine, or triethanolamine.
- the surfactant represented by the above-mentioned general formula (1) is preferably used because it has further excellent foam retention among the above-mentioned surfactants, and the number of carbon atoms is preferably It is more preferable to use one showing a linear alkyl group of 13 to 19, and a stearate is more preferable.
- the said urethane resin composition contains the said urethane resin (A), water (B), and surfactant (C) as an essential component, you may contain another additive as needed.
- a crosslinking agent As said other additive, a crosslinking agent, a neutralizing agent, a thickener, a urethanization catalyst, a filler, a pigment, a dye, a flame retardant, a leveling agent, an antiblocking agent etc. can be used, for example.
- These additives may be used alone or in combination of two or more.
- crosslinking agent it is used for the purpose of the improvement of the mechanical strength of a foaming urethane sheet etc.
- a polyisocyanate crosslinking agent an epoxy crosslinking agent, a melamine crosslinking agent, an oxazoline crosslinking agent etc.
- crosslinking agents may be used alone or in combination of two or more.
- the range of ⁇ 50 parts by mass is more preferable, the range of 0.5 ⁇ 30 parts by mass is further preferable, and 1 ⁇ 10 parts by mass is particularly preferable.
- the foamed urethane sheet is produced by foaming the urethane resin composition to obtain a foaming liquid, applying the foaming liquid to a substrate and drying it to obtain a density of 200 to 1,000 kg / m 3. Be done.
- the method of using mixers such as stirring by a hand and a mechanical mixer, is mentioned, for example.
- a mixer for example, a method of stirring at 500 to 3,000 rpm for 10 seconds to 3 minutes can be mentioned.
- the volume of the foamed urethane sheet is preferably adjusted to 1.3 to 7 times before and after foaming, from the viewpoint of easily adjusting the density of the foamed urethane sheet within the range defined in the present invention. It is more preferable to use a volume, and it is further preferable to use a volume of 1.3 to 1.7 times.
- Examples of the method of drying the coated material include a method of drying at a temperature of 60 to 130 ° C. for 30 seconds to 10 minutes.
- the thickness of the urethane foam sheet obtained by the above method is, for example, 5 to 200 ⁇ m.
- the density of the foamed urethane sheet is 200 to 1,000 kg / m 3 . If the said density is this range, it will become the sheet
- the density is preferably in the range from the point it is available in a variety of applications of 300 ⁇ 900kg / m 3 as foamed urethane sheet, more preferably in the range of 400 ⁇ 800kg / m 3.
- the density of the urethane foam sheet is a value calculated by dividing the mass of the urethane foam sheet by the volume.
- the synthetic leather of the present invention is a synthetic leather having at least a substrate (i) and a polyurethane layer (ii), wherein the polyurethane layer (ii) is formed of the foamed urethane sheet.
- (X) A method of foaming the urethane resin composition to obtain a foam, applying the foam on a release paper, drying it, and bonding it to the substrate (i).
- (Y) A method of foaming the urethane resin composition to obtain a foaming liquid, and applying the foaming liquid on a skin layer prepared on a release paper, drying it, and bonding it to the substrate (i) ,
- (Z) The urethane resin composition is foamed to obtain a foaming liquid, which is applied onto the substrate (i), dried, and, if necessary, on the release paper.
- epidermis layer (iii), etc. are mentioned.
- Examples of the substrate (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, Fiber substrates of non-woven fabric, woven fabric, knitted fabric, etc. by their blended fibers etc .; said non-woven fabric impregnated with resin such as polyurethane resin; said non-woven fabric further provided with porous layer; thermoplastic urethane (TPU) And the like can be used.
- 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, Fiber substrates of non-woven fabric, woven fabric, knitted fabric, etc. by their blended fibers etc .
- said non-woven fabric impregnated with resin such as polyurethane resin
- said non-woven fabric further provided with porous layer
- thermoplastic urethane (TPU) And the like can be
- the polyurethane layer (ii) is formed of the foam sheet, and the density thereof is 300 to 900 kg / kg, from the viewpoint of being able to obtain a synthetic leather having a more excellent feel and peel strength.
- the range of m 3 is preferable, and the range of 400 to 800 kg / m 3 is more preferable.
- the density of the polyurethane layer (ii) is obtained by dividing the weight of the synthetic leather per 10 cm square by the weight of the base material (i) per 10 cm square, by the thickness of the polyurethane layer (ii). Indicates In addition, the density of the said polyurethane layer (ii) can be adjusted with the foaming condition of the said urethane resin composition.
- the skin layer (iii) can be formed of a known material by a known method, and for example, a solvent-based urethane resin, a water-based urethane resin, a silicone resin, a polypropylene resin, a polyester resin, etc. can be used.
- a solvent-based urethane resin a water-based urethane resin
- a silicone resin a silicone resin
- a polypropylene resin a polyester resin, etc.
- a polyester resin etc.
- water-based polycarbonate type urethane resin for DMF reduction by environmental response.
- a surface treatment layer (iv) may be provided on the surface layer (iii) for the purpose of improving scratch resistance and the like.
- the surface treatment layer (iv) can be formed of a known material by a known method.
- the synthetic leather of the present invention is capable of uniformly producing an embossing having excellent peel strength and excellent design on the surface by using the above-described foamed urethane sheet having excellent feeling and tensile strength. It is.
- a release paper provided with a design such as a concavo-convex pattern is placed on the polyurethane layer (ii) of synthetic leather, and heat is applied by a preheated roll or the like.
- a method of pressing; a method of heat pressing using a roll coater provided with design properties such as a concavo-convex pattern etc. may be mentioned.
- the roll can be heated at 50 to 200.degree.
- a methyl ethyl ketone solution of a urethane resin After mixing 70 parts by mass of polyoxyethylene distyrenated phenyl ether (Hydrophile-Lipophile Balance (hereinafter abbreviated as "HLB"); 14) and 13 parts by mass of triethylamine in this urethane resin solution, deionized water 800 is prepared. An emulsion liquid in which the urethane resin (A-1) was dispersed in water was obtained by adding a mass part and performing phase inversion emulsification. Subsequently, methyl ethyl ketone was distilled away from the emulsion to obtain a urethane resin composition containing 50% by mass of the urethane resin (A-1).
- HLB Hydroethylene distyrenated phenyl ether
- a methyl ethyl ketone solution of a urethane resin was added to stop the reaction to obtain a methyl ethyl ketone solution of a urethane resin.
- the urethane resin solution is mixed with 70 parts by mass of polyoxyethylene distyrenated phenyl ether (HLB; 14) and 13 parts by mass of triethylamine, and then 800 parts by mass of ion exchange water is added to cause phase inversion emulsification.
- An emulsion was obtained in which the resin (A-2) was dispersed in water.
- methyl ethyl ketone was distilled away from the emulsion to obtain a urethane resin composition containing 50% by mass of the urethane resin (A-2).
- the urethane resin solution is mixed with 70 parts by mass of polyoxyethylene distyrenated phenyl ether (HLB; 14) and 13 parts by mass of triethylamine, and then 800 parts by mass of ion exchange water is added to cause phase inversion emulsification.
- An emulsion was obtained in which the resin (A-3) was dispersed in water.
- methyl ethyl ketone was distilled away from the emulsion to obtain a urethane resin composition containing 50% by mass of the urethane resin (A-3).
- HLB Hydrophile-Lipophile Balance
- a urethane resin composition was obtained by mixing 21 parts by mass of ethylene diamine and 189 parts of ion-exchanged water with the obtained emulsion and conducting chain elongation reaction. Subsequently, methyl ethyl ketone and water were distilled away from the urethane resin composition to obtain a urethane resin composition containing 50% by mass of the urethane resin (A-4).
- HLB Hydrophile-Lipophile Balance
- ion-exchanged water 2 By adding 650 parts by mass, phase inversion emulsification was carried out to obtain an emulsion in which the urethane prepolymer was dispersed in water.
- a urethane resin composition was obtained by mixing 21 parts by mass of ethylene diamine and 189 parts of ion-exchanged water with the obtained emulsion and conducting chain elongation reaction. Subsequently, methyl ethyl ketone and water were distilled away from the urethane resin composition to obtain a urethane resin composition containing 50% by mass of the urethane resin (A-5).
- HLB Hydrophile-Lipophile Balance
- a urethane resin composition was obtained by mixing 21 parts by mass of ethylene diamine and 189 parts of ion-exchanged water with the obtained emulsion and conducting chain elongation reaction. Subsequently, methyl ethyl ketone and water were distilled away from the urethane resin composition to obtain a urethane resin composition containing 50% by mass of the urethane resin (A-6).
- Example 1 To 100 parts by mass of the urethane resin composition obtained in Synthesis Example 1, 2 parts by mass of a thickener (“Borchi Gel ALA” manufactured by Borchers), 0.5 parts by mass of ammonium stearate, a crosslinking agent (manufactured by Nippon Shokubai Co., Ltd.) 4 parts by mass of “Epocross WS-700” was added, and the mixture was stirred at 2,000 rpm for 1 minute using a mechanical mixer to foam, and a 1.5-fold volume of a foaming liquid was obtained. This was applied to a release paper and dried at 80 ° C. for 3 minutes, and further dried at 120 ° C. for 2 minutes to produce a foamed urethane sheet.
- a thickener (“Borchi Gel ALA” manufactured by Borchers)
- a crosslinking agent manufactured by Nippon Shokubai Co., Ltd.
- Examples 2 to 8 A foamed urethane sheet was obtained in the same manner as in Example 1 except that the type of the aqueous urethane resin composition used and the amount of ammonium stearate used were changed as shown in Tables 1 to 3.
- Comparative Example 1 To 100 parts by mass of the urethane resin composition obtained in Synthesis Example 1, 2 parts by mass of a thickener (“Borchi Gel ALA” manufactured by Borchers), 1.5 parts by mass of sodium dodecylbenzene sulfonate, a crosslinking agent Four parts by mass of “Epocross WS-700” (manufactured by Company) were added, and the mixture was stirred at 2,000 rpm for 1 minute using a mechanical mixer to foam, and a volume of 1.5 times the volume was obtained. This was applied to a release paper and dried at 80 ° C. for 3 minutes, and further dried at 120 ° C. for 2 minutes to produce a sheet.
- a thickener (“Borchi Gel ALA” manufactured by Borchers)
- sodium dodecylbenzene sulfonate 1.5 parts by mass of sodium dodecylbenzene sulfonate
- a crosslinking agent Four parts by mass of “Epocross WS-700
- the number average molecular weight of the polyol etc. used in the synthesis example was measured by gel permeation column chromatography (GPC) under the following conditions.
- Measuring device High-speed GPC device ("HLC-8220GPC” manufactured by Tosoh Corporation) Column: The following columns manufactured by Tosoh Corporation were used in series connection. "TSKgel G5000" (7.8 mm ID ⁇ 30 cm) ⁇ 1 "TSK gel G 4000” (7.8 mm ID ⁇ 30 cm) ⁇ 1 "TSK gel G 3000" (7.8 mm ID ⁇ 30 cm) ⁇ 1 This "TSKgel G2000" (7.8 mm ID ⁇ 30 cm) ⁇ 1 detector: RI (differential refractometer) Column temperature: 40 ° C Eluent: Tetrahydrofuran (THF) Flow rate: 1.0 mL / min Injection volume: 100 ⁇ L (tetrahydrofuran solution with a sample concentration of 0.4% by mass) Standard sample: A calibration curve was prepared using the following standard polystyrene.
- Examples 1 to 8 which are the foamed urethane sheets of the present invention, have excellent texture and tensile strength.
- Comparative Example 1 is an embodiment using sodium dodecylbenzene sulfonate having an aromatic ring instead of the surfactant (C), but the foam retention is poor, and the texture of the sheet is hard and poor.
- C surfactant
- Comparative Example 2 is an embodiment in which the surfactant (C) is not used, but the foam retention is poor, and the texture of the sheet is hard and poor.
- Comparative Example 3 is an embodiment in which the expansion ratio is excessive and the density is less than the range specified in the present invention, but the tensile strength is poor.
- Example 9 To 100 parts by mass of the urethane resin composition obtained in Synthesis Example 1, 2 parts by mass of a thickener ("Borch Gel ALA" manufactured by Borchers), 1.5 parts by mass of ammonium stearate, a crosslinking agent (manufactured by Nippon Shokubai Co., Ltd.) 4 parts by mass of “Epocross WS-700” was added, and the mixture was stirred at 2,000 rpm for 1 minute using a mechanical mixer to foam, and a 1.5-fold volume of a foaming liquid was obtained. This was applied to a polyester fiber non-woven fabric and dried at 80 ° C. for 3 minutes and further at 120 ° C. for 2 minutes to form a polyurethane layer. Subsequently, the release paper to which the uneven
- a thickener (“Borch Gel ALA” manufactured by
- Example 10 to 12 A synthetic leather was obtained in the same manner as in Example 9, except that the type of urethane resin composition used and the amount of ammonium stearate used were changed as shown in Table 4.
- Examples 9 to 12 which are synthetic leathers of the present invention, were found to have excellent feel, peel strength, and embossing.
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Abstract
Description
(X)前記ウレタン樹脂組成物を起泡させ起泡液を得、この起泡液を離型紙上に塗布し、乾燥させ、前記基材(i)と貼り合わせる方法、
(Y)前記ウレタン樹脂組成物を起泡させ起泡液を得、この起泡液を、離型紙上に作製した表皮層上に塗布し、乾燥させ、前記基材(i)と貼り合わせる方法、
(Z)前記ウレタン樹脂組成物を起泡させ起泡液を得、この起泡液を前記基材(i)上に塗布し、乾燥させ、必要に応じて、その上に、離型紙上に作製した表皮層(iii)を貼り合わせる方法などが挙げられる。
メチルエチルケトン3,281質量部及びオクチル酸第一錫0.1質量部の存在下、ポリカーボネートポリオール(「ニッポラン980R」日本ポリウレタン株式会社製、数平均分子量;2,000)1,000質量部と、2,2-ジメチロールプロピオン酸17質量部と、エチレングリコール47質量部と、ジフェニルメタンジイソシアネート(以下、「MDI」と略記する。)344質量部とを溶液粘度が20,000mPa・sに達するまで70℃で反応させた後、メタノール3質量部を加えて反応を停止させてウレタン樹脂のメチルエチルケトン溶液を得た。このウレタン樹脂溶液にポリオキシエチレンジスチレン化フェニルエーテル(Hydrophile-Lipophile Balance(以下、「HLB」と略記する);14)70質量部と、トリエチルアミン13質量部を混合させた後に、イオン交換水800質量部を加えて転相乳化させることで前記ウレタン樹脂(A-1)が水に分散した乳化液を得た。
次いで、前記乳化液からメチルエチルケトンを留去することによって、ウレタン樹脂(A-1)50質量%を含むウレタン樹脂組成物を得た。
メチルエチルケトン3,281質量部及びオクチル酸第一錫0.1質量部の存在下、ポリエーテルポリオール(「PTMG2000」三菱化型株式会社製、数平均分子量;2,000)1,000質量部と、2,2-ジメチロールプロピオン酸17質量部と、エチレングリコール47質量部と、MDIを344質量部とを溶液粘度が20,000mPa・sに達するまで70℃で反応させた後、メタノール3質量部を加えて反応を停止させてウレタン樹脂のメチルエチルケトン溶液を得た。このウレタン樹脂溶液にポリオキシエチレンジスチレン化フェニルエーテル(HLB;14)70質量部と、トリエチルアミン13質量部を混合させた後に、イオン交換水800質量部を加えて転相乳化させることで前記ウレタン樹脂(A-2)が水に分散した乳化液を得た。
次いで、前記乳化液からメチルエチルケトンを留去することによって、ウレタン樹脂(A-2)50質量%を含むウレタン樹脂組成物を得た。
メチルエチルケトン3,281質量部及びオクチル酸第一錫0.1質量部の存在下、ポリエステルポリオール(「プラクセル220」株式会社ダイセル製、数平均分子量;2,000)1,000質量部と、2,2-ジメチロールプロピオン酸17質量部と、エチレングリコール47質量部と、MDIを344質量部とを溶液粘度が20,000mPa・sに達するまで70℃で反応させた後、メタノール3質量部を加えて反応を停止させてウレタン樹脂のメチルエチルケトン溶液を得た。このウレタン樹脂溶液にポリオキシエチレンジスチレン化フェニルエーテル(HLB;14)70質量部と、トリエチルアミン13質量部を混合させた後に、イオン交換水800質量部を加えて転相乳化させることで前記ウレタン樹脂(A-3)が水に分散した乳化液を得た。
次いで、前記乳化液からメチルエチルケトンを留去することによって、ウレタン樹脂(A-3)50質量%を含むウレタン樹脂組成物を得た。
メチルエチルケトン1,279質量部及びオクチル酸第一錫0.1質量部の存在下、ポリカーボネートポリオール(「ニッポラン980R」日本ポリウレタン株式会社製、数平均分子量;2,000)1,000質量部と、2,2-ジメチロールプロピオン酸17質量部と、ジシクロヘキシルメタンジイソシアネート(以下、「H12MDI」と略記する。)262質量部とを、イソシアネート濃度が1.2質量%に達するまで70℃で反応させてウレタンプレポリマーのメチルエチルケトン溶液を得た。このウレタン樹脂溶液にポリオキシエチレンジスチレン化フェニルエーテル(Hydrophile-Lipophile Balance(以下、「HLB」と略記する);14)64質量部と、トリエチルアミン28質量部を混合させた後に、イオン交換水2,650質量部を加えて転相乳化させることで前記ウレタンプレポリマーが水に分散した乳化液を得た。得られた乳化液にエチレンジアミン21質量部とイオン交換水189部を混合し鎖伸長反応することによってウレタン樹脂組成物を得た。
次いで、ウレタン樹脂組成物からメチルエチルケトンと水分を留去することによって、ウレタン樹脂(A-4)50質量%を含むウレタン樹脂組成物を得た。
メチルエチルケトン1,279質量部及びオクチル酸第一錫0.1質量部の存在下、ポリエーテルポリオール(「PTMG2000」三菱化型株式会社製、数平均分子量;2,000)1,000質量部と、2,2-ジメチロールプロピオン酸17質量部と、H12MDI 262質量部とを、イソシアネート濃度が1.2質量%に達するまで70℃で反応させてウレタン樹脂プレポリマー(A‘-2)のメチルエチルケトン溶液を得た。このウレタン樹脂溶液にポリオキシエチレンジスチレン化フェニルエーテル(Hydrophile-Lipophile Balance(以下、「HLB」と略記する);14)64質量部と、トリエチルアミン28質量部を混合させた後に、イオン交換水2,650質量部を加えて転相乳化させることで前記ウレタンプレポリマーが水に分散した乳化液を得た。得られた乳化液にエチレンジアミン21質量部とイオン交換水189部を混合し鎖伸長反応することによってウレタン樹脂組成物を得た。
次いで、ウレタン樹脂組成物からメチルエチルケトンと水分を留去することによって、ウレタン樹脂(A-5)50質量%を含むウレタン樹脂組成物を得た。
メチルエチルケトン1,279質量部及びオクチル酸第一錫0.1質量部の存在下、ポリエステルポリオール(「プラクセル220」株式会社ダイセル製、数平均分子量;2,000)1,000質量部と、2,2-ジメチロールプロピオン酸17質量部と、H12MDI 262質量部とを、イソシアネート濃度が1.2質量%に達するまで70℃で反応させてウレタン樹脂プレポリマーのメチルエチルケトン溶液を得た。このウレタン樹脂溶液にポリオキシエチレンジスチレン化フェニルエーテル(Hydrophile-Lipophile Balance(以下、「HLB」と略記する);14)64質量部と、トリエチルアミン28質量部を混合させた後に、イオン交換水2,650質量部を加えて転相乳化させることで前記ウレタンプレポリマーが水に分散した乳化液を得た。得られた乳化液にエチレンジアミン21質量部とイオン交換水189部を混合し鎖伸長反応することによってウレタン樹脂組成物を得た。
次いで、ウレタン樹脂組成物からメチルエチルケトンと水分を留去することによって、ウレタン樹脂(A-6)50質量%を含むウレタン樹脂組成物を得た。
合成例1で得られたウレタン樹脂組成物100質量部に、増粘剤(Borchers社製「Borchi Gel ALA」)2質量部、ステアリン酸アンモニウム0.5質量部、架橋剤(日本触媒株式会社製「エポクロスWS-700」)4質量部を加え、メカニカルミキサーを使用して2,000rpmで1分間撹拌し、起泡させ、1.5倍の体積にした起泡液を得た。
これを離型紙に塗布し、80℃で3分間、さらに120℃で2分間乾燥させることで、発泡ウレタンシートを製造した。
用いる水性ウレタン樹脂組成物の種類、及び、ステアリン酸アンモニウムの使用量を表1~3に示す通りに変更した以外は、実施例1と同様にして発泡ウレタンシートを得た。
合成例1で得られたウレタン樹脂組成物100質量部に、増粘剤(Borchers社製「Borchi Gel ALA」)2質量部、ドデシルベンゼンスルホン酸ナトリウム1.5質量部、架橋剤(日本触媒株式会社製「エポクロスWS-700」)4質量部を加え、メカニカルミキサーを使用して2,000rpmで1分間撹拌し、起泡させ、1.5倍の体積にした起泡液を得た。
これを離型紙に塗布し、80℃で3分間、さらに120℃で2分間乾燥させることで、シートを製造した。
合成例1で得られたウレタン樹脂組成物100質量部に、増粘剤(Borchers社製「Borchi Gel ALA」)2質量部、架橋剤(日本触媒株式会社製「エポクロスWS-700」)4質量部を加え、メカニカルミキサーを使用して2,000rpmで1分間撹拌し、起泡させ、1.5倍の体積にした起泡液を得た。
これを離型紙に塗布し、80℃で3分間、さらに120℃で2分間乾燥させたところ、乾燥工程にて泡が消失したため、ほぼ無孔のシートを形成した
合成例1で得られたウレタン樹脂組成物100質量部に、増粘剤(Borchers社製「Borchi Gel ALA」)2質量部、ドデシルベンゼンスルホン酸ナトリウム1.5質量部、ステアリン酸アンモニウム1質量部、架橋剤(日本触媒株式会社製「エポクロスWS-700」)4質量部を加え、メカニカルミキサーを使用して2,000rpmで1分間撹拌し、起泡させ、7倍の体積にした起泡液を得た。
これを離型紙に塗布し、80℃で3分間、さらに120℃で2分間乾燥させることで、シートを製造した。
合成例で用いたポリオール等の数平均分子量は、ゲル・パーミエーション・カラムクロマトグラフィー(GPC)法により、下記の条件で測定した。
カラム:東ソー株式会社製の下記のカラムを直列に接続して使用した。
「TSKgel G5000」(7.8mmI.D.×30cm)×1本
「TSKgel G4000」(7.8mmI.D.×30cm)×1本
「TSKgel G3000」(7.8mmI.D.×30cm)×1本
「TSKgel G2000」(7.8mmI.D.×30cm)×1本
検出器:RI(示差屈折計)
カラム温度:40℃
溶離液:テトラヒドロフラン(THF)
流速:1.0mL/分
注入量:100μL(試料濃度0.4質量%のテトラヒドロフラン溶液)
標準試料:下記の標準ポリスチレンを用いて検量線を作成した。
東ソー株式会社製「TSKgel 標準ポリスチレン A-500」
東ソー株式会社製「TSKgel 標準ポリスチレン A-1000」
東ソー株式会社製「TSKgel 標準ポリスチレン A-2500」
東ソー株式会社製「TSKgel 標準ポリスチレン A-5000」
東ソー株式会社製「TSKgel 標準ポリスチレン F-1」
東ソー株式会社製「TSKgel 標準ポリスチレン F-2」
東ソー株式会社製「TSKgel 標準ポリスチレン F-4」
東ソー株式会社製「TSKgel 標準ポリスチレン F-10」
東ソー株式会社製「TSKgel 標準ポリスチレン F-20」
東ソー株式会社製「TSKgel 標準ポリスチレン F-40」
東ソー株式会社製「TSKgel 標準ポリスチレン F-80」
東ソー株式会社製「TSKgel 標準ポリスチレン F-128」
東ソー株式会社製「TSKgel 標準ポリスチレン F-288」
東ソー株式会社製「TSKgel 標準ポリスチレン F-550」
合成例で得られた水性ウレタン樹脂組成物を離型紙に塗布し(塗布厚さ150μm)、熱風乾燥機にて70℃、4分間、次いで120℃で2分間乾燥することで乾燥物を得た。この乾燥物を、株式会社島津製作所製フローテスター「CFT-500A」(口径1mm、長さ1mmのダイスを使用、荷重98N、昇温速度3℃/分)を使用して、流動開始温度を測定した。
得られた発泡ウレタンシートを手で触り、以下のように評価した。
「A」:柔軟性に富む。
「B」:やや柔軟性がある。
「C」:柔軟性が劣る。
「D」:硬い。
得られたウレタンシートを幅10mm、長さ60mmに裁断したものを試験片とした。この試験片の両端をチャックで挟み、引張試験機「オートグラフAG-I」(株式会社島津製作所製)を使用して、温度23℃、湿度60%の雰囲気下で、クロスヘッドスピード300mm/分で引張り、100%伸長時における引張強度を測定し、以下のように評価した。
「T」:10N/cm2以上
「F」:10N/cm2未満
合成例1で得られたウレタン樹脂組成物100質量部に、増粘剤(Borchers社製「Borch Gel ALA」)2質量部、ステアリン酸アンモニウム1.5質量部、架橋剤(日本触媒株式会社製「エポクロスWS-700」)4質量部を加え、メカニカルミキサーを使用して2,000rpmで1分間撹拌し、起泡させ、1.5倍の体積にした起泡液を得た。
これをポリエステル繊維不織布に塗布し、80℃で3分間、さらに120℃で2分間乾燥させることで、ポリウレタン層を形成した。次いで、得られたポリウレタン層上に、凹凸パターンが施された離型紙を載置し、180℃で予熱したロールプレスを施すことでエンボス加工された合成皮革を得た。
用いるウレタン樹脂組成物の種類、及び、ステアリン酸アンモニウムの使用量を表4に示す通りに変更した以外は、実施例9と同様にして合成皮革を得た。
得られた合成皮革を手で触り、以下のように評価した。
「A」:柔軟性に富む。
「B」:やや柔軟性がある。
「C」:柔軟性が劣る。
「D」:硬い。
実施例及び比較例で得られた合成皮革を、島津オートグラフ「AG-1」(株式会社島津製作所製)を使用して、フルスケール5kg、ヘッドスピード20mm/分の条件にて剥離強度を測定し、以下のように評価した。
「A」:0.15MPa以上
「B」:0.1MPa以上0.15MPa未満
「C」:0.1MPa未満
実施例及び比較例で得られた合成皮革を目視で観察し、以下のように評価した。
「T」:エンボス加工により形成された表面上のシワが均一に作製できている。
「F」:エンボス加工により形成された表面上のシワが均一でない。
Claims (6)
- ウレタン樹脂(A)、水(B)、及び、芳香環を有さず、かつ炭素原子数が10以上の疎水部を有する界面活性剤(C)を含有するウレタン樹脂組成物により形成された、密度が200~1,000kg/m3であることを特徴とする発泡ウレタンシート。
- 前記界面活性剤(C)が、ステアリン酸塩である請求項1記載の発泡ウレタンシート。
- 前記ウレタン樹脂(A)が、アニオン性基を有するものである請求項1又は2記載の発泡ウレタンシート。
- 前記ウレタン樹脂(A)の流動開始温度が、80℃以上である請求項1~3のいずれか1項記載の発泡ウレタンシート。
- 少なくとも、基材(i)、及び、ポリウレタン層(ii)を有する合成皮革であって、
前記ポリウレタン層(ii)が、請求項1~4のいずれか1項記載の発泡ウレタンシートにより形成されているものであることを特徴とする合成皮革。 - 前記ポリウレタン層(ii)が、エンボス加工されているものである請求項5記載の合成皮革。
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CN201880064067.8A CN111164141B (zh) | 2017-11-15 | 2018-11-01 | 发泡氨基甲酸酯片和合成皮革 |
KR1020207009582A KR102409657B1 (ko) | 2017-11-15 | 2018-11-01 | 발포 우레탄 시트, 및 합성 피혁 |
JP2019507957A JP6521349B1 (ja) | 2017-11-15 | 2018-11-01 | 発泡ウレタンシート、及び、合成皮革 |
EP18877423.6A EP3712203A4 (en) | 2017-11-15 | 2018-11-01 | URETHANE FOAM SHEET AND SYNTHETIC LEATHER |
US16/761,684 US20210164157A1 (en) | 2017-11-15 | 2018-11-01 | Foamed urethane sheet and synthetic leather |
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US20240102234A1 (en) * | 2019-10-28 | 2024-03-28 | Dic Corporation | Foam sheet and synthetic leather |
CN114106673A (zh) * | 2020-08-31 | 2022-03-01 | Oppo广东移动通信有限公司 | 壳体、壳体制备方法及电子设备 |
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