WO2018092469A1 - 酸化防止剤及びその製造方法、ポリウレタン弾性繊維 - Google Patents
酸化防止剤及びその製造方法、ポリウレタン弾性繊維 Download PDFInfo
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- WO2018092469A1 WO2018092469A1 PCT/JP2017/036651 JP2017036651W WO2018092469A1 WO 2018092469 A1 WO2018092469 A1 WO 2018092469A1 JP 2017036651 W JP2017036651 W JP 2017036651W WO 2018092469 A1 WO2018092469 A1 WO 2018092469A1
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- 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
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- 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
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- 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
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
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- 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
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3215—Polyhydroxy compounds containing aromatic groups or benzoquinone groups
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- 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
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- 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
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
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- 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
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/70—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/12—Applications used for fibers
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2501/00—Wearing apparel
- D10B2501/02—Underwear
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2501/00—Wearing apparel
- D10B2501/04—Outerwear; Protective garments
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2509/00—Medical; Hygiene
- D10B2509/02—Bandages, dressings or absorbent pads
- D10B2509/026—Absorbent pads; Tampons; Laundry; Towels
Definitions
- the present invention relates to an antioxidant, a polyurethane elastic fiber, and a method for producing a polyurethane compound.
- This application claims priority based on Japanese Patent Application No. 2016-222292 for which it applied to Japan on November 15, 2016, and uses the content here.
- Polyurethane elastic fiber has high elongation and excellent elastic properties and is widely used for various clothing, but it is easily colored and deteriorated by light, heat, combustion gas, etc., and stable to prevent it. Agents are blended, and various stabilization methods have been proposed.
- Patent Document 1 discloses a stabilizer for polyurethane obtained from a specific trifunctional phenol compound and an organic diisocyanate compound.
- a hindered phenol compound having steric hindrance is used as the trifunctional phenol compound, and an aliphatic or alicyclic diisocyanate compound is used as the organic diisocyanate compound.
- Patent Document 2 discloses a method for stabilizing a polyurethane in which a specific hindered phenol compound having an acrylate group is subjected to a Michael addition reaction with a terminal amino group of the polyurethane.
- Patent Document 3 discloses that by using a polycondensate of p-cresol and dicyclopentadiene as a stabilizer, a polyurethane elastic fiber that is stable even in dry cleaning can be obtained.
- polyurethane polymers used for polyurethane elastic fibers are relatively unstable polymers.
- both ends of the polyurethane polymer are chain-extended with a diamine or diol, as described in Patent Documents 1 to 3, and a terminal stopper. Inactive treatment is performed.
- the reaction product of both ends of the polyurethane with an amino group at both ends of the polyurethane has an amino group and an ester group in the vicinity of the same molecule.
- the ester group easily hydrolyzes in the molecule, and the effective group of the antioxidant function falls off from the polymer end, so in dry cleaning after washing treatment, Extraction resistance to dry cleaning solvent disappears.
- the degree of polymerization is limited due to side reactions and impurities in the raw material during the production of the stabilizer, and those having a molecular weight of 1500 or less are considerably included. Most of the components having a molecular weight of 1500 or less are extracted into the solvent, and the loss of active ingredients is large. A component having a molecular weight of 5000 or more impairs the affinity with a polyurethane polymer and the solubility with a DMAc solvent. Further, since a BF 3 polymerization catalyst or a strong acid catalyst of sulfuric acid is used, the manufacturing process such as a neutralization step for removing the catalyst, a washing step, a liquid separation step, and a solvent distillation step becomes complicated. In addition, since a strong acid catalyst is used, a reaction apparatus of an acid resistant material having acid corrosion resistance is also required.
- the present invention has been made in view of the above circumstances, and has excellent spinning stability, less scum generation, high strength retention after light resistance test even after washing treatment / dry cleaning treatment, and coloring durability. It is an object of the present invention to provide a polyurethane elastic fiber that is excellent and has a low decrease in heat resistance, and an antioxidant therefor.
- the inventors of the present invention have excellent spinning stability by using a polyurethane compound terminal added with a hindered phenol compound via a urethane bond as an antioxidant.
- the present inventors have found that a polyurethane elastic fiber that is less likely to occur and has excellent durability against washing treatment and dry cleaning treatment can be obtained.
- the present invention includes the following aspects.
- Y 1 is a residue of diol, and a plurality of Y 1 may be the same or different.
- R 1 is a residue of an aromatic diisocyanate, and a plurality of R 1 may be the same or different.
- X 1 is a residue of a hindered phenol compound having k or more hindered phenolic hydroxyl groups, and a plurality of X 1 may be the same or different.
- m is an integer of 1 or more
- n is an integer of 1 or more
- k is an integer of 2 or more.
- the hindered phenol compound is a hindered phenol compound represented by the formula X 1 (OH) k , and is represented by any one of the following formulas (6) to (11):
- R 2 , R 3 and R 6 are each independently a hydrogen atom or a methyl group. * Represents a bonding position.
- R 2 , R 5 and R 6 are each independently a hydrogen atom or a methyl group. * Represents a bonding position.
- R 4 , R 5 and R 6 are each independently a hydrogen atom or a methyl group. * Represents a bonding position.
- R 2 , R 3 and R 6 are each independently a hydrogen atom or a methyl group. * Represents a bonding position.
- R 2 , R 5 and R 6 are each independently a hydrogen atom or a methyl group. * Represents a bonding position.
- R 4 , R 5 and R 6 are each independently a hydrogen atom or a methyl group. * Represents a bonding position.
- the hindered phenol compound represented by the formula X 1 (OH) k is 1,3,5-tris (2,6-dimethyl-3-hydroxy-4-tert-butylbenzyl) isocyanuric acid, bis -3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionic acid triethylene glycol, 3,9-bis [2- ⁇ 3- (3-tert-butyl-4-hydroxy-5-methyl Phenyl) propionyloxy ⁇ -1,1-dimethylethyl] -2,4,8,10-tetraoxaspiro [5.5] undecene and 4,4′-butylidenebis (6-tert-butyl-3-
- the hindered phenol compound is a hindered phenol compound represented by the formula X 1 (OH) k , and has a hindered phenol group represented by the following formula (12) or formula (13).
- R 7 is an alkyl group having 1 to 4 carbon atoms.
- R 7 is an alkyl group having 1 to 4 carbon atoms.
- the hindered phenol compound is selected from the group consisting of a paracresol / dicyclopentadiene copolymer, a divinylbenzene / paracresol copolymer, and a paracresol / dicyclopentadiene / isobutene copolymer.
- a diol compound represented by the following formula (2) is reacted with an aromatic diisocyanate compound represented by the following formula (3) in an excess molar amount with respect to the diol compound, and the following formula (4)
- the isocyanate group of the urethane prepolymer represented by the formula (5) is reacted with the phenol group of the hindered phenol compound represented by the following formula (5) in an excess equivalent to the isocyanate group of the urethane prepolymer, [1]
- the method for producing an antioxidant according to any one of [6].
- Y 1 is a residue of diol, and a plurality of Y 1 may be the same or different.
- R 1 is a residue of an aromatic diisocyanate, and a plurality of R 1 may be the same or different.
- m is an integer of 1 or more.
- X 1 is a residue of a hindered phenolic compound having k hindered phenolic hydroxyl groups, OH in the formula (5) is a hindered phenolic hydroxyl group, and k is an integer of 2 or more.
- a polyurethane elastic fiber comprising the antioxidant according to any one of [1] to [6] and a polyurethane polymer.
- polyurethane elastic fiber according to [8] or [9], which is used in inner, outer, leg, sportswear, jeans, swimwear, or diaper rubber yarn products.
- the antioxidant of the present invention contains a polyurethane compound represented by formula (1) having a structure in which the isocyanate groups at both ends of the polyurethane having isocyanate groups at both ends are bonded to the hindered phenol compound. It has excellent affinity with the polyurethane polymer that is the main component of the elastic fiber, and hardly causes scum (that is, yarn residue). Excellent spinning stability, excellent heat resistance, acid resistance, and alkali resistance, and excellent performance stability.
- the antioxidant of the present invention has a relatively large number average molecular weight, it is difficult to be extracted into a dry cleaning solvent, and even when added in a small amount, it can be expected to function effectively as an antioxidant. Even after the cleaning treatment, it is possible to provide a polyurethane elastic fiber having a high strength retention after the light resistance test, excellent coloration durability, and little heat resistance degradation.
- the example of the IR measurement result in the case of manufacture of the antioxidant which concerns on this invention is shown.
- the example of the GPC chromatogram in the case of manufacture of the antioxidant which concerns on this invention is shown.
- the example of the GPC chromatogram of the antioxidant which concerns on this invention is shown.
- the TGA chart after removing the DMAc by drying the antioxidant concerning this invention under reduced pressure is shown.
- the example of the GPC chromatogram of the antioxidant which concerns on this invention is shown.
- the antioxidant of this invention contains the polyurethane compound represented by Formula (1).
- Y 1 is a residue of diol, and a plurality of Y 1 may be the same or different.
- R 1 is a residue of an aromatic diisocyanate, and a plurality of R 1 may be the same or different.
- X 1 is a residue of a hindered phenol compound having k or more hindered phenolic hydroxyl groups, and a plurality of X 1 may be the same or different.
- m is an integer of 1 or more
- n is an integer of 1 or more
- k is an integer of 2 or more.
- Y 1 is a residue of a diol represented by HOY 1 OH. Both OH groups of “HOY 1 OH” are alcoholic hydroxyl groups.
- the diol represented by HOY 1 OH is not limited. Low molecular polyols having a molecular weight of less than 200, such as ethylene glycol, propylene glycol, 1,3-propanediol, 1,4-butanediol, and the like, but polyols having a number average molecular weight of 200 to 4000 are preferred, and number average molecular weights of 400 to 3, A polyol having a number average molecular weight of 600 to 2,000 is particularly preferred.
- the polymer polyol includes various diols consisting of substantially linear homo- or copolymers, such as polyester diol, polyether diol, polylactone diol, polyester amide diol, polyacryl diol, polythioester diol, and polythioether diol. , Polyhydrocarbon diol, polycarbonate diol, polysiloxane diol, polyurethane diol, a mixture thereof or a copolymer thereof.
- Polyester diols include adipate polyester diols by condensation dehydration reaction of dibasic acids such as adipic acid and phthalic acid and glycols such as ethylene glycol and 1,4-butanediol, and polycaprolactone by ring-opening polymerization of ⁇ -caprolactone. Diol etc. are mentioned.
- Polyether diols include polyoxyethylene glycol, polyoxypropylene glycol, polytetramethylene ether glycol, polyoxypentamethylene glycol, copolymer polyether glycol consisting of tetramethylene group and 2,2-dimethylpropylene group, tetramethylene group And a copolymerized polyether glycol consisting of 2-methyltetramethylene groups or a mixture thereof.
- R 1 is an aromatic diisocyanate residue represented by OCNR 1 NCO.
- aromatic diisocyanates represented by OCNR 1 NCO 4,4′-diphenylmethane diisocyanate (MDI), 2,4′-diphenylmethane diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, p- Phenylene diisocyanate, 1,5-naphthalene diisocyanate, m-xylylene diisocyanate, p-xylylene diisocyanate, ⁇ , ⁇ , ⁇ ′, ⁇ ′-tetramethyl-xylylene diisocyanate, 4,4′-diphenyl ether diisocyanate, or A mixture thereof or a copolymer thereof may be used.
- MDI 4,4′-diphenylmethane diisocyanate
- 2,4′-diphenylmethane diisocyanate 2,4′-dip
- X 1 is a residue of a hindered phenol compound having k or more hindered phenolic hydroxyl groups, and k is an integer of 2 or more, may be 2, and is preferably 3, preferably 4 or more It may be. All the k OH groups of the formula “X 1 (OH) k ” are hindered phenolic hydroxyl groups.
- the hindered phenol compound represented by the formula “X 1 (OH) k ” is not limited, but a hindered phenol compound generally sold as a hindered phenol antioxidant can be used.
- the hindered phenol compound represented by the formula “X 1 (OH) k ” preferably has a hindered phenol group represented by any one of the formulas (6) to (11).
- R 2 , R 3 and R 6 are each independently a hydrogen atom or a methyl group. * Represents a bonding position.
- R 2 , R 5 and R 6 are each independently a hydrogen atom or a methyl group. * Represents a bonding position.
- R 4 , R 5 and R 6 are each independently a hydrogen atom or a methyl group. * Represents a bonding position.
- R 2 , R 3 and R 6 are each independently a hydrogen atom or a methyl group. * Represents a bonding position.
- R 2 , R 5 and R 6 are each independently a hydrogen atom or a methyl group. * Represents a bonding position.
- R 4 , R 5 and R 6 are each independently a hydrogen atom or a methyl group. * Represents a bonding position.
- Examples of the hindered phenol compound represented by the formula “X 1 (OH) k ” having a hindered phenol group represented by any one of the formulas (6) to (11) include 1,3 , 5-Tris (2,6-dimethyl-3-hydroxy-4-tert-butylbenzyl) isocyanuric acid (Songwon Industrial, trade name Songnox 1790), bis-3- (3-tert-butyl-4-hydroxy -5-methylphenyl) propionic acid triethylene glycol (Songwon Industrial, trade name Songnox 2450), 3,9-bis [2- ⁇ 3- (3-tert-butyl-4-hydroxy-5-methylphenyl) Propionyloxy ⁇ -1,1-dimethylethyl] -2,4,8,10-tetraoxaspiro [5.5] un Decene (manufactured by ADEKA, product name Adekastab (registered trademark) AO-80), 4,4′-butylidene-bis (6-tert-but
- the hindered phenol compound represented by the formula “X 1 (OH) k ” may be a polymer having a hindered phenol group represented by the formula (12) or the formula (13) in the polymer. Good.
- R 7 is an alkyl group having 1 to 4 carbon atoms.
- R 7 is an alkyl group having 1 to 4 carbon atoms.
- Examples of the hindered phenol compound represented by the formula “X 1 (OH) k ” having a hindered phenol group represented by the formula (12) or the formula (13) include paracresol dicyclo Examples thereof include a pentadiene copolymer, a divinylbenzene / paracresol copolymer, and a paracresol / dicyclopentadiene / isobutene copolymer.
- the number average molecular weight of the polyurethane compound represented by the formula (1) is preferably 8,000 to 100,000, more preferably 10,000 to 80,000, and 15,000 to 50,000. It is particularly preferred.
- the content of hindered phenolic OH groups per solid content of the antioxidant containing the polyurethane compound represented by formula (1) is preferably 1 ⁇ 10 ⁇ 4 mol / g or more, and 2 ⁇ 10 ⁇ 2. more preferably 4 mol / g or more, particularly preferably 4 ⁇ 10 -4 mol / g or more.
- the total amount of OH groups (A) of the antioxidant is 0.10 ⁇ 10 ⁇ 3 to 3.00 ⁇ 10 ⁇ 3 mol / g. Is preferably 0.30 ⁇ 10 ⁇ 3 to 2.00 ⁇ 10 ⁇ 3 mol / g, more preferably 0.50 ⁇ 10 ⁇ 3 to 1.50 ⁇ 10 ⁇ 3 mol / g. Particularly preferred.
- the OH group amount (B) excluding the OH group amount of the unreacted raw material phenol compound is 0.10 ⁇ 10 ⁇ 3 to 1.80 ⁇ 10 ⁇ 3 mol / g. It is preferably 0.30 ⁇ 10 ⁇ 3 to 1.60 ⁇ 10 ⁇ 3 mol / g, more preferably 0.50 ⁇ 10 ⁇ 3 to 1.40 ⁇ 10 ⁇ 3 mol / g. Is particularly preferred.
- the amount of OH groups (C) of the polyurethane compound corresponding to m ⁇ 1 and n ⁇ 1 in the formula (1) is 0.10 ⁇ 10 ⁇ 3 to 1.80 ⁇ 10 ⁇ . 3 mol / g is preferable, 0.20 ⁇ 10 ⁇ 3 to 1.60 ⁇ 10 ⁇ 3 mol / g is more preferable, and 0.30 ⁇ 10 ⁇ 3 to 1.40 ⁇ 10 ⁇ 3. Particularly preferred is mol / g.
- the ratio of the amount of OH groups (B) to the amount of OH groups (A) in the antioxidant of the present invention is 1 or less, but it is easier to produce when the unreacted raw material hindered phenol compound is included, and as an antioxidant. Is preferably less than 1, more preferably 0.99 or less, still more preferably 0.95 or less, in that both washing resistance and dry cleaning resistance can be combined. .90 or less is particularly preferable.
- the ratio of the OH group amount (B) to the OH group amount (A) of the antioxidant of the present invention is preferably 0.50 or more, more preferably 0.60 or more, and 0.70 or more. More preferably, it is more preferably 0.75 or more.
- the ratio of the OH group amount (C) to the OH group amount (A) of the antioxidant of the present invention is preferably 0.45 or more, more preferably 0.50 or more, and 0.55 or more. More preferably, it is particularly preferably 0.60 or more.
- the diol compound represented by the formula (2) and the diol compound represented by the formula (2) are reacted with an excess amount of the aromatic diisocyanate compound represented by the formula (3) to obtain the formula
- the urethane prepolymer (PUPP) represented by (4) can be obtained.
- As the excess mole an aromatic diisocyanate compound having an excess mole of 1.01 to 2.1 times that of the diol can be used.
- the terminal group of the urethane prepolymer represented by the formula (4) becomes a hydroxyl group and does not react with the hindered phenol compound.
- the aromatic diisocyanate compound When it is more than 2.1 times, the aromatic diisocyanate compound remains unreacted and remains, and the reaction product easily gels due to a side reaction of the isocyanate group.
- the preferred excess is 1.2 to 1.9 times excess mole, more preferably 1.3 to 1.8 times excess mole.
- the smaller the excess mole the higher the molecular weight of the urethane prepolymer represented by the formula (4) and the polyurethane compound represented by the formula (1) finally obtained.
- the larger the excess molar amount the lower the molecular weight. It becomes a thing.
- the molecular weight of the urethane prepolymer represented by the formula (4) should also be adjusted by the molecular weight of the diol compound represented by the formula (2) and the aromatic diisocyanate compound represented by the formula (3). Can do.
- the number average molecular weight of the urethane prepolymer (PUPP) represented by the formula (4) is preferably 6,000 to 80,000, more preferably 8,000 to 60,000. It is particularly preferred that it is ⁇ 40,000.
- the antioxidant containing the polyurethane compound represented by the formula (1) is based on the isocyanate group of the urethane prepolymer (PUPP) urethane prepolymer represented by the formula (4) and the isocyanate group of the urethane prepolymer.
- An excess equivalent amount of the hindered phenol compound represented by formula (5) and the hindered phenol compound represented by formula (5) and the polyurethane compound represented by formula (1) Can be obtained as a mixture of
- the polyurethane compound represented by the formula (1) has a relatively high molecular weight, whereas the hindered phenol compound represented by the formula (5) has a relatively low molecular weight.
- the hindered phenol compound represented by formula (5) can be removed to obtain an antioxidant. Since the dartphenol compound itself also has a role as an antioxidant, it can be used as an antioxidant as it is without being removed.
- the antioxidant containing the polyurethane compound represented by the formula (1) may contain a reaction solvent.
- amide polar solvents such as dimethylformamide, dimethyl sulfoxide, dimethylacetamide and the like can be used. Preferred is dimethylacetamide (DMAc).
- DMAc dimethylacetamide
- a solvent such as dimethylacetamide (DMAc) may be contained during spinning of the polyurethane elastic fiber and can be removed during the spinning process.
- Alicyclic or aliphatic diisocyanate compounds are less reactive with phenolic compounds having steric hindrance, and are less reactive than aromatic diisocyanate compounds, even when organometallic catalysts are used. Since it takes a long time, gelation is likely to occur as the side reaction of the isocyanate group proceeds. On the other hand, the reaction between the diol compound represented by the formula (2) and the aromatic diisocyanate compound is more reactive than the case where the alicyclic or aliphatic diisocyanate compound is used. Therefore, the reaction proceeds quickly without catalyst.
- the reaction time can be shortened by using a known amine catalyst or organometallic catalyst effective for promoting the urethanization reaction.
- the antioxidant obtained using the catalyst is easily colored, and the isocyanate group easily undergoes a side reaction and is easily gelled.
- the polyurethane elastic fiber of the present invention contains the above-mentioned antioxidant and a polyurethane polymer.
- the content ratio of the solid content of the antioxidant to the polyurethane polymer is preferably 0.01 to 20% by mass, more preferably 0.1 to 15% by mass, and 0.5 to 10%. It is particularly preferable that the content is% by mass.
- the polyurethane polymer refers to a polymer other than the polyurethane compound represented by the formula (1) among the polymers having a urethane group constituting the polyurethane elastic fiber.
- the polyurethane polymer may be a polyurethane urea polymer used for general polyurethane elastic fibers, or may be a polymer composed only of polyurethane.
- a known polyurethane reaction technique such as a prepolymer method or a one-shot method can be used.
- a high-molecular polyol and diisocyanate are reacted under an excess of diisocyanate to synthesize a urethane prepolymer having an isocyanate group at the end, and then this urethane prepolymer is subjected to a chain extension reaction with a low-molecular diol to produce a polyurethane compound.
- the polyurethane urea polymer can be obtained, for example, by reacting a polymer polyol, diisocyanate, diamine, and a terminal stopper having a monofunctional active hydrogen atom.
- Examples of the polymer polyol used for the production of the polyurethane polymer include the polymer polyols enumerated as those used for the production of the above-mentioned antioxidants, which may be the same or different. From the viewpoint, the same kind of polymer polyol is preferable.
- diisocyanate used in the production of the polyurethane polymer examples include aromatic diisocyanate compounds enumerated as those used in the production of the above-mentioned antioxidants, and in addition, aliphatic or alicyclic diisocyanate compounds. May be.
- the polyurethane polymer preferably has so-called soft segments and hard segments.
- Soft segments are relatively long-chain segments such as polyethers, polyesters, polyether esters, etc.
- hard segments are relatively short-chain segments derived from the reaction of isocyanates with diamine or diol chain extenders.
- Such long-chain polymers can usually be prepared by capping a hydroxyl-terminated soft segment precursor with an organic diisocyanate to form a prepolymer and then chain-extending the prepolymer with a diamine or diol.
- diamine used for chain extension of the prepolymer known diamines can be used, and examples thereof include ethylenediamine, 1,2-propylenediamine, 1,3-cyclohexanediamine, 1,4-cyclohexanediamine, These may be used alone or in combination of two or more.
- the polyurethane elastic fiber of the present invention can be produced by spinning a raw material solution containing an antioxidant containing a polyurethane compound represented by the formula (1) and the above polyurethane polymer.
- the type of polyol used for the production of each of the polyurethane compounds represented by the formula (1) contained in the polyurethane polymer and the antioxidant is a combination of a plurality of types of polyols.
- the same is preferable from the viewpoint of affinity. That is, when the polyol used in the production of the polyurethane polymer is a polyester diol, the polyol used in the production of the polyurethane compound represented by the formula (1) contained in the antioxidant is preferably a polyester diol.
- the polyol used in the production of the coalescence is a polyether diol
- the polyol used in the production of the polyurethane compound represented by the formula (1) contained in the antioxidant is preferably a polyether diol.
- the polyol used in the production is a polycarbonate diol
- the polyol used in the production of the polyurethane compound represented by the formula (1) contained in the antioxidant is preferably a polycarbonate diol
- the polyol used in the production of the polyurethane polymer is a polylactone diols.
- the type of diisocyanate used in each production of the polyurethane compound represented by the formula (1) contained in the polyurethane polymer and the antioxidant is the same aromatic diisocyanate.
- Examples of the solvent used when spinning the polyurethane elastic fiber using a long-chain polyurethane polymer as a raw material include dimethylacetamide (DMAc), dimethylformamide, dimethylsulfoxide, N-methylpyrrolidone, and the like, but DMAc is preferable. It is suitable for the dry spinning method using a solvent that the concentration of the long-chain polyurethane polymer is 25 to 50% by mass, particularly 30 to 40% by mass, based on the total mass of the raw material solution.
- DMAc dimethylacetamide
- concentration of the long-chain polyurethane polymer is 25 to 50% by mass, particularly 30 to 40% by mass, based on the total mass of the raw material solution.
- the polyurethane elastic fiber is spun by a melt spinning method, a dry spinning method or a wet spinning method, and when a diamine is used as the chain extender, the polyurethane elastic fiber is a dry spinning method. Is spun.
- the spinning method is not particularly limited, but a dry spinning method using a solvent is preferable.
- known organic or inorganic compound heat stabilizers useful for polyurethane polymers antioxidants, UV inhibitors, yellowing inhibitors, thermal discoloration inhibitors and pool water such as hydrotalcite, huntite, zinc oxide, etc.
- a polyurethane stabilizer or the like for the sterilizing chlorine agent may be added.
- the polyurethaneurea elastic fiber of the present invention may contain various stabilizers, pigments and the like as required as long as the effects of the present invention are not impaired.
- benzotriazole and benzophenone drugs such as “Chinubin (registered trademark)” manufactured by Ciba Geigy
- phosphorous drugs such as “Sumilyzer (registered trademark)” P-16 manufactured by Sumitomo Chemical Co., Ltd.
- various hindered amines Drugs inorganic pigments such as titanium oxide and carbon black, fluorine resin powder or silicone resin powder, metal soaps such as magnesium stearate, and bactericides and deodorants containing silver, zinc, and these compounds
- lubricants such as silicone and mineral oil, various antistatic agents such as barium sulfate, cerium oxide, betaine and phosphoric acid are added, and they may be present by reacting with a polymer.
- nitric oxide scavengers such as HN-150 manufactured by Nippon Finechem Co., Ltd.
- HN-150 manufactured by Nippon Finechem Co., Ltd.
- a thermal oxidation stabilizer and a light stabilizer for example, a light stabilizer such as “SUMISORB (registered trademark)” 300 # 622 manufactured by Sumitomo Chemical Co., Ltd.
- the polyurethane polymer composition thus obtained can be formed into a fiber by a conventionally known dry spinning method.
- a known oil agent for polyurethane elastic fibers may be further adhered as an oil agent from the outside using an oiling device during spinning.
- the oil component used here is polyester-modified silicone, polyether-modified silicone, polyamino-modified silicone, polyorganosiloxane, mineral oil, talc, silica, colloidal alumina and other mineral fine particles, magnesium stearate
- various fatty acid metal salt powders such as calcium stearate, higher aliphatic carboxylic acids, higher aliphatic alcohols, waxes that are solid at room temperature such as paraffin polyethylene, and the like may be used in combination.
- the polyurethane elastic fiber obtained in this way may be used as a bare thread as it is in practice, and other fibers such as polyamide fiber, wool, cotton, regenerated fiber, polyester fiber and the like are conventionally known. It can also be used as a coated elastic fiber by coating with a fiber. In particular, it is preferably used in combination with a fiber material selected from the group consisting of nylon, ester, acrylic, natural fiber and cellulose derivative.
- part represents “part by mass”.
- Thermogravimetric (TGA) measurement conditions Thermogravimetric (TGA) analysis was performed under the following measurement conditions. Equipment: TGA-50 manufactured by Shimadzu Corporation Sample amount: 10.7mg Temperature condition: start temperature 25 ° C. ⁇ 10 ° C./1 min: temperature increase rate ⁇ end temperature 500 ° C.
- the OH group amount (A) is the theoretical OH group amount determined from the charging ratio of each raw material.
- the OH group amount (A) was calculated from the following formula.
- OH group amount (A) (mol / g) (feed ratio of raw diol compound (X1) ⁇ molecular weight of raw diol compound ⁇ 2) + ((feed ratio of raw phenol compound (X2) ⁇ molecular weight of raw phenol compound ⁇ ) Number of OH groups per molecule of raw material phenol compound)-(Feed ratio of raw material diisocyanate compound (X3) ⁇ Molecular weight of raw material diisocyanate compound ⁇ 2)
- the amount of OH groups (B) is the amount of OH groups excluding the amount of OH groups of the unreacted raw material phenol compound among the antioxidants.
- the calculation method of OH group amount (B) is as follows. A calibration curve was prepared in advance from the GPC chromatogram of the starting phenol compound, and the amount of reacted phenol compound (b ′) and the unreacted phenol were determined from the GPC chromatogram of the antioxidant after completion of the reaction with the prepolymer. The amount of compound (b ′′) was calculated, and the proportion (X′2) of the reacted phenol compound was calculated.
- the OH group amount (B) is the following formula instead of the proportion (X′2) of the reacted phenol compound in the raw phenol compound charge ratio (X2) in the calculation formula of the OH group amount (A).
- Example 1 By reacting 233 g of polytetramethylene glycol having a number average molecular weight of 1,850 and 56 g of 4,4′-diphenylmethane diisocyanate in a dry nitrogen atmosphere at 70 ° C. for 3 hours with stirring, a urethane prepolymer having isocyanate groups at both ends is obtained. A polymer (PUPP) was obtained. IR of this urethane prepolymer (PUPP) is shown in FIG. 1 (a), and a GPC chromatogram is shown in FIG. 2 (a).
- the urethane prepolymer had a weight average molecular weight (Mw) of 30,151 and a number average molecular weight (Mn) of 22,846.
- Mw weight average molecular weight
- Mn number average molecular weight
- the small peak with Rt (retention time) 21.68 min is unreacted 4,4′-diphenylmethane diisocyanate.
- the GPC chromatogram of the urethane prepolymer (PUPP) is shown in FIG. 2 (a), and the GPC chromatogram after the reaction for 2 hours is shown in FIG. 2 (b).
- the weight average molecular weight (Mw) of the polyurethane compound part excluding the part of Songnox 1790 is 66,670 and the number average molecular weight (Mn) is 42,880, which corresponds to m ⁇ 1 and n ⁇ 1 in the above formula (1).
- the polyurethane compound portion had a weight average molecular weight (Mw) of 68,660 and a number average molecular weight (Mn) of 48,300.
- FIG. 3 is a GPC chromatogram showing the evaluation part of the average molecular weight to be clear.
- the obtained polyurethane-based hindered phenol antioxidant (AO-1) is a polyurethane compound represented by the above formula (1), 1,3,5-tris (4-tert-butyl-3-hydroxy-2, 6-dimethylbenzyl) isocyanuric acid and DMAc as solvent.
- FIG. 4 shows a TGA chart after the polyurethane antioxidant (AO-1) was dried under reduced pressure to remove DMAc. From this TGA, it can be seen that the solid component of this polyurethane-based antioxidant (AO-1) is heat-stable up to around 300 ° C. and stable to heat even in the dry spinning process of polyurethane elastic fibers.
- An IR chart of this polyurethane antioxidant (AO-1) is shown in FIG. 1 (b) in comparison with the urethane prepolymer (PUPP) (a).
- Table 2 shows the number average molecular weight, OH group amount (A), OH group amount (B), and OH group amount (C).
- a polyurethane-based hinder was prepared in the same manner as in Example 1 except that a solution dissolved in 466 g of dimethylacetamide (DMAc) was added to the urethane prepolymer (PUPP) cooled at room temperature so as to become a weight% DMAc solution.
- DMAc dimethylacetamide
- a dophenol antioxidant (AO2-1) was produced. This solution was heated at the same temperature as in Example 1 and the disappearance of the isocyanate group was confirmed by IR, and then cooled at room temperature.
- the weight average molecular weight (Mw) of the polyurethane compound part excluding the part of Songnox 2450 is 33,450 and the number average molecular weight (Mn) is 26,030, which corresponds to m ⁇ 1 and n ⁇ 1 in the above formula (1).
- the polyurethane compound part had a weight average molecular weight (Mw) of 36,880 and a number average molecular weight (Mn) of 31,270.
- FIG. 5 is a GPC chromatogram showing the evaluation part of the average molecular weight to be clear.
- Example 3 Comparative Example 1
- the OH group amount (A) of the polyurethane-based hindered phenol antioxidant (AO2-2) containing polytetramethylene glycol of Example 3 is the OH group amount (A) of Example 2, and the OH group amount of Comparative Example 1 (A), the amount of OH groups of the starting material bis-3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionic acid triethylene glycol, and the GPC chromatogram of FIG. 5 (AO 2 -2) and (AO2-3) were calculated from the area ratio.
- the amount of OH groups (B) and the amount of OH groups (C) in Example 3 were shown as the same values as the amount of OH groups (A).
- Example 4 to 11 Polyurethane-based hindered phenol antioxidants (AO-3 to AO-10) using combinations of diols and diisocyanates listed in Table 1 and phenolic compounds (hindered phenol antioxidants) in the same manner as in Example 1. Manufactured. The abbreviations in Table 1 are shown in Table 3. Table 2 shows the number average molecular weight and the OH group amount.
- Example 12 A solid content of 3.0 parts by weight of the polyurethane hindered phenol antioxidant (AO-1) synthesized in Example 1 was uniformly stirred and mixed with 100 parts by weight of the solid content of the polyurethane urea stock solution (A). The stock solution for spinning thus obtained was defoamed, and then the DMAc solvent was evaporated by extruding into hot air at about 230 ° C. from the pores of 16 spinnerets (each of which has 4 pores). .
- AO-1 polyurethane hindered phenol antioxidant
- the dried yarn is false twisted, passed through a godet roller, oiled with dimethyl silicon as a main component on an oiling roller, wound onto a paper tube at a speed of 700 m / min, and a 44 dt / 4 filament polyurethane elastic Fiber was obtained.
- Table 4 shows the results of various evaluations using the obtained polyurethane elastic fibers. Various evaluation methods will be described next.
- Grade 5 No adhesion to the razor blade.
- Grade 4 Slightly adhered to the razor blade.
- Third grade Slightly adhered to the razor blade.
- Second grade Slightly larger amount of adhesion to the razor blade.
- First grade A large amount of deposits on the razor blade.
- Thermal cutting seconds The time from cutting of the sample against a hot body at 190 ° C. under 50% elongation to cutting was measured.
- Example 13 A polyurethane elastic fiber was produced in the same manner as in Example 12 using the polyurethane-based hindered phenol antioxidant (AO2-1) produced in Example 2.
- Example 14 A polyurethane elastic fiber was produced in the same manner as in Example 12 using the polyurethane hindered phenol antioxidant of the polymer component (AO2-2) separated in Example 3.
- Example 2 A polyurethane elastic fiber was produced in the same manner as in Example 12 using the polyurethane hindered phenol antioxidant of the low molecular component (AO2-3) separated in Example 3 and Comparative Example 1.
- Example 15 to 22 Polyurethane elastic fibers were produced in the same manner as in Example 1 using the polyurethane hindered phenol antioxidant produced in Examples 4-11.
- Example 7 A polyurethane elastic fiber was produced in the same manner as in the production method of Example 12, except that only the polyurethane urea stock solution was used.
- the polyurethane elastic fiber of the present invention has excellent spinning stability, little scum generation, excellent strength retention after a light resistance test, no coloration due to combustion gas, thermal cutting, even after either washing treatment or dry cleaning treatment It was confirmed that there were few.
- the antioxidant of the present invention can be suitably used as a stabilizer for polyurethane elastic fibers, and the polyurethane elastic fibers of the present invention can be used for inner, outer, legs, sportswear, jeans, swimwear, or diaper rubber. It can be suitably used for yarn products.
- the polyurethane compound contained in the antioxidant of the present invention has a functional group of a phenolic antioxidant at the terminal of the polymer chain, for example, various polymers other than polyurethane such as polyester and polyamide. Application to polymer stabilizers can be expected.
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Abstract
Description
本願は、2016年11月15日に日本に出願された特願2016-222292号に基づき優先権を主張し、その内容をここに援用する。
[1]下記式(1)で表されるポリウレタン化合物を含む酸化防止剤。
R1は芳香族ジイソシアネートの残基であって、複数のR1は同じであっても異なっていてもよい。
X1はヒンダートフェノール性水酸基をk個以上有するヒンダートフェノール化合物の残基であって、複数のX1は同じであっても異なっていてもよい。
mは1以上の整数であり、nは1以上の整数であり、kは2以上の整数である。)」
本発明の酸化防止剤は、式(1)で表されるポリウレタン化合物を含む。
R1は芳香族ジイソシアネートの残基であって、複数のR1は同じであっても異なっていてもよい。
X1はヒンダートフェノール性水酸基をk個以上有するヒンダートフェノール化合物の残基であって、複数のX1は同じであっても異なっていてもよい。
mは1以上の整数であり、nは1以上の整数であり、kは2以上の整数である。)
本発明の酸化防止剤のOH基量(B)のOH基量(A)に対する割合は、0.50以上であることが好ましく、0.60以上であることがより好ましく、0.70以上であることが更に好ましく、0.75以上であることが特に好ましい。
本発明の酸化防止剤のOH基量(C)のOH基量(A)に対する割合は、0.45以上であることが好ましく、0.50以上であることがより好ましく、0.55以上であることが更に好ましく、0.60以上であることが特に好ましい。
式(2)で表されるジオール化合物と、式(2)で表されるジオール化合物に対して、過剰モル量の式(3)で表される芳香族ジイソシアナート化合物とを反応させ、式(4)で表されるウレタンプレポリマー(PUPP)を得ることができる。
該過剰モルは、ジオールに対して、1.01~2.1倍の過剰モルの芳香族ジイソシアナート化合物を用いることができる。1.0倍より少ないと、式(4)で表されるウレタンプレポリマーの末端基が水酸基になり、ヒンダードフェノール化合物と反応しない。2.1倍より多いと、芳香族ジイソシアネート化合物が未反応で多く残留して、イソシアネート基の副反応により、反応生成物がゲル化しやすい。好ましい過剰量は、1.2~1.9倍過剰モルであり、より好ましくは、1.3~1.8倍過剰モルである。過剰モルが小さい程、式(4)で表されるウレタンプレポリマー、及び、最終的に得られる式(1)で表されるポリウレタン化合物は高分子量になり、過剰モル量が大きい程、低分子量のものになる。また、式(4)で表されるウレタンプレポリマーの分子量は、式(2)で表されるジオール化合物や、式(3)で表される芳香族ジイソシアナート化合物の分子量によっても調節することができる。
本発明のポリウレタン弾性繊維は、上記の酸化防止剤と、ポリウレタン重合体と、を含有する。
この際、更に、公知のポリウレタン弾性繊維用油剤を紡糸時に外部よりオイリング装置を用いて、油剤として付着させてもよい。ここで用いられる油剤成分は、エーテル変性シリコーンの他に、ポリエステル変性シリコーン、ポリエーテル変性シリコーン、ポリアミノ変性シリコーン、ポリオルガノシロキサン、鉱物油、タルク、シリカ、コロイダルアルミナ等の鉱物性微粒子、ステアリン酸マグネシウムおよびステアリン酸カルシウム等の高級脂肪酸金属塩粉末、高級脂肪族カルボン酸、高級脂肪族アルコール、パラフィンポリエチレン等の常温で固体のワックスなど種々のものを組み合わせて使用して良い。
実施例中の赤外線吸収スペクトルの分析は、以下の測定条件にて測定した。
装置:島津製作所製 IRAffinity-IS型
検出器:MIracle 10
試料台:ATRプリズムプレート(ダイヤモンド/ZnSe)
ウレタンプレポリマー(PUPP)、ポリウレタン化合物等の各種ポリマー化合物のGPCの分析は、以下の測定条件にて測定し、ポリスチレン換算の分子量を求めた。
サンプル濃度 :0.1質量%(DMF溶液)
注入量 :50μl
送液ポンプ :島津製作所社製 LC-20AD
カラムオーブン:同上 CT0-20A
検出器 :同上 SPD-M20A
溶離液 :DMF
流量 :1ml/min
カラム温度 :40℃
カラム :昭和電工社製 Shodex(登録商標) GPC KD-804+KD-803
熱重量(TGA)の分析は、以下の測定条件にて測定した。
装置:島津製作所社製 TGA-50
サンプル量:10.7mg
温度条件:開始温度25℃→10℃/1分:昇温速度→終了温度500℃
ウレタンプレポリマーにヒンダートフェノール化合物を反応させて得られる反応物を、分画することなく酸化防止剤としたときの、酸化防止剤のOH基量(A)、OH基量(B)及びOH基量(C)の算出方法は以下の通りである。
OH基量(A)は、各原料の仕込み割合から求めた理論OH基量である。OH基量(A)は次の式から算出した。
OH基量(A)(mol/g) = (原料ジオール化合物の仕込み割合(X1)÷原料ジオール化合物の分子量×2)+((原料フェノール化合物の仕込み割合(X2)÷原料フェノール化合物の分子量×原料フェノール化合物1分子あたりのOH基数)-(原料ジイソシアナネート化合物の仕込み割合(X3)÷原料ジイソシアナネート化合物の分子量×2)
a(g):原料ジオール化合物の反応仕込み量
b(g):原料フェノール化合物の反応仕込み量
c(g):原料ジイソシアナネート化合物の反応仕込み量
X=a+b+c
=原料ジオール化合物の反応仕込み量a(g)+原料フェノール化合物の反応仕込み量b(g)+ジイソシアナネート反応仕込み量c(g)
原料ジオール化合物の仕込み割合(X1)=a÷X
原料フェノール化合物の仕込み割合(X2)=b÷X
原料ジイソシアナネート化合物の仕込み割合(X3)=c÷X
OH基量(B)は、酸化防止剤のうち、未反応の原料フェノール化合物のOH基量を除いたOH基量である。OH基量(B)の算出方法は以下の通りである。
あらかじめ、原料フェノール化合物のGPCクロマトグラムから検量線を作成しておき、プレポリマーとの反応終了後の酸化防止剤のGPCクロマトグラムから、反応したフェノール化合物量(b’)と、未反応のフェノール化合物量(b”)を算出した。また、反応したフェノール化合物の割合(X’2)を算出した。
b’(g):反応したフェノール化合物量
b”(g):未反応のフェノール化合物量
b=b’+b”
反応したフェノール化合物の割合(X’2)=b’÷X
OH基量(B)(mol/g) = (原料ジオール化合物の仕込み割合(X1)÷原料ジオール化合物の分子量×2)+((反応したフェノール化合物の割合(X’2)÷原料フェノール化合物の分子量×原料フェノール化合物1分子あたりのOH基数)-(原料ジイソシアナネート化合物の仕込み割合(X3)÷原料ジイソシアナネート化合物の分子量×2)
OH基量(C)は、酸化防止剤のうち、式(1)において、m≧1、n≧1に相当するポリウレタン化合物のOH基量である。
GPCクロマトグラムから、式(1)において、m≧1、n≧1に相当するポリウレタン化合物の面積比、m=0、n≧1に相当する化合物の面積比、及び、原料フェノール化合物の面積比から、換算して求めた。
(実施例1)
数平均分子量1,850のポリテトラメチレングリコール233gと4,4’-ジフェニルメタンジイソシアネート56gとを乾燥窒素雰囲気下、70℃で3時間、攪拌下で反応させて、両末端にイソシアネート基を有するウレタンプレポリマー(PUPP)を得た。このウレタンプレポリマー(PUPP)のIRを図1の(a)に、GPCクロマトグラムを図2の(a)に示す。ウレタンプレポリマー(PUPP)の重量平均分子量(Mw)は、30,151、数平均分子量(Mn)は22,846であった。Rt(保持時間)=21.68minの小さなピークは、未反応の4,4’-ジフェニルメタンジイソシアネートである。
このポリウレタン系酸化防止剤(AO-1)を減圧乾燥してDMAcを除去した後のTGAチャートを図4に示す。このTGAから、このポリウレタン系酸化防止剤(AO-1)の固形成分は、300℃付近まで熱安定性があり、ポリウレタン弾性繊維の乾式紡糸工程においても熱に対して安定であることが分かる。
このポリウレタン系酸化防止剤(AO-1)のIRチャートを図1の(b)に、ウレタンプレポリマー(PUPP)(a)と対比して示した。表2に数平均分子量及びOH基量(A)、OH基量(B)、OH基量(C)を示す。
1,3,5-トリス(4-tert-ブチル-3-ヒドロキシ-2,6-ジメチルベンジル)イソシアヌル酸(ソンウォン インダストリアル社製、商品名Songnox 1790)の代わりに、ビス-3-(3-tert-ブチル-4-ヒドロキシ-5-メチルフェニル)プロピオン酸トリエチレングリコール(ソンウォン インダストリアル社製、商品名Songnox 2450(前記式(5)において、k=2))177gを、全固形分濃度が、50重量%DMAc溶液になるように、466gのジメチルアセトアミド(DMAc)に溶解した液を、室温冷却したウレタンプレポリマー(PUPP)に加えたことのほかは、実施例1と同様にして、ポリウレタン系ヒンダードフェノール酸化防止剤(AO2-1)を製造した。この液を、実施例1と同様に昇温加熱してイソシアナート基の消滅をIRにて確認後、室温冷却した。Songnox 2450の部分を除くポリウレタン化合物部分の重量平均分子量(Mw)は33,450、数平均分子量(Mn)は26,030であり、前記式(1)で、m≧1、n≧1に相当するポリウレタン化合物部分の重量平均分子量(Mw)は36,880、数平均分子量(Mn)は31,270であった。平均分子量の評価部分が明確になるよう示したGPCクロマトグラムが図5である。
この実施例2のウレタン系フェノール酸化防止剤を、分取HPLC(日本分析工業社製LaboACE LC-5060)を用いて分離し、ポリスチレン換算の数平均分子量で31,270の高分子成分と、RT=19.917(min)の低分子成分と、RT=21.418(min)の原料のSongnox 2450の成分とを得た。
高分子成分は、ポリテトラメチレングリコールの構成単位を含むポリウレタン系ヒンダードフェノール酸化防止剤(AO2-2)(すなわち、前記式(1)において、m≧1、n≧1、k=2のポリウレタン化合物成分)である(実施例3)。
低分子成分は1分子のジフェニルメタンジイソシアネートに対して2分子のビス-3-(3-tert-ブチル-4-ヒドロキシ-5-メチルフェニル)プロピオン酸トリエチレングリコールが反応した化合物(AO2-3)(すなわち、前記式(1)において、m=0、n=1、k=2の化合物、分子量1,423.5)であった(比較例1)。
表2の数平均分子量の欄に、この分子量の値を表記した。OH基量(A)及びOH基量(B)は1.40(2/1,423.5)として示した。
表2に数平均分子量、OH基量(A)、OH基量(B)及びOH基量(C)を示す。
実施例3のポリテトラメチレングリコールを含むポリウレタン系ヒンダードフェノール酸化防止剤(AO2-2)のOH基量(A)は、実施例2のOH基量(A)、比較例1のOH基量(A)、及び原料のビス-3-(3-tert-ブチル-4-ヒドロキシ-5-メチルフェニル)プロピオン酸トリエチレングリコールのOH基量、及び、図5のGPCクロマトグラムから求めた(AO2-2)と(AO2-3)の面積比から、換算して求めた。
実施例3のOH基量(B)及びOH基量(C)は、OH基量(A)と同じ値として示した。
実施例1と同様の方法にて表1に記載のジオール及びジイソシアネート及びフェノール化合物(ヒンダードフェノール酸化防止剤)の組み合わせを用いてポリウレタン系ヒンダードフェノール酸化防止剤(AO-3~AO-10)を製造した。表1中の略号を表3に示す。表2に数平均分子量及びOH基量を示す。
数平均分子量1,800のポリテトラメチレンエーテルジオール400gと4,4’-ジフェニルメタンジイソシアネート91.7gとを乾燥窒素雰囲気下、80℃で3時間、攪拌下で反応させて、両末端にイソシアネート基を有するウレタンプレポリマーを得た。
これを室温に冷却した後、720gのDMAcを加えて溶解し、ウレタンプレポリマー溶液を調整した。一方、エチレンジアミン8.11g及びジエチルアミン1.37gをDMAc390gに溶解し、これを前記ウレタンプレポリマー溶液に室温下で激しく攪拌しながら添加して、粘度360Pa・s(30℃)のポリウレタンウレア原液(A)(濃度31.1重量%)を得た。
(実施例12)
前記のポリウレタンウレア原液(A)の固形分100重量部に対して実施例1で合成したポリウレタン系ヒンダードフェノール酸化防止剤(AO-1)の固形分3.0重量部を均一に攪拌混合して得られた紡糸用原液を脱泡した後、16個の紡糸口金(各々の口金は4個の細孔を有す)の細孔から熱風約230℃中に押しだしてDMAc溶剤を蒸発させた。乾燥された糸条を仮撚りし、ゴッデトローラを経てオイリングローラ上でジメチルシリコンを主成分とする油剤を付与し、毎分700m/分の速度で紙管に巻き取り、44dt/4フィラメントのポリウレタン弾性繊維を得た。
実施例記載の方法に準じて製造した紡糸原液を、上記記載の方法にて30時間紡糸してその糸切れ回数(回/時間)を測定した。糸切れ回数が少ないほど生産性が安定している。
44デシテックス/4フィラメントの弾性繊維を、45℃、65%RHの雰囲気で30日間放置後、紙管を梨地ローラー上に置き、ローラーを回転させながら、ローラー表面速度40m/分で、弾性繊維を送り出す。送り出された弾性繊維を50cm離れた所に設置された同じ径の梨地ローラー上に巻き取る。送り出す弾性糸から25cmの中間地点にかみそり刃を糸角115度になるように設定して立てておき、巻き取るローラー上の表面速度を70m/分設定した。かみそり刃上に弾性繊維を1時間走行させた後、かみそり刃(エヌティー(株)製:NT-L型刃品番L-300)上に付着した白色スカムの量を目視によって1級から5級の判断をした。
4級:かみそり刃にほんのわずか付着あり。
3級:かみそり刃に若干付着あり。
2級:かみそり刃にやや付着量多し。
1級:かみそり刃に多量の付着物あり。
44デシテックスのポリウレタン繊維を50%伸長下で1時間ボイルした後、界面活性剤(花王社製アタック)を1.3g/lの濃度で溶解した洗濯液中で、40℃で40分洗濯した後、水洗し、50℃で15分間乾燥する方法で実施した。
前記洗濯処理後の44デシテックスのポリウレタン繊維を50%伸長下で、50℃のパークレン中に2時間浸漬した後、50℃で15分間乾燥する方法で、パークレン浸漬中の浴比は1:1000とした。
このようにして製造し得られた44デシテックスのポリウレタン弾性繊維について、測定法引張試験機(オリエンテック(株)製:UTM-3-100型)により、20℃、65%RH雰囲気下で、糸試料長5cm幅で1分間1000%の歪み速度で破断強度(すなわち、糸強度)を測定した。得られた破断強度(すなわち、糸強度)を表4に「洗濯処理前の強度(cN)」として示した。
洗濯処理したサンプル、及び洗濯処理及びドライクリーニング処理したサンプルについて、それぞれ、耐光試験を実施し、強度保持率を評価した。耐光試験はフェードメーター(スガ試験機株式会社製)によって、44デシテックスのポリウレタン繊維に25時間紫外線を照射した。その後、引張試験機(オリエンテック(株)製:UTM-3-100型)を用いて、前記条件にて破断強度(すなわち、糸強度)を測定した。ここで、強度保持率は次式により求めた。
強力保持率(%) = 紫外線照射後の糸強度 / 紫外線照射前の糸強度 × 100
洗濯処理、ドライクリーニング処理したサンプルについて、それぞれ、燃焼ガステストを実施し、着色度を評価した。燃焼ガステストは、44デシテックスのポリウレタン繊維についてAATCC-23に従って実施した。燃焼ガス暴露後の変色度を、1級…黄褐色、2級…黄色、3級…淡黄色、4級…わずかに黄色、5級…無着色の5ランクに分けて目視判定した。ただし色相が各級の中間にある場合には上の級から0.5級を減じる方法で表示した。
試料を50%伸長下で190℃の熱体に押し当ててから、切断までの時間を測定した。
実施例2で製造したポリウレタン系ヒンダードフェノール酸化防止剤(AO2-1)を用いて実施例12と同様の方法でポリウレタン弾性繊維を製造した。
実施例3で分離した高分子成分(AO2-2)のポリウレタン系ヒンダードフェノール酸化防止剤を用いて実施例12と同様の方法でポリウレタン弾性繊維を製造した。
実施例3、比較例1で分離した低分子成分(AO2-3)のポリウレタン系ヒンダードフェノール酸化防止剤を用いて実施例12と同様の方法でポリウレタン弾性繊維を製造した。
実施例4~11で製造したポリウレタン系ヒンダードフェノール酸化防止剤を用いて実施例1と同様の方法でポリウレタン弾性繊維を製造した。
1,3,5-トリス(4-tert-ブチル-3-ヒドロキシ-2,6-ジメチルベンジル)イソシアヌル酸(商品名Songnox 1790)380gにDMAc500gを加え、40℃で1時間攪拌し溶解した。次に、イソホロンジイソシアネート120gを加え70℃で20時間反応させた。20時間後にIRスペクトルを測定しイソシアネートの消費率を確認したところ、消費率13%とほとんど反応していなかったことから紡糸の評価は行っていない。
比較例3と同様の方法でイソホロンジイソシアネートを加える際に触媒であるジ-n-ブチルスズジラウレート0.1gを加え、70℃で2時間反応させた。2時間後にIRスペクトルを測定しイソシアネートの消費率を確認したところ、消費率28%とほとんど反応していなかったことから紡糸の評価は行っていない。
特公昭62-43480号公報の製造例に記載の方法を参考にして、100重量部の1,3,5-トリス(4-tert-ブチル-3-ヒドロキシ-2,6-ジメチルベンジル)イソシアヌル酸(商品名Songnox1790)と31.76重量部のイソホロンジイソシアネートとの反応物を合成した。この反応物を用いて実施例12と同様の方法でポリウレタン弾性繊維を製造した。
特公昭62-43480号公報の実施例5に記載の方法に従って、1,4-ブタンジオールと、メチレンビス(4-シクロヘキシルイソシアネート)と、1,3,5-トリス(4-tert-ブチル-3-ヒドロキシ-2,6-ジメチルベンジル)イソシアヌル酸(商品名Songnox1790)との反応物を合成した。この反応物を用いて実施例12と同様の方法でポリウレタン弾性繊維を製造した。
前記のポリウレタンウレア原液のみを用いたことの他は実施例12の製造法と同様にしてポリウレタン弾性繊維を製造した。
特公平5-24246号公報の第3頁カラム6に記載の方法に従って、ジシクロペンタジエン1モルに対して1.1モルのp-クレゾールを加え、両者の固形分濃度に対して3重量部%のBF3(CH2CH5)2Oを加えて90℃で反応させた後、トルエン溶媒で30%の溶液に希釈し、50℃にてイソブチレンガスを吹き込んで反応させ、トルエンを留去して、数平均分子量(Mn)が2,450のp-クレゾール・ジビニルベンゼン・イソブチレン反応物の固形物を得た。これを、ポリウレタン重合体の固形物に対して3重量%加えて、実施例12と同様な方法でポリウレタン弾性繊維を製造した。
前記のポリウレタンウレア原液の固形分に対して3重量%の1,3,5-トリス(4-tert-ブチル-3-ヒドロキシ-2,6-ジメチルベンジル)イソシアヌル酸(商品名Songnox1790)を加えて溶解し、実施例12と同様の方法でポリウレタン弾性繊維を製造した。
Claims (10)
- 前記式(1)で表されるポリウレタン化合物の数平均分子量が8000~100,000である、請求項1に記載の酸化防止剤。
- 前記ヒンダートフェノール化合物が、式X1(OH)kで表されるヒンダートフェノール化合物であって、下記式(6)~式(11)のいずれかで表されるヒンダートフェノール基を有する、請求項1又は2に記載の酸化防止剤。
- 前記式X1(OH)kで表されるヒンダートフェノール化合物が、1,3,5-トリス(2,6-ジメチル-3-ヒドロキシ-4-tert-ブチルベンジル)イソシアヌル酸、ビス-3-(3-tert-ブチル-4-ヒドロキシ-5-メチルフェニル)プロピオン酸トリエチレングリコール、3,9-ビス[2-{3-(3-tert-ブチル-4-ヒドロキシ-5-メチルフェニル)プロピオニロキシ}-1,1-ジメチルエチル]-2,4,8,10-テトラオキサスピロ[5.5]ウンデセン、及び、4,4’-ブチリデンビス(6-tert-ブチル-3-メチルフェノール)からなる群より選択される1以上の化合物である、請求項3に記載の酸化防止剤。
- 前記ヒンダートフェノール化合物が、パラクレゾール・ジシクロペンタジエン共重合物、ジビニルベンゼン・パラクレゾール共重合物、及び、パラクレゾール・ジシクロペンタジエン・イソブテン共重合物からなる群より選択される1以上の化合物である、請求項5に記載の酸化防止剤。
- 下記式(2)で表されるジオール化合物と、前記ジオール化合物に対して過剰モル量の下記式(3)で表される芳香族ジイソシアナート化合物とを反応させ、下記式(4)で表されるウレタンプレポリマーのイソシアナート基と、前記ウレタンプレポリマーのイソシアナート基に対して過剰当量の下記式(5)で表されるヒンダートフェノール化合物のフェノール基とを反応させる、請求項1~6のいずれか1項に記載の酸化防止剤の製造方法。
R1は芳香族ジイソシアネートの残基であって、複数のR1は同じであっても異なっていてもよい。mは1以上の整数である。)
- 請求項1~6のいずれか1項に記載の酸化防止剤と、ポリウレタン重合体と、を含有するポリウレタン弾性繊維。
- 前記ポリウレタン重合体に対する、前記酸化防止剤の固形分の含有割合が、0.01~20質量%である、請求項8に記載のポリウレタン弾性繊維。
- インナー、アウター、レッグ、スポーツウェア―、ジーンズ、水着用衣料、又はオムツ用ゴム糸製品に使用される、請求項8又は9に記載のポリウレタン弾性繊維。
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2017
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- 2017-10-10 WO PCT/JP2017/036651 patent/WO2018092469A1/ja active Application Filing
- 2017-10-10 US US16/344,515 patent/US10975240B2/en active Active
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KR102058921B1 (ko) | 2019-12-24 |
US10975240B2 (en) | 2021-04-13 |
JP6464324B2 (ja) | 2019-02-06 |
US20190249005A1 (en) | 2019-08-15 |
CN109923173A (zh) | 2019-06-21 |
KR20190053281A (ko) | 2019-05-17 |
CN109923173B (zh) | 2021-03-09 |
JPWO2018092469A1 (ja) | 2018-11-22 |
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