WO2021261088A1 - 樹脂組成物、光ファイバ及び光ファイバの製造方法 - Google Patents
樹脂組成物、光ファイバ及び光ファイバの製造方法 Download PDFInfo
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- WO2021261088A1 WO2021261088A1 PCT/JP2021/017380 JP2021017380W WO2021261088A1 WO 2021261088 A1 WO2021261088 A1 WO 2021261088A1 JP 2021017380 W JP2021017380 W JP 2021017380W WO 2021261088 A1 WO2021261088 A1 WO 2021261088A1
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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
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7621—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring being toluene diisocyanate including isomer mixtures
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/104—Coating to obtain optical fibres
- C03C25/1065—Multiple coatings
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/28—Macromolecular compounds or prepolymers obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/285—Acrylic resins
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/326—Polyureas; Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/62—Surface treatment of fibres or filaments made from glass, minerals or slags by application of electric or wave energy; by particle radiation or ion implantation
- C03C25/6206—Electromagnetic waves
- C03C25/6226—Ultraviolet
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
- C08F283/008—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00 on to unsaturated polymers
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- C—CHEMISTRY; METALLURGY
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/067—Polyurethanes; Polyureas
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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
- C08G18/16—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
- C08G18/246—Catalysts containing metal compounds of tin tin salts of carboxylic acids containing also tin-carbon bonds
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- 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
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/2815—Monohydroxy compounds
- C08G18/282—Alkanols, cycloalkanols or arylalkanols including terpenealcohols
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- 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
- C08G18/4833—Polyethers containing oxyethylene units
- C08G18/4837—Polyethers containing oxyethylene units and other oxyalkylene units
- C08G18/4845—Polyethers containing oxyethylene units and other oxyalkylene units containing oxypropylene or higher oxyalkylene end 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
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/6715—Unsaturated monofunctional alcohols or amines
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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
- C08G18/80—Masked polyisocyanates
- C08G18/8061—Masked polyisocyanates masked with compounds having only one group containing active hydrogen
- C08G18/8064—Masked polyisocyanates masked with compounds having only one group containing active hydrogen with monohydroxy compounds
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/14—Polyurethanes having carbon-to-carbon unsaturated bonds
- C08L75/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
- C09D175/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02395—Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4402—Optical cables with one single optical waveguide
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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
Definitions
- the present disclosure relates to a resin composition for secondary coating of an optical fiber, an optical fiber and a method for producing the optical fiber.
- the optical fiber is provided with a coating resin layer for protecting the glass fiber which is an optical transmitter.
- the coating resin layer is composed of, for example, two layers, a primary resin layer in contact with the glass fiber and a secondary resin layer formed on the outer layer of the primary resin layer.
- the secondary resin layer is required to have a high Young's modulus in order to enhance microbend resistance, and to have surface slipperiness, scratch resistance, and tack resistance in order to improve the handleability of the optical fiber. ..
- Patent Documents 1 and 2 disclose that the surface slipperiness is improved by forming a resin layer using a resin composition containing a silicone compound. Further, Patent Documents 3 and 4 disclose that the tack prevention property is improved by forming a resin layer using a resin composition containing a specific urethane (meth) acrylate.
- the resin composition for secondary coating of an optical fiber is a resin containing a non-reactive urethane compound having a number average molecular weight of 10,000 or more and 50,000 or less, a photopolymerizable compound, and a photopolymerization initiator.
- the content of the non-reactive urethane compound in the composition is 0.05 parts by mass or more and 5 parts by mass or less based on the total amount of the resin composition, and the non-reactive urethane compound has a number average molecular weight of 8000. It is a reaction product of a polyol having a value of 20000 or less, a diisocyanate, and a compound having active hydrogen.
- FIG. 1 is a schematic cross-sectional view showing an example of an optical fiber according to the present embodiment.
- the slipperiness of the surface of the coated resin layer gradually increases due to external forces such as contact with the guide roller and a screening test (a test in which a tensile load of several kg is applied to the optical fiber to remove low-strength parts in advance). This may worsen and meander when the optical fiber is wound around the bobbin, which may reduce the productivity of the optical fiber.
- the secondary resin layer is required to have excellent surface slipperiness and wear resistance.
- it is required to increase the Young's modulus of the secondary resin layer.
- increasing the Young's modulus of the secondary resin layer causes a decrease in the toughness of the resin layer, and the secondary resin layer is liable to crack when an external force is applied.
- the present disclosure provides a resin composition for a secondary coating of an optical fiber having a high Young's modulus, being able to form a resin layer having excellent toughness, and having excellent surface slipperiness and wear resistance, and an optical fiber having excellent productivity.
- the purpose is to do.
- a resin composition for a secondary coating of an optical fiber having a high Young's modulus, a resin layer having excellent toughness, and excellent surface slipperiness and abrasion resistance, and an optical fiber having excellent productivity. can be provided.
- the resin composition for secondary coating of an optical fiber is a resin containing a non-reactive urethane compound having a number average molecular weight of 10,000 or more and 50,000 or less, a photopolymerizable compound, and a photopolymerization initiator.
- the content of the non-reactive urethane compound in the composition is 0.05 parts by mass or more and 5 parts by mass or less based on the total amount of the resin composition, and the non-reactive urethane compound has a number average molecular weight. It is a reaction product of a polyol of 8,000 or more and 20,000 or less, a diisocyanate, and a compound having active hydrogen.
- Such a resin composition can maintain a high breaking elongation at a high Young's modulus and form a secondary resin layer having excellent surface slipperiness and wear resistance when an external force is applied to the optical fiber. Therefore, the productivity of the optical fiber can be improved.
- the polyol may be a polypropylene polyol because it is easy to adjust the Young's modulus and the elongation at break of the resin layer.
- the compound having active hydrogen may be a monohydric alcohol in order to impart appropriate toughness to the secondary resin layer.
- the photopolymerizable compound is a urethane (meth) acrylate having a number average molecular weight of 500 or more and 6000 or less, based on the total amount of the resin composition, 5 parts by mass or more and 40 mass by mass.
- the urethane (meth) acrylate may be a reaction product of a polyol having a number average molecular weight of 300 or more and 2500 or less, a diisocyanate, and a hydroxyl group-containing (meth) acrylate.
- the photopolymerizable compound may contain bisphenol skeleton-containing (meth) acrylate in an amount of 30 parts by mass or more and 70 parts by mass or less based on the total amount of the resin composition.
- the optical fiber according to one aspect of the present disclosure includes a glass fiber including a core and a clad, a primary resin layer in contact with the glass fiber and covering the glass fiber, and a secondary resin layer covering the primary resin layer.
- the resin layer contains a cured product of the above resin composition.
- Such an optical fiber is excellent in surface slipperiness and wear resistance, and can improve the productivity of the optical fiber.
- the method for producing an optical fiber according to one aspect of the present disclosure includes a coating step of applying the above resin composition to the outer periphery of a glass fiber including a core and a clad, and a coating step of applying ultraviolet rays after the coating step to apply the resin composition. Includes a curing step to cure. This makes it possible to produce an optical fiber having excellent surface slipperiness and wear resistance.
- the resin composition according to the present embodiment contains a non-reactive urethane compound, a photopolymerizable compound, and a photopolymerization initiator.
- non-reactive means having no photopolymerizable group.
- the non-reactive urethane compound according to the present embodiment does not have a photopolymerizable group and has a number average molecular weight (Mn) of 10,000 or more and 50,000 or less (hereinafter, “non-reactive urethane compound (A)). ".) Is included.
- the Mn of the non-reactive urethane compound (A) is preferably 12,000 or more and 45,000 or less, more preferably 14,000 or more and 44,000 or less, and further preferably 16,000 or more and 40,000 or less.
- the Mn of the non-reactive urethane compound (A) is less than 10,000, the slipperiness and abrasion resistance of the surface tend to decrease, and if the Mn exceeds 50,000, the resin composition tends to become cloudy. Further, since the non-reactive urethane compound is not incorporated into the cross-linking, it can bring about a plastic effect on the coating film and improve the elongation at break. It is considered that the hydrogen bond by the urethane group can improve the elongation at break without lowering the Young's modulus of the resin layer.
- the non-reactive urethane compound (A) is a reaction product of a polyol having a Mn of 8,000 or more and 20,000 or less, a diisocyanate, and a compound having active hydrogen.
- the non-reactive urethane compound (A) has a urethane structure based on the reaction of a polyol having Mn of 8000 or more and 20000 or less with diisocyanate, and a non-reactive group based on a compound having active hydrogen bonded to the end of the urethane structure.
- the non-reactive group may be an alkyl group.
- the Mn of the polyol constituting the non-reactive urethane compound (A) is 8000 or more from the viewpoint of improving toughness, may be 9000 or more or 10,000 or more, and is 20000 or less from the viewpoint of increasing Young's modulus. , 19000 or less or 18,000 or less.
- polystyrene resin examples include a polyether polyol, a polyester polyol, a polycaprolactone polyol, a polycarbonate polyol, a polybutadiene polyol, and a bisphenol A / ethylene oxide-added diol.
- polyether polyol examples include polytetramethylene glycol, polyethylene glycol, and polypropylene polyol. Since it is easy to adjust the Young's modulus and the elongation at break of the resin layer, it is preferable to use a polypropylene polyol as the polyol.
- polypropylene polyols examples include polypropylene glucol and polypropylene triol.
- Examples of commercially available products of polyols having Mn of 8000 or more and 20000 or less include AGC Inc.'s PREMINOL S 4013F, PREMINOL S 4318F, PREMINOL S 3011, and PREMINOL 7012.
- the compound having active hydrogen according to the present embodiment is a compound to which a group having active hydrogen such as a hydroxyl group, an amino group and a mercapto group is bonded, and is a compound having no photopolymerizable group such as a (meth) acryloyl group. ..
- Examples of the compound having active hydrogen include alcohol compounds, amine compounds, and thiol compounds.
- a monohydric alcohol is preferable, a monohydric alcohol having 5 or less carbon atoms is more preferable, and a monohydric alcohol having 3 or less carbon atoms is preferable because the secondary resin layer imparts appropriate toughness. More preferred.
- Examples of the monohydric alcohol include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-2-propanol, 1-pentanol, 2-pentanol and 3-pentanol. , 2-Methyl-1-butanol, 3-methyl-1-butanol, 2-methyl-2-butanol, and 3-methyl-2-butanol.
- diisocyanate examples include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, hydrogenated xylylene diisocyanate, 1 , 5-Naphthalenediocyanate, norbornene diisocyanate, 1,5-pentamethylene diisocyanate, tetramethylxylylene diisocyanate, and trimethylhexamethylene diisocyanate.
- a method for synthesizing the non-reactive urethane compound (A) for example, a method of reacting a polyol with a diisocyanate and then reacting with a compound having active hydrogen; a method of reacting a diisocyanate with a compound having active hydrogen and then a polyol. , And a method of simultaneously reacting a polyol, a diisocyanate, and a compound having active hydrogen.
- a method of reacting the hydroxyl group (OH) of the polyol with the isocyanate group (NCO) of the diisocyanate and then reacting with a compound having active hydrogen is preferable, and when a trifunctional or higher functional polyol is used. Is preferably a method in which a compound having active hydrogen is reacted with diisocyanate and then a polyol is reacted.
- non-reactive urethane compound (A) The preparation of the non-reactive urethane compound (A) will be described with reference to specific examples.
- a bifunctional polypropylene polyol polypropylene glycol
- 2,4-tolylene diisocyanate is used as the diisocyanate
- methanol is used as the compound having active hydrogen.
- polypropylene glycol is reacted with 2,4-tolylene diisocyanate to synthesize an NCO-terminated prepolymer.
- the NCO-terminated prepolymer is reacted with methanol to synthesize a non-reactive urethane compound.
- the non-reactive urethane compound (A) can be represented by the following formula (1).
- M represents a residue of methanol
- U represents a urethane bond
- I represents a residue of 2,4-tolylene diisocyanate
- P2 represents a residue of polypropylene glycol
- m is an integer of 1 or more.
- the molar ratio of NCO to OH (NCO / OH) when reacting polypropylene glycol with 2,4-tolylene diisocyanate is preferably 1.5 or more and 2.5 or less, and more preferably 1.8 or more and 2.2 or less. ..
- the molar ratio of methanol to NCO of the NCO-terminated prepolymer is preferably 1.00 or more and 1.15 or less, and more preferably 1.03 or more and 1.10 or less.
- a trifunctional polypropylene polyol (polypropylene triol) is used as the polyol, 2,4-tolylene diisocyanate as the diisocyanate, and methanol as the compound having active hydrogen.
- 2,4-tolylene diisocyanate is reacted with methanol to obtain an isocyanate in which NCO is partially blocked.
- the isocyanate partially blocked with NCO is reacted with polypropylene triol to synthesize a non-reactive urethane compound.
- the non-reactive urethane compound (A) can be represented by the following formula (2).
- M represents a residue of methanol
- U represents a urethane bond
- I represents a residue of 2,4-tolylene diisocyanate
- P3 represents a residue of polypropylene triol
- t is 0, 1 or 2.
- S is an integer of 1 or more and 3 or less
- t + s is 3.
- the molar ratio (NCO / OH) of NCO to methanol of 2,4-tolylene diisocyanate is preferably 1.95 or more and 2.05 or less.
- the molar ratio of OH of polypropylene triol to NCO of partially blocked isocyanate (OH / NCO) is preferably 1.0 or more and 1.5 or less, and more preferably 1.03 or more and 1.3 or less.
- the content of the non-reactive urethane compound (A) is 0.05 part by mass or more based on the total amount (100 parts by mass) of the resin composition, and is 0. .1 part by mass or more is preferable, 0.2 part by mass or more is more preferable, and 0.3 part by mass or more is further preferable.
- the content of the non-reactive urethane compound (A) is 5 parts by mass or less, preferably 4 parts by mass or less, based on the total amount of the resin composition. It is more preferably parts by mass or less, and even more preferably 2 parts by mass or less.
- the photopolymerizable compound according to this embodiment is a urethane (meth) acrylate having a Mn of 500 or more and 6000 or less (hereinafter referred to as “urethane (meth) acrylate (B)”). May include.
- the Mn of the urethane (meth) acrylate (B) is preferably 600 or more and 5500 or less, more preferably 700 or more and 5000 or less, and further preferably 1000 or more and 4000 or less.
- the Mn of the urethane (meth) acrylate (B) is 500 or more, it becomes easy to form a tough secondary resin layer, and when it is 6000 or less, it becomes easy to increase the Young's modulus of the secondary resin layer.
- (meth) acrylate means acrylate or methacrylate corresponding thereto.
- the content of urethane (meth) acrylate (B) is preferably 5 parts by mass or more and 40 parts by mass or less, and more preferably 10 parts by mass or more and 35 parts by mass or less, based on the total amount of the resin composition.
- it is 5 parts by mass or more, it becomes easy to form a tough secondary resin layer, and when it is 40 parts by mass or less, it becomes easy to increase the Young's modulus of the secondary resin layer.
- the urethane (meth) acrylate (B) may be a reaction product of a polyol having a Mn of 300 or more and 2500 or less, a diisocyanate, and a hydroxyl group-containing (meth) acrylate.
- the urethane (meth) acrylate (B) has a urethane structure based on the reaction between a polyol having a Mn of 300 or more and 2500 or less and a diisocyanate, and a (meth) acryloyl group bonded to the end of the urethane structure. preferable.
- Examples of the hydroxyl group-containing (meth) acrylate include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, caprolactone (meth) acrylate, and 2-hydroxy-3-.
- Examples thereof include propandi (meth) acrylate and pentaerythritol tri (meth) acrylate.
- Urethane (meth) acrylate (B) is obtained by reacting a polyol having a Mn of 300 or more and 2500 or less with a diisocyanate at an NCO / OH of 1.5 or more and 6 or less, and then reacting with a hydroxyl group-containing (meth) acrylate. Obtainable. When NCO / OH is in the above range, it becomes easy to form a tough secondary resin layer.
- urethane (meth) acrylate (B) The preparation of urethane (meth) acrylate (B) will be described with reference to specific examples.
- polypropylene glycol is used as the polyol
- 2,4-tolylene diisocyanate is used as the diisocyanate
- 2-hydroxyethyl acrylate is used as the hydroxyl group-containing (meth) acrylate.
- polypropylene glycol is reacted with 2,4-tolylene diisocyanate to synthesize an NCO-terminated prepolymer.
- the NCO-terminated prepolymer is reacted with 2-hydroxyethyl acrylate to synthesize urethane acrylate.
- the urethane acrylate (B) can be represented by the following formula (3).
- A represents a residue of 2-hydroxyethyl acrylate
- U represents a urethane bond
- I represents a residue of 2,4-tolylene diisocyanate
- P represents a residue of polypropylene glycol
- n represents 1 or more. It is an integer.
- the Mn of the polyol constituting the urethane (meth) acrylate (B) is more preferably 350 or more and 2200 or less, further preferably 400 or more and 2000 or less, and further preferably 500 or more and 1500 or less. preferable.
- An organotin compound or an amine compound is used as a catalyst for synthesizing the non-reactive urethane compound (A) and the urethane (meth) acrylate (B).
- the organotin compound include dibutyltin dilaurate, dibutyltin diacetate, dibutyltin malate, dibutyltinbis (2-ethylhexyl mercaptoacetate), dibutyltinbis (isooctyl mercaptoacetate), and dibutyltin oxide. From the viewpoint of easy availability or catalytic performance, it is preferable to use dibutyltin dilaurate or dibutyltin diacetate as the catalyst.
- the photopolymerizable compound according to the present embodiment may contain a bisphenol skeleton-containing (meth) acrylate in order to impart appropriate toughness to the secondary resin layer.
- the (meth) acrylate compound having a bisphenol skeleton include bisphenol A epoxy di (meth) acrylate, bisphenol F epoxy di (meth) acrylate, EO adduct di (meth) acrylate of bisphenol A, and EO adduct di (meth) acrylate of bisphenol F.
- examples thereof include meta) acrylate, bisphenol A PO adduct di (meth) acrylate, and bisphenol F PO adduct di (meth) acrylate.
- the epoxy di (meth) acrylate is a compound obtained by reacting an epoxy compound having two or more glycidyl groups with a compound having a (meth) acryloyl group such as (meth) acrylic acid.
- the bisphenol skeleton-containing (meth) acrylate contains bisphenol A epoxy di (meth) acrylate or bisphenol A EO adduct di (meth) acrylate because it is easy to obtain tough physical properties with a good balance between high Young's modulus and elongation at break. Is preferable.
- the content of the bisphenol skeleton-containing (meth) acrylate may be 30 parts by mass or more, 35 parts by mass or more, or 40 parts by mass or more, and 70 parts by mass or less, 65 parts by mass or less, based on the total amount of the resin composition. Alternatively, it may be 60 parts by mass or less.
- the photopolymerizable compound according to the present embodiment may further contain a photopolymerizable compound (hereinafter referred to as "monomer") other than the urethane (meth) acrylate and the bisphenol skeleton-containing (meth) acrylate.
- a photopolymerizable compound hereinafter referred to as "monomer”
- the monomer a monofunctional monomer having one photopolymerizable ethylenically unsaturated group and a polyfunctional monomer having two or more ethylenically unsaturated groups can be used. Two or more kinds of monomers may be mixed and used.
- Examples of the monofunctional monomer include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, s-butyl (meth) acrylate, and t-butyl (meth) acrylate.
- polyfunctional monomer examples include ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, and trimethylolpropane di (meth) acrylate.
- the photopolymerization initiator it can be appropriately selected from known radical photopolymerization initiators and used.
- the photopolymerization initiator include 1-hydroxycyclohexylphenyl ketone (Omnirad 184, manufactured by IGM Resins), 2,2-dimethoxy-2-phenylacetophenone (Omnirad 651, manufactured by IGM Resins), 2,4,6-.
- Trimethylbenzoyldiphenylphosphine oxide (Omnirad TPO, manufactured by IGM Resins), ethyl (2,4,6-trimethylbenzoyl) -phenylphosphinate (Omnirad TPO-L, manufactured by IGM Resins), 2-benzoyl-2-dimethylamino -4'-Morholinobutyrophenone (Omnirad TPO369, manufactured by IGM Resins), 2-dimethylamino-2- (4-methyl-benzyl) -1- (4-morpholin-4-yl-phenyl) -butane-1-one (Omnirad TPO379, manufactured by IGM Resins), bis (2,4,6-trimethylbenzoyl) phenylphosphinoxide (Omnirad 819, manufactured by IGM Resins), and 2-methyl-1- [4- (methylthio) phenyl]- Examples thereof include 2-morpholinopropane-1-one
- the photopolymerization initiator may be used as a mixture of two or more.
- the photopolymerization initiator preferably contains 2,4,6-trimethylbenzoyldiphenylphosphine oxide because the resin composition is excellent in quick-curing property.
- the content of the photopolymerization initiator is preferably 0.2 parts by mass or more and 5 parts by mass or less, more preferably 0.3 parts by mass or more and 4 parts by mass or less, and 0.4 parts by mass or more, based on the total amount of the resin composition. More preferably, it is 3 parts by mass or less.
- the resin composition according to the present embodiment may further contain a photoacid generator, a leveling agent, an antifoaming agent, an antioxidant and the like.
- a + B - structure may be used onium salt formed by the.
- the photoacid generator include sulfonium salts such as CPI-100P, 110P (manufactured by Sun Appro Co., Ltd.), Omnicat 270, 290 (manufactured by IGM Resins), Omnicat 250 (manufactured by IGM Resins), WPI-113, 116. , 124, 169, 170 (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) and the like.
- the viscosity of the resin composition according to the present embodiment at 25 ° C. is preferably 0.5 Pa ⁇ s or more and 10 Pa ⁇ s or less, preferably 1 Pa ⁇ s or more and 9 Pa ⁇ s or less, from the viewpoint of coatability. Is more preferable.
- FIG. 1 is a schematic cross-sectional view showing an example of an optical fiber according to the present embodiment.
- the optical fiber 10 includes a glass fiber 13 including a core 11 and a clad 12, and a coated resin layer 16 including a primary resin layer 14 and a secondary resin layer 15 provided on the outer periphery of the glass fiber 13.
- the clad 12 surrounds the core 11.
- the core 11 and the clad 12 mainly contain glass such as quartz glass.
- glass such as quartz glass.
- quartz glass or pure quartz glass to which germanium is added can be used for the core 11, and pure quartz glass or pure quartz glass or pure quartz glass can be used for the clad 12. Quartz glass to which fluorine is added can be used.
- the outer diameter (D2) of the glass fiber 13 is about 100 ⁇ m to 125 ⁇ m, and the diameter (D1) of the core 11 constituting the glass fiber 13 is about 7 ⁇ m to 15 ⁇ m.
- the thickness of the coating resin layer 16 is usually about 22 ⁇ m to 70 ⁇ m.
- the thickness of each of the primary resin layer 14 and the secondary resin layer 15 may be about 5 ⁇ m to 50 ⁇ m.
- the thickness of each layer of the primary resin layer 14 and the secondary resin layer 15 may be about 10 ⁇ m to 50 ⁇ m.
- the thickness of the primary resin layer 14 may be 35 ⁇ m
- the thickness of the secondary resin layer 15 may be 25 ⁇ m.
- the outer diameter of the optical fiber 10 may be about 245 ⁇ m to 265 ⁇ m.
- the thickness of each layer of the primary resin layer 14 and the secondary resin layer 15 may be about 8 ⁇ m to 38 ⁇ m.
- the thickness of the primary resin layer 14 may be 25 ⁇ m
- the thickness of the secondary resin layer 15 may be 10 ⁇ m.
- the outer diameter of the optical fiber 10 may be about 173 ⁇ m to 221 ⁇ m.
- the thickness of each layer of the primary resin layer 14 and the secondary resin layer 15 may be about 5 ⁇ m to 32 ⁇ m.
- the thickness of the primary resin layer 14 may be 25 ⁇ m
- the thickness of the secondary resin layer 15 may be 10 ⁇ m.
- the outer diameter of the optical fiber 10 may be about 144 ⁇ m to 174 ⁇ m.
- the method for manufacturing an optical fiber according to the present embodiment is a coating step of applying the above resin composition to the outer periphery of a glass fiber including a core and a clad, and curing the resin composition by irradiating ultraviolet rays after the coating step. Including a curing step.
- the Young's modulus of the secondary resin layer is preferably 800 MPa or more at 23 ° C. ⁇ 2 ° C., more preferably 1000 MPa or more, still more preferably 1200 MPa or more.
- the Young's modulus of the secondary resin layer is not particularly limited, but may be 3000 MPa or less, 2500 MPa or less, or 2000 MPa or less at 23 ° C. ⁇ 2 ° C. from the viewpoint of imparting appropriate toughness to the secondary resin layer.
- the Young's modulus of the secondary resin layer can be measured by the following method. First, the optical fiber is immersed in a mixed solvent of acetone and ethanol, and only the coating resin layer is extracted in a tubular shape. At this time, the primary resin layer and the secondary resin layer are integrated, but the Young's modulus of the primary resin layer is 1/1000 or more and 1/10000 or less of the secondary resin layer, so that the Young's modulus of the primary resin layer is Can be ignored. Next, after removing the solvent from the coated resin layer by vacuum drying, a tensile test (tensile speed is 1 mm / min) is performed at 23 ° C., and the Young's modulus can be obtained by a secant method with 2.5% strain.
- the glass transition temperature (Tg) of the secondary resin layer is preferably 70 ° C. or higher, more preferably 75 ° C. or higher. From the viewpoint of suppressing an increase in transmission loss at a low temperature of the optical fiber, the Tg of the secondary resin layer is preferably 105 ° C. or lower, more preferably 95 ° C. or lower.
- the Tg of the secondary resin layer can be measured by the following method. First, the optical fiber is immersed in a mixed solvent of acetone and ethanol, and only the coating resin layer is extracted in a tubular shape. Next, after removing the solvent from the coated resin layer by vacuum drying, a viscoelastic mode (distance between marked lines: 25 mm), a frequency of 11 Hz, and a temperature rise rate of 5 ° C. were used using "RSA-G2" manufactured by TA Instruments. The dynamic viscoelasticity can be measured under the condition of / min and the temperature range of 25 ° C. to 150 ° C., and the peak top temperature of tan ⁇ can be obtained as Tg. Since the Tg of the primary resin layer is usually 0 ° C. or lower, the Tg of the primary resin layer can be ignored.
- the primary resin layer 14 can be formed by curing a resin composition containing, for example, urethane (meth) acrylate, a monomer, a photopolymerization initiator, and the like.
- the resin composition forming the primary resin layer has a composition different from that of the resin composition for secondary coating.
- the resin composition for the primary coating can be prepared by using a conventionally known technique.
- the Young's modulus of the primary resin layer is preferably 0.5 MPa or less. If the Young's modulus of the primary resin layer exceeds 0.5 MPa, the external force is likely to be transmitted to the glass fiber, and the increase in transmission loss due to microbend may increase.
- multiple optical fibers are arranged in parallel and integrated with a ribbon resin to form an optical fiber ribbon.
- the resin composition according to the present disclosure can also be used as a resin for ribbons. As a result, it is possible to improve the slipperiness and wear resistance of the surface when an external force is applied to the optical fiber ribbon as in the case of the optical fiber.
- Non-reactive urethane compound (A-2) was obtained.
- Mn of the polyol is a value described in the catalog of each product.
- ACQUITY APC RI system manufactured by Waters was used, sample concentration: 0.2% by mass THF solution, injection amount: 20 ⁇ L, sample temperature: 15 ° C., mobile phase: THF, organic.
- Solvent XT column particle diameter 2.5 ⁇ m, pore size 450 ⁇ , column inner diameter 4.6 ⁇ column length 150 mm + particle diameter 2.5 ⁇ m, pore size 125 ⁇ , column inner diameter 4.6 ⁇ column length 150 mm + particle diameter 1.7 ⁇ m, pore size 45 ⁇ , The measurement was carried out under the conditions of a column inner diameter of 4.6 ⁇ a column length of 150 mm, a column temperature of 40 ° C., and a flow velocity of 0.8 mL / min.
- the non-reactive urethane compound, urethane acrylate, bisphenol skeleton-containing diacrylate, monomer, and photopolymerization initiator are mixed in the blending amount (part by mass) shown in Table 1 or Table 2, and the secondary of each Example and Comparative Example.
- a resin composition for coating was prepared.
- Resin composition for primary coating 70 parts by mass of urethane acrylate (Z-1), 19 parts by mass of nonylphenol polyethylene glycol acrylate (manufactured by Sartomer, trade name "SR504"), 5 parts by mass of N-vinylcaprolactum, 5 parts by mass of isobornyl acrylate, Omnirad 1 part by mass of TPO was mixed to obtain a resin composition for primary coating.
- a resin composition for primary coating and a resin composition for secondary coating were applied to the outer peripheral surface of the glass fiber 13 having a diameter of 125 ⁇ m, respectively.
- each resin composition was cured by irradiating with ultraviolet rays to form a coated resin layer 16 including a primary resin layer 14 and a secondary resin layer 15, and an optical fiber 10 was produced.
- the thickness of the primary resin layer 14 was 35 ⁇ m
- the thickness of the secondary resin layer 15 was 25 ⁇ m.
- the optical fiber was immersed in a mixed solvent of acetone and ethanol, and only the coating resin layer was extracted in a cylindrical shape. Next, after removing the solvent from the coated resin layer by vacuum drying, a tensile test (tensile speed was 1 mm / min) was performed at 23 ° C., and the Young's modulus was determined by a secant method with a 2.5% strain. A Young's modulus of 1200 MPa or more was evaluated as "A”, a Young's modulus of 800 MPa or more and less than 1200 MPa was evaluated as "B”, and a Young's modulus of less than 800 MPa was evaluated as "C”.
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Abstract
Description
本出願は、2020年6月24日出願の日本出願第2020-108664号に基づく優先権を主張し、前記日本出願に記載された全ての記載内容を援用するものである。
光ファイバの生産ラインにおいて、ガイドローラーとの接触、スクリーニング試験(光ファイバに数kgの引張負荷をかけ、予め低強度部を取り除く試験)等の外力により、被覆樹脂層の表面の滑り性が徐々に悪化し、光ファイバをボビンに巻き取る際に蛇行してしまい、光ファイバの生産性が低下することがある。光ファイバの生産性を向上するため、セカンダリ樹脂層には、表面の滑り性及び耐摩耗性に優れることが求められている。また、ケーブル内に光ファイバが高密度に収容された際にマイクロベンドに起因する伝送損失の悪化を抑制するために、セカンダリ樹脂層のヤング率を高めることが求められている。しかし、セカンダリ樹脂層の高ヤング率化は、樹脂層の靱性の低下を招き、外力が加わった際にセカンダリ樹脂層に亀裂が入り易くなる。
本開示によれば、高ヤング率を有し、靱性に優れる樹脂層を形成でき、表面の滑り性及び耐摩耗性に優れる光ファイバのセカンダリ被覆用の樹脂組成物、及び生産性に優れる光ファイバを提供することができる。
最初に、本開示の実施形態の内容を列記して説明する。本開示の一態様に係る光ファイバのセカンダリ被覆用の樹脂組成物は、数平均分子量が10000以上50000以下の非反応性ウレタン化合物と、光重合性化合物と、光重合開始剤とを含有する樹脂組成物であり、上記非反応性ウレタン化合物の含有量が、樹脂組成物の総量を基準として、0.05質量部以上5質量部以下であり、上記非反応性ウレタン化合物は、数平均分子量が8000以上20000以下のポリオールと、ジイソシアネートと、活性水素を有する化合物との反応物である。
本実施形態に係る樹脂組成物及び光ファイバの具体例を、必要により図面を参照しつつ説明する。なお、本開示はこれらの例示に限定されず、請求の範囲によって示され、請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。以下の説明では、図面の説明において同一の要素には同一の符号を付し、重複する説明を省略する。
本実施形態に係る樹脂組成物は、非反応性ウレタン化合物と、光重合性化合物と、光重合開始剤とを含有する。本明細書において、「非反応性」とは、光重合性基を有しないことを意味する。
M-(U-I-U-P2)m-U-M (1)
ここで、Mはメタノールの残基を、Uはウレタン結合を、Iは2,4-トリレンジイソシアネートの残基を、P2はポリプロピレングリコールの残基を表し、mは1以上の整数である。ポリプロピレングリコールと2,4-トリレンジイソシアネートを反応させる際のNCOとOHのモル比(NCO/OH)は、1.5以上2.5以下が好ましく、1.8以上2.2以下がより好ましい。NCO末端プレポリマーのNCOに対してのメタノールのモル比は1.00以上1.15以下が好ましく、1.03以上1.10以下がより好ましい。
(HO)t-P3-(U-I-U)s-M (2)
ここで、Mはメタノールの残基を、Uはウレタン結合を、Iは2,4-トリレンジイソシアネートの残基を、P3はポリプロピレントリオールの残基を表し、tは0、1又は2であり、sは1以上3以下の整数であり、t+sは3である。2,4-トリレンジイソシアネートのNCOとメタノールのモル比(NCO/OH)は、1.95以上2.05以下が好ましい。ポリプロピレントリオールのOHと部分ブロックイソシアネートのNCOのモル比は(OH/NCO)は、1.0以上1.5以下が好ましく、1.03以上1.3以下がより好ましい。
A-(U-I-U-P)n-U-A (3)
ここで、Aは2-ヒドロキシエチルアクリレートの残基を、Uはウレタン結合を、Iは2,4-トリレンジイソシアネートの残基を、Pはポリプロピレングリコールの残基を表し、nは1以上の整数である。nはNCO/OHを変えることで、ウレタンアクリレートが有するウレタン結合の割合を変えることができる。NCO/OHが小さいほど、nが大きくなり、NCO/OHが大きいほど、nは小さくなる。
図1は、本実施形態に係る光ファイバの一例を示す概略断面図である。光ファイバ10は、コア11及びクラッド12を含むガラスファイバ13と、ガラスファイバ13の外周に設けられたプライマリ樹脂層14及びセカンダリ樹脂層15を含む被覆樹脂層16とを備えている。
(A-1)
Mn12000のポリプロピレングリコール(AGC株式会社製、PREMINOL S4013F)と2,4-トリレンジイソシアネート(TDI)とを、NCOとOHのモル比(NCO/OH)=2.0で、60℃で1時間反応させ、NCO末端プレポリマーを調製した。触媒として、ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。次に、NCO末端プレポリマーのNCOに対して、メタノールのOHのモル比が1.05となるようにメタノールを添加し、60℃で1時間反応させて、Mn25600の非反応性ウレタン化合物(A-1)を得た。
Mn18000のポリプロピレングリコール(AGC株式会社製、PREMINOL S4318F)とTDIとをNCO/OH=2.0で反応させ、NCO末端プレポリマーを調製した以外は(A-1)の合成と同様にして、Mn43300の非反応性ウレタン化合物(A-2)を得た。
イソホロンジイソシアネート(IPDI)とメタノールを、NCO/OH=2.0で、60℃で1時間反応させ、部分ブロックイソシアネートを調製した。触媒として、ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。次に、部分ブロックイソシアネートに対して、Mn10000のポリプロピレントリオール(AGC株式会社製、PREMINOL S 3011)をOH/NCO=1.05となるように添加し、60℃で1時間反応させて、Mn16600の非反応性ウレタン化合物(A-3)を得た。
Mn3000のポリプロピレングリコールとTDIとをNCO/OH=2.0で反応させ、NCO末端プレポリマーを調製した以外は(A-1)の合成と同様にして、Mn7300の非反応性ウレタン化合物(Y-1)を得た。
Mn4000のポリプロピレングリコールとTDIとをNCO/OH=2.0で反応させ、NCO末端プレポリマーを調製した以外は(A-1)の合成と同様にして、Mn9700の非反応性ウレタン化合物(Y-2)を得た。
Mn18000のポリプロピレングリコールとTDIとをNCO/OH=1.5で反応させ、NCO末端プレポリマーを調製した以外は(A-1)の合成と同様にして、Mn63200の非反応性ウレタン化合物(Y-3)を得た。
(B-1)
Mn400のポリプロピレングリコールとIPDIをNCO/OH=1.5で、60℃で1時間反応させ、NCO末端プレポリマーを調製した。触媒として、ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。次に、NCO末端プレポリマーのNCOに対して、2-ヒドロキシエチルアクリレート(HEA)のOHのモル比が1.05となるようにHEAを添加し、60℃で1時間反応させて、Mn1900のウレタンアクリレート(B-1)を得た。
Mn600のポリプロピレングリコールとTDIとをNCO/OH=2.0で反応させ、NCO末端プレポリマーを調製した以外は(B-1)の合成と同様にして、Mn2200のウレタンアクリレート(B-2)を得た。
Mn600のポリプロピレングリコールとTDIとをNCO/OH=6.0で反応させ、NCO末端プレポリマーを調製した以外は(B-1)の合成と同様にして、Mn760のウレタンアクリレート(B-3)を得た。
Mn1000のポリプロピレングリコールとTDIとをNCO/OH=2.0で反応させ、NCO末端プレポリマーを調製した以外は(B-1)の合成と同様にして、Mn2900のウレタンアクリレート(B-4)を得た。
Mn2000のポリプロピレングリコールとTDIとをNCO/OH=2.0で反応させ、NCO末端プレポリマーを調製した以外は(B-1)の合成と同様にして、Mn5400のウレタンアクリレート(B-5)を得た。
Mn3000のポリプロピレングリコールとIPDIとをNCO/OH=1.5で、60℃で1時間反応させ、NCO末端プレポリマーを調製した以外は(B-1)の合成と同様にして、Mn11400のウレタンアクリレート(Z-1)を得た。
ビスフェノール骨格含有ジアクリレートとして、ビスフェノールAエポキシジ(メタ)アクリレート(ビスコート#540)及びビスフェノールAのEO付加物ジアクリレート(ビスコート#700)を準備した。モノマーとして、トリプロピレングリコールジアクリレート(TPGDA)及び2-フェノキシエチルアクリレート(POA)を準備した。光重合開始剤として、2,4,6-トリメチルベンゾイルジフェニルホスフィンオキシド(Omnirad TPO)及び1-ヒドロキシシクロヘキシルフェニルケトン(Omnirad 184)を準備した。
樹脂組成物を目視で観察し、透明であれば「OK」、白濁していれば「NG」とした。比較例4の樹脂組成物は、白濁していたため、光ファイバの作製に用いなかった。
ウレタンアクリレート(Z-1)を70質量部、ノニルフェノールポリエチレングリコールアクリレート(Sartomer製、商品名「SR504」)を19質量部、N-ビニルカプロラクタムを5質量部、イソボルニルアクリレートを5質量部、Omnirad TPOを1質量部混合して、プライマリ被覆用の樹脂組成物を得た。
直径125μmのガラスファイバ13の外周面に、プライマリ被覆用の樹脂組成物とセカンダリ被覆用の樹脂組成物とをそれぞれ塗布した。次いで、紫外線を照射することでぞれぞれの樹脂組成物を硬化し、プライマリ樹脂層14及びセカンダリ樹脂層15を備える被覆樹脂層16を形成し、光ファイバ10を作製した。プライマリ樹脂層14の厚さを35μm、セカンダリ樹脂層15の厚さを25μmとした。
光ファイバをアセトンとエタノールの混合溶剤に浸漬し、被覆樹脂層のみを筒状に抜き出した。次に、被覆樹脂層から真空乾燥により溶剤を除いた後、23℃で引張試験(引張速度は1mm/分)を行い、2.5%歪の割線式によりヤング率を求めた。ヤング率が1200MPa以上を「A」、ヤング率が800MPa以上1200MPa未満を「B」、ヤング率が800MPa未満を「C」と評価した。
光ファイバをアセトンとエタノールの混合溶剤に浸漬し、被覆樹脂層のみを筒状に抜き出した。次に、被覆樹脂層から真空乾燥により溶剤を除いた後、23℃で引張試験(引張速度は50mm/分)を行い、破断伸びを求めた。破断伸びが10%以上を「A」、破断伸びが5%以上10%未満を「B」、破断伸びが5%未満を「C」と評価した。
光ファイバの生産性を評価するため、巻き異常頻度を測定した。線速1000m/分で、光ファイバを500km巻き替え(50km×10ボビン)、OTDR(光パルス試験器)を用いて、各ボビンの長手の伝送損失を評価した。測定波長は1550nmとした。Point Discontinuitiesが0.05dBを超える箇所(巻き異常頻度)が2か所以下/500kmを「A」、3から5か所/500kmを「B」、6か所以上/500kmを「C」と評価した。
11 コア
12 クラッド
13 ガラスファイバ
14 プライマリ樹脂層
15 セカンダリ樹脂層
16 被覆樹脂層
Claims (7)
- 数平均分子量が10000以上50000以下の非反応性ウレタン化合物と、光重合性化合物と、光重合開始剤とを含有する樹脂組成物であり、
前記非反応性ウレタン化合物の含有量が、前記樹脂組成物の総量を基準として、0.05質量部以上5質量部以下であり、
前記非反応性ウレタン化合物が、数平均分子量が8000以上20000以下のポリオールと、ジイソシアネートと、活性水素を有する化合物との反応物である、光ファイバのセカンダリ被覆用の樹脂組成物。 - 前記ポリオールがポリプロピレンポリオールである、請求項1に記載の樹脂組成物。
- 前記活性水素を有する化合物が、1価アルコールである、請求項1又は請求項2に記載の樹脂組成物。
- 前記光重合性化合物が、数平均分子量が500以上6000以下のウレタン(メタ)アクリレートを前記樹脂組成物の総量を基準として、5質量部以上40質量部以下含み、
前記ウレタン(メタ)アクリレートが、数平均分子量が300以上2500以下のポリオールと、ジイソシアネートと、水酸基含有(メタ)アクリレートとの反応物である、請求項1から請求項3のいずれか一項に記載の樹脂組成物。 - 前記光重合性化合物が、ビスフェノール骨格含有(メタ)アクリレートを前記樹脂組成物の総量を基準として、30質量部以上70質量部以下含む、請求項1から請求項4のいずれか一項に記載の樹脂組成物。
- コア及びクラッドを含むガラスファイバと、
前記ガラスファイバに接して該ガラスファイバを被覆するプライマリ樹脂層と、
前記プライマリ樹脂層を被覆するセカンダリ樹脂層と、を備え、
前記セカンダリ樹脂層が、請求項1から請求項5のいずれか一項に記載の樹脂組成物の硬化物を含む、光ファイバ。 - コア及びクラッドを含むガラスファイバの外周に、請求項1から請求項5のいずれか一項に記載の樹脂組成物を塗布する塗布工程と、
前記塗布工程の後に紫外線を照射することにより前記樹脂組成物を硬化させる硬化工程と、
を含む、光ファイバの製造方法。
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| WO2022130808A1 (ja) * | 2020-12-16 | 2022-06-23 | 住友電気工業株式会社 | 樹脂組成物、光ファイバのセカンダリ被覆材料、光ファイバ及び光ファイバの製造方法 |
| US20240116807A1 (en) * | 2020-12-21 | 2024-04-11 | Sumitomo Electric Industries, Ltd. | Resin composition, method for producing resin composition, optical fiber, method for producing optical fiber, optical fiber ribbon, and optical fiber cable |
| US20240101474A1 (en) * | 2021-02-04 | 2024-03-28 | Sumitomo Electric Industries, Ltd. | Resin composition, optical fiber, optical fiber manufacturing method, optical fiber ribbon, and optical fiber cable |
| EP4317155A4 (en) * | 2021-03-23 | 2024-07-31 | Mitsubishi Chemical Corporation | COMPOUND, RELATED PRODUCTION METHOD, POLYMERIZABLE COMPOSITION, POLYMER, HOLOGRAPHIC RECORDING MEDIUM, OPTICAL MATERIAL AND OPTICAL COMPONENT |
| JP2024121142A (ja) * | 2023-02-27 | 2024-09-06 | 住友電気工業株式会社 | 光ファイバおよび光ファイバリボン |
| JP2024121143A (ja) * | 2023-02-27 | 2024-09-06 | 住友電気工業株式会社 | 光ファイバおよび光ファイバリボン |
-
2021
- 2021-05-06 EP EP21828168.1A patent/EP4174039A4/en active Pending
- 2021-05-06 JP JP2022532375A patent/JP7658371B2/ja active Active
- 2021-05-06 WO PCT/JP2021/017380 patent/WO2021261088A1/ja not_active Ceased
- 2021-05-06 CN CN202180042174.2A patent/CN115916721B/zh active Active
- 2021-05-06 US US18/010,042 patent/US12215248B2/en active Active
- 2021-06-17 TW TW110122160A patent/TWI889849B/zh active
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Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2021261088A1 (ja) | 2021-12-30 |
| CN115916721B (zh) | 2025-04-08 |
| TW202210594A (zh) | 2022-03-16 |
| US20230193073A1 (en) | 2023-06-22 |
| EP4174039A1 (en) | 2023-05-03 |
| US12215248B2 (en) | 2025-02-04 |
| EP4174039A4 (en) | 2024-03-13 |
| TWI889849B (zh) | 2025-07-11 |
| CN115916721A (zh) | 2023-04-04 |
| JP7658371B2 (ja) | 2025-04-08 |
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