WO2020170891A1 - Composition de résine ignifuge, fil électrique isolé obtenu à l'aide de celle-ci, câble, câble à fibre optique et objet moulé - Google Patents

Composition de résine ignifuge, fil électrique isolé obtenu à l'aide de celle-ci, câble, câble à fibre optique et objet moulé Download PDF

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Publication number
WO2020170891A1
WO2020170891A1 PCT/JP2020/005216 JP2020005216W WO2020170891A1 WO 2020170891 A1 WO2020170891 A1 WO 2020170891A1 JP 2020005216 W JP2020005216 W JP 2020005216W WO 2020170891 A1 WO2020170891 A1 WO 2020170891A1
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Prior art keywords
flame
resin composition
retardant resin
mass
parts
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PCT/JP2020/005216
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English (en)
Japanese (ja)
Inventor
誠之 岩田
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株式会社フジクラ
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Priority to JP2021501879A priority Critical patent/JP7108124B2/ja
Publication of WO2020170891A1 publication Critical patent/WO2020170891A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring

Definitions

  • the present invention relates to a flame-retardant resin composition, an insulated electric wire, a cable, an optical fiber cable and a molded body using the same.
  • Cables, etc. may require high flame retardancy.
  • a flame-retardant resin composition is used in the coating.
  • a flame-retardant resin composition for example, a flame-retardant resin composition in which calcium carbonate particles, a silicone compound and a fatty acid-containing compound are mixed with a polyolefin resin is known (see Patent Document 1 below).
  • the flame-retardant resin composition described in Patent Document 1 has excellent flame retardancy, when a fatty acid metal salt is used as the fatty acid-containing compound, it is improved in terms of suppressing foaming during molding. Had room for.
  • the present invention has been made in view of the above circumstances, and it is possible to sufficiently suppress foaming during molding, and a flame-retardant resin composition having excellent flame retardancy, an insulated wire, a cable, and an optical fiber using the same.
  • An object is to provide a cable and a molded body.
  • the present inventor has conducted repeated studies to solve the above problems.
  • the present inventor considered that the fatty acid metal salt may absorb water depending on the ambient humidity because the fatty acid metal salt has high hygroscopicity. And in such a case, this inventor thought that the following things might occur. That is, when molding a flame-retardant resin composition containing a base resin, a silicone compound and a fatty acid metal salt, the fatty acid metal salt is placed at a high temperature. Therefore, water is released from the fatty acid metal salt as water vapor, and foaming occurs in the obtained molded body. Then, as a result of earnest studies to sufficiently suppress such foaming, the present inventor has found that the above invention can solve the above problems.
  • the present invention is a flame-retardant resin composition containing a base resin, a silicone compound, a fatty acid metal salt, and a first inorganic filler composed of a divalent metal oxide.
  • the flame-retardant resin composition of the present invention can sufficiently suppress foaming during molding and has excellent flame retardancy.
  • the present inventor speculates that the above-mentioned effects are obtained in the flame-retardant resin composition of the present invention as follows.
  • the flame-retardant resin composition contains a fatty acid metal salt
  • the fatty acid metal salt may be sufficiently absorbing water depending on the ambient humidity.
  • the fatty acid metal salt is placed at a high temperature during the molding of the flame-retardant resin composition, and the water content thereof is released as steam.
  • the flame-retardant resin composition does not contain the first inorganic filler made of an oxide of a divalent metal
  • the water vapor may cause foaming.
  • the flame-retardant resin composition contains an oxide of a divalent metal, and the oxide of the divalent metal reacts with steam released from the fatty acid metal salt at high temperature. To do. Therefore, foaming due to water vapor is sufficiently suppressed.
  • a barrier layer mainly composed of a silicone compound, a fatty acid metal salt and a decomposed product of these is formed on the surface of the base resin, and the burning of the base resin is suppressed. It Therefore, it is considered that excellent flame retardancy is secured.
  • the divalent metal oxide is preferably magnesium oxide.
  • the mass ratio R of the first inorganic filler to the fatty acid metal salt is preferably 1/100 or more.
  • the mass ratio R of the first inorganic filler to the fatty acid metal salt is preferably 1 or less.
  • the flame retardancy of the flame-retardant resin composition can be further improved as compared with the case where the mass ratio R exceeds 1.
  • the silicone compound is blended in a ratio of 1 part by mass or more with respect to 100 parts by mass of the base resin.
  • the flame-retardant resin composition of the present invention can further improve the flame retardancy as compared with the case where the blending ratio of the silicone compound is less than 1 part by mass with respect to 100 parts by mass of the base resin.
  • the fatty acid metal salt is mixed in a proportion of 2 parts by mass or more with respect to 100 parts by mass of the base resin.
  • the flame-retardant resin composition of the present invention has a higher flame-retardant property than the case where the blending ratio of the fatty acid metal salt to 100 parts by mass of the base resin is less than 2 parts by mass. Can be improved.
  • the first inorganic filler is mixed in a ratio of 0.05 parts by mass or more with respect to 100 parts by mass of the base resin.
  • the flame-retardant resin composition of the present invention can more sufficiently suppress foaming during molding.
  • the flame-retardant resin composition preferably further contains a second inorganic filler made of an inorganic substance different from the divalent metal oxide.
  • the flame retardancy of the flame retardant resin composition can be further improved.
  • the inorganic substance is preferably at least one selected from the group consisting of calcium carbonate and silicate compounds.
  • the flame retardancy of the flame retardant resin composition can be improved particularly effectively.
  • the second inorganic filler is mixed in a ratio of 1 to 200 parts by mass with respect to 100 parts by mass of the base resin.
  • the flame retardancy of the flame-retardant resin composition can be more sufficiently improved, and the abrasion resistance can be further improved.
  • the present invention includes an insulated electric wire that includes a conductor and an insulating layer that covers the conductor, and the insulating layer is an insulated electric wire obtained by extrusion-molding the flame-retardant resin composition described above.
  • the insulating layer is obtained by extrusion-molding the flame-retardant resin composition described above.
  • the flame-retardant resin composition of the present invention can sufficiently suppress foaming during extrusion molding and has excellent flame retardancy. Therefore, the obtained insulating layer has less foaming, and the insulating layer has excellent flame retardancy. Therefore, the insulated wire of the present invention has excellent flame retardancy while having a good appearance.
  • the present invention includes a conductor and an insulated electric wire having an insulating layer that covers the conductor, and a sheath that covers the insulated electric wire, and at least one of the insulating layer and the sheath is the flame-retardant resin. It is a cable obtained by extruding a composition.
  • the cable of the present invention at least one of the insulating layer and the sheath is obtained by extruding the flame-retardant resin composition.
  • the flame-retardant resin composition of the present invention can sufficiently suppress foaming during extrusion molding and has excellent flame retardancy. Therefore, foaming is reduced in at least one of the obtained insulating layer and sheath, and at least one of the insulating layer and sheath has excellent flame retardancy. Therefore, the cable of the present invention has excellent flame retardancy while having a good appearance.
  • the present invention is an optical fiber cable comprising an optical fiber and a coating part for coating the optical fiber, at least a part of the coating part being obtained by extrusion molding the above-mentioned flame-retardant resin composition. ..
  • the optical fiber cable of the present invention at least a part of the coating portion is obtained by extruding the flame-retardant resin composition.
  • the flame-retardant resin composition of the present invention can sufficiently suppress foaming during extrusion molding and has excellent flame retardancy. Therefore, foaming is reduced in at least a part of the obtained coated portion, and at least a part of the coated portion has excellent flame retardancy. Therefore, the optical fiber cable of the present invention has excellent flame retardancy while having a good appearance.
  • the present invention is also a molded product obtained by molding the above flame-retardant resin composition.
  • the flame-retardant resin composition of the present invention can sufficiently suppress foaming during molding and has excellent flame retardancy. For this reason, the obtained molded product has less foaming, and the molded product has excellent flame retardancy. Therefore, the molded product of the present invention has excellent flame retardancy while having a good appearance.
  • a flame-retardant resin composition that can sufficiently suppress foaming during molding and has excellent flame retardancy, an insulated wire, a cable and an optical fiber cable using the same are provided.
  • FIG. 2 is a sectional view taken along line II-II of FIG. 1. It is sectional drawing which shows one Embodiment of the optical fiber cable of this invention.
  • FIG. 1 is a partial side view showing an embodiment of a cable according to the present invention.
  • FIG. 2 is a sectional view taken along line II-II of FIG.
  • the cable 10 includes an insulated wire 4 and a tubular coating layer 3 as a sheath that covers the insulated wire 4.
  • the insulated wire 4 has the conductor 1 and the tubular insulating layer 2 that covers the conductor 1.
  • the tubular insulating layer 2 and the coating layer 3 are obtained by extrusion-molding a flame-retardant resin composition, and this flame-retardant resin composition comprises a base resin, a silicone compound, and a fatty acid metal. It includes a salt and a first inorganic filler made of a divalent metal oxide.
  • the insulating layer 2 and the coating layer 3 are obtained by extruding the flame-retardant resin composition.
  • the flame-retardant resin composition can sufficiently suppress foaming during extrusion molding and has excellent flame retardancy. Therefore, the resulting insulating layer 2 and coating layer 3 have less foaming, and the insulating layer 2 and coating layer 3 have excellent flame retardancy. Therefore, the cable 10 has excellent flame retardancy while having a good appearance.
  • the conductor 1 is prepared.
  • the conductor 1 may be composed of only one elemental wire, or may be composed of a plurality of elemental wires bundled together. Further, the conductor 1 is not particularly limited in terms of the conductor diameter, the material of the conductor, etc., and can be appropriately determined according to the application.
  • the flame-retardant resin composition contains the base resin, the silicone compound, the fatty acid metal salt, and the first inorganic filler made of a divalent metal oxide.
  • Base resin examples of the base resin include polyolefin resins and modified resins thereof. You may use these individually or in mixture of 2 or more types.
  • polyolefin resin examples include ethylene-based polymers, propylene-based polymers, and olefin-based thermoplastic elastomers. These may be used alone or in admixture of two or more.
  • the ethylene-based polymer is a polymer mainly composed of a constitutional unit derived from ethylene.
  • Examples of the ethylene-based polymer include polyethylene, ethylene- ⁇ -olefin copolymer, ethylene propylene diene copolymer and the like.
  • polyethylene examples include high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear polyethylene (LLDPE), ultra low density polyethylene (VLDPE), and metallocene ultra low density polyethylene. To be You may use these individually or in mixture of 2 or more types.
  • HDPE high density polyethylene
  • MDPE medium density polyethylene
  • LDPE low density polyethylene
  • LLDPE linear polyethylene
  • VLDPE ultra low density polyethylene
  • metallocene ultra low density polyethylene examples include metallocene ultra low density polyethylene.
  • Propylene-based polymer refers to a polymer mainly containing constitutional units derived from propylene.
  • Examples of the propylene-based polymer include homopolypropylene, block polypropylene, random polypropylene, and propylene- ⁇ -olefin copolymer.
  • Examples of ⁇ -olefins include 1-butene, 2-butene, 1-hexene and 2-hexene.
  • the propylene-based polymer when the propylene-based polymer is a copolymer containing a comonomer, the propylene-based polymer may be a block copolymer or a random copolymer, but is preferably a block copolymer.
  • the propylene- ⁇ -olefin copolymer is a block copolymer, the abrasion resistance of the flame-retardant resin composition can be further improved as compared with the case where it is a random copolymer.
  • thermoplastic elastomer examples include polypropylene (hard segment) in which ethylene propylene rubber (EPDM, EPM) and/or a crosslinked product thereof is dispersed as a soft segment.
  • EPDM ethylene propylene rubber
  • the modified resin is a resin obtained by modifying the above-mentioned polyolefin resin or its precursor by grafting or copolymerization.
  • the functional group introduced by modification include a carboxyl group, an acid anhydride group, a methacryloxy group, an acryloxy group, an acryl group, an acetyl group, and an alkoxy group (for example, a methoxy group or an ethoxy group). Of these, a carboxyl group and an acid anhydride group are preferable.
  • the abrasion resistance of the flame-retardant resin composition can be more effectively improved as compared with the case where the functional group introduced by modification is a functional group other than the carboxyl group and the acid anhydride group.
  • Materials used for grafting or copolymerization include acids, acid anhydrides and their derivatives.
  • the acid include carboxylic acids such as acetic acid, acrylic acid, maleic acid, and methacrylic acid.
  • Examples of the acid anhydride include carboxylic acid anhydride such as maleic anhydride.
  • modified resin for example, ethylene-vinyl acetate copolymer, ethylene-acrylic acid ester copolymer, ethylene-methacrylic acid ester copolymer, maleic acid modified polyolefin, maleic anhydride modified polyolefin, maleic acid modified styrene elastomer, Examples thereof include maleic anhydride-modified styrene elastomer.
  • the silicone compound functions as a flame retardant, and examples of the silicone compound include polyorganosiloxane.
  • the polyorganosiloxane has a siloxane bond in the main chain and has an organic group in the side chain, and examples of the organic group include an alkyl group such as a methyl group, an ethyl group and a propyl group; a vinyl group; and a phenyl group. Examples include aryl groups such as groups.
  • polyorganosiloxane examples include dimethylpolysiloxane, methylethylpolysiloxane, methyloctylpolysiloxane, methylvinylpolysiloxane, methylphenylpolysiloxane, and methyl(3,3,3-trifluoropropyl)polysiloxane. Is mentioned.
  • the polyorganosiloxane is used in the form of silicone oil, silicone powder, silicone gum or silicone resin. Among them, polyorganosiloxane is preferably used in the form of silicone gum. In this case, bloom is less likely to occur in the flame-retardant resin composition, as compared with the case where the silicone compound is a silicone compound other than silicone gum.
  • the mixing ratio of the silicone compound to 100 parts by mass of the base resin is not particularly limited as long as it is larger than 0 parts by mass, but is preferably 1 part by mass or more.
  • the flame retardancy of the flame-retardant resin composition can be further improved as compared with the case where the mixing ratio of the silicone compound is less than 1 part by mass with respect to 100 parts by mass of the base resin.
  • the mixing ratio of the silicone compound to 100 parts by mass of the base resin is more preferably 1.5 parts by mass or more.
  • the flame retardancy of the flame-retardant resin composition can be more sufficiently improved as compared with the case where the blending ratio of the silicone compound is less than 1.5 parts by mass. It is even more preferable that the mixing ratio of the silicone compound to 100 parts by mass of the base resin is 2 parts by mass or more.
  • the mixing ratio of the silicone compound to 100 parts by mass of the base resin is preferably 10 parts by mass or less.
  • the abrasion resistance of the flame-retardant resin composition can be further improved, as compared with the case where the mixing ratio of the silicone compound to 100 parts by mass of the base resin is larger than 10 parts by mass.
  • the mixing ratio of the silicone compound to 100 parts by mass of the base resin is more preferably 7 parts by mass or less.
  • the abrasion resistance of the flame-retardant resin composition can be more sufficiently improved as compared with the case where the mixing ratio of the silicone compound exceeds 7 parts by mass.
  • the mixing ratio of the silicone compound to 100 parts by mass of the base resin is more preferably 5 parts by mass or less, and particularly preferably 3 parts by mass or less.
  • the fatty acid metal salt functions as a flame retardant.
  • the fatty acid metal salt refers to a metal salt of fatty acid.
  • a fatty acid having 12 to 28 carbon atoms is used as the fatty acid.
  • fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, tuberculostearic acid, oleic acid, linoleic acid, arachidonic acid, behenic acid and montanic acid.
  • stearic acid or tuberculostearic acid is preferable, and stearic acid is particularly preferable.
  • the flame retardancy of the flame-retardant resin composition can be further improved as compared with the case of using a fatty acid other than stearic acid or tuberculostearic acid.
  • the metal constituting the metal salt of fatty acid magnesium, calcium, zinc, lead and the like can be mentioned.
  • Magnesium stearate is preferred as the fatty acid metal salt. In this case, as compared with the case of using a fatty acid metal salt other than magnesium stearate, more excellent flame retardancy can be obtained with a smaller addition amount in the flame retardant resin composition.
  • the mixing ratio of the fatty acid metal salt to 100 parts by mass of the base resin is not particularly limited, but it is preferably 1 part by mass or more. In this case, the flame retardancy of the flame-retardant resin composition can be further improved, as compared with the case where the mixing ratio of the fatty acid metal salt to 100 parts by mass of the base resin is less than 1 part by mass.
  • the mixing ratio of the fatty acid metal salt to 100 parts by mass of the base resin is more preferably 2 parts by mass or more.
  • the flame retardancy of the flame-retardant resin composition can be further improved, as compared with the case where the mixing ratio of the fatty acid metal salt is less than 2 parts by mass with respect to 100 parts by mass of the base resin.
  • the mixing ratio of the fatty acid metal salt to 100 parts by mass of the base resin is preferably 20 parts by mass or less.
  • the abrasion resistance of the flame-retardant resin composition can be further improved as compared with the case where the blending ratio of the fatty acid metal salt with respect to 100 parts by mass of the base resin exceeds 20 parts by mass.
  • the mixing ratio of the fatty acid metal salt to 100 parts by mass of the base resin is preferably 10 parts by mass or less, more preferably 7 parts by mass or less, and further preferably 5 parts by mass or less.
  • the abrasion resistance of the flame-retardant resin composition can be further improved as compared with the case where the blending ratio of the fatty acid metal salt to 100 parts by mass of the base resin is larger than 10 parts by mass.
  • the first inorganic filler is a divalent metal oxide.
  • divalent metal oxides include magnesium oxide and calcium oxide. These may be used alone or in admixture of two or more.
  • magnesium oxide is preferable as the oxide of the divalent metal. In this case, it is possible to suppress deterioration of the flame retardancy of the insulating layer 2 and the coating layer 3 obtained by extrusion-molding the flame-retardant resin composition.
  • the mixing ratio of the first inorganic filler to 100 parts by mass of the base resin may be more than 0 parts by mass, but is preferably 0.05 parts by mass or more. In this case, as compared with the case where the mixing ratio of the first inorganic filler is less than 0.05 parts by mass with respect to 100 parts by mass of the base resin, foaming during molding of the flame-retardant resin composition can be more sufficiently suppressed. ..
  • the mixing ratio of the first inorganic filler to 100 parts by mass of the base resin is preferably 20 parts by mass or less.
  • the flame retardancy of the flame-retardant resin composition can be further improved as compared with the case where the mixing ratio of the first inorganic filler with respect to 100 parts by mass of the base resin exceeds 20 parts by mass.
  • the mixing ratio of the first inorganic filler with respect to 100 parts by mass of the base resin is more preferably 10 parts by mass or less, even more preferably 7 parts by mass or less, and particularly preferably 3 parts by mass or less.
  • the second inorganic filler is made of an inorganic substance different from the divalent metal oxide.
  • the inorganic substance is not particularly limited as long as it is an inorganic substance different from the oxide of the divalent metal, and examples of the inorganic substance include calcium carbonate and silicate compounds. These may be used alone or in admixture of two or more.
  • the inorganic substance is preferably calcium carbonate, a silicate compound or a mixture thereof.
  • the flame retardancy of the flame-retardant resin composition can be further improved.
  • silicate compounds examples include clay and talc. These can be used alone or in combination of two or more.
  • the mixing ratio of the second inorganic filler to 100 parts by mass of the base resin is preferably 1 to 200 parts by mass.
  • the flame retardancy of the flame-retardant resin composition can be further improved as compared with the case where the mixing ratio of the second inorganic filler to 100 parts by mass of the base resin is less than 1 part by mass.
  • the abrasion resistance of the flame-retardant resin composition can be further improved as compared with the case where the mixing ratio of the second inorganic filler with respect to 100 parts by mass of the base resin exceeds 200 parts by mass.
  • the mixing ratio of the second inorganic filler to 100 parts by mass of the base resin is more preferably 5 to 100 parts by mass.
  • the flame-retardant resin composition may further contain a filler such as an antioxidant, a UV deterioration inhibitor, a processing aid, a color pigment, and a lubricant, if necessary.
  • a filler such as an antioxidant, a UV deterioration inhibitor, a processing aid, a color pigment, and a lubricant, if necessary.
  • the flame-retardant resin composition can be obtained by kneading a base resin, a silicone compound, a fatty acid metal salt, a first inorganic filler, and, if necessary, a second inorganic filler.
  • the fatty acid metal salt is preferably used in a dried state.
  • the remaining bubbles may remain in the insulating layer 2 and the coating layer 3 obtained by extrusion molding of the flame-retardant resin composition. Sufficiently suppressed.
  • the kneading can be performed with a kneading machine such as a Banbury mixer, a tumbler, a pressure kneader, a kneading extruder, a twin-screw extruder, and a mixing roll.
  • a kneading machine such as a Banbury mixer, a tumbler, a pressure kneader, a kneading extruder, a twin-screw extruder, and a mixing roll.
  • a kneading machine such as a Banbury mixer, a tumbler, a pressure kneader, a kneading extruder, a twin-screw extruder, and a mixing roll.
  • MB masterbatch
  • the conductor 1 is coated with the above flame-retardant resin composition.
  • the above flame-retardant resin composition is melt-kneaded using an extruder and extrusion-molded to form a tubular extrudate.
  • the tubular extrudate is continuously coated on the conductor 1.
  • the insulating layer 2 is formed on the conductor 1 and the insulated wire 4 is obtained.
  • the flame-retardant resin composition is preferably stored in a dry state until the insulating layer 2 is formed on the conductor 1. In this case, moisture absorption of the fatty acid metal salt in the flame-retardant resin composition is sufficiently suppressed, the amount of water released from the fatty acid metal salt during extrusion molding of the flame-retardant resin composition is reduced, and Foaming is sufficiently suppressed.
  • ⁇ Coating layer> Finally, one insulated electric wire 4 obtained as described above is prepared, and this insulated electric wire 4 is covered with the coating layer 3 as an insulator produced by using the flame-retardant resin composition described above.
  • the coating layer 3 is a so-called sheath and protects the insulating layer 2 from physical or chemical damage.
  • the cable 10 is obtained as described above.
  • the present invention is a molded product obtained by molding the flame-retardant resin composition described above.
  • the flame-retardant resin composition described above can sufficiently suppress foaming during molding and has excellent flame retardancy. For this reason, the obtained molded product has less foaming, and the molded product has excellent flame retardancy. Therefore, the molded product has excellent flame retardancy while having a good appearance.
  • the above-mentioned molded body can be obtained by a general molding method such as an injection molding method or an extrusion molding method.
  • the present invention is not limited to the above embodiment.
  • a cable having one insulated electric wire 4 is used as the cable, but the cable of the present invention is not limited to the cable having one insulated electric wire 4, and the coating layer 3
  • a cable having two or more insulated wires 4 inside may be used.
  • a resin portion made of polypropylene or the like may be provided between the coating layer 3 and the insulated wire 4.
  • the insulating layer 2 and the coating layer 3 of the insulated wire 4 are comprised by the said flame retardant resin composition, the insulating layer 2 is not comprised by the said flame retardant resin composition.
  • the coating layer 3 may be formed of a normal insulating resin, and only the coating layer 3 may be formed of the flame-retardant resin composition described above. And only the insulating layer 2 may be composed of the above flame-retardant resin composition. Further, the coating layer 3 is not always necessary and can be omitted.
  • the flame-retardant resin composition forming the insulating layer 2 and the coating layer 3 of the insulated wire 4 in the above-described embodiment also serves as a coating portion of an optical fiber cable including an optical fiber and a coating portion that coats the optical fiber.
  • FIG. 3 is a sectional view showing an indoor type optical fiber cable as an embodiment of the optical fiber cable of the present invention.
  • the optical fiber cable 20 includes two tension members 22 and 23, an optical fiber 24, and a coating portion 25 that covers these.
  • the optical fiber 24 is provided so as to penetrate the covering portion 25.
  • the covering portion 25 is made of the flame-retardant resin composition that forms the insulating layer 2 and the covering layer 3 of the insulated wire 4 in the above-described embodiment.
  • the entire covering portion 25 is composed of the flame-retardant resin composition forming the insulating layer 2 and the covering layer 3 of the insulated wire 4, but only a part of the covering portion 25 is formed. It may be made of a flame-retardant resin composition that forms the insulating layer 2 and the coating layer 3 of the insulated wire 4.
  • Examples 1 to 10 and Comparative Examples 1 to 7 The base resin, silicone masterbatch (silicone MB), fatty acid metal salt, and second inorganic filler were mixed in the mixing ratios shown in Tables 1 and 2, and the mixture was kneaded with a Banbury mixer heated to 160°C for 15 minutes, and then the pressure lid was pressed. In the opened state, deaeration (dehydration) treatment was performed for 5 minutes. Further, the first inorganic filler was added and kneaded for 5 minutes to obtain a flame-retardant resin composition.
  • the silicone MB is a mixture of polyethylene or polypropylene and silicone gum.
  • the unit of the blending ratio of each blending component is parts by mass.
  • the total blending ratio of the base resin is not 100 parts by mass, but the base resin is a mixture of the base resin in the “Base resin” column and polyethylene or polypropylene in Silicone MB. If the total blending ratio of the base resin in the "Base resin” column and the blending ratio of polyethylene or polypropylene in the silicone MB are summed up, the total is 100 parts by mass.
  • A Base resin (A-1) Polyethylene (PE) Product name "Mirason 50” (Mitsui DuPont Polychemical, low density polyethylene (LDPE)) (A-2) Polypropylene (PP) Product name "Prime Polypro E-150GK” (Block polypropylene copolymer manufactured by Prime Polymer) (A-3) Acid-modified polyolefin (acid-modified PO) Product name "Toughmer MA8510” (Mitsui Chemicals, Inc., maleic acid modified polyolefin)
  • C Fatty acid metal salt (C-1) Magnesium stearate (Mg stearate): ADEKA (C-2) Calcium stearate (Ca stearate): Sakai Chemical Industry
  • D First inorganic filler (divalent metal oxide)
  • D-1 Magnesium oxide product name "StarMug CX-150” (Kamishima Chemical Co., Ltd., fatty acid treated product)
  • D-2) Calcium oxide product name "HAL-G” (manufactured by Yoshizawa Lime Industry Co., Ltd.)
  • E Second inorganic filler (E-1) Calcium carbonate, trade name “NCC#410” (Nitto Koka Kogyo KK, saturated fatty acid-treated calcium carbonate) (E-2) Silicate compound trade name “Burges 2211” (manufactured by Burgess Pigment Co., aminosilane-treated clay)
  • the foaming suppression effect and flame retardancy were evaluated by using the flame-retardant resin compositions of Examples 1 to 10 and Comparative Examples 1 to 7 to make an insulated wire as follows.
  • the insulated wires prepared using the flame-retardant resin compositions of Examples 1 to 10 and Comparative Examples 1 to 7 were subjected to a horizontal combustion test and a 60-degree inclined combustion test as follows.
  • (1) Horizontal Burning Test The insulated wires produced using the flame retardant resin compositions of Examples 1 to 10 and Comparative Examples 1 to 7 were subjected to a horizontal burning test according to JIS C3005. The results are shown in Tables 1 and 2. In Tables 1 and 2, the time from the start of combustion until self-extinguishing was measured after the insulated wire was exposed to flame until it burned. Then, the evaluation of the horizontal combustion test of the insulated wire was performed as follows. The results are shown in Tables 1-2.
  • the flame-retardant resin composition of the present invention can sufficiently suppress foaming during molding and has excellent flame retardancy.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Insulated Conductors (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
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Abstract

L'invention concerne une composition de résine ignifuge comprenant une résine de base, un composé de silicone, un sel métallique d'acide gras, et une première charge inorganique, qui comprend un oxyde d'un métal divalent.
PCT/JP2020/005216 2019-02-19 2020-02-12 Composition de résine ignifuge, fil électrique isolé obtenu à l'aide de celle-ci, câble, câble à fibre optique et objet moulé WO2020170891A1 (fr)

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JPH06212031A (ja) * 1993-01-19 1994-08-02 Sumika Color Kk 樹脂成形物の製造方法、マスターバッチ、および、押出成形用の樹脂組成物
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JP2005029605A (ja) * 2003-07-08 2005-02-03 Japan Polyolefins Co Ltd 難燃樹脂材料およびそれを用いた電線・ケーブル
JP2005029604A (ja) * 2003-07-08 2005-02-03 Japan Polyolefins Co Ltd 軟質難燃樹脂材料およびそれを用いた電線・ケーブル
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JP2006008873A (ja) 2004-06-28 2006-01-12 Fujikura Ltd 難燃性樹脂組成物及びこれを用いた電線・ケーブル
CN204667912U (zh) 2014-12-30 2015-09-23 宁波神雕电缆有限公司 一种耐高温抗拉电缆
CN204516424U (zh) 2015-03-03 2015-07-29 陕西通达电缆制造有限公司 一种耐高温抗拉电动汽车用电缆
CN105047282B (zh) 2015-07-23 2017-05-03 安徽瑞侃电缆科技有限公司 一种耐磨抗撕裂阻燃电缆
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Publication number Priority date Publication date Assignee Title
JPH0255751A (ja) * 1988-08-22 1990-02-26 Nippon Petrochem Co Ltd 傷付き白化を改良した難燃性オレフィン重合体樹脂組成物
JPH06212031A (ja) * 1993-01-19 1994-08-02 Sumika Color Kk 樹脂成形物の製造方法、マスターバッチ、および、押出成形用の樹脂組成物
JP2001214060A (ja) * 2000-02-02 2001-08-07 Tonen Chem Corp ポリアリーレンスルフィド樹脂組成物
JP2005029605A (ja) * 2003-07-08 2005-02-03 Japan Polyolefins Co Ltd 難燃樹脂材料およびそれを用いた電線・ケーブル
JP2005029604A (ja) * 2003-07-08 2005-02-03 Japan Polyolefins Co Ltd 軟質難燃樹脂材料およびそれを用いた電線・ケーブル
JP2008007726A (ja) * 2006-06-30 2008-01-17 Nippon Polyethylene Kk 難燃性樹脂組成物及びそれを用いた電線、ケーブル

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