WO2014175186A1 - 金属表面接着性ゴム組成物、ゴム組成物金属積層体、加硫ゴム製品、及び加硫ゴム製品の製造方法 - Google Patents
金属表面接着性ゴム組成物、ゴム組成物金属積層体、加硫ゴム製品、及び加硫ゴム製品の製造方法 Download PDFInfo
- Publication number
- WO2014175186A1 WO2014175186A1 PCT/JP2014/061067 JP2014061067W WO2014175186A1 WO 2014175186 A1 WO2014175186 A1 WO 2014175186A1 JP 2014061067 W JP2014061067 W JP 2014061067W WO 2014175186 A1 WO2014175186 A1 WO 2014175186A1
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- WIPO (PCT)
- Prior art keywords
- rubber
- rubber composition
- metal surface
- parts
- water
- Prior art date
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 208
- 239000005060 rubber Substances 0.000 title claims abstract description 208
- 239000000203 mixture Substances 0.000 title claims abstract description 106
- 239000000853 adhesive Substances 0.000 title claims abstract description 35
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 title claims description 70
- 239000002184 metal Substances 0.000 title claims description 70
- 239000004636 vulcanized rubber Substances 0.000 title claims description 28
- 238000004519 manufacturing process Methods 0.000 title claims description 27
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 39
- 229920000642 polymer Polymers 0.000 claims abstract description 28
- 150000001993 dienes Chemical class 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000011593 sulfur Substances 0.000 claims description 42
- 229910052717 sulfur Inorganic materials 0.000 claims description 42
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 41
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 30
- 239000003795 chemical substances by application Substances 0.000 claims description 26
- 229910001369 Brass Inorganic materials 0.000 claims description 18
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- 239000004927 clay Substances 0.000 claims description 17
- 239000002250 absorbent Substances 0.000 claims description 13
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- 229920000459 Nitrile rubber Polymers 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 10
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- 229920001084 poly(chloroprene) Polymers 0.000 claims description 8
- 229920000570 polyether Polymers 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 244000043261 Hevea brasiliensis Species 0.000 claims description 6
- 229920003049 isoprene rubber Polymers 0.000 claims description 6
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 229920003052 natural elastomer Polymers 0.000 claims description 6
- 229920001194 natural rubber Polymers 0.000 claims description 6
- 229920002125 Sokalan® Polymers 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 5
- 229920006037 cross link polymer Polymers 0.000 claims description 5
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 5
- 239000001095 magnesium carbonate Substances 0.000 claims description 5
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 5
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 5
- 229920002943 EPDM rubber Polymers 0.000 claims description 4
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- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- 159000000000 sodium salts Chemical class 0.000 claims description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 229910021536 Zeolite Inorganic materials 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
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- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010457 zeolite Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims 4
- 239000010410 layer Substances 0.000 description 144
- 238000004073 vulcanization Methods 0.000 description 76
- 238000000034 method Methods 0.000 description 34
- 238000012360 testing method Methods 0.000 description 15
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- ZFMQKOWCDKKBIF-UHFFFAOYSA-N bis(3,5-difluorophenyl)phosphane Chemical compound FC1=CC(F)=CC(PC=2C=C(F)C=C(F)C=2)=C1 ZFMQKOWCDKKBIF-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
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- 235000021355 Stearic acid Nutrition 0.000 description 3
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- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 3
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- ZNRLMGFXSPUZNR-UHFFFAOYSA-N 2,2,4-trimethyl-1h-quinoline Chemical compound C1=CC=C2C(C)=CC(C)(C)NC2=C1 ZNRLMGFXSPUZNR-UHFFFAOYSA-N 0.000 description 2
- BYLSIPUARIZAHZ-UHFFFAOYSA-N 2,4,6-tris(1-phenylethyl)phenol Chemical compound C=1C(C(C)C=2C=CC=CC=2)=C(O)C(C(C)C=2C=CC=CC=2)=CC=1C(C)C1=CC=CC=C1 BYLSIPUARIZAHZ-UHFFFAOYSA-N 0.000 description 2
- NXQMCAOPTPLPRL-UHFFFAOYSA-N 2-(2-benzoyloxyethoxy)ethyl benzoate Chemical compound C=1C=CC=CC=1C(=O)OCCOCCOC(=O)C1=CC=CC=C1 NXQMCAOPTPLPRL-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- CPGFMWPQXUXQRX-UHFFFAOYSA-N 3-amino-3-(4-fluorophenyl)propanoic acid Chemical compound OC(=O)CC(N)C1=CC=C(F)C=C1 CPGFMWPQXUXQRX-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J201/00—Adhesives based on unspecified macromolecular compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B2038/0052—Other operations not otherwise provided for
- B32B2038/0076—Curing, vulcanising, cross-linking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
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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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/267—Magnesium carbonate
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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
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
Definitions
- hydraulic hoses and high-pressure hoses (hereinafter collectively referred to as hydraulic hoses, etc.) used for various industrial applications, they can be used as hoses without causing liquid leakage even in harsh environments where temperature and pressure fluctuation ranges are large.
- a reinforcing layer braided with a reinforcing yarn and a steel wire is provided between the rubber layer and the rubber layer.
- Such a reinforcing layer is used, for example, by plating the surface with a metal such as brass (brass) in order to enhance the adhesion to the rubber layer.
- Patent Document 1 describes a rubber composition in which a rubber component and a porous inorganic filler are blended and moisture is released during vulcanization to improve the adhesion between the brass-plated reinforcing layer and the rubber layer. ing.
- the present invention provides a rubber composition having good adhesion to a metal-plated reinforcing layer, a rubber composition metal laminate of such a rubber composition and a reinforcing layer, and such a rubber composition metal laminate. It aims at providing the manufacturing method of the vulcanized product which vulcanized, and a vulcanized product.
- the water-absorbent resin is at least one selected from acrylic acid polymer partial sodium salt cross-linked products, modified acrylic cross-linked polymers, and polyether compounds. Is preferred.
- the polyether compound is preferably polyethylene oxide or polyethylene glycol.
- the metal surface adhesive rubber composition of the present invention is a metal surface adhesive rubber composition that adheres to a metal surface, and is 1.0 part by mass or more and 15 parts by mass with respect to 100 parts by mass of a sulfur vulcanizable diene polymer.
- the water is contained in an amount of 0.5 parts by mass or less and an inorganic water retention material as a moisture retention material in an amount of 0.5 parts by mass or more and 20 parts by mass or less.
- the inorganic water retention material is at least one selected from water-swellable clay, silica, aluminum hydroxide, aluminum oxide, calcium carbonate, magnesium carbonate, and zeolite. It is preferable.
- the diene polymer is natural rubber (NR), isoprene rubber (IR), styrene-butadiene rubber (SBR), nitrile-butadiene rubber (NBR), ethylene- It preferably contains at least one selected from propylene-diene rubber (EPDM) and chloroprene rubber (CR).
- NR natural rubber
- IR isoprene rubber
- SBR styrene-butadiene rubber
- NBR nitrile-butadiene rubber
- EPDM propylene-diene rubber
- CR chloroprene rubber
- the metal surface adhesive rubber composition of the present invention preferably further contains a vulcanizing agent.
- the metal surface is preferably a brass-plated metal surface.
- a hydraulic hose or a high pressure hose is preferable.
- the method for producing a vulcanized rubber product according to the present invention includes a lamination step in which a reinforcing layer having a surface plated with brass and at least one rubber layer are laminated to produce a laminate, and the laminate is passed through an oven vulcanizer. And vulcanizing and adhering the rubber layer to the brass-plated reinforcing layer, and the rubber layer is 100 parts by mass of sulfur vulcanizable diene polymer. 1.0 to 15 parts by mass of water and 0.5 to 20 parts by mass of an inorganic water retention material as a moisture retention material, comprising a sulfur-containing vulcanizing agent Is further included.
- the rubber composition according to the present embodiment is a rubber composition that adheres to a brass-plated wire reinforcing layer, and is 1.0 part by mass or more and 15 parts by mass with respect to 100 parts by mass of a sulfur vulcanizable diene polymer. It contains the following water and a water-absorbing resin as a moisture retaining material of 0.5 to 10 parts by mass or an inorganic water retaining material as a moisture retaining material of 0.5 to 20 parts by mass.
- each component constituting the rubber composition will be described.
- the blending amount of the sulfur vulcanizable diene polymer is preferably 20% by mass or more and 70% by mass or less based on the entire rubber composition from the viewpoint of obtaining good rubber mixing processability and rubber appearance.
- polyether compound examples include polyethylene oxide and polyethylene glycol.
- the rubber composition is preferably vulcanized in the presence of sulfur, and preferably further blended with a sulfur-containing vulcanizing agent.
- sulfur-containing vulcanizing agent include sulfur, tetramethyl thiuram disulfide (TMTD), tetraethyl thiuram disulfide (TETD), tetrabutyl thiuram disulfide (TBTD), dipentamethylene thiuram tetrasulfide (DPTT), tetrabenzyl thiuram disulfide, And organic sulfur-containing compounds such as dimorpholine disulfide and alkylphenol disulfide.
- sulfur include powdered sulfur, precipitated sulfur, highly dispersible sulfur, surface-treated sulfur, and insoluble sulfur.
- plasticizer examples include dioctyl phthalate (DOP), dibutyl phthalate (DBP), dioctyl adipate (DOA), isodecyl succinate, diethylene glycol dibenzoate, pentaerythritol ester, butyl oleate, methyl acetylricinoleate, tricresyl phosphate , Trioctyl phosphate, trimellitic acid ester, propylene glycol adipate polyester, butylene glycol adipate polyester, naphthene oil, and the like. These may be used alone or in combination of two or more.
- DOP dioctyl phthalate
- DBP dibutyl phthalate
- DOA dioctyl adipate
- isodecyl succinate diethylene glycol dibenzoate
- pentaerythritol ester butyl oleate
- antioxidants examples include butylhydroxytoluene (BHT) and butylhydroxyanisole (BHA).
- adhesion assistants include triazine thiol compounds (for example, 2,4,6-trimercapto-1,3,5-triazine, 6-butylamino-2,4-dimercapto-1,3,5-triazine). ), Resorcin, cresol, resorcin-formalin latex, monomethylol melamine, monomethylol urea, ethylene maleimide, cobalt naphthenate, cobalt stearate, cobalt versatate, and cobalt dodecanoate. These may be used alone or in combination of two or more.
- the rubber composition can be produced by blending a diene polymer, water, and a moisture retaining material together with a vulcanizing agent and other additives as necessary.
- the rubber composition can be produced, for example, by kneading the diene polymer, water and a moisture retaining material, and, if necessary, a vulcanizing agent and other additives with a Banbury mixer, a kneader or the like.
- the reinforcing layer 3 may be formed as a spiral wire in which a steel wire rod is spirally wound around the inner rubber layer 2 in addition to a wire blade.
- the material forming the reinforcing layer and the knitting method, weaving method, or winding method can be appropriately selected according to the application, for example, according to the pressure resistance. In a hydraulic hose or the like, it is preferable to form a reinforcing layer with a wire blade.
- the surface of the reinforcing layer 3 is metal-plated in order to improve adhesion with the rubber layer.
- This metal plating is a piano wire and a hard steel wire coated with brass (brass).
- brass coating copper is plated on the steel wire and zinc is plated on the copper and a heat diffusion treatment is applied to form the brass coating.
- the rubber composition metal laminate of the rubber composition and the reinforcing layer 3 is a rubber that forms the inner rubber layer 2 and the outer rubber layer 4 by being crosslinked, that is, vulcanized in the presence of a sulfur-containing vulcanizing agent. These molecules are cross-linked by sulfur. By this crosslinking, elasticity and tensile strength are imparted to the inner rubber layer 2 and the outer rubber layer 4, and the metal (copper, zinc) and sulfur constituting the brass coating are bonded at the interface with the reinforcing layer 3. The inner rubber layer 2 and the outer rubber layer 4 are bonded to the reinforcing layer 3.
- Examples of the vulcanization method include a method in which the rubber composition is heat-treated at a predetermined temperature for a predetermined time in the presence of a sulfur-containing vulcanizing agent.
- the vulcanization temperature is preferably 130 ° C. or higher and 180 ° C. or lower.
- the vulcanization time is preferably from 30 minutes to 240 minutes.
- step S101 the hose 6A in which the unvulcanized inner rubber layer 2 is coated on the outer peripheral surface of the mandrel 6 fed from the unwinder 5 by the first extruder 7 is wound around the unwinder 8. .
- step S103 the unvulcanized outer rubber layer 4 is covered with the second extruder 11 on the reinforcing layer 3 of the hose 6B fed out from the winding unwinder 10 to form the hose body 6C. Then, the hose body 6 ⁇ / b> C is wound around the winder 16.
- the vulcanizing device 14 is installed and the vulcanized hose 6E is wound around the winder 16 while the hose body 6C exits the second extruder 11 and is wound around the winder 16.
- the vulcanization step may be provided after the hose body 6C is wound by the winder 16.
- FIG. 4 is a partial cross-sectional view for explaining an example of the layer structure around the mandrel 6 to be fed into the vulcanizer.
- the inner rubber layer 2 is formed around the mandrel 6
- the reinforcing layer 3 is further formed around the inner rubber layer 2
- the outer rubber layer 4 is further formed around the inner rubber layer 4.
- a nylon cloth 18 is wound around the outer rubber layer 4 and heated in this state to proceed with the vulcanization process.
- the vulcanization temperature is preferably 130 ° C. or more and 180 ° C. or less
- the vulcanization time that is, the vulcanization time in the vulcanizer 14 is preferably 30 minutes or more and 240 minutes or less.
- a hydraulic hose with good adhesion between the rubber layer and the reinforcing layer can be obtained.
- Rubber composition In the hose manufacturing process, by forming at least one of the inner rubber layer 2 and the outer rubber layer 4 using a rubber composition, a hydraulic hose having good adhesion to a metal reinforcing layer can be manufactured.
- the rubber composition according to the above-described embodiment can be suitably used for production of rubber products by other conventionally known vulcanization methods.
- vulcanization methods include press vulcanization, steam vulcanization, and hot water vulcanization.
- the manufacturing process by the continuous processing method is exemplified, but the vulcanized rubber product can also be manufactured by a method in which the rubber layer and the reinforcing layer are manufactured in separate processes and then bonded together.
- the hydraulic hose manufactured by the manufacturing method according to the present embodiment can be applied to various uses.
- a use of the hydraulic hose for example, it can be suitably used as an air conditioner hose for automobiles, a power steering hose, a hydraulic hose used for a hydraulic system of a construction vehicle, and the like.
- the adhesiveness between the rubber layer and the reinforcing layer is ensured even in the continuous production method by the oven vulcanization method.
- a good vulcanized rubber product can be provided.
- This vulcanized rubber product can be suitably used for hydraulic hoses, high-pressure hoses and the like.
- NBR trade name “Nancar 3345”, manufactured by Nanteru Chemical Industry Co., Ltd., acrylonitrile content: 34% by mass
- EPDM Trade name “EPT 4070”, manufactured by Mitsui Chemicals, ethylene content 56 mass%, ethylidene norbornene content 8 mass%, Mooney viscosity (ML1 + 4, 125 ° C.) 47
- SBR trade name “Nipol 1502”, manufactured by Nippon Zeon Co., Ltd., emulsion polymerization SBR, bound styrene content 23.5 mass%
- CR Trade name “Denka Chloroprene S-41”, manufactured by Denki Kagaku Kogyo Co., Ltd., non-sulfur modified chloroprene rubber, Mooney viscosity (ML
- Water-absorbing resin 2 Modified acrylic cross-linked polymer, trade name “Aquaric CS” -6S ", Nippon Shokubai Co., Ltd., water absorbent resin 3: polyalkylene oxide, trade name" Aqua Coke TW ", Sumitomo Seika Co., Ltd., water absorbent resin 4: polyethylene glycol, trade name” Macrogol 6000P ", Sanyo Chemical Water-swelling clay manufactured by the company: Trade name “Ben clay MK-101H”; Wet process silica manufactured by Mizusawa Chemical Co., Ltd .: Product name “Nipseal AQ”; Aluminum hydroxide manufactured by Tosoh Silica Co., Ltd .: Product name “Hijilite H-” 42M “, manufactured by SHEPHERD CHEMICAL, magnesium carbonate: trade name” magnesium carbonate TT ", manufactured by Naikai Shigyo Co., Ltd., water: tap water, sulfur: Hosei Chemical Industries, Ltd., vulcanization accelerator 1: Nt-but
- Stearic acid manufactured by Nippon Oil & Fats Co., Ltd./Ozone degradation inhibitor: Trade name “Ozone Non 6C”, Seiko Chemical Co., Ltd./Plasticizer: Dioctyl adipate, Trade name “DIACIZER” “DOA”, manufactured by Mitsubishi Kasei Vinyl Co., Ltd.
- Process oil Aroma-based oil, trade name “A-OMIX”, manufactured by Sankyo Oil Chemical Co., Ltd.
- Vulcanization was carried out under the following four conditions, and the resulting hose-like vulcanized test piece was evaluated for adhesion strength and with rubber.
- gum are the average values of the value measured 10 times, respectively.
- -Vulcanization condition 1 An unvulcanized hose-like specimen prepared using the rubber composition immediately after kneading was vulcanized for 90 minutes in a steam can at 142 ° C (steam vulcanization).
- -Vulcanization condition 2 An unvulcanized hose-like specimen prepared using the rubber composition immediately after kneading was vulcanized in an atmospheric oven at 142 ° C for 135 minutes (oven vulcanization).
- -Vulcanization condition 3 After storing unvulcanized hose-like test pieces for 2 weeks in a dry environment of 25 ° C and 55% relative humidity (% RH), vulcanize for 135 minutes in a 142 ° C atmospheric pressure oven.
- the adhesive strength (kN / m) is the magnitude of force per unit width (m) required for peeling the outer rubber layer from the interface between the outer rubber layer and the reinforcing layer at a peeling speed of 50 mm / min ( kN).
- the term “with rubber” refers to the ratio of the outer rubber layer of the hose-like vulcanized test piece remaining on the surface of the reinforcing layer and the area ratio of the remaining rubber layer to the entire surface area of the reinforcing layer expressed as a percentage. is there.
- the results of measurement with adhesive strength and rubber are shown in Tables 5 to 8.
- the adhesion tests 1 to 4 in Tables 5 to 8 correspond to the test results of the test pieces prepared under the above vulcanization conditions 1 to 4.
- the adhesive strength is 2.5 kN / m or more and the rubber attachment is 60% or more, it can be said that the adhesion between the outer rubber layer and the reinforcing layer is good.
- the compositions of Examples 1 to 22 had good rubber mixing processability, that is, the rubber composition after kneading with a Banbury Kimizer was well organized. Also, the rubber appearance after vulcanization was good with no porosity. Furthermore, the hose-like vulcanized test pieces prepared using the compositions of Examples 1 to 22 each had an adhesive strength with the reinforcing layer of 2.5 kN / m or more, and those with rubber were 60% or more. It was. Further, the hose-like vulcanized test pieces prepared using the compositions of Examples 1 to 22 had an adhesive strength of 2.5 kN / m or more after storage for 4 weeks, and 60% with rubber. That was all.
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Abstract
Description
以下、本実施の形態に係るゴム組成物について説明する。本実施の形態に係るゴム組成物は、ブラスめっきワイヤ補強層と接着するゴム組成物であって、硫黄加硫可能なジエン系重合体100質量部に対し、1.0質量部以上15質量部以下の水と、0.5質量部以上10質量部以下の水分保持材としての吸水性樹脂又は0.5質量部以上20質量部以下の水分保持材としての無機保水材とを含有する。以下、ゴム組成物を構成する各成分について説明する。
硫黄加硫可能なジエン系重合体としては、例えば、天然ゴム(NR)、イソプレンゴム(IR)、スチレン-ブタジエンゴム(SBR)、ニトリル-ブタジエンゴム(NBR)、エチレン-プロピレン-ジエンゴム(EPDM)、及びクロロプレンゴム(CR)が挙げられる。硫黄加硫可能なジエン系重合体は、1種を単独で用いてもよく、2種以上を併用してもよい。
水は、水道水であってもよく、蒸留水、イオン交換水、及び濾過水などの精製水であってもよい。また、フィラー(例えば、カーボンブラック)に吸着した水分であってもよい。水の配合量は、ジエン系重合体100質量部に対し、1.0質量部以上が好ましく、3.0質量部以上がより好ましく、また15質量部以下が好ましく、11質量部以下がより好ましい。水の配合量が上記範囲内であれば、後述する水分保持材と共に組成物中に配合されることによって、長期保管時においても加硫時まで適度の水分を組成物中に安定に保持することができ、水分蒸発が大きなオーブン加硫方式による連続生産によるホース生産においてもゴム層と補強層との接着性を良好に保つことができる。以上を考慮すると、水の配合量は、ジエン系重合体100質量部に対し、1.0質量部以上15質量部以下が好ましく、3.0質量部以上11質量部以下がより好ましい。
水分保持材は、ゴム組成物(コンパウンド)中に水を安定に保持する機能を有するものである。本実施の形態においては、水分保持材としては、吸水性樹脂及び無機保水材を用いることができる。これらは単独で用いてもよく、2種以上を併用してもよい。
一般的に、吸水性樹脂とは、樹脂1gあたり10g以上の吸水量を呈するものをいう。吸水性樹脂としては、親水性が高く、ポア(孔)の中に水を取り込める三次元網目構造を持つ多孔質材料が好ましい。吸水性樹脂としては、例えば、アクリル酸重合体部分ナトリウム塩架橋物、変性アクリル系架橋重合体、及びポリエーテル化合物からなる群から選択された少なくとも1種が好ましい。
無機保水材は、例えば、ポア(孔)の中に水を取り込める多孔質材料が好ましい。無機保水材としては、例えば、水膨潤性粘土、シリカ(ホワイトカーボン)、水酸化アルミニウム、酸化アルミニウム、炭酸カルシウム、炭酸マグネシウム、及びゼオライトなどが挙げられる。シリカとしては、例えば、結晶性シリカ、沈殿シリカ、非晶質シリカ(例えば、高温処理シリカ)、ヒュームドシリカ、焼成シリカ、沈降シリカ、粉砕シリカ、及び溶融シリカなどが挙げられる。これらの中でも、水膨潤性粘土、及びシリカが好ましく、水膨潤性粘土がより好ましい。無機保水材は、単独で用いてもよく、また2種以上を併用してもよい。
ゴム組成物は、硫黄の存在下で加硫されることが好ましく、含硫黄加硫剤を更に配合してなることが好ましい。含硫黄加硫剤としては、例えば、硫黄、テトラメチルチウラムジスルフィド(TMTD)、テトラエチルチウラムジスルフィド(TETD)、テトラブチルチウラムジスルフィド(TBTD)、ジペンタメチレンチウラムテトラスルフィド(DPTT)、テトラベンジルチウラムジスルフィド、及びジモルフォリンジサルファイド、アルキルフェノールジサルファイドなどの有機含硫黄化合物を挙げることができる。硫黄としては、例えば、粉末硫黄、沈降性硫黄、高分散性硫黄、表面処理硫黄、及び不溶性硫黄などを挙げることができる。
また、ゴム組成物は、本発明の効果を奏する範囲で、必要に応じて、その他の添加剤を含有することができる。その他の添加剤としては、例えば、充填材、可塑剤、軟化剤、老化防止剤、有機系活性剤、酸化防止剤、帯電防止剤、難燃剤、架橋促進助剤、加硫遅延剤、及び接着助剤が挙げられる。
本実施の形態に係るゴム組成物の製造方法としては、特に限定されず、従来公知の方法を用いることができる。ゴム組成物は、ジエン系重合体と、水と、水分保持材とを、必要に応じて加硫剤及びその他の添加剤とともに配合させることにより製造することができる。ゴム組成物は、例えば、上記ジエン系重合体と、水と水分保持材と、必要に応じて加硫剤及びその他添加剤とを、バンバリーミキサー、ニーダーなどで混練することにより製造できる。
本実施の形態に係るゴム組成物金属積層体は、上記ゴム組成物と表面を金属めっきしたワイヤ補強層との積層体である。図1にゴム組成物金属積層体をホースとして具現した場合の基本構造を示す。図1は、本実施の形態に係る油圧ホースの一例を示す一部破断斜視図である。図1に示すように、ホース1は、内部を流体が通過する内側ゴム層2と、内側ゴム層2の外側周囲に設けられる補強層3と、補強層3の外側周囲に設けられる外側ゴム層4とを有している。内側ゴム層2及び/又は外側ゴム層4は、上記実施の形態に係るゴム組成物で構成されたゴム層である。補強層3は、鋼線材が編みこまれたワイヤブレードであり、ワイヤの表面がブラスめっきされている。補強層3は、内側ゴム層2と外側ゴム層4との間に挟みこまれるように配設されている。内側ゴム層2、補強層3、及び外側ゴム層4は、内側ゴム層2及び外側ゴム4の加硫により接着固定される。
上述したように、内側ゴム層2及び外側ゴム層4の少なくとも一方は、上記実施の形態に係るゴム組成物で構成される。ホースの耐候性の観点から、少なくとも外側ゴム層4を上記実施の形態に係るゴム組成物を用いて形成するのが好ましい。
補強層3は、内側ゴム層2と外側ゴム層4との間に、強度保持の観点から設けられる層である。補強層3は、鋼線材ワイヤを編み上げたワイヤブレードにより形成される。
上記ゴム組成物と補強層3とのゴム組成物金属積層体は、硫黄含有加硫剤の存在下で架橋、すなわち加硫されることによって、内側ゴム層2及び外側ゴム層4を形成するゴムの分子間が硫黄によって架橋される。この架橋により、内側ゴム層2及び外側ゴム層4に弾性と引っ張り強さが付与されると共に、補強層3との界面でブラスコーティングを構成する金属(銅、亜鉛)と硫黄とが結合して内側ゴム層2及び外側ゴム層4と補強層3とが接着される。
以下に、本実施の形態に係る加硫ゴム製品の製造方法について説明する。ここでは加硫ゴム製品として油圧ホースを製造する場合を例として説明する。
油圧ホース1は、図1に示したように、内側ゴム層2の外周面に補強層3と外側ゴム層4とを順に積層した構造を有している。なお、図1に示した例では、補強層3を一層としているが、層間に中間ゴム層が配置された複数の補強層3を設けるようにしてもよい。なお、上述したように、外側ゴム層4は、上記実施の形態に係るゴム組成物で形成することが好ましく、内側ゴム層2は、耐油性に優れたアクリロニトリルブタジエンゴム(NBR)を主成分とするゴム組成物を用いて形成することが好ましい。
図2に示すように、ゴムホースは、マンドレル6の外周面に内側ゴム層2を形成するゴム材の押出し工程(ステップS101)、補強層3の編上げ工程(ステップS102)、外面ゴム層4の押出し・加硫工程(ステップS103)、及び、マンドレル6の抜出し工程(ステップS104)により得られる。製造されたゴムホースは、水圧検査、さらに検査巻取り工程を経て、梱包、出荷される。
図3に示すように、第2押出機11を出たホース本体6Cはラッピング装置13によって周囲にナイロン布18が巻き回される。ナイロン布18で包囲されたホース本体6Cは、加硫装置14内に搬入される。加硫装置14は、熱風19により加硫を進行させる熱風循環型の連続加硫装置である。この加硫方式は、オーブン加硫方式である。
<ゴム組成物>
ホース製造工程では、内側ゴム層2及び外側ゴム層4の少なくとも一方をゴム組成物を用いて形成することにより、金属製の補強層との接着性が良好な油圧ホースを製造することができる。
(実施例1~22)
表1及び表2に示される配合比の原料をバンバリーキミサーで混練し、実施例1~22に係るゴム組成物を得た。なお、表中の数値の単位は特に断りのある場合を除きジエン系重合体の合計質量を100とした場合の質量部で表す。
表3及び表4に示される配合比の原料をバンバリーキミサーで混練し、比較例1~14に係るゴム組成物を得た。なお、表中の数値の単位は特に断りのある場合を除きジエン系重合体の合計質量を100とした場合の質量部で表す。
・NBR:商品名「Nancar 3345」、南帝化学工業社製、アクリロニトリル含有量34質量%、ムーニー粘度(ML1+4,100℃)45
・EPDM:商品名「EPT 4070」、三井化学社製、エチレン含有量56質量%、エチリデンノルボルネン含有量8質量%、ムーニー粘度(ML1+4,125℃)47
・SBR:商品名「Nipol 1502」、日本ゼオン社製、乳化重合SBR、結合スチレン含有量23.5質量%、ムーニー粘度(ML1+4,100℃)52
・CR:商品名「デンカクロロプレンS-41」、電気化学工業社製、非硫黄変性クロロプレンゴム、ムーニー粘度(ML1+4,100℃)48
・吸水性樹脂1:アクリル酸重合物ナトリウム中和塩架橋物、商品名「アクアリックCA-K4」、日本触媒社製
・吸水性樹脂2:変性アクリル系架橋重合体、商品名「アクアリックCS-6S」、日本触媒社製
・吸水性樹脂3:ポリアルキレンオキサイド、商品名「アクアコークTW」、住友精化社製
・吸水性樹脂4:ポリエチレングリコール、商品名「マクロゴール6000P」、三洋化成社製
・水膨潤性粘土:商品名「ベンクレイMK-101H」、水澤化学工業社製
・湿式法シリカ:商品名「ニップシールAQ」、東ソーシリカ社製
・水酸化アルミニウム:商品名「ハイジライトH-42M」、SHEPHERD CHEMICAL社製
・炭酸マグネシウム:商品名「炭酸マグネシウムTT」、ナイカイ塩業社製
・水:水道水
・硫黄:細井化学工業社製
・加硫促進剤1:N-t-ブチルベンゾチアゾール-2-スルフェンアミド、商品名「ノクセラーNS-P」、大内新興化学工業社製
・加硫促進剤2:テトラメチルチウラムモノスルフィド、商品名「サンセラーTS-G」、三新化学工業社製
・加硫促進剤3:ジフェニルグアニジン、商品名「ソクシノールD-G」、住友化学社製
・スコーチ防止剤:N-シクロヘキシルチオフタルイミド、FLEXSYS社製
・ISAF級カーボンブラック:商品名「ショウブラックN220」、昭和キャボット社製
・FEF級カーボンブラック:商品名「HTC#100」、新日化カーボン社製
・ハードクレー:商品名「Suprex Clay」、ケンタッキーテネシークレイカンパニー社製
・酸化亜鉛3種:正同化学工業社製
・酸化マグネシウム:商品名「キョーワマグ150」、協和化学工業社製
・ステアリン酸:日本油脂社製
・オゾン劣化防止剤:商品名「オゾンノン6C」、精工化学社製
・可塑剤:ジオクチルアジペート、商品名「DIACIZER DOA」、三菱化成ビニル社製
・プロセスオイル:アロマ系オイル、商品名「A-OMIX」、三共油化工業社製
実施例1~22及び比較例1~14で得られた各ゴム組成物を外側ゴム層として用いて、ブラスめっきワイヤブレードで作製した補強層と接着させて、ホース状試験片を以下のように作製した。
・加硫条件1:混練直後のゴム組成物を使用して作製した未加硫ホース状試験片を142℃のスチーム缶内で90分間加硫を行った(スチーム加硫)。
・加硫条件2:混練直後のゴム組成物を使用して作製した未加硫ホース状試験片を142℃の常圧オーブン内で135分間加硫を行った(オーブン加硫)。
・加硫条件3:25℃、55%相対湿度(%RH)の乾燥環境下で未加硫ホース状試験片を2週間保管した後、142℃の常圧オーブン内で135分間加硫を行った(オーブン加硫)。
・加硫条件4:25℃、30%相対湿度(%RH)の乾燥環境下で未加硫ホース状試験片を4週間保管した後、142℃の常圧オーブン内で135分間加硫を行った(オーブン加硫)。
上記のごとき加硫条件で得られた各ホース状加硫試験片について、接着強度(kN/m)とゴム付き(%)とを評価した。ここで、接着強度(kN/m)とは、外側ゴム層と補強層との界面から剥離速度50mm/分で外側ゴム層を剥離するときに要する単位幅(m)あたりの力の大きさ(kN)である。ここで、ゴム付きとは、ホース状加硫試験片の外側ゴム層が補強層表面に残留している割合であって、補強層表面積全体に対する残留ゴム層の面積比率を百分率で表したものである。
○:まとまりが良い。
△:まとまりは良くも悪くもない。
×:まとまりが悪い。
○:窪み状の欠陥(ポーラス)なし。
×:窪み状の欠陥(ポーラス)あり。
2 内側ゴム層
3 補強層
4 外側ゴム層
6 マンドレル
6C ホース本体
14 加硫装置
18 ナイロン布
Claims (16)
- 金属表面と接着する金属表面接着性ゴム組成物であって、
硫黄加硫可能なジエン系重合体100質量部に対し、
1.0質量部以上15質量部以下の水と、
0.5質量部以上10質量部以下の水分保持材としての吸水性樹脂と、
を含む金属表面接着性ゴム組成物。 - 前記吸水性樹脂が、アクリル酸重合体部分ナトリウム塩架橋物、変性アクリル系架橋重合体、及びポリエーテル化合物から選択される少なくとも1種である請求項1に記載の金属表面接着性ゴム組成物。
- 前記ポリエーテル化合物が、ポリエチレンオキサイド又はポリエチレングリコールである請求項2に記載の金属表面接着性ゴム組成物。
- 金属表面と接着する金属表面接着性ゴム組成物であって、
硫黄加硫可能なジエン系重合体100質量部に対し、
1.0質量部以上15質量部以下の水と、
0.5質量部以上20質量部以下の水分保持材としての無機保水材と、
を含む金属表面接着性ゴム組成物。 - 前記無機保水材が、水膨潤性粘土、シリカ、水酸化アルミニウム、酸化アルミニウム、炭酸カルシウム、炭酸マグネシウム、及びゼオライトから選択される少なくとも1種である請求項4に記載の金属表面接着性ゴム組成物。
- 前記金属表面がブラスめっきされた金属表面である請求項1から請求項5のいずれか1項に記載の金属表面接着性ゴム組成物。
- 前記ジエン系重合体が、天然ゴム(NR)、イソプレンゴム(IR)、スチレン-ブタジエンゴム(SBR)、ニトリル-ブタジエンゴム(NBR)、エチレン-プロピレン-ジエンゴム(EPDM)、及びクロロプレンゴム(CR)から選択される少なくとも1種を含む請求項1から請求項6のいずれか1項に記載の金属表面接着性ゴム組成物。
- 加硫剤を更に含む請求項1から請求項7のいずれか1項に記載の金属表面接着性ゴム組成物。
- 請求項1から請求項8のいずれか1項に記載の金属表面接着性ゴム組成物からなるゴム層と、金属表面を有する補強層とが積層されたゴム組成物金属積層体。
- 前記金属表面がブラスめっきされた金属表面である請求項9に記載のゴム組成物金属積層体。
- 前記補強層がワイヤを編み上げた編組構造又はスパイラル構造を有する請求項10に記載のゴム組成物金属積層体。
- 請求項9から請求項11のいずれか1項に記載のゴム組成物金属積層体の前記ゴム層が硫黄含有加硫剤の存在下で加硫され、前記補強層と接着された加硫ゴム製品。
- 油圧ホース又は高圧ホースである請求項12に記載の加硫ゴム製品。
- 前記油圧ホース又は前記高圧ホースは、オーブン加硫装置内を通過することにより加硫された請求項13に記載の加硫ゴム製品。
- 表面がブラスめっきされた補強層と少なくとも一のゴム層とを積層し積層体を作製する積層工程と、
オーブン加硫装置内に前記積層体を通過させ、前記ゴム層を加硫させて、前記ブラスめっきされた補強層と接着させる加硫接着工程と、を有し、
前記ゴム層が、
硫黄加硫可能なジエン系重合体100質量部に対し、
1.0質量部以上15質量部以下の水と、
0.5質量部以上10質量部以下の水分保持材としての吸水性樹脂と、
を含むゴム組成物であって、
硫黄含有加硫剤を更に含む加硫ゴム製品の製造方法。 - 表面がブラスめっきされた補強層と少なくとも一のゴム層とを積層し積層体を作製する積層工程と、
オーブン加硫装置内に前記積層体を通過させ、前記ゴム層を加硫させて、前記ブラスめっきされた補強層と接着させる加硫接着工程と、を有し、
前記ゴム層が、
硫黄加硫可能なジエン系重合体100質量部に対し、
1.0質量部以上15質量部以下の水と、
0.5質量部以上20質量部以下の水分保持材としての無機保水材と、
を含むゴム組成物であって、
硫黄含有加硫剤を更に含む加硫ゴム製品の製造方法。
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Also Published As
Publication number | Publication date |
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TWI627245B (zh) | 2018-06-21 |
US10047251B2 (en) | 2018-08-14 |
CN105143333B (zh) | 2017-12-26 |
CN105143333A (zh) | 2015-12-09 |
TW201504374A (zh) | 2015-02-01 |
US20160096981A1 (en) | 2016-04-07 |
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