WO2014092191A1 - ゴム組成物及びコンベヤベルト - Google Patents

ゴム組成物及びコンベヤベルト Download PDF

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WO2014092191A1
WO2014092191A1 PCT/JP2013/083526 JP2013083526W WO2014092191A1 WO 2014092191 A1 WO2014092191 A1 WO 2014092191A1 JP 2013083526 W JP2013083526 W JP 2013083526W WO 2014092191 A1 WO2014092191 A1 WO 2014092191A1
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Prior art keywords
mass
rubber
parts
rosin
content
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PCT/JP2013/083526
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English (en)
French (fr)
Japanese (ja)
Inventor
英博 笹熊
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横浜ゴム株式会社
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Priority to CN201380064539.7A priority Critical patent/CN104837911B/zh
Priority to RU2015122455/05A priority patent/RU2578145C1/ru
Priority to CA2894792A priority patent/CA2894792C/en
Publication of WO2014092191A1 publication Critical patent/WO2014092191A1/ja

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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
    • C08K5/00—Use of organic ingredients
    • C08K5/02—Halogenated hydrocarbons
    • 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
    • C08K5/092—Polycarboxylic acids
    • 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
    • C08L11/00—Compositions of homopolymers or copolymers of chloroprene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L7/00—Compositions of natural rubber
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L93/00—Compositions of natural resins; Compositions of derivatives thereof
    • C08L93/04—Rosin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G1/00—Driving-belts
    • F16G1/06—Driving-belts made of rubber
    • F16G1/08—Driving-belts made of rubber with reinforcement bonded by the rubber
    • F16G1/12—Driving-belts made of rubber with reinforcement bonded by the rubber with metal reinforcement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/04—V-belts, i.e. belts of tapered cross-section made of rubber
    • F16G5/06—V-belts, i.e. belts of tapered cross-section made of rubber with reinforcement bonded by the rubber
    • F16G5/10—V-belts, i.e. belts of tapered cross-section made of rubber with reinforcement bonded by the rubber with metal reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • B65G15/32—Belts or like endless load-carriers made of rubber or plastics
    • B65G15/38—Belts or like endless load-carriers made of rubber or plastics with flame-resistant layers, e.g. of asbestos, glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
    • B65G2207/22—Heat or fire protection

Definitions

  • the present invention relates to a rubber composition and a conveyor belt having flame resistance and cold resistance.
  • a rubber composition containing an organic cobalt salt and rosin has been used to bond a galvanized steel cord and a rubber composition (see, for example, Patent Document 1).
  • a flame retardant such as a halogen compound is added without using a halogen-based rubber, and chloroprene rubber (CR), which is a flame retardant rubber, is 100 parts by mass. It is known to do (see, for example, Patent Document 2).
  • Patent Document 1 describes a rubber composition having excellent adhesion to a galvanized metal material.
  • the rubber composition described in Patent Document 1 contains a predetermined amount of rosin or a rosin derivative, an organic cobalt salt, and an organic chlorine compound with respect to 100 parts by weight of sulfur vulcanizable rubber.
  • Patent Document 2 describes a chloroprene-based adhesive rubber composition excellent in flame retardancy and heat resistance.
  • the adhesive rubber composition described in Patent Document 2 is obtained by blending a predetermined amount of organic acid cobalt salt, zinc oxide, sulfur and 2-mercaptoimidazoline with 100 parts by weight of chloroprene rubber.
  • the rubber composition added with a flame retardant without using the halogen-based rubber described in Patent Document 1 can maintain the adhesiveness but does not sufficiently consider cold resistance and flame retardancy.
  • blended 100 mass parts of chloroprene rubber of patent document 2 although adhesiveness is maintained, cold resistance is not considered and there exists a possibility that it cannot be used in a cold region. Therefore, it is insufficient for use in a cold region or a use environment where flame retardancy is required, and there is room for further improvement.
  • an object of the present invention is to provide a rubber composition and a conveyor belt that are excellent in adhesion to a galvanized steel cord and have improved flame resistance and cold resistance.
  • the present invention includes the following (1) to (3).
  • a rubber component containing butadiene rubber, chloroprene rubber and natural rubber, an organic cobalt salt, a rosin or rosin derivative, and an organic chlorine compound The content of the butadiene rubber is 5 parts by mass or more and 20 parts by mass or less in 100 parts by mass of the rubber component.
  • the content of the chloroprene rubber is 20 parts by mass or more and 65 parts by mass or less in 100 parts by mass of the rubber component.
  • the content of the organic cobalt salt is 0.2 parts by mass or more and 1.0 part by mass or less with respect to 100 parts by mass of the rubber component when the mass of the organic cobalt salt is converted to cobalt.
  • the content of the rosin or rosin derivative is 2 parts by mass or more and 9 parts by mass or less with respect to 100 parts by mass of the rubber component.
  • Content of the said organic chlorine compound is 5 to 35 mass parts with respect to 100 mass parts of said rubber components,
  • the rubber composition characterized by the above-mentioned.
  • a conveyor belt comprising a composite obtained by vulcanizing a rubber composition containing the rubber composition according to (1) or (2) above and a galvanized steel cord.
  • the present invention is excellent in adhesiveness with a galvanized steel cord, and flame retardancy and cold resistance can be improved.
  • FIG. 1 is a cross-sectional perspective view of a conveyor belt according to an embodiment of the present invention.
  • a rubber composition according to the present embodiment includes a rubber component including butadiene rubber (BR), chloroprene rubber (CR), and natural rubber (NR), and organic cobalt. Salt, rosin or rosin derivative, and organochlorine compound.
  • rubber component As the rubber component contained in the composition of the present embodiment, rubber capable of sulfur vulcanization is used.
  • the rubber that can be sulfur vulcanized is a rubber that can be vulcanized using sulfur, such as natural rubber, synthetic rubber, or a mixture thereof, and examples thereof include diene rubber.
  • Specific examples of the diene rubber include natural rubber, isoprene rubber (IR), various butadiene rubbers (BR), 1,2-butadiene rubber, various styrene-butadiene copolymer rubbers (SBR), and acrylonitrile- Examples thereof include butadiene copolymer rubber (NBR), chloroprene rubber, butyl rubber (IIR), and ethylene-propylene-diene rubber (EPDM). These rubber components can be used alone or in combination of two or more.
  • butadiene rubber, chloroprene rubber, and natural rubber are included because of excellent adhesion, flame retardancy, and cold resistance.
  • the butadiene rubber preferably has a mass average molecular weight (Mw) of 400,000 or more, and more preferably 450,000 or more. When the weight average molecular weight is within this range, the tensile strength and elongation at break in the rubber composition after vulcanization are further improved.
  • the mass average molecular weight is a mass average molecular weight (polystyrene conversion) measured by gel permeation chromatography (GPC), and tetrahydrofuran (THF) is preferably used as a solvent for the measurement.
  • GPC gel permeation chromatography
  • THF tetrahydrofuran
  • a commercially available product can be used as the butadiene rubber, and specific examples thereof include Nipol BR1220 and Nipol BR1250H manufactured by Nippon Zeon Co., Ltd.
  • chloroprene rubber examples include sulfur-modified (G) type, non-sulfur-modified (W) type, and high crystal type, and various known chloroprene rubbers can be used.
  • G sulfur-modified
  • W non-sulfur-modified
  • high crystal type examples of various known chloroprene rubbers can be used.
  • chloroprene rubber commercially available products can be used. Specific examples include Neoprene GRT and Neoprene WRT manufactured by Showa Denko DuPont, Denka Chloroprene PM-40 and S-41 manufactured by Denki Kagaku Kogyo Co., Ltd. Can be mentioned.
  • Natural rubber is a polymer having a structure in which cis-1,4-polyisoprene is bonded to the head and tail, and generally used natural rubber can be used.
  • natural rubber commercially available products can be used, and specific examples include TSR-20, RSS # 3, and the like.
  • the content of butadiene rubber in the rubber component is 5 parts by mass or more and 20 parts by mass or less, and preferably 5 parts by mass or more and 15 parts by mass or less in 100 parts by mass of the rubber component of the present embodiment.
  • content of the chloroprene rubber in the said rubber component is 20 to 65 mass parts in 100 mass parts of rubber components of this embodiment, Preferably it is 25 to 60 mass parts.
  • the content of the natural rubber in the rubber component is the remaining amount obtained by subtracting the total content of the butadiene rubber and chloroprene rubber from 100 parts by mass of the rubber component of the present embodiment, that is, 15 parts by mass or more. 75 parts by mass or less, preferably 25 parts by mass or more and 70 parts by mass or less.
  • the organic cobalt salt contained in the composition of the present embodiment is not particularly limited as long as it is generally used as a liquid phase oxidation catalyst and is conventionally known.
  • the organic cobalt salt is a method in which a cobalt acetate solution is added to an alkali soap solution of the corresponding organic acid and subjected to metathesis precipitation, a method in which the organic acid and cobalt (II) oxide are heated and melted, or a cobalt sulfate or cobalt nitrate solution in the organic acid benzine solution. It can obtain by the method of adding the aqueous solution of this.
  • organic cobalt salt for example, cobalt naphthenate, cobalt stearate, cobalt neodecanoate, cobalt orthoborate, cobalt octylate, cobalt versatate, cobalt palmitate, cobalt rosinate, cobalt propionate, or A cobalt boron complex etc. can be mentioned.
  • cobalt naphthenate, cobalt neodecanoate, cobalt boron complex, and the like because the adhesiveness is further improved.
  • Commercially available products can be used as the organic cobalt salt, and specific examples include 10% cobalt naphthenate manufactured by Dainippon Ink & Chemicals, Inc.
  • the content of the organic cobalt salt is 0.2 parts by mass or more and 1.0 part by mass or less, preferably 0.3 parts by mass with respect to 100 parts by mass of the rubber component when the mass of the organic cobalt salt is converted to cobalt.
  • the amount is 0.7 parts by mass or less.
  • the content of the organic cobalt salt is within the above range, the adhesiveness (with rubber) to the galvanized steel cord becomes good.
  • the content of the organic cobalt salt is less than 0.2 parts by mass, the adhesion to the galvanized steel cord and the moisture-resistant adhesion deteriorate, and when it exceeds 1.0 parts by mass, the aging resistance of the rubber composition deteriorates. Therefore, it is not preferable.
  • the content of the organic cobalt salt is preferably 0.2 parts by mass or more and 1.0 part by mass or less from the viewpoint of achieving both adhesiveness and moisture-resistant adhesion and rubber physical properties.
  • the rosin contained in the composition of this embodiment is a kind of natural resin also called pine resin.
  • rosin derivatives include gum rosin, wood rosin extracted from pine wood with a solvent, tall oil rosin, polymers of these rosins, disproportionated rosin, maleated rosin, aldehyde-modified rosin, hydrogenated rosin, and their rosin derivatives. Examples include processed products.
  • As the rosin and rosin derivative known ones generally used as a tackifier can be used.
  • As the rosin or rosin derivative commercially available products can be used. Specifically, for example, gum rosin and wood rosin manufactured by Arakawa Chemical Industries, Ltd., tall oil rosin manufactured by Harima Kasei Kogyo Co., Ltd., hydrogenated by Hercules Examples include rosin.
  • the content of rosin or rosin derivative is 2 parts by mass or more and 9 parts by mass or less, and preferably 3 parts by mass or more and 7 parts by mass or less with respect to 100 parts by mass of the rubber component.
  • the content of the rosin or rosin derivative is within the above range, the adhesiveness (with rubber) to the galvanized steel cord is good, the roll processability is also good, and the cold resistance is improved.
  • the content of rosin or rosin derivative is less than 2 parts by mass, the moisture resistance adhesion between the rubber composition and the galvanized steel cord is not sufficient, and when it exceeds 9 parts by mass, the tackiness of the rubber composition increases and roll processing is performed. Sex worsens.
  • the content of the rosin or rosin derivative is preferably 2 parts by mass or more and 9 parts by mass or less from the viewpoint of achieving both moisture-resistant adhesion and practical workability.
  • the composition of the present embodiment contains rosin or a rosin derivative, it is excellent in adhesion to a galvanized steel cord and moisture-resistant adhesion.
  • rosin and rosin derivatives are generally used as tackifiers, and by containing the rosin or rosin derivative, the composition of this embodiment has improved tackiness and adhesiveness to rolls. Rises at the same time. If the adhesiveness to the roll is too high, roll processability deteriorates.
  • the roll processability refers to the tackiness and processability of the unvulcanized rubber composition fabric, and has the property of being easily formed into a sheet during processing (especially during roll rolling in a factory). Show.
  • an organic chlorine compound generally used as a chlorine-based flame retardant can be used.
  • a linear organic chlorine compound is preferably exemplified.
  • Specific examples of the linear organic chlorine compound include chlorinated paraffin and chlorinated polyethylene.
  • commercially available products can be used.
  • chlorinated paraffins having a chlorine content of 40% to 80% are commercially available, and any of them can be used.
  • Examples of commercially available products include Toyoparax (chlorine content 70% by mass, manufactured by Tosoh Corporation), Empara 70S (chlorine content 70% by mass, manufactured by DOVER CHEMICAL COMPANY), and the like.
  • the content of the organic chlorine compound is 5 parts by mass or more and 35 parts by mass or less, and preferably 5 parts by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the rubber component.
  • the content of the organic chlorine compound is within the above range, the flame retardancy of the composition of the present embodiment is improved.
  • the content of the organic chlorine compound is less than 5 parts by mass, the adhesion is not stable, and when it exceeds 35 parts by mass, the composition of the present embodiment becomes excessively sticky and processing becomes difficult.
  • the content of the organic chlorine compound is preferably 5 parts by mass or more and 35 parts by mass or less.
  • the composition of the present embodiment has good adhesion, particularly initial adhesion, by containing an organic chlorine compound. Furthermore, since the organochlorine compound imparts flame retardancy, the composition of this embodiment is excellent in both flame retardancy and cold resistance because it contains the organochlorine compound in an amount in the above range. For this reason, the steel cord conveyor belt manufactured using the composition of the present embodiment to be described later sufficiently satisfies the flame retardancy required for the steel cord conveyor belt used in the underground or the like, and in a cold region. Use is also possible.
  • the composition of the present embodiment contains a predetermined amount of butadiene rubber, chloroprene rubber, and natural rubber in 100 parts by mass of the rubber component as essential components, and further contains an organic cobalt salt and rosin or rosin.
  • a predetermined amount of each of the derivative and the organochlorine compound it is possible to improve the flame retardancy and cold resistance as well as excellent adhesion to the galvanized steel cord.
  • composition of the present embodiment includes the above six essential components, and the numerical value A calculated by the following formula (1) with respect to 100 parts by mass of the rubber component is 83 parts by mass or less. preferable.
  • the numerical value A calculated by the above formula (1) for the three components of chloroprene rubber, organochlorine compound and rosin is 83 parts by mass or less, preferably 50 parts by mass or more and 83 parts by mass or less, more preferably 60 parts by mass. Part to 83 parts by mass.
  • the composition of this embodiment is galvanized by setting the numerical value A calculated by the above formula (1) for the three components of chloroprene rubber, organochlorine compound, and rosin to a predetermined blending amount that satisfies 83 parts by mass or less. In addition to excellent adhesion to steel cords, it is possible to improve flame retardancy and cold resistance, and to improve roll processability.
  • the composition according to the present embodiment includes a phenol resin, a carboxyl group-containing liquid isoprene rubber (an isoprene polymer rubber produced by a solution polymerization method) in addition to the essential components described above within a range not impairing the object of the present invention. Etc.) may be included.
  • various additives can be contained as required. Additives include, for example, fillers such as carbon black; vulcanization accelerators such as zinc white and stearic acid; vulcanization accelerators such as dibenzothiazyl disulfide; aging such as amines, phenols and waxes Inhibitors; sulfur; vegetable oil-based or mineral oil-based softeners; Two or more of these may be contained.
  • the additives and the like can be kneaded by a general method to obtain a composition, which can be used for vulcanization or crosslinking.
  • the blending amounts of these additives can be conventional conventional blending amounts as long as the object of the present embodiment is not violated.
  • the method for producing the composition of the present embodiment includes, for example, 5 parts by mass or more and 20 parts by mass or less of butadiene rubber and 20 parts by mass or more and 65 parts by mass or less of chloroprene rubber in 100 parts by mass of the rubber component described above.
  • the rubber composition obtained above can be made into a composite of rubber and galvanized steel cord by being in close contact with the galvanized steel cord and sulfur vulcanized at a predetermined temperature for a predetermined time.
  • a surface-treated steel cord galvanized can be used as the steel cord to be bonded to the above rubber composition.
  • the plating method electroplating, hot dipping, etc. can be applied.
  • a steel cord used for a conveyor belt or the like it is preferable to use a galvanized steel cord from the viewpoint of rust prevention and durability.
  • the strand diameter, the cord diameter, and the like of the galvanized steel cord can be appropriately selected according to their use when bonded to the rubber composition of the present embodiment to form a composite.
  • the rubber composition is adhered to the galvanized steel cord at a predetermined thickness, and press vulcanization is performed at 150 ° C. for 30 minutes, It can be a composite of a rubber composition and a galvanized steel cord. Since the composition of this embodiment is excellent in adhesion with a galvanized steel cord, it can be used for a material using a galvanized steel cord as a reinforcing material. Moreover, it is applicable not only to a steel cord but to a galvanized metal material.
  • composition of this embodiment has the above-described excellent characteristics, it is suitably used for the production of steel cord conveyor belts. Besides this, the production of hoses, crawler belts, marine hoses, tires, etc. Can be suitably used.
  • FIG. 1 is a cross-sectional perspective view of a conveyor belt according to the present embodiment (hereinafter referred to as “conveyor belt of the present embodiment”).
  • the conveyor belt 10 includes cover rubber layers 11 a and 11 b, a coat rubber layer 12, and a galvanized steel cord 13.
  • the conveyor belt 10 is, for example, a conveyor belt 10 in which a galvanized steel cord 13 covered with a coat rubber layer 12 is disposed between cover rubber layers 11a and 11b as a core body, and the coat rubber layer 12 is described above.
  • the surface layer of the conveyor belt 10 is composed of two layers of cover rubber layers 11a and 11b, and there is a coat rubber layer 12 in which a galvanized steel cord 13 is disposed as a core between the two layers of the cover rubber layers 11a and 11b.
  • the coat rubber layer 12 is obtained by forming the rubber composition of the present embodiment into a sheet shape using a roll or the like, and then setting and vulcanizing the galvanized steel cord 13 as a core body. Then, the rubber composition and the surface of the galvanized steel cord 13 are firmly bonded to form the coated rubber layer 12.
  • the coat rubber layer 12 serves as an adhesive layer between the galvanized steel cord 13 and the cover rubber 11, and also serves as a buffer material for the galvanized steel cord 13.
  • a rubber composition containing a component excellent in flame resistance, heat resistance, cold resistance, oil resistance, abrasion resistance, or weather resistance is used depending on the application of the conveyor belt 10. Is preferred.
  • the conveyor belt 10 of the present embodiment Since the conveyor belt 10 of the present embodiment has the above-described configuration, it has excellent adhesiveness with the galvanized steel cord 13 and can improve flame resistance and cold resistance. Can have long-term reliability. In addition, since the conveyor belt 10 of the present embodiment has cold resistance and flame retardancy, it can be used even in cold regions where the outside air temperature is about -30 ° C., and can prevent a fire in the mine. it can.
  • the method for manufacturing the conveyor belt 10 according to the present embodiment is not particularly limited, and a commonly used method or the like can be employed. Specifically, first, the raw materials were kneaded using a roll, a kneader, a Banbury mixer, etc., then formed into a sheet shape for each cover rubber layer 11a, 11b using a roll or the like, and then obtained.
  • a preferred example is a method in which the respective layers are laminated in a predetermined order so as to sandwich the coated rubber layer (reinforcing layer) 12 obtained as described above and pressed at a temperature of 140 to 170 ° C. for 10 to 60 minutes.
  • composition according to the present embodiment will be specifically described with reference to examples.
  • the composition according to the present embodiment is not limited to these.
  • the rubber coverage was calculated as the ratio (%) of the rubber covered area remaining on the surface of the steel cord after drawing to the surface area of the steel cord. A rubber coverage of 70% or higher was judged good. The evaluation results are shown in Table 1 below. In addition, it means that adhesiveness is so good that a rubber coverage is high.
  • ⁇ NR Natural rubber
  • TSR-20 SBR Styrene-butadiene rubber, trade name “NIPOL 1502”, manufactured by Nippon Zeon Co., Ltd.
  • CR1 Chloroprene rubber, sulfur-modified chloroprene rubber, trade name “Denka Chloroprene PM-40”, manufactured by Denki Kagaku Kogyo Co., Ltd.
  • CR2 Chloroprene rubber, non-sulfur modified chloroprene rubber, trade name “Denka Chloroprene S-41”, manufactured by Denki Kagaku Kogyo Co., Ltd.
  • BR butadiene rubber, trade name “Nipol BR1220”, manufactured by Nippon Zeon Co., Ltd.
  • Organochlorine compound Chlorination Paraffin, chlorine content 70%, trade name “Empara 70S”, manufactured by DOVER CHEMICAL COMPANY
  • HAF carbon carbon black, trade name “Niteron # 200”, manufactured by Tokai Carbon Co., Ltd.
  • Rosin Gum rosin, Arakawa Chemical Industries, Ltd. Made ⁇ Organic Salt salt: Cobalt naphthenate, cobalt content 10%, manufactured by Dainippon Ink & Co., Ltd.
  • Zinc flower Vulcanization accelerator, trade name “Zinc flower 3”, manufactured by Shodo Chemical Co., Ltd.
  • Comparative Example 1 was inferior in flame retardancy because it did not contain chloroprene rubber, and inferior in moisture resistance adhesion because it did not contain rosin.
  • Comparative Example 2 it was confirmed that the butadiene rubber was not included, so that the cold resistance was inferior, the chloroprene rubber content was inadequate, the flame retardancy was inferior, and the rosin was not included, and the adhesiveness and moisture resistance were inferior It was.
  • Comparative Example 3 since butadiene rubber was not included, the cold resistance was inferior, and since rosin was not included, the adhesiveness and moisture-resistant adhesive were inferior. It was.
  • Comparative Example 4 since rosin was not included, it was confirmed that the adhesiveness and moisture-resistant adhesiveness were inferior. Moreover, in the comparative example 5, since natural rubber was not included, it was confirmed that it is inferior to moisture-resistant adhesiveness. Further, in Comparative Example 6, it was confirmed that the content of the organic chlorine compound was excessive, so that the cold resistance was inferior, and because the value of Formula 1 exceeded 83, the roll processability was inferior. Further, in Comparative Example 7, it was confirmed that the rosin content was excessive, so that the cold resistance was inferior, and because the value of Formula 1 exceeded 83, the roll processability was inferior. Moreover, in Comparative Example 8, it was confirmed that the flame retardance was inferior because the content of the organic chlorine compound was insufficient.
  • a rubber composition containing a predetermined amount of butadiene rubber, chloroprene rubber, natural rubber as the remaining rubber component, and a predetermined amount of organic cobalt salt, rosin or rosin derivative, and organic chlorine compound in 100 parts by mass of the rubber component, In addition to excellent adhesion to galvanized steel cords, flame retardancy and cold resistance can be improved (see Examples 1 to 6).
  • the composition of the present embodiment is superior in adhesion to a steel cord plated with zinc as compared with a rubber composition used conventionally, and can improve flame retardancy and cold resistance. It has been found that it can be suitably used for manufacturing a cord conveyor belt.

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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)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Belt Conveyors (AREA)
PCT/JP2013/083526 2012-12-14 2013-12-13 ゴム組成物及びコンベヤベルト WO2014092191A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201380064539.7A CN104837911B (zh) 2012-12-14 2013-12-13 橡胶组合物及输送带
RU2015122455/05A RU2578145C1 (ru) 2012-12-14 2013-12-13 Каучуковая композиция и конвейерная лента
CA2894792A CA2894792C (en) 2012-12-14 2013-12-13 Rubber composition and conveyor belt

Applications Claiming Priority (2)

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WO2016199386A1 (ja) * 2015-06-09 2016-12-15 株式会社ブリヂストン ホース用ゴム組成物及びホース
JP2017200990A (ja) * 2016-04-28 2017-11-09 バンドー化学株式会社 カバーゴム用ゴム組成物、及び、コンベヤベルト

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CN105035627A (zh) * 2015-06-30 2015-11-11 艾艾精密工业输送系统（上海）股份有限公司 一种耐低温物流输送带及其制备方法
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