WO2020162080A1 - Composition de caoutchouc, produit vulcanisé, et article moulé - Google Patents

Composition de caoutchouc, produit vulcanisé, et article moulé Download PDF

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Publication number
WO2020162080A1
WO2020162080A1 PCT/JP2019/051315 JP2019051315W WO2020162080A1 WO 2020162080 A1 WO2020162080 A1 WO 2020162080A1 JP 2019051315 W JP2019051315 W JP 2019051315W WO 2020162080 A1 WO2020162080 A1 WO 2020162080A1
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chloroprene
mass
parts
rubber
rubber composition
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PCT/JP2019/051315
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English (en)
Japanese (ja)
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敦典 近藤
貴史 砂田
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デンカ株式会社
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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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L11/00—Compositions of homopolymers or copolymers of chloroprene

Definitions

  • the present invention relates to a rubber composition containing chloroprene rubber and a specific hydrotalcite compound, and a vulcanized product and a molded product of this rubber composition.
  • Chloroprene rubber is widely used as a material for industrial rubber products because of its excellent mechanical properties and flame retardancy, and various improvements have been made.
  • Patent Document 1 discloses a technique of chloroprene rubber having improved oil resistance.
  • Patent Documents 2 to 7 disclose techniques of chloroprene rubber having improved cold resistance, ozone resistance, heat resistance, vibration damping characteristics, and the like.
  • Japanese Patent Publication No. 2018-520221 Japanese Patent Laid-Open No. 2001-343072 JP 2001-343049 A Japanese Patent Laid-Open No. 11-323020 JP, 2001-131341, A JP, 2005-60581, A Japanese Patent No. 5412010
  • Patent Documents 1 to 7 described above have poor versatility because they use a chloroprene rubber having a special structure, or a technique for simultaneously improving the heat resistance and oil resistance of the chloroprene rubber. is not.
  • the present invention provides a rubber composition capable of simultaneously improving the oil resistance and heat resistance of the obtained vulcanizate, the vulcanizate of the rubber composition (vulcanizate obtained by vulcanizing the rubber composition). Another object is to provide a molded article containing the vulcanized product.
  • One aspect of the present invention is a rubber composition containing 100 parts by mass of chloroprene rubber and 2 to 16 parts by mass of a hydrotalcite compound represented by the following chemical formula (1).
  • M (1-x) Al x O 3.83x (1) (In the formula, M represents a divalent metal ion containing at least one selected from Mg and Zn, and x represents a numerical value (coefficient value) in the range of 0.2 to 0.5.)
  • the chloroprene rubber contains at least one selected from a homopolymer of 2-chloro-1,3-butadiene and a copolymer of 2-chloro-1,3-butadiene.
  • the copolymer of 2-chloro-1,3-butadiene is 2-chloro-1,3-butadiene and at least one monomer selected from 2,3-dichloro-1,3-butadiene and acrylonitrile. It is preferable to include a copolymer of
  • the present invention also provides a vulcanized product of the above rubber composition.
  • the present invention further provides a molded article containing the above-mentioned vulcanized product.
  • a rubber composition capable of simultaneously improving heat resistance and oil resistance of the obtained vulcanized product, and a vulcanized product obtained by vulcanizing the rubber composition and the vulcanized product. It is possible to provide a molded article containing the same.
  • the numerical range indicated by using “to” indicates the range including the numerical values before and after “to” as the minimum value and the maximum value, respectively.
  • the upper limit value or the lower limit value of the numerical range of a certain stage can be arbitrarily combined with the upper limit value or the lower limit value of the numerical range of another stage.
  • the upper limit value or the lower limit value of the numerical range may be replaced with the value shown in the examples.
  • the materials exemplified in the present specification can be used alone or in combination of two or more kinds.
  • the content of each component in the composition means the total amount of the plurality of substances present in the composition, unless a plurality of substances corresponding to each component are present in the composition, unless otherwise specified.
  • the rubber composition according to the present embodiment contains 100 parts by mass of chloroprene rubber and 2 to 16 parts by mass of a hydrotalcite compound represented by the following chemical formula (1).
  • a hydrotalcite compound represented by the following chemical formula (1).
  • M (1-x) Al x O 3.83x (1)
  • M represents a divalent metal ion containing at least one selected from Mg and Zn, and x represents a numerical value in the range of 0.2 to 0.5.
  • Chloroprene rubber is a chloroprene polymer having structural units derived from chloroprene (2-chloro-1,3-butadiene).
  • the chloroprene polymer is a chloroprene homopolymer, a chloroprene copolymer (a copolymer of chloroprene and a monomer copolymerizable with chloroprene), or a mixture of these polymers.
  • Examples of the monomer copolymerizable with chloroprene include alkyl acrylates such as methyl acrylate, butyl acrylate and 2-ethylhexyl acrylate; methyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate and the like.
  • Methacrylic acid alkyl esters such as 2-hydroxyethyl (meth)acrylate, 2-hydroxymethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate; 2,3-dichloro-1,3 -Butadiene; 1-chloro-1,3-butadiene; butadiene; isoprene; ethylene; styrene; acrylonitrile and the like.
  • the monomers copolymerizable with chloroprene can be used alone or in combination of two or more.
  • the chloroprene rubber may contain, for example, a polymer obtained by copolymerizing three or more kinds of monomers containing chloroprene. Also, the polymer structure of the polymer is not particularly limited.
  • the chloroprene rubber includes a chloroprene homopolymer, and at least one selected from a chloroprene copolymer, and the chloroprene copolymer is It is preferable to contain a copolymer of chloroprene and at least one monomer selected from 2,3-dichloro-1,3-butadiene and acrylonitrile.
  • chloroprene rubber is a homopolymer of chloroprene, a copolymer of chloroprene and 2,3-dichloro-1,3-butadiene, a copolymer of chloroprene and acrylonitrile, and chloroprene and 2,3-dichloro- It is preferable to contain at least one selected from the group consisting of a copolymer of 1,3-butadiene and acrylonitrile.
  • Chloroprene rubber from the viewpoint of further improving the heat resistance of the vulcanizate, preferably contains a homopolymer of chloroprene, from the viewpoint of further improving the oil resistance of the vulcanizate, a copolymer of chloroprene and acrylonitrile It is preferable to include.
  • Chloroprene rubber may contain a structure derived from a molecular weight modifier (chain transfer agent, etc.) used in the polymerization step.
  • examples of such chloroprene rubber include mercaptan-modified chloroprene rubber, xanthogen-modified chloroprene rubber, sulfur-modified chloroprene rubber, dithiocarbonate-based chloroprene rubber, trithiocarbonate-based chloroprene rubber, and carbamate-based chloroprene rubber.
  • the inclusion of a structural unit derived from chloroprene is preferably in the following range with respect to 100 parts by mass of chloroprene rubber.
  • the content of the structural unit derived from chloroprene is preferably 50 parts by mass or more, more preferably 70 parts by mass or more, further preferably 80 parts by mass or more, particularly preferably 90 parts by mass or more.
  • the content of the structural unit derived from chloroprene is less than 100 parts by mass, and may be 99 parts by mass or less or 95 parts by mass or less.
  • the content (copolymerization amount) of the structural unit derived from the monomer copolymerizable with chloroprene is preferably in the following range with respect to 100 parts by mass of the chloroprene rubber.
  • the content of the structural unit derived from the monomer copolymerizable with chloroprene is preferably 50 parts by mass or less, more preferably 30 parts by mass or less, further preferably 20 parts by mass or less, particularly preferably 10 parts by mass or less. is there.
  • the content of the structural unit derived from the monomer copolymerizable with chloroprene may exceed 0 parts by mass, and may be 1 part by mass or more or 5 parts by mass or more.
  • Chloroprene rubber can be produced by a method including a polymerization step of polymerizing a raw material monomer containing chloroprene.
  • Chloroprene rubber is, for example, a raw material monomer containing chloroprene (for example, chloroprene as a main component in the presence of a catalyst for polymerization reaction, a catalyst activator, a polymerization initiator, a chain transfer agent, etc., using an emulsifying dispersant. It can be obtained by emulsion polymerization of the starting material monomer).
  • an alkali metal salt of a saturated or unsaturated fatty acid having 6 to 22 carbon atoms, rosin acid or an alkali metal salt of disproportionated rosin acid (eg potassium rosinate), formalin of ⁇ -naphthalenesulfonic acid examples thereof include alkali metal salts (for example, sodium salts) of the condensate.
  • the catalyst for the polymerization reaction examples include inorganic peroxides such as potassium sulfate; organic peroxides such as ketone peroxides, peroxyketals, hydroperoxides, dialkyl peroxides, diacyl peroxides and the like. Can be mentioned.
  • catalyst activator examples include sodium sulfite, potassium sulfite, iron(II) oxide, anthraquinone, sodium ⁇ -sulfonate, formamidine sulfonic acid and L-ascorbic acid.
  • the polymerization initiator is not particularly limited, and known polymerization initiators generally used for emulsion polymerization of chloroprene monomer can be used.
  • known polymerization initiators generally used for emulsion polymerization of chloroprene monomer can be used.
  • potassium persulfate, ammonium persulfate, sodium persulfate, hydrogen peroxide, t -Butyl hydroperoxide and the like can be mentioned.
  • the chain transfer agent is also not particularly limited, and a chain transfer agent used in ordinary emulsion polymerization of chloroprene can be used.
  • Specific examples of the chain transfer agent include long-chain alkyl mercaptans such as n-dodecyl mercaptan, t-dodecyl mercaptan and n-octyl mercaptan; xanthogen compounds such as diisopropylxanthogen disulfide and diethylxanthogen disulfide; iodoform; benzyl 1-pyrroledithio.
  • the polymerization temperature of the raw material monomer containing chloroprene is not particularly limited and may be a temperature at which emulsion polymerization is generally performed.
  • the temperature at which emulsion polymerization is carried out is preferably 0 to 50°C, more preferably 20 to 50°C.
  • the final polymerization rate of the chloroprene rubber obtained in the above-mentioned polymerization step is not particularly limited, but it is preferably adjusted within the range of 30 to 100%.
  • the polymerization can be terminated by adding a polymerization terminator that terminates the polymerization reaction when the desired polymerization rate (conversion rate) is reached.
  • the polymerization terminator is not particularly limited, and a commonly used polymerization terminator can be used.
  • Specific examples of the polymerization terminator include phenothiazine (thiodiphenylamine), 4-tert-butylcatechol, 2,2-methylenebis-4-methyl-6-tert-butylphenol and the like.
  • unreacted monomers may be removed from the polymerization liquid obtained in the polymerization step.
  • the method for removing the unreacted monomer is not particularly limited, and examples thereof include a steam stripping method. After removing the unreacted monomer, the pH of the polymerization solution is adjusted, and the chloroprene rubber can be obtained through processes such as freeze-coagulation, washing with water, and drying with hot air in a usual manner.
  • the hydrotalcite compound is a hydrotalcite compound represented by the following chemical formula (1) and is used as an acid acceptor when vulcanizing a rubber composition.
  • M represents a divalent metal ion containing at least one selected from Mg and Zn
  • x represents a numerical value in the range of 0.2 to 0.5.
  • x is preferably 0.25 to 0.45, more preferably 0.25 to 0.4, and 0.25 to More preferably, it is 0.35.
  • the acid acceptor generally, a hydrotalcite compound to which H 2 O represented by the following chemical formula (2) is bound and magnesium oxide are known.
  • a hydrotalcite compound represented by the following chemical formula (2) when a hydrotalcite compound represented by the following chemical formula (2) is used, the hydrotalcite compound has a poor chlorine-trapping ability, so that the tensile properties (eg tensile strength) and heat resistance of the vulcanized product are impaired.
  • the oil resistance of the vulcanizate may be impaired because magnesium chloride produced by the reaction of magnesium oxide with chlorine takes in oil.
  • the rubber composition according to the present embodiment contains the specific hydrotalcite compound represented by the above chemical formula (1) in a specific amount described below, thereby simultaneously improving the heat resistance and oil resistance of the vulcanized product.
  • the rubber composition according to the present embodiment can contribute to the improvement of the tensile strength of the vulcanized product by containing the hydrotalcite compound represented by the chemical formula (1) described above in a specific amount.
  • M represents a divalent metal ion containing at least one selected from Mg and Zn
  • x′ is 3 to 7
  • y is 1 to 3
  • z is 7 to 20
  • m is 2 to.
  • the numerical value (coefficient value) in the range of 7 is shown.
  • Specific examples of the hydrotalcite compound represented by the formula (2) include, for example, Mg 4.3 Al 2 (OH) 12.6 CO 3 .mH 2 O (manufactured by Kyowa Chemical Industry Co., Ltd., trade name: DHT). -4A).
  • the content of the hydrotalcite compound is 2 to 16 parts by mass with respect to 100 parts by mass of chloroprene rubber.
  • the content of the hydrotalcite compound is 2 parts by mass or more with respect to 100 parts by mass of the chloroprene rubber, it is possible to prevent the chlorine scavenging ability from being poor and the heat resistance of the vulcanized product to be impaired.
  • the content of the site compound is 16 parts by mass or less with respect to 100 parts by mass of chloroprene rubber, vulcanization inhibition is caused and bubbles are generated on the surface of the vulcanized product, so that the vulcanized product has tensile breaking strength (tensile strength) and heat.
  • the content of the hydrotalcite compound is preferably 2 parts by mass to 14 parts by mass, more preferably 2 parts by mass with respect to 100 parts by mass of the chloroprene rubber from the viewpoint of further improving the heat resistance and oil resistance of the vulcanized product.
  • the content of the hydrotalcite compound is preferably 2 parts by mass to 14 parts by mass, more preferably 2 parts by mass with respect to 100 parts by mass of the chloroprene rubber from the viewpoint of further improving the heat resistance and oil resistance of the vulcanized product.
  • To 12 parts by mass more preferably 2 to 10 parts by mass, even more preferably 2 to 8 parts by mass, particularly preferably 3 to 8 parts by mass, very preferably 4 to 8 parts by mass. is there.
  • hydrotalcite compound examples include, for example, Mg 0.7 Al 0.3 O 1.15 (trade name: KW-2000, manufactured by Kyowa Chemical Industry Co., Ltd.), (Mg 0.75 Zn 0.25 ). 0.7 Al 0.3 O 1.15, and the like.
  • a filler or a reinforcing agent, a plasticizer, a vulcanizing agent, a vulcanization accelerator, a processing aid, an antioxidant, etc. are added within a range that does not impair the effects of the present invention. May be.
  • filler or reinforcing agent examples include carbon black, silica, clay, talc, calcium carbonate and the like.
  • Each of the filler and the reinforcing agent may be used alone or in combination of two or more.
  • the content of the filler or the reinforcing agent may be, for example, 5 parts by mass or more and 100 parts by mass or less based on 100 parts by mass of the chloroprene rubber.
  • the plasticizer is not particularly limited as long as it is compatible with chloroprene rubber, and vegetable oil (rapeseed oil etc.), phthalate plasticizer, DOS, DOA, ester plasticizer, ether/ester plasticizer, thioether Examples include plasticizers, aromatic oils, naphthene oils, and the like.
  • the plasticizer may be used alone or in combination of two or more, depending on the properties required for the rubber composition.
  • the content of the plasticizer may be, for example, 5 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the chloroprene rubber.
  • the vulcanizing agent is not particularly limited, but a metal oxide is preferable.
  • the metal oxide include zinc oxide, lead oxide, trilead tetraoxide, iron trioxide, titanium dioxide, calcium oxide and the like.
  • the vulcanizing agents may be used alone or in combination of two or more.
  • the content of the vulcanizing agent may be, for example, 1 part by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the chloroprene rubber.
  • vulcanization accelerators include trimethylthiourea compounds.
  • the content of the vulcanization accelerator may be, for example, 0.1 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the chloroprene rubber.
  • processing aids include fatty acids such as stearic acid; paraffinic processing aids such as polyethylene; fatty acid amides.
  • the processing aids may be used alone or in combination of two or more.
  • the content of the processing aid may be, for example, 0.1 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the chloroprene rubber.
  • antiaging agents examples include ozone anti-aging agents and heat resistance anti-aging agents.
  • ozone anti-aging agents include N-phenyl-N'-(1,3-dimethylbutyl)-p-phenylenediamine.
  • heat antiaging agent examples include 4,4'-bis( ⁇ , ⁇ -dimethylbenzyl)diphenylamine and octylated diphenylamine.
  • the antioxidants can be used alone or in combination of two or more. The content of the antioxidant may be, for example, 1 part by mass or more and 50 parts by mass or less based on 100 parts by mass of the chloroprene rubber.
  • the rubber composition according to the present embodiment is obtained by kneading the above-mentioned chloroprene rubber, the hydrotalcite compound represented by the chemical formula (1), and other compounds added as necessary at a temperature below the vulcanization temperature.
  • kneading device examples include a mixer, a Banbury mixer, a kneader mixer, and a two-roll mill.
  • the vulcanized product according to the present embodiment is a vulcanized product of the above rubber composition, and can be obtained by vulcanizing the above rubber composition.
  • the molded product according to the present embodiment contains the above-mentioned vulcanized product, and can be obtained by vulcanizing and molding the above-mentioned rubber composition.
  • the molded article according to the present embodiment is obtained by, for example, a method of molding the above rubber composition into various desired shapes and then vulcanizing it, or a method of vulcanizing the above rubber composition and then molding into various shapes. be able to.
  • a method for molding a molded product from the rubber composition a method such as press molding, extrusion molding or calender molding can be used.
  • the temperature for vulcanizing the rubber composition may be appropriately set according to the composition of the rubber composition, and is usually 140 to 220° C., preferably 150 to 180° C.
  • the time for vulcanization may be appropriately set depending on the composition of the rubber composition and the shape of the molded product, and is usually in the range of 10 minutes to 60 minutes.
  • the molded product according to the present embodiment is obtained by vulcanizing and molding the above rubber composition, and has improved heat resistance and oil resistance.
  • the molded product according to this embodiment can also be expected to have improved properties such as compression set, vulcanization rate, and scorch resistance.
  • the polymerization rate of the chloroprene-acrylonitrile copolymer latex was calculated from the dry mass of the chloroprene-acrylonitrile copolymer latex air-dried. Specifically, it was calculated by the following formula (I).
  • the solid content concentration means the concentration of the solid content obtained by heating 2 g of the sampled chloroprene-acrylonitrile copolymer latex at 130° C. and removing volatile components such as solvent (water), volatile chemicals and raw materials [mass %].
  • the total amount charged is the total amount of raw materials, reagents and solvent (water) charged in a polymerization vessel from the start of polymerization until a certain time.
  • the evaporation residue is the mass of the chemicals and raw materials charged from the start of the polymerization to a certain time and remaining as a solid content together with the polymer without being volatilized under the condition of 130°C.
  • the monomer charging amount is the sum of the amount of the monomer initially charged in the polymerization vessel and the amount of the monomers added in a certain time from the start of polymerization.
  • the "monomer” referred to here is the total amount of the chloroprene monomer and the acrylonitrile monomer.
  • Polymerization rate [%] ⁇ (total charged amount [g] ⁇ solid content concentration [mass %]/100) ⁇ (evaporation residue [g]) ⁇ /monomer charged amount [g] ⁇ 100 ( I)
  • the obtained chloroprene-acrylonitrile copolymer latex was adjusted to pH 7.0 and freeze-coagulated on a metal plate cooled to ⁇ 20° C. to emulsify and destroy it to obtain a sheet.
  • the obtained sheet was washed with water and then dried at 130° C. for 15 minutes to obtain a solid chloroprene-acrylonitrile copolymer.
  • the number average molecular weight Mn, the weight average molecular weight Mw, and the molecular weight distribution (Mw/Mn) of the chloroprene-acrylonitrile copolymer were measured by dissolving the chloroprene-acrylonitrile copolymer in THF (tetrahydrofuran) to obtain a sample having a concentration of 0.1% by mass. After preparing the solution, it was measured by a high speed GPC device (TOSOH HLC-8320GPC: manufactured by Tosoh Corporation) (standard polystyrene conversion).
  • TSK guard column HHR-H was used as a pre-column
  • three HSKgel GMHHR-H were used as an analytical column
  • the sample pump pressure was 8.0 to 9.5 MPa
  • the flow rate was 1 mL/min
  • the flow rate was 40°C. It was detected by a refractometer.
  • the molecular weight was obtained by using a calibration curve prepared by measuring a total of 9 standard polystyrene samples having known molecular weights listed below.
  • Mw 8.42 ⁇ 10 6 , 1.09 ⁇ 10 6 , 7.06 ⁇ 10 5 , 4.27 ⁇ 10 5 , 1.90 ⁇ 10 5 , 9.64 ⁇ 10 4 , 3.79 ⁇ 10 4. 1,74 ⁇ 10 4 , 2.63 ⁇ 10 3
  • the content of structural units derived from the acrylonitrile monomer (unsaturated nitrile monomer unit) contained in the chloroprene-acrylonitrile copolymer was calculated from the content of nitrogen atoms in the chloroprene-acrylonitrile copolymer. Specifically, for 100 mg of the chloroprene-acrylonitrile copolymer, the nitrogen atom content was measured using an elemental analyzer (Sumigraph 220F, manufactured by Sumika Chemical Analysis Service Co., Ltd.), and the structural unit derived from the acrylonitrile monomer was measured. The content of was calculated.
  • the measurement conditions for elemental analysis were as follows. The electric furnace temperature was set to 900° C. in the reaction furnace, 600° C.
  • the calibration curve was prepared by using aspartic acid having a known nitrogen content (nitrogen content: 10.52% by mass) as a standard substance.
  • the chloroprene-acrylonitrile copolymer had a number average molecular weight (Mn) of 138 ⁇ 10 3 g/mol, a weight average molecular weight (Mw) of 473 ⁇ 10 3 g/mol, and a molecular weight distribution (Mw/Mn).
  • Mn number average molecular weight
  • Mw weight average molecular weight
  • Mw/Mn molecular weight distribution
  • Table 1 or 2 manufactured by DENKA CORPORATION, mercaptan-modified chloroprene rubber, raw rubber Mooney viscosity ML1+4
  • Talcite C Korean Chemical Industry Co., Ltd., trade name: DHT-4A (registered trademark), chemical composition: Mg 4.3 Al 2 (OH) 12.6 CO 3 mH 2 O), Table 1 and Table 2, magnesium oxide (Kyowa Chemical Industry Co., Ltd., product name: Kyowamag (registered trademark) 150), stearic acid (New Nippon Rika Co., Ltd., product name: stearic acid 50S) 0.5 parts by mass, and carbon Black (manufactured by Tokai Carbon Co., Ltd., trade name: SIST (registered trademark) SO FEF carbon) 50 parts by mass, and plasticizer (manufactured by ADEKA Co., Ltd., product name: RS-700, polyether ester type) 10 parts by mass, 1 part by weight of TMU (manufactured by Ouchi Shinko Chemical Co., Ltd., product name: NOXCELLER (registered trademark) TMU, trimethylthiourea), and heat-resistant antioxidant
  • Vulcanized product The obtained rubber composition was press-vulcanized under the conditions of 170° C. for 20 minutes to prepare a sheet-shaped vulcanized product (molded product) having a thickness of 2 mm. The following evaluation was performed on the obtained vulcanized product. The evaluation results are shown in Tables 1 and 2.
  • A represents the elongation value at break (average value of 5 sheets) of the measurement sample before heat treatment
  • B represents the elongation value at break (average value of 5 sheets) of the measurement sample after heat treatment.
  • the rate of change in elongation at break (%) showed a value of -20% or more and 0% or less.
  • the vulcanized product has these properties, it has excellent productivity and can be suitably used as a molded product such as a rubber member for automobile (sealing material), a hose (hose material), a rubber mold, a gasket and the like.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Selon un aspect, l'invention fournit une composition de caoutchouc qui comprend 100 parties en masse d'un caoutchouc chloroprène, et 2 à 16 parties en masse d'un composé hydrotalcite représenté par la formule chimique (1). Ｍ（１－ｘ）ＡｌｘＯ３,８３ｘ　（１） (Dans la formule, M représente un ion métallique divalent contenant au moins un élément choisi parmi Mg et Zn, et x représente une valeur numérique dans une plage de 0,2 à 0,5.)
PCT/JP2019/051315 2019-02-08 2019-12-26 Composition de caoutchouc, produit vulcanisé, et article moulé WO2020162080A1 (fr)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01268736A (ja) * 1988-04-20 1989-10-26 Toyoda Gosei Co Ltd ゴム配合物
JPH03268942A (ja) * 1990-03-19 1991-11-29 Tosoh Corp 複合体
JPH0586229A (ja) * 1991-09-25 1993-04-06 Kyowa Chem Ind Co Ltd ハロゲン含有ゴム組成物
JPH1112392A (ja) * 1997-06-20 1999-01-19 Toyo Tire & Rubber Co Ltd クロロプレンゴム組成物
JP2004263198A (ja) * 2004-06-28 2004-09-24 Tosoh Corp クロロスルホン化エチレン−α−オレフィン共重合体
JP2009024037A (ja) * 2007-07-17 2009-02-05 Toyo Tire & Rubber Co Ltd ダイヤフラム用ゴム組成物及びダイヤフラム
JP2014009333A (ja) * 2012-07-02 2014-01-20 Yokohama Rubber Co Ltd:The ゴム組成物それを用いた加硫ゴム製品及びホース

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01268736A (ja) * 1988-04-20 1989-10-26 Toyoda Gosei Co Ltd ゴム配合物
JPH03268942A (ja) * 1990-03-19 1991-11-29 Tosoh Corp 複合体
JPH0586229A (ja) * 1991-09-25 1993-04-06 Kyowa Chem Ind Co Ltd ハロゲン含有ゴム組成物
JPH1112392A (ja) * 1997-06-20 1999-01-19 Toyo Tire & Rubber Co Ltd クロロプレンゴム組成物
JP2004263198A (ja) * 2004-06-28 2004-09-24 Tosoh Corp クロロスルホン化エチレン−α−オレフィン共重合体
JP2009024037A (ja) * 2007-07-17 2009-02-05 Toyo Tire & Rubber Co Ltd ダイヤフラム用ゴム組成物及びダイヤフラム
JP2014009333A (ja) * 2012-07-02 2014-01-20 Yokohama Rubber Co Ltd:The ゴム組成物それを用いた加硫ゴム製品及びホース

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