WO2003099924A1 - Composition de caoutchouc acrylique et produit reticule - Google Patents
Composition de caoutchouc acrylique et produit reticule Download PDFInfo
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- WO2003099924A1 WO2003099924A1 PCT/JP2003/006568 JP0306568W WO03099924A1 WO 2003099924 A1 WO2003099924 A1 WO 2003099924A1 JP 0306568 W JP0306568 W JP 0306568W WO 03099924 A1 WO03099924 A1 WO 03099924A1
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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
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0025—Crosslinking or vulcanising agents; including accelerators
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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
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
-
- 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
- C08L33/18—Homopolymers or copolymers of nitriles
- C08L33/22—Homopolymers or copolymers of nitriles containing four or more carbon atoms
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0615—Macromolecular organic compounds, e.g. prepolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09K2200/0625—Polyacrylic esters or derivatives thereof
Definitions
- the present invention relates to an acrylic rubber composition and a crosslinked product thereof.
- This crosslinked product can be suitably used as a material for seals, hoses, and the like, having excellent heat resistance, cold resistance, and deterioration oil resistance.
- Acrylic rubber has excellent heat resistance, oil resistance, etc., and is in contact with metals and oils, such as seals, hoses, vibration-proof materials, tubes or belts, etc. in the automotive field. Widely used as a material for rubber parts used for Such acrylic rubber is required to have excellent heat resistance and cold resistance, as well as low compression set, not to corrode metal, and more excellent oil resistance.
- the uncrosslinked acrylic rubber tends to stick to the metal surface and roll surface inside the bumper when kneading with a bumper mixer or roll, etc., resulting in lower recovery and cleaning after kneading. It is necessary to reduce the adhesiveness to the metal surface because it becomes necessary.
- acrylic rubber is required to be free from scorch because the crosslinking reaction may proceed during processing, so-called scorch.
- crosslinked product that does not corrode metals and has excellent oil resistance
- crosslinks a crosslinkable rubber composition obtained by blending an aromatic diamine crosslinking agent and a guanidine compound crosslinking accelerator with an acrylic rubber copolymerized with mono-lower alkylester fumarate.
- the following has been proposed (Japanese Patent Laid-Open No. 11-92614).
- This crosslinked product was excellent in heat aging resistance and cold resistance, but had insufficient oil resistance to deterioration and stability of scorch, and sometimes caused adhesion to metal surfaces.
- An object of the present invention is to provide an acrylic rubber composition which does not stick to a metal surface during kneading, does not cause scorch during processing, and provides a crosslinked product having excellent heat resistance, cold resistance and deterioration oil resistance. .
- the present inventors have conducted intensive studies to achieve the above object, and as a result, formulated a specific crosslinking agent and a specific amine compound into a carboxyl group-containing acrylic rubber containing a structural unit derived from methacrylonitrile. That the composition does not adhere to the metal surface and does not cause scorch during processing, and that a cross-linked product obtained by cross-linking the composition has excellent heat resistance, cold resistance and oil resistance to deterioration. Based on this finding, the present invention has been completed.
- the acryloxyl group-containing acrylic rubber (A) containing 0.1 to 30% by weight of the structural unit derived from methacrylonitrile, and the rubber (A) 100 parts by weight.
- an acryl rubber composition containing 0.05 to 20 parts by weight of a polyamine crosslinking agent (B) and a monoamine compound (C).
- the acrylic rubber composition of the present invention comprises a carboxyl group-containing acrylic rubber (A) containing 0.1 to 30% by weight of a structural unit derived from methacrylonitrile, and 100% by weight of the rubber (A).
- the polyamine crosslinker (B) and the monoamine compound (C) are each contained in an amount of 0.05 to 20 parts by weight.
- the carboxyl group-containing acrylic rubber (A) used in the present invention comprises acrylic acid Having a main structural unit consisting of a structural unit derived from a stele monomer ( a ) and a structural unit derived from an ethylenically unsaturated monomer containing a propyloxyl group (b), and further containing a structural unit derived from methacrylonitrile It is.
- the content of the structural unit derived from methacrylonitrile in the carboxyl group-containing acrylic rubber (A) is 0.1 to 30% by weight, preferably 0.2 to 25% by weight, more preferably 0.5 to 20% by weight. %, More preferably 1 to 10% by weight.
- the acrylic rubber (A) can be used to obtain scorch stability during processing and to be obtained using the same. Poor deterioration oil resistance of crosslinked product.
- the crosslinked product is inferior in cold resistance and heat resistance.
- the acrylic rubber (A) has excellent scorch stability during processing, A crosslinked product with excellent oil deterioration, cold resistance and heat resistance can be obtained.
- Power Rupokishiru group containing force Rupokishiru group content of the acrylic rubber (A) is preferably 5 X 1 0- 4 ⁇ 4 X 1 0 1 ephr, more preferably 2 X 1 0- 3 ⁇ 2 X 1 0 1 ephr, preferably especially a 4 X 1 0- 3 ⁇ 1 X 1 0 "1 ephr.
- force Rupokishiru group containing shape acrylic rubber (a) crosslinked product because it does not adequately crosslink the carboxyl group content is too low in On the other hand, if the amount is too large, the crosslinked product may become hard and lose rubber elasticity.
- the carboxyl group-containing acrylic rubber (A) can be copolymerized with an acrylate unit (a '), a propyloxyl group-containing ethylenically unsaturated simple unit (b, methacrylonitrile unit), and an optional component.
- an acrylate unit (a ') a propyloxyl group-containing ethylenically unsaturated simple unit (b, methacrylonitrile unit
- an optional component Based on the weight of the acrylic rubber (A), the sum of the acrylate unit (a ') and the carboxyl group-containing ethylenically unsaturated monomer unit (b') [(a ') + (b')] is 70 to 99.9% by weight, methacrylonitrile unit is 0.1 to 30% by weight, and monomer units copolymerizable with these are 0 to 70% by weight.
- % Of the acrylate unit (a ') and the sum of the acrylate unit (a') and the carboxyl group-containing ethylenically unsaturated monomer unit (b ') [(a') + (bO] (a,) / ((a ') + (bO)] is preferably 90 to 99.9% by weight.
- the acrylic rubber (A) containing a propyloxyl group is composed of an acrylate monomer (a), an ethylenically unsaturated monomer (b) containing a propyloxyl group, and methacrylonitrile.
- These optionally used copolymerizable monomers can be obtained by a conventionally known method for producing an acrylic rubber, for example, a method of emulsion copolymerization using a redox catalyst.
- an alkyl acrylate monomer alone, or an alkyl acrylate monomer and an alkoxyalkyl acrylate monomer can be used in combination. More preferably, an alkyl acrylate monomer and an alkoxyalkyl acrylate monomer are used in combination.
- the acrylate ester unit (a ') in the carboxyl group-containing acrylic rubber (A) is preferably 30 to 100% by weight, more preferably 30 to 90% by weight of an alkyl acrylate monomer unit, More preferably 40 to 89% by weight, particularly preferably 45 to 88% by weight, and the alkoxyalkyl acrylate monomer unit is preferably 0 to 70% by weight, more preferably 10 to 90% by weight. 70% by weight, more preferably 11 to 60% by weight, particularly preferably 12 to 55% by weight. If the alkyl acrylate unit is too large, cold resistance or oil resistance tends to decrease, while if the alkoxy alkyl acrylate monomer is too large, the tensile strength and elongation tend to decrease.
- alkyl acrylate monomer those having an alkyl group having 1 to 8 carbon atoms in the ester group are preferable.
- methyl acrylate, ethyl acrylate, n-propyl acrylate, acrylic acid Examples include n-butyl, isopropyl acrylate, isobutyl acrylate, n-hexyl acrylate, 2-ethylhexyl acrylate, cyclohexyl acrylate, and the like.
- ethyl acrylate and n-butyl acrylate are particularly preferred.
- alkoxyalkyl acrylate monomer those having an alkoxyalkyl group having 2 to 8 carbon atoms in the ester group are preferable. Specifically, methoxymethyl acrylate, ethoxymethyl acrylate, 2-ethoxyxyl acrylate 2-butoxyshethyl acrylate, 2-methoxyethyl acrylate, 2-propoxyshethyl acrylate, 3-methoxypropyl acrylate, 4-methoxybutyl acrylate, and the like. Among these, 2-ethoxyxyl acrylate and 2-methoxyethyl acrylate are particularly preferred.
- Examples of the carboxyl group-containing ethylenically unsaturated monomer (b) include acrylic acid and methacrylic acid.
- Potassium monomers such as oleic acid, acrylic acid, itaconic acid, maleic acid, fumaric acid and citraconic acid Monomer maleate; monomethyl maleate, monoethyl maleate, mono-n-maleate n-butyl, monomethyl fumarate, monoethyl fumarate Mono-n-butyl fumarate and the like, butenedionic acid monoalkyl ester monomers; and the like.
- the carboxyl group may be a carboxylic anhydride group, and carboxylic anhydride monomers such as maleic anhydride and citraconic anhydride can also be used as the monomer (b).
- carboxylic anhydride monomers such as maleic anhydride and citraconic anhydride can also be used as the monomer (b).
- monoethyl maleate, mono-n-butyl maleate, monoethyl fumarate, and mono-n-butyl fumarate are preferred.
- the unit amount of the acrylate monomer (a) based on the total amount is preferably 90 to 99.9% by weight, more preferably 92 to 99.7% by weight, and still more preferably 94 to 99.9% by weight.
- the unit amount of the carboxyl group-containing ethylenically unsaturated monomer (b) is preferably 0.1 to 10% by weight, more preferably 0.3 to 8% by weight, and still more preferably 0.3 to 8% by weight. 5-6% by weight. If the amount of the acrylate monomer (a) relative to the total amount of the main structural units is too small, the strength and elongation of the crosslinked product will be poor, and if it is too large, the crosslink may not be sufficiently crosslinked.
- the carboxyl group-containing acrylic rubber (A) used in the present invention contains, in addition to the main structural unit and the structural unit derived from methacrylonitrile, a unit derived from a monomer copolymerizable therewith. Is also good.
- the copolymerizable monomer include a conjugated diene monomer, a non-conjugated diene monomer, an aromatic vinyl monomer, and a 3-ethylenically unsaturated nitrile monomer (meth). (Excluding acrylonitrile), amide group-containing (meth) acrylic monomers, polyfunctional di (meth) acrylic monomers, and other ethylenically unsaturated monomers.
- Examples of the conjugated diene monomer include 1,3-butadiene, butadiene, chloroprene, and piperylene.
- Examples of the non-conjugated diene monomer include 1,2-butadiene, 1,4-pentylene, dicyclopentadiene, norbornene, ethylidene norporene, 1,4-hexadiene, norbornadiene, and the like.
- the aromatic vinyl monomer include styrene, ⁇ -methylstyrene, divinylbenzene, and the like.
- Acrylonitrile is exemplified as the ⁇ , / 3-ethylenically unsaturated nitrile monomer.
- Amide group Containing (meth) acrylic monomers include acrylamide, methacrylamide and the like.
- Examples of the polyfunctional di (meth) acrylic monomer include ethylene glycol diacrylate, propylene glycol diacrylate, ethylene glycol dimethacrylate, and propylene glycol dimethacrylate.
- Other ethylenically unsaturated monomers include ethylene, propylene, vinyl chloride, vinylidene chloride, vinyl acetate, ethyl vinyl ether, and butyl vinyl ether.
- the unit amount of the above-mentioned copolymerizable monomer in the carboxyl group-containing acrylic rubber (A) may be within a range that does not impair the object of the present invention, and is preferably 0 to 20% by weight, more preferably Is from 0 to 10% by weight.
- the carboxyl group-containing acrylic rubber (A) preferably has a viscosity (ML 1 + 4 , 10 or) of 10 to 70, more preferably 20 to 60, and particularly preferably 30 to 70. 50. If the Mooney viscosity is too low, the moldability and the mechanical strength of the crosslinked product may be poor. Conversely, if it is too large, moldability may be poor.
- the polyamine crosslinker (B) used in the acrylic rubber composition of the present invention is an amine compound which can relatively easily form a crosslinked structure with the carboxylic group of the above-mentioned carboxyl-containing acrylic rubber (A). is there.
- the amine compounds do not include those having a non-conjugated nitrogen-carbon double bond such as guanidine compounds.
- the polyamine crosslinker (B) includes an aliphatic polyamine crosslinker, an aromatic polyamine crosslinker, and the like.
- examples of the aliphatic polyamine amine pill include hexamethylenediamine, hexamethylenediamine carbamate, N, N'-dicinnamylidene-1,6-hexanediamine, and the like.
- amine cross-linking agents 4,4'-methylene dianiline, m-phenylenediamine, 4,4'-diaminodiphenyl ether, 3,4 'diamino diphenyl ether, 4,4'-1 (m —Phenylenediisopropylidene) dianiline, 4, 4 '-(p-Phenylenediisopropylidene) dianiline, 2,2,1-bis [4-1
- the compounding amount of the polyvalent amine cross-linking agent is 100 parts by weight of the acryloxyl group-containing acrylic rubber.
- the amount is 0.05 to 20 parts by weight, preferably 0.1 to 10 parts by weight, more preferably 0.2 to 7 parts by weight, particularly preferably 0.3 to 5 parts by weight. If the amount of the polyamine crosslinking agent is too small, crosslinking is not sufficiently performed, and it is difficult to maintain the shape of the crosslinked product. Conversely, if it is too large, the bridge will be too hard and the elasticity of the crosslinked rubber will be impaired.
- the acrylic rubber composition of the present invention may further contain a crosslinking accelerator in combination with the crosslinking agent.
- a crosslinking accelerator in combination with the above crosslinking agent.
- the crosslinking accelerator that can be used in combination with the polyvalent amine crosslinking agent includes a base dissociation constant at 25 ° C. in water.
- Examples of the guanidine compound include 1,3-diphenylguanidine and 1,3-diortolylguanidine.
- Examples of the imidazole compound include 2-methylimidazole and 2-phenylimidazole.
- Examples of the quaternary ammonium salts include tetra-n-butylammonium bromide and octyl decyl tri-n-butylammonium bromide.
- Examples of the polyvalent tertiary amine compounds include triethylenediamine, 1,8-diazabicyclo [5.4.0] indene-7, and the like.
- Examples of the tertiary phosphine compound include triphenylphosphine, tri-P-tolylphosphine, and the like.
- Examples of the metal salts of weak acids include inorganic weak salts such as sodium and potassium phosphates and carbonates, and organic weak salts such as stearates and radiophosphates.
- the amount of the crosslinking accelerator used per 100 parts by weight of the acryloxyl group-containing acrylic rubber (A) is preferably 0.1 to 20 parts by weight, more preferably 0.2 to 15 parts by weight, and particularly preferably. 0.3 to 10 parts by weight. If the amount of the crosslinking accelerator is too large, the crosslinking rate may be too fast during crosslinking, the crosslinking accelerator may bloom on the surface of the crosslinked product, or the crosslinked product may be too hard. Conversely, if the amount of the crosslinking accelerator is too small, the tensile strength of the crosslinked product may be significantly reduced, or the change in elongation or change in tensile strength after heat load may be too large.
- Examples of the monoamine compound (C) used in the present invention include an aromatic mono-amine compound, an aromatic mono-secondary amine compound, an aromatic mono-tertiary amine compound, an aliphatic mono-amine compound, and an aliphatic mono-secondary amine.
- the mono-amine compound (C-1) which can be used in the present invention is a compound in which one of the hydrogen atoms of ammonia is substituted with a hydrocarbon group, and examples thereof include aliphatic mono-amine and alicycle. Group mono-amines, aromatic mono-amines, amino alcohols, aminooxo compounds, and the like. Among these, an aliphatic mono-amine is preferred, and an aliphatic mono-amine having 8 to 20 carbon atoms is more preferred.
- aliphatic mono-grade amines include methylamine, ethylamine, propylamine, isopropylamine, n-butylamine, t-butylamine, sec-butylamine, hexylamine, heptylamine, octylamine, nonylamine, decylamine, decylamine, dodecylamine, , Tridecylamine, tetradecylamine, pentadecylamine, cetylamine, 2-ethylhexylamine, octadecylamine, allylamine, cis-2-butenylamine, 10- pentadecenylamine, trans-2- octademine Senilamine, cis-1-9-octyldecenylamine, nonadecylamine and the like, among which octylamine, decylamine, dodecylamine, t
- alicyclic mono-grade amine examples include cyclopropylamine, cyclobutylamine, cyclopentylamine, cyclohexylamine and the like.
- aromatic mono-grade amamine examples include aniline, 0-toluidine, m-toluidine, benzylamine, a-nafuramine, and / 3-naphthylamine.
- amino alcohol examples include aminoethanol, aminopropanol, D, L-araninol, 2-aminobutyl alcohol, 2-amino-12-methylpropanol, 2-amino-12-hydroxymethyl1-1,3 _Propanediol, 2-amino-1,2-methylpropane-1,3-diol, 2-amino-1,2-ethyl-1,3-propanediol, 1-chloro-1,3-aminopropyl 1,2-ol, 3 And amino alcohols such as —amino-1,2-propanediol and 2-amine-1,3-propanediol.
- aminooxo compound include 3-methoxypropylamine and 3-ethoxypropylamine.
- the aliphatic monosecondary amine compound (C-2) used in the present invention is a compound in which two hydrogen atoms of ammonia are substituted with an aliphatic hydrocarbon group.
- the aliphatic hydrocarbon group substituted with a hydrogen atom preferably has 1 to 30 carbon atoms, and more preferably has 8 to 20 carbon atoms.
- Specific examples include dimethylamine, getylamine, dipropylamine, diarylamine, diisopropylamine, di-n-butylamine, di-t-butylamine, di-sec-butylamine, dihexylamine, diheptylamine, dioctylamine, dinonylamine, didecylamine, Didecylamine, didodecylamine, ditridecylamine, ditetradecylamine, dipentyldecylamine, dicetylamine, di-2—edelhexylamine, dioctadecylamine, dicis-9-9-octenyldecenylamine, Dinonadecylamine is exemplified.
- dioctylamine, didecylamine, didodecylamine, ditetradecylamine, dicetylamine, dioctyldecylamine, dicis-19-year-old cutadecenylamine, dinonadecylamine and the like are preferable.
- Specific examples of the alicyclic monosecondary amine include dicyclohexylamine.
- the aliphatic monotertiary amine compound (C-3) used in the present invention is a compound in which all three hydrogen atoms of ammonia are substituted with an aliphatic hydrocarbon group.
- the aliphatic hydrocarbon group substituted with a hydrogen atom preferably has 1 to 30 carbon atoms, and more preferably has 1 to 22 carbon atoms.
- Specific examples include trimethylamine, triethylamine, tripipropylamine, triarylamine, triisopropylamine, tri-n_butylamine, tri-t-butylamine, tri-sec-butylamine, trihexylamine, triheptylamine, trioctylamine.
- N, N-dimethyldodecylamine, N, N-dimethyltetradecylamine, N, N-dimethylcetylamine, N, N-dimethyloctadecylamine, N, N-dimethylbehenylamine and the like are preferable.
- the above monoamine compounds may be used alone or in combination of two or more.
- the total amount of the above monoamine compound (C) to 100 parts by weight of the carboxyl group-containing acrylic rubber (A) is 0.05 to 20 parts by weight, preferably 0.1 to 100 parts by weight. 110 parts by weight.
- the amount is preferably 0.1 to 10 parts by weight, more preferably 0.2 to 5 parts by weight, and is preferably an aliphatic monosecondary amine and an aliphatic monotertiary.
- the total amount is preferably 0.2 to 10 parts by weight, more preferably 0.5 to 7 parts by weight.
- the amount of the monoamine compound is too small, the adhesion of the acryl rubber composition to metal becomes large, resulting in poor processability. Conversely, if the amount is too large, the monoamine compound may bloom on the surface of the crosslinked product, the strength of the crosslinked product may be significantly reduced, or the compression set may be increased.
- monoamine compound the number of moles of (C) (c m) and polyvalent amine crosslinker moles of (B) (b m) ratio of (c m / b m) is preferably from 0 0 1: It is preferably from 10, more preferably from 0.1 to 9, and even more preferably from 0.2 to 8.
- (c m Zb m ) is too small, the scorch stability of the acrylic rubber composition is deteriorated, so that processing becomes difficult. Conversely, if it is too large, the crosslink density will decrease and the heat resistance will deteriorate, increasing the compression set. Therefore, when (c m Z b m ) is within the above range, scorch stability, heat resistance, compression set characteristics, and the like are excellent, which is preferable.
- the acrylic rubber composition of the present invention may contain, if necessary, a reinforcing material, a filler, an antioxidant, a light stabilizer, a plasticizer, a processing aid, a lubricant, an adhesive, a lubricant, a flame retardant, and a fungicide. And additives such as an antistatic agent and a coloring agent.
- the acrylic rubber composition may further contain rubber, an elastomer, a resin, and the like other than the acrylic rubber (A), if necessary.
- natural rubber acrylic rubber other than acrylic rubber (A), polybutadiene rubber, polyisoprene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, etc .; olefin-based elastomer, styrene-based elastomer, vinyl chloride-based elastomer , Polyester-based elastomer, polyamide-based elastomer, polyurethane-based elastomer, polysiloxane An elastomer such as a system-based elastomer; a resin such as a polyolefin-based resin, a polystyrene-based resin, a polyacryl-based resin, a polyphenylene ether-based resin, a polyester-based resin, or a polycarbonate-based resin
- ⁇ in preparing the acrylic rubber composition of the present invention an appropriate mixing method such as roll mixing, Banbury mixing, screw mixing, and solution mixing can be adopted.
- the order of mixing is not particularly limited, but after sufficiently mixing components that are not easily reacted or decomposed by heat, as a component that is easily reacted or decomposed by heat, for example, a cross-linking agent is not reacted or decomposed. Mix at short time at temperature.
- the method for molding the acrylic rubber composition is not particularly limited. Any method such as compression molding, injection molding, transfer molding or extrusion molding can be used.
- the bridging method may be selected according to the shape of the crosslinked product, and may be any of a method of performing molding and crosslinking at the same time or a method of performing crosslinking after molding.
- the crosslinked product of the present invention can be obtained by heating the acryl rubber composition of the present invention containing a crosslinking agent.
- the heating temperature is preferably from 130 to 220 or more, more preferably from 140 to 200 ° C, and the crosslinking time is preferably from 30 seconds to 5 hours.
- a heating method a method used for rubber crosslinking such as press heating, steam heating, oven heating, and hot air heating may be appropriately selected.
- post-crosslinking may be performed in order to reliably crosslink the inside of the crosslinked product. Post-crosslinking varies depending on the heating method, crosslinking temperature, shape and the like, but is preferably performed for 1 to 48 hours. A heating method and a heating temperature may be appropriately selected.
- the Mooney viscosity of the acryl rubber was measured at 100 according to JISK630.
- a 1 cm x 3 cm x 0.8 cm uncrosslinked test piece of crosslinkable rubber composition was brought into close contact with a metal plate with a chrome-plated SUS surface, and pressed at 70 ° C for 5 minutes at 3 MPa. , Metal The stress required to separate the plate from the specimen was measured. The lower the stress value, the less likely it is to stick to the metal surface.
- Mooney scorch time (t5) was measured at 125 ° C according to JIS K6300. The greater the value of the nice coach time t5, the better the scorch stability.
- the rubber composition is molded and cross-linked with a press at 170 for 20 minutes to form a 15 cm x 15 cm x 2 mm sheet, left at 170 for 4 hours for post-crosslinking, punched out into a predetermined shape, and did.
- Deterioration oil resistance was measured with an apparatus according to JIS K 6258.
- a commercially available SJ-class engine oil was used as the test oil, and air was continuously mixed into the test vessel at a rate of 150 cc / min to promote oil deterioration.
- the test piece was immersed in a test oil and left in an environment of 150 ° C. for 70 hours. After the test piece was taken out, its surface hardness was measured in accordance with JIS K 6251. The smaller the change in hardness, the better the resistance to deterioration oil.
- breaking strength tensile strength
- breaking elongation elongation
- the elongation at break (elongation) and hardness are measured as physical properties in the same manner as in (5) above. Then, according to JIS K 6257, aging by air heating was performed for 70 hours in an environment of 175 ° C, and the elongation and hardness were measured again, and the change in tensile elongation and the change in hardness were measured. The closer these changes are to zero, the better the heat resistance.
- Acrylic rubber A (Ethyl acrylate unit content 43%, n-butyl acrylate unit content 30%, 2-methoxyethyl acrylate unit content 20%, methacrylonitrile unit content 5%, mono-n-butyl maleate Unit content 2% (monomer (a) unit content 95%, monomer (b) unit 5%, acryl acrylate unit content per monomer (a) unit 85.3%; acrylic Table 1 shows the composition of the rubber a), the carboxyl group content 9 X 10- 3 ephr, without one hundred twenty-one viscosity (ML 1 + 4, 100) 35) 100 parts classification by Kabonbu rack (ASTM D 1765; N 550) 60 parts, stearic acid (carbon black dispersant, softener) 2 parts and 4,4'-bis ( ⁇ , ⁇ -dimethylpentyl) diphenylamine (antiaging agent) 2 parts at 50 ° C And knead it with Bambari, then 4,4'-dia
- cross-linkable acryl rubber composition Using this cross-linkable acryl rubber composition, a mu-scorch time and an adhesion test to a metal surface were performed. Further, the crosslinked acrylic rubber composition is pressed, crosslinked, and postcrosslinked under the above-mentioned conditions, and a test piece prepared is used to obtain a crosslinked product having tensile strength, elongation, hardness, heat resistance, cold resistance, and heat resistance. Degraded oil properties and corrosiveness to metals were measured and evaluated. Also, the crosslinkable acrylic rubber composition was molded and cross-linked by pressing at 170 ° C for 20 minutes at 1 OMPa, and left at 170 ° C for 4 hours for post-crosslinking. An O-ring was made and the compression set of the crosslinked product was evaluated. Table 2 shows the results.
- Example 2 Performed except that 0.3 parts of octyldecylamine was replaced by 2 parts of didodecylamine (aliphatic mono-tertiary amine compound) and 2 parts of N, N-dimethyloctadecylamine (aliphatic monotertiary amine compound)
- An acryl rubber composition was produced in the same manner as in Example 1, and each physical property was evaluated in the same manner as in Example 1. Table 2 shows the results.
- Acrylic rubber composition was produced in the same manner as in Example 1 except that 0.5 part and zinc dibutyldithiocarbamate (crosslinking accelerator) were used in an amount of 0.5 part. It was not worth measuring each physical property.
- the acrylic rubber composition containing no monoamine compound has poor scorch stability, large adhesion to metal, and poor processability (Comparative Example 1).
- a composition using an acrylic rubber containing no methacrylonitrile is inferior in scorch stability and has a large change in hardness after evaluation of deterioration resistance (Comparative Example 2).
- a composition using an acrylic rubber copolymerized with acrylonitrile instead of methacrylonitrile has poor scorch stability.
- the crosslinked product has deteriorated heat aging resistance and deterioration oil resistance (Comparative Example 3).
- the crosslinkable acrylic rubber composition of the present invention hardly adheres to a metal surface, hardly causes scorch, has excellent resistance to deterioration oil after crosslinking, and does not corrode metal (Examples 1 and 2). ). Industrial applicability
- the acrylic rubber composition of the present invention provides a crosslinked product which has no sticking to metal during kneading or the like, does not cause scorch during processing, and has excellent heat resistance, cold resistance and oil resistance to deterioration. Therefore, a cross-linked product obtained by cross-linking this acrylic rubber composition is suitable for a wide range of materials for rubber parts such as seals, hoses, vibration-proof materials, tubes, belts, boots, etc. by utilizing these characteristics. Can be used for
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60315473T DE60315473T2 (de) | 2002-05-27 | 2003-05-27 | Acrylkautschukzusammensetzung und vernetztes produkt |
EP03733076A EP1535962B1 (en) | 2002-05-27 | 2003-05-27 | Acrylic rubber composition and crosslinked product |
US10/515,823 US7176263B2 (en) | 2002-05-27 | 2003-05-27 | Acrylic rubber composition and crosslinked product |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002152152A JP4022736B2 (ja) | 2002-05-27 | 2002-05-27 | アクリルゴム組成物及び架橋物 |
JP2002-152152 | 2002-05-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003099924A1 true WO2003099924A1 (fr) | 2003-12-04 |
Family
ID=29561270
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/006568 WO2003099924A1 (fr) | 2002-05-27 | 2003-05-27 | Composition de caoutchouc acrylique et produit reticule |
Country Status (6)
Country | Link |
---|---|
US (1) | US7176263B2 (ja) |
EP (1) | EP1535962B1 (ja) |
JP (1) | JP4022736B2 (ja) |
CN (1) | CN1302068C (ja) |
DE (1) | DE60315473T2 (ja) |
WO (1) | WO2003099924A1 (ja) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE602005007186D1 (de) * | 2004-02-27 | 2008-07-10 | Zeon Corp | Acrylkautschuk und vernetzbare acrylkautschukzusammensetzung |
WO2006129705A1 (ja) * | 2005-05-31 | 2006-12-07 | Zeon Corporation | アクリルゴム組成物および架橋物 |
JP5256740B2 (ja) * | 2005-12-21 | 2013-08-07 | 日本ゼオン株式会社 | 架橋性ゴム組成物およびゴム架橋物 |
JP4626624B2 (ja) * | 2006-03-28 | 2011-02-09 | 東海ゴム工業株式会社 | 耐熱エアホース |
JP5135792B2 (ja) * | 2006-12-27 | 2013-02-06 | 日本ゼオン株式会社 | 架橋性ゴム組成物およびゴム架橋物 |
JP4883178B2 (ja) | 2008-01-30 | 2012-02-22 | ユニマテック株式会社 | 新規ジウレタン化合物、その製造法およびそれを含有するアクリルゴム組成物 |
JP5629966B2 (ja) * | 2008-07-02 | 2014-11-26 | Nok株式会社 | アクリルゴム組成物 |
FR2947829B1 (fr) * | 2009-07-10 | 2012-02-24 | Michelin Soc Tech | Composition a base de caoutchouc naturel et d'un compose poly-amine |
CN102617964B (zh) * | 2010-12-28 | 2016-03-09 | 山东美晨科技股份有限公司 | 一种应用于曲轴箱通风管的丙烯酸酯橡胶配制原料 |
KR101423816B1 (ko) * | 2011-12-16 | 2014-07-28 | 엘에스엠트론 주식회사 | 고내열 고무호스 조성물 및 이를 이용한 고무호스 |
JP6375950B2 (ja) * | 2012-11-30 | 2018-08-22 | 日本ゼオン株式会社 | アクリルゴム組成物およびゴム架橋物 |
CN107207746A (zh) * | 2015-02-25 | 2017-09-26 | 日本瑞翁株式会社 | 橡胶交联物 |
EP3885338A4 (en) | 2018-11-20 | 2022-07-13 | Unimatec Co., Ltd. | NOVEL CARBAMATE ESTER COMPOUND AND ACRYLIC RUBBER COMPOSITION CONTAINING THE SAME |
EP3992218A4 (en) * | 2019-06-28 | 2023-07-26 | Zeon Corporation | ACRYLIC RUBBER, COMPOSITION OF ACRYLIC RUBBER AND RETICULATED RUBBER |
JPWO2021246512A1 (ja) * | 2020-06-05 | 2021-12-09 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001207008A (ja) * | 2000-01-28 | 2001-07-31 | Nippon Zeon Co Ltd | アクリルゴム組成物、架橋性アクリルゴム組成物およびその架橋物 |
JP2002265737A (ja) * | 2001-03-06 | 2002-09-18 | Nippon Zeon Co Ltd | アクリルゴム組成物および加硫物 |
JP2002317091A (ja) * | 2001-04-20 | 2002-10-31 | Denki Kagaku Kogyo Kk | アクリル系エラストマー組成物 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3743489A1 (de) * | 1987-12-22 | 1989-07-13 | Bayer Ag | Flexible polymermischungen |
DE3811899A1 (de) * | 1988-04-09 | 1989-10-19 | Bayer Ag | Polymerisatmischung fuer flexible folien |
DE3841669A1 (de) * | 1988-12-10 | 1990-06-13 | Bayer Ag | Polymerisatmischung |
DE3918405A1 (de) * | 1989-06-06 | 1990-12-13 | Bayer Ag | Polymerisatmischungen fuer flexible folien |
DE4125981A1 (de) * | 1991-08-06 | 1993-02-11 | Bayer Ag | Ethylenpolymerisate enthaltende polymerlegierungen fuer flexible folien |
JPH07144386A (ja) * | 1993-09-28 | 1995-06-06 | Denki Kagaku Kogyo Kk | 合成樹脂複合体 |
JP2001146540A (ja) | 1999-11-22 | 2001-05-29 | Tokai Rubber Ind Ltd | ゴム組成物及び自動車用燃料輸送ホース |
JP2001265737A (ja) | 2000-03-17 | 2001-09-28 | Nec Soft Ltd | 認証システムおよび認証方法、並びに記録媒体 |
-
2002
- 2002-05-27 JP JP2002152152A patent/JP4022736B2/ja not_active Expired - Fee Related
-
2003
- 2003-05-27 DE DE60315473T patent/DE60315473T2/de not_active Expired - Fee Related
- 2003-05-27 WO PCT/JP2003/006568 patent/WO2003099924A1/ja active IP Right Grant
- 2003-05-27 CN CNB03811996XA patent/CN1302068C/zh not_active Expired - Fee Related
- 2003-05-27 US US10/515,823 patent/US7176263B2/en not_active Expired - Lifetime
- 2003-05-27 EP EP03733076A patent/EP1535962B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001207008A (ja) * | 2000-01-28 | 2001-07-31 | Nippon Zeon Co Ltd | アクリルゴム組成物、架橋性アクリルゴム組成物およびその架橋物 |
JP2002265737A (ja) * | 2001-03-06 | 2002-09-18 | Nippon Zeon Co Ltd | アクリルゴム組成物および加硫物 |
JP2002317091A (ja) * | 2001-04-20 | 2002-10-31 | Denki Kagaku Kogyo Kk | アクリル系エラストマー組成物 |
Non-Patent Citations (1)
Title |
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See also references of EP1535962A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP1535962A1 (en) | 2005-06-01 |
CN1302068C (zh) | 2007-02-28 |
CN1656168A (zh) | 2005-08-17 |
DE60315473T2 (de) | 2008-04-24 |
JP4022736B2 (ja) | 2007-12-19 |
DE60315473D1 (de) | 2007-09-20 |
US20050222341A1 (en) | 2005-10-06 |
US7176263B2 (en) | 2007-02-13 |
EP1535962B1 (en) | 2007-08-08 |
JP2003342437A (ja) | 2003-12-03 |
EP1535962A4 (en) | 2005-11-16 |
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