WO2004020516A1 - ポリマーアロイ、架橋物および燃料ホース - Google Patents
ポリマーアロイ、架橋物および燃料ホース Download PDFInfo
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- WO2004020516A1 WO2004020516A1 PCT/JP2003/010929 JP0310929W WO2004020516A1 WO 2004020516 A1 WO2004020516 A1 WO 2004020516A1 JP 0310929 W JP0310929 W JP 0310929W WO 2004020516 A1 WO2004020516 A1 WO 2004020516A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
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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
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
-
- 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
Definitions
- the present invention relates to a polymer alloy which is excellent in cold resistance, ozone resistance, gasoline permeation resistance and fuel oil resistance and is suitable as a fuel hose material, a crosslinked product of the polymer alloy, and a crosslinked product of the polymer alloy.
- a nitrile group-containing copolymer rubber such as acrylonitrile-butadiene rubber is a typical rubber used for various purposes such as a fuel hose used for a fuel pipe of an automobile.
- the nitrile group-containing copolymer rubber has a problem in that it has poor ozone resistance, and deteriorates quickly unless an ozone deterioration inhibitor is added. Therefore, in order to improve the ozone resistance of the nitrile group-containing copolymer rubber, an ozone deterioration inhibitor is generally added to the nitrile group-containing copolymer rubber.
- the mechanism of action of the antiozonant is that the radicals generated by ozone react with the rubber molecules before reacting with the rubber molecules to prevent the rubber from deteriorating. May deteriorate and its function may be lost. As a result, even if the deterioration of rubber molecules could be delayed, it could not be completely prevented, and it was difficult to maintain the ozone resistance of rubber for a long period of time.
- This polymer alloy has excellent ozone resistance and fuel oil resistance, and is therefore widely used as an automotive part, mainly in fuel hoses.
- the chlorine resin contained in the polymer alloy may release chlorine due to disposal, and may cause environmental problems. For this reason, there is a tendency to use it, especially in Japan, and new materials are required. Is being used.
- halogen-containing resins such as chloride chloride resin.
- a copolymer rubber containing a nitrile group and various halogen-free thermoplastic resins for example, a polyamide resin (Shinichiro Goto, Journal of the Rubber Society of Japan, Vol. 73, pp. 247, 2000), polypropylene Resin (Hiroichi Iino, Journal of the Rubber Society of Japan, Vol. 38, p. 7, 1965), styrene-acrylonitrile copolymer resin (Toshio Nishi, Journal of The Rubber Society of Japan, Vol. 68, 8) (P. 34, 1995)).
- Japanese Patent Application Laid-Open No. 2000-225627 proposes a blend of a nitrile group-containing copolymer rubber and a vinyl resin having a crosslinkable functional group.
- An acrylic resin is mentioned as an example of the bead-based resin.
- a rubber having excellent fuel oil resistance and a resin having excellent ozone resistance can be sufficiently dispersed by introducing a crosslinkable functional group into a part of the bullet resin. As a result, an attempt is made to balance the fuel oil resistance and the ozone resistance of the crosslinked product of the blend.
- an object of the present invention is to provide a polymer alloy which is excellent in cold resistance, ozone resistance, gasoline permeation resistance and fuel oil resistance and is suitable as a material for a fuel hose, and a crosslinked product of the polymer alloy. It is an object of the present invention to provide a fuel hose composed of the crosslinked product.
- the acrylic resin (B) contains 50% by weight or more of (meth) acrylate monomer units and 1 to 27% by weight of ⁇ , ⁇ -ethylenically unsaturated nitrile monomer units Is provided.
- the polymer alloy preferably has an ⁇ , ⁇ -ethylenically unsaturated nitrile monomer unit amount of 1.5 to 20% by weight in the acrylic resin ( ⁇ ). /. It is.
- the a, j3-ethylenically unsaturated-tolyl monomer unit is a (meth) atalylonitrile unit.
- This polymer alloy preferably further contains an ester compound (C) of a compound (a) represented by the following general formula 1 and an alcohol (b) having an ether bond in the molecule.
- HOOCRCOOH R in the formula represents an alkylene group having 2 to 10 carbon atoms.
- the polymer alloy preferably further contains a crosslinking agent.
- a fuel hose composed of the crosslinked product.
- This fuel hose is preferably for motor vehicles.
- the polymer alloy of the present invention comprises: a nitrile group-containing copolymer rubber (A); Fat (B).
- the nitrile group-containing copolymer rubber (A) used in the present invention can be copolymerized with an a, j3-ethylenically unsaturated etryl monomer and theêt,) 3-ethylenically unsaturated-tolyl monomer.
- This is a rubber obtained by copolymerizing functional monomers and hydrogenating carbon-carbon unsaturated bonds in the main chain as necessary.
- Examples of the ⁇ ,] 3-ethylenically unsaturated nitrile monomer include acrylonitrile, methacrylonitrile, and ⁇ - chloroacrylonitrile. Among them, acrylonitrile is preferred.
- the content of the 3-ethylenically unsaturated nitrile monomer relative to the total amount of the nitrile group-containing copolymer rubber (A) is preferably 30 to 80% by weight, more preferably 35 to 80% by weight. 60% by weight. If the content of ⁇ ,] 3-ethylenically unsaturated nitrile monomer is too small, the fuel oil resistance tends to be poor, while if it is too large, the cold resistance tends to be poor.
- Monomers that can be copolymerized with ⁇ , ⁇ -ethylenically unsaturated tolyl monomers include synergistic gen monomers, non-conjugated gen monomers, ⁇ -olefins, aromatic butyl monomers, fluorine containing vinyl monomers, ⁇ ,] 3- ethylenically unsaturated monocarboxylic acids, alpha, beta one ethylenically unsaturated polycarboxylic acid or its anhydride, alpha, one ethylenically unsaturated saturated carboxylic acid ester monomer And a copolymerizable antioxidant.
- Examples of the conjugated diene monomer include 1,3-butadiene, isoprene, 2,3-dimethyl-11,3-butadiene, and 1,3-pentadiene. Among them, 1,3-butadiene is preferred.
- the non-conjugated diene monomer preferably has 5 to 12 carbon atoms, and examples thereof include 1,4-pentadiene, 1,4-hexadiene, burnorbornene, and dicyclopentene.
- examples of the ⁇ -olefin those having 2 to 12 carbon atoms are preferable, and examples thereof include ethylene, propylene, 1-butene, 4-methyl-1-pentene, 11-hexene, and 1-octene.
- aromatic vinyl monomers examples include styrene, ⁇ -methylstyrene, bierpyridine, and the like.
- Fluoro-containing vinyl monomers include fluoroethyl vinyl ether, phenolic propyl bi-noreethenol, ⁇ -trifluoromethylstyrene, pentafluorobenzoyl butyl, difluoroethylene, tetrafluoroethylene And the like.
- Examples of the a, j3-ethylenically unsaturated monocarboxylic acid include atalylic acid and methacrylic acid.
- a, jS—Ethylenically unsaturated polycarboxylic acids include itaconic acid, fumaric acid, and maleic acid.
- the anhydride of ⁇ , ⁇ -ethylenically unsaturated polycarboxylic acid examples include itaconic anhydride, maleic anhydride and the like.
- ⁇ , ⁇ -ethylenically unsaturated carboxylic acid ester monomers include alkyl groups having 1 to 18 carbon atoms such as methyl acrylate, ethyl acrylate, II-dodecyl acrylate, methyl methacrylate, and ethyl methacrylate.
- copolymerizable antioxidants examples include N— (4-anilinophenyl) acrylamide, N— (4-anilinophenyl) methacrylamide, N— (4-anilinophenyl) cinnamamide, N— (4-anilinophenyl) ) Crotonamide, N-phenylinoleic 4- (3-bi-norependinoleoxy) aniline, N-pheninole-1- (4-vinylbenzyloxy) aniline and the like.
- the nitrile group-containing copolymer rubber (A) used in the present invention does not substantially contain halogen.
- the halogen content is preferably 0.5% by weight or less, more preferably 0.1% by weight or less, and particularly preferably 0% by weight. The lower the halogen content, the lower the halogen release during waste treatment.
- the mu-viscosity (ML 1 +4 , 100 ° C.) of the -tolyl group-containing copolymer rubber (A) used in the present invention is preferably 10 to 300, more preferably 20 to 300. 250, particularly preferably 30 to 200. If the viscosity is too low, the mechanical properties of the crosslinked product may be poor, while if it is too high, the processability may be poor.
- the method for producing the nitrile group-containing copolymer rubber (A) used in the present invention is not particularly limited, and the monomer may be polymerized according to a known method.
- the acrylic resin (B) used in the present invention contains 50% by weight or more, preferably 70% by weight or more, of a (meth) acrylate monomer unit.
- the acrylic resin (B) used in the present invention contains ⁇ ,] 3-ethylenically unsaturated-tolyl monomer units.
- the ⁇ -ethylenically unsaturated nitrile monomer include the same ones as in the case of the above-mentioned utrile group-containing copolymer rubber (II). Among them, (meth) acrylonitrile is preferred.
- the content of the a, j3-ethylenically unsaturated-tolyl monomer is from 1 to 27% by weight based on the total amount of the acrylic resin (B). Preferably it is 1.5 to 20% by weight.
- ⁇ nitrile group-containing copolymer rubber
- the ozone resistance can be improved, but if it is too large, the ozone resistance tends to decrease.
- the (meth) acrylic acid ester monomer unit is an acrylic acid ester homopolymerizing unit; a methacrylic acid ester homopolymerizing unit; a copolymerizing unit of an acrylic acid ester and a methacrylic acid ester A copolymerized unit of one or both of acrylate and methacrylate, and a monomer copolymerizable therewith;
- (Meth) acrylic acid ester monomers include (meth) methyl acrylate, (meth) ethyl acrylate, (meth) propyl acrylate, (meth) acrylic acid n-butyl, (meth) acrylic acid isoptyl, ( Examples include t-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and octyl (meth) acrylate.
- the monomer copolymerizable with the (meth) acrylic acid ester is not particularly limited as long as it can be copolymerized with one or both of acrylic acid ester and methacrylic acid ester. Is preferable, and a monomer that does not introduce a crosslinkable functional group is preferable.
- examples of such a monomer include an aromatic vinyl monomer, a vinyl ester / monomer, and a vinyl ether monomer.
- the aromatic butyl monomer include styrene, butyl toluene, and monomethyl styrene.
- the biel ester monomer include biel acetate, butyl propionate, and the like.
- the vinyl ether monomer include methyl vinyl ether, ethyl butyl ether, and hydroxybutyl vinyl ether.
- the acrylic resin (B) used in the present invention does not substantially contain halogen.
- the halogen content is preferably 0.5% by weight / 0 or less, more preferably 0.1% by weight or less, and particularly preferably 0% by weight. The lower the halogen content, the more the same advantages as in the above-mentioned tri- / group-containing copolymer rubber (A).
- the weight average molecular weight (Mw) of the acrylic resin (B) used in the present invention is not particularly limited, but is preferably 50,000 to 4,000 in terms of polystyrene in gel 'permeation' chromatography (GPC). , More preferably from 100,000 to 2,000,000, particularly preferably from 200,000 to 1,000,000. If the weight average molecular weight is too small, ozone resistance may decrease. If the weight average molecular weight is too high, the moldability may be poor.
- the acrylic resin (B) used in the present invention preferably has a higher glass transition temperature or melting temperature of 250 ° C or lower, more preferably 100 to 230 ° C. More preferred. Depending on the structure of the acrylic resin, there is a glass transition temperature but no melting temperature. In such a case, the glass transition temperature is preferably in the above range. If the temperature is too low or too high, the ozone resistance may be poor.
- the method for producing the acrylic resin (B) used in the present invention is not particularly limited, but is preferably obtained in the form of particles by emulsion polymerization, suspension polymerization or the like. In emulsion polymerization, suspension polymerization, etc., seed polymerization may be performed.
- the average particle size of the acrylic resin (B) when produced as particles is not particularly limited, but is preferably 10 or less, more preferably 2 / im or less. If the average particle size is too large, the ozone resistance of the crosslinked product tends to decrease.
- the average particle size of the acrylic resin (B) can be controlled by the polymerization conditions.
- the lump-shaped acrylic resin (B) is pulverized by a pulverizer such as a jet air pulverizer, a mechanical collision pulverizer, a roll mill, a hammer mill, an impeller breaker, etc.
- the particle size of the acryl resin can also be adjusted by introducing it into a classifier such as a sieve classifier and classifying.
- Nitrile group-containing copolymer rubber (A) and the total amount of the acrylic resin (B) - the content of the tolyl group-containing copolymer rubber (A) is 40 to 90 weight 0 /. It is preferably 60 to 80% by weight.
- the content of the acrylic resin (B) to the total amount of nitrile group-containing copolymer rubber (A) and acrylic resins (B) is 10 to 60 wt%, the good Mashiku 20-40 weight 0 /. It is.
- the polymer alloy of the present invention comprises, in addition to the -tolyl group-containing copolymer rubber (A) and the acrylic resin (B), a compound (a) represented by the following general formula 1 and an alcohol (b) having an ether bond in the molecule. ) And an ester compound (C).
- the alkylene group R of the compound (a) represented by the general formula 1 is preferably a straight-chain alkylene group. Those having a carboxyl group bonded to the end are more preferable.
- the alkylene group R has 2 to 10 carbon atoms, preferably 4 to 8 carbon atoms. If the alkylene group has too few carbon atoms, the vulcanizate will have poor ozone resistance. Conversely, if the number of carbon atoms is too large, the rubber composition cannot be kneaded, or the ester compound (C) bleeds on the surface of the crosslinked product.
- the compound (a) include succinic acid, glutaric acid, methyl succinic acid, adipic acid, dimethyl succinic acid, pimelic acid, suberic acid, tetramethyl succinic acid, azeline acid, and sepatic acid.
- the alcohol (b) having an ether bond in the molecule preferably has 4 to 10 carbon atoms, more preferably 6 to 8 carbon atoms. Alcohol is preferred.
- the number of ether bonds contained in the molecule of the alcohol (b) is preferably 1 to 4, more preferably 1 to 2. If the number of ether bonds is too large, the ozone resistance of the crosslinked product may be poor.
- preferred alcohols (b) include alcohols having 4 carbon atoms and 1 ether bond, such as methoxypropyl alcohol, ethoxyethyl alcohol or propoxymethyl alcohol; and carbon atoms such as dimethoxyethyl alcohol or methoxyxethyl alcohol.
- ester compound (C) any combination of the compound (a) represented by the above general formula 1 and the alcohol (b) having an ether bond can be used.
- a monoester conjugate or a diester conjugate is used, but a diester compound is preferred.
- Specific examples include preferably diptoxicetyl adipate and di (butoxyethoxyxyl) adipate, and particularly preferably di (butoxyethoxyxyl) adipate.
- the blending amount of the ester compound (C) with respect to 100 parts by weight of the nitrile group-containing copolymer rubber (A) is preferably 5 to 85 parts by weight, more preferably 15 to 70 parts by weight, and further more preferably. Is 25 to 60 parts by weight. If the amount of the ester compound (C) is too small, the ozone resistance of the crosslinked product is poor, and if too large, the rubber elasticity is sometimes poor.
- the polymer alloy according to the present invention inhibits the effects and objects of the present invention.
- a rubber other than the nitrile group-containing copolymer rubber (A) and a resin other than the acrylic resin (B) may be contained within a range not to impair. The content of these rubbers or resins depends on the nitrile group-containing copolymer rubber (A) and acrylic resin.
- the polymer alloy may have poor gasoline permeation resistance, cold resistance and ozone resistance.
- compounding agents used for general rubbers for example, reinforcing agents such as carbon black and silica; calcium carbonate, magnesium carbonate, clay, kaolin clay, talc, fine powder tanolek, mai power, water Aluminum oxide, Magnesium hydroxide, Caic acid, Magnesium silicate, Aluminum silicate, K Fillers such as calcium acid; metal salts of ⁇ , monounsaturated carboxylic acids; pigments; antioxidants; and the like.
- the polymer alloy according to the present invention is prepared by mixing a nitrile group-containing copolymer rubber ( ⁇ ⁇ ⁇ ⁇ ), an acrylic resin ( ⁇ ⁇ ⁇ ), and a compounding agent, if necessary, with a mixing machine such as a roll or a Bannolly. It can be prepared by a dry blending method in which the components are mixed with each other. Alternatively, it may be prepared by using a latex coprecipitation method in which a nitrile group-containing copolymer rubber ( ⁇ ) and an acrylic resin ( ⁇ ) are mixed and coagulated in a latex state.
- crosslinkable polymer alloy-In the present invention a crosslinkable polymer alloy can be obtained by further adding a crosslinking agent to the above polymer alloy.
- a crosslinking agent include a sulfur-based crosslinking agent, an organic peroxide, and a polyamine-based crosslinking agent.
- Sulfur-based cross-linking agents include sulfur such as powdered sulfur and precipitated sulfur; organic sulfur compounds such as 4,4'-dithiomorpholine tetramethylthiuram disulfide, tetraethylthiuram disulfide, and high molecular polysulfide; Is mentioned.
- Examples of the organic peroxide include dialkyl peroxides, diasil peroxides, and oxyesters.
- Examples of the dialkyl peroxide include dicumyl peroxide, di-tert-butyl peroxide, 2,5-dimethinolate 2,5-di (t-butylperoxy) -13-hexine, and 2,5-dimethyl —2,5-di (t-butylperoxy) hexane and 1,3-bis (t-butylperoxyisopropyl) benzene.
- Benzyl peroxides and isobutyryl peroxides are examples of diacyl peroxides.
- Examples of the hydroxyester include 2,5-dimethyl-12,51-bis (benzoylpropoxy) hexane, t-butylpropyloxyisopropyl carbonate, and the like.
- Table polyamine crosslinking agent is a compound having two or more amino groups, more hydrogen is amino or human hydrazide structure of aliphatic hydrocarbons and aromatic hydrocarbons, in ie one CON HNH 2 Is replaced with the structure shown below.
- Polyamine-based crosslinking agents include aliphatic polyamines, aromatic polyamines, and hydrazide structures. And the like. Examples of aliphatic polyamines include hexamethylenediamine, hexamethylenediamine canolebamate, tetramethylenepentamine, hexamethylenediamine-cinnamaldehyde adduct, hexamethylenediamine-dibenzoate salt, and the like. Is mentioned.
- aromatic polyamines examples include 4,4, -methylenedianiline, 4,4, -oxydiphenylamine, m-phenylenediamine, p-phenylenediamine, 4,4'-methylenebis (o-chloroaniline) and the like. Is mentioned.
- the compound having two or more hydrazide structures include isophthalic dihydrazide, adipic dihydrazide, and sebacic dihydrazide.
- the amount of the cross-linking agent varies depending on the type of the cross-linking agent, but 0.1 to 100 parts by weight of the nitrile group-containing copolymer rubber (A): L 0 parts by weight, preferably 0.3 to 0.3 parts by weight. It is 7 parts by weight, particularly preferably 0.5 to 5 parts by weight. If the amount of the crosslinking agent is too small, the compression set becomes large, and if it is too large, the bending fatigue resistance is poor.
- a crosslinking accelerator is usually used in combination.
- the crosslinking accelerator include zinc white, sulfenamide-based crosslinking accelerator, guanidine-based crosslinking accelerator, thiazole-based crosslinking accelerator, thiuram-based crosslinking accelerator, and dithioate-based crosslinking accelerator. I can do it.
- the amount of the crosslinking accelerator used is not particularly limited, and may be determined according to the use of the crosslinked product, the required performance, the type of the sulfuric acid crosslinking agent, the type of the crosslinking accelerator, and the like.
- crosslinking aid When an organic peracid is used, a crosslinking aid is usually used in combination.
- the crosslinking assistant include triaryl cyanurate, trimethylolpropane trimethacrylate, N, N, 1m-phenylenebismaleimide, and the like. These may be dispersed in clay, calcium carbonate, silica or the like to improve the processability of the polymer alloy.
- the amount of the crosslinking aid used is not particularly limited, and may be determined according to the use of the crosslinked product, the required performance, the type of the crosslinking agent, the type of the crosslinking aid, and the like.
- the method for preparing the crosslinkable polymer alloy according to the present invention is not particularly limited, and may be a known method in which a crosslinking agent is blended with the rubber.
- the compounding of the cross-linking agent is preferably carried out by a method that does not easily generate heat due to shearing so that the bridge does not progress during mixing.
- a crosslinked product can be obtained by heating the crosslinkable polymer alloy to a temperature equal to or higher than the crosslinking start temperature of the crosslinking agent contained in the polymer alloy.
- the crosslinking temperature may be determined according to the properties of the acrylic resin (B). However, in the case of a general crosslinking agent, it is preferably from 100 to 200 ° C., more preferably from 130 to 1 ° C. The temperature is 90 ° C, particularly preferably 140 to 180 ° C. If the temperature is too low, the crosslinking time may be too long or the crosslinking density may be low. If the temperature is too high, molding failure may occur.
- the cross-linking time varies depending on the cross-linking method, cross-linking temperature, shape and the like, but a range of 1 minute or more and 5 hours or less is preferable from the viewpoint of cross-link density and production efficiency. Also, depending on the shape and size of the molding, the surface may be cross-linked, but the inside may not be sufficiently cross-linked, so that secondary cross-linking may be performed.
- the heating method for crosslinking may be appropriately selected from the methods used for crosslinking rubber, such as press heating, steam heating, open heating, and hot air heating.
- the crosslinked product described above has a small gasoline permeation rate, a low embrittlement temperature, and is excellent in ozone resistance. Therefore, it is suitably used as a material for industrial parts such as hoses, velvets, seals and rolls. Specifically, it is suitable as a material for fuel hoses, air intake hoses, air duct hoses, timing velvets, packings, oil seals, OA outlets, automobile interior parts, and the like. Among them, it is particularly suitable as a material for a fuel hose (more preferably, an automotive fuel hose).
- the fuel hose according to the present invention is composed of the above-mentioned crosslinked product.
- the structure is not particularly limited.
- the structure is not limited to a single layer, and may be a multilayer structure having two or more layers including other rubber layers and resin layers.
- automobile fuel hoses include a fuel hose, which is generally referred to as a filler hose, a filler hose, and an inlet hose, which feeds fuel oil from a fuel supply port to a fuel tank; A fuel hose for maintaining the atmospheric pressure; and a fuel hose or a fuel hose for supplying gasoline generated in the fuel tank to the engine.
- a hose called a sillon hose is exemplified.
- the method of manufacturing the fuel hose according to the present invention is not particularly limited, and is manufactured by a conventionally known method.
- the crosslinkable polymer alloy containing the crosslinker described above is formed by injection molding, extrusion molding, or the like.
- the hose is formed into a hose having a predetermined shape by a conventionally known molding method, and cross-linked by a method such as steam cross-linking.
- an acrylic resin (B) was produced as follows. In a reaction vessel, 150 parts of ion-exchanged water, 1.5 parts of potassium oleate, 1.3 parts of ammonium persulfate (polymerization initiator), 98.13 parts of methyl methacrylate, acrylonitrile 1.87 parts were added, and the mixture was reacted for 12 hours at a temperature of 80 ° C. with stirring to terminate the polymerization. As a result of sampling a part of the obtained polymerization reaction liquid and measuring the solid content, the polymerization conversion was 98.3% and the solid concentration was about 39%.
- the obtained ataryl resin (ataryl resin bl) had an atarilonitrile monomer unit amount of 1.87% and was in the form of particles having an average particle diameter of about 0.11 / zm.
- the particle size was measured using a light scattering particle size analyzer (Model N4, manufactured by Coulter, Inc.).
- the particles of the acrylic resin b1 were dissolved in tetrahydrofuran and subjected to gel permeation chromatography to measure polystyrene as a standard substance.
- the weight-average molecular weight was about 1,120,000.
- the polymerization reaction solution is filtered to collect the acrylic resin b1 particles, and washed twice by dispersing in pure water, filtering and collecting.
- the cold resistance (low-temperature properties) is determined by the Geman's torsion test (JIS-K6261) at the temperature at which the specific elastic modulus of the test crosslinked sheet becomes 2, 5, 10, and 100, respectively. T2, ⁇ 5, ⁇ 10, ⁇ 100 Also the unit: C) was evaluated. In this cold-tolerant “I”, the lower the temperature, the better the cold-resistance. The results are shown in Table 1.
- the ozone resistance was evaluated according to JIS-K6259 at 40 ° C, an ozone concentration of 50 pphm, and a 50% elongation at 24 hours, 48 hours, 72 hours, and 144 hours.
- NC No crack is observed.
- A2 B2: Alphabet indicates the number of cracks. B is larger than A, and C is larger than B. Numbers The larger is the larger the size of the crack. Cut: The cracks increased and the test crosslinked sheet was cut. The results are shown in Table 1.
- the gasoline permeation resistance was evaluated by measuring the fuel oil C (a mixture of isooctane and toluene at a volume ratio of 1: 1: Fue 1-C) by the aluminum cup method.
- the aluminum cup method 50 ml of fuel oil C is put into an aluminum cup with a capacity of 100 ml, and this is covered with a 2 mm-thick sheet cut into a disk with a diameter of 61 mm, and the sheet is fastened with a fastener. an area separating the aluminum cup and out was adjusted to so that such a 25.
- the fuel oil resistance was evaluated by immersing the test crosslinked sheet in fuel oil C adjusted to 40 ° C according to JIS-K6258, and calculating the volume swelling AV (unit:%) after 70 hours had passed. .
- Example 1 Except that the amount of acrylonitrile used was changed, the same procedure as in Example 1 was repeated, except that the acrylonitrile monomer unit amount was 9.02%, the average particle size was about 0.12 / m, the weight average molecular weight was 1,250,000, An acrylic resin (acrylic resin b2) having a glass transition temperature of 104 ° C was obtained. A cross-linked sheet having a thickness of 2 mm for a test was prepared in the same manner as in Example 1 using the particles of the acrylic resin b2, and the cold resistance, ozone resistance, gasoline permeation resistance, and fuel oil resistance were evaluated. . The results are shown in Table 1.
- Example 2 Except that the amount of acrylonitrile used was changed, the same procedure as in Example 1 was carried out, except that the acrylonitrile monomer unit amount was 16.5%, the average particle size was about 0.1 ⁇ m, the weight average molecular weight was 1,170, An acrylic resin (acrylic resin b3) having a glass transition temperature of 000 and a temperature of 103 ° C was obtained. Using the particles of acrylic resin b3, a cross-linked sheet with a thickness of 2 mm was prepared for the test in the same manner as in Example 1, and the cold resistance, ozone resistance, gasoline resistance, and fuel oil resistance were evaluated. did. The results are shown in Table 1. Comparative example
- Example 1 Except that acrylonitrile was not used, in the same manner as in Example 1, the average particle size was about 0.12 ⁇ m, the weight average molecular weight was 1,2200,000, and the glass transition temperature was 105 ° C.
- An acrylic resin (acrylic resin b 4) containing no acrylonitrile monomer unit was obtained.
- a cross-linked sheet having a thickness of 2 mm for a test was prepared in the same manner as in Example 1 to obtain cold resistance, ozone resistance, gasoline transmission resistance, and resistance to gasoline.
- the fuel oil properties were evaluated. The results are shown in Table 1.
- Example 1 Except that the amount of acrylonitrile used was changed, the same procedure as in Example 1 was repeated, except that the amount of the acrylonitrile monomer unit was 27.7%, the average particle diameter was about 0.1 ⁇ m, and the weight average molecular weight was 1,18.
- Using the particles of acrylic resin b5 a cross-linked sheet with a thickness of 2 mm for the test was prepared in the same manner as in Example 1 to evaluate cold resistance, ozone resistance, gasoline resistance, and fuel oil resistance. did. The results are shown in Table 1.
- Example 2 Except that the amount of acrylonitrile used was changed, the same procedure as in Example 1 was carried out, except that the acrylonitrile monomer unit amount was 9.3%, the average particle diameter was about 0.11 m, and the weight average molecular weight was 1,240,0. An acrylic resin (acrylic resin b 6) having a glass transition temperature of 104 ° C. was obtained.
- an acrylotrile-butadiene copolymer rubber (mu-one viscosity: 90) having an atarilonitrile monomer unit amount of 46% was used.
- Comparative Examples 1 and 2 in which the content of the acrylonitrile monomer unit in the methyl methacrylate polymer was out of the range of the present invention, were excellent in cold resistance and fuel oil resistance. However, cracks had already occurred in a short time of up to 72 hours, and it was confirmed that the ozone resistance was not sufficient. Further, in Comparative Example 2, it was confirmed that the gasoline transmission resistance also tends to deteriorate.
- Examples 1 to 5 in which the content of the acrylo-tolyl monomer unit in the methyl methacrylate polymer is within the range of the present invention show the cold resistance, the gasoline resistance and the fuel oil resistance. In addition, it was confirmed that cracks did not occur even under severe conditions of 50% elongation, and that it had excellent ozone resistance.
- Example 3 The same procedure as in Example 3 was carried out except that the amount of the acrylonitrile-butadiene copolymer rubber was changed to 45 parts and the amount of the polymer b3 was changed to 55 parts.
- a bridge sheet was prepared and evaluated for cold resistance, ozone resistance, gasoline permeation resistance, and fuel oil resistance. In all cases, almost the same results as in Example 3 were obtained.
- Example 3 The same procedure as in Example 3 was repeated except that the amount of the acrylonitrile-butadiene copolymer rubber was changed to 85 parts and the amount of the polymer b3 was changed to 15 parts.
- a bridge sheet was prepared and evaluated for cold resistance, ozone resistance, gasoline permeation resistance, and fuel oil resistance. In all cases, almost the same results as in Example 3 were obtained.
- a 2 mm thick test frame was prepared in the same manner as in Example 3 except that the amount of the acrylonitrile-butadiene copolymer rubber was 35 parts and the amount of the polymer 3 was 65 parts.
- Bridge sheets were prepared and evaluated for cold resistance, ozone resistance, gasoline permeation resistance and fuel oil resistance. As a result, in each case, almost the same results as in Example 3 were obtained, but the rubber elasticity tended to be lost.
- a 2 mm-thick crosslink for testing was performed in the same manner as in Example 3 except that the amount of the acrylonitrile-butadiene copolymer rubber in Example 3 was 95 parts and the amount of the polymer b3 was 5 parts. Sheets were prepared and evaluated for cold resistance, ozone resistance, gasoline permeation resistance and fuel oil resistance Valued. As a result, almost the same results as in Example 3 were obtained for the cold resistance, the gasoline permeation resistance, and the fuel oil resistance, but the ozone resistance tended to decrease.
- Example 3 As described above, from the results of Example 6, Example 7, Comparative Example 3 and Comparative Example 4, the polymer alloy (Comparative Example 3) in which the content of the ataryl resin (B) exceeds 60% is inferior in rubber elasticity. In contrast, a polymer alloy having an acrylic resin content of less than 10% (Comparative Example 4) has reduced ozone resistance.
- the polymer alloy of the present invention in which the content of the acrylic resin (B) is in the range of 10 to 60% is excellent in cold resistance, ozone resistance, gasoline resistance and fuel oil resistance ( Example 6 and Example 7). Industrial applicability
Abstract
Description
Claims
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US10/526,085 US20050245683A1 (en) | 2002-08-29 | 2003-08-28 | Polymer alloy, crosslinked articles, and fuel hoses |
EP03791371A EP1548056A1 (en) | 2002-08-29 | 2003-08-28 | Polymer alloy, crosslinked articles, and fuel hoses |
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JP2002-250771 | 2002-08-29 | ||
JP2002250771A JP4032883B2 (ja) | 2002-08-29 | 2002-08-29 | ポリマーアロイ、架橋物および燃料ホース |
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US (1) | US20050245683A1 (ja) |
EP (1) | EP1548056A1 (ja) |
JP (1) | JP4032883B2 (ja) |
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WO (1) | WO2004020516A1 (ja) |
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US20050070667A1 (en) * | 2001-11-30 | 2005-03-31 | Takashi Toya | Rubber vulcanizate, process for its production, and polymer composition, rubber composition and vulcanizable rubber composition used in the process |
US20060281865A1 (en) * | 2003-06-27 | 2006-12-14 | Shinji Komiyama | Polymer alloy, crosslinked object, and fuel hose |
JP2006170343A (ja) * | 2004-12-16 | 2006-06-29 | Mitsubishi Motors Corp | 自動車用ホース |
JP2006335784A (ja) * | 2005-05-31 | 2006-12-14 | Jsr Corp | 耐油耐候性ゴム組成物及びその成形品 |
CN103724701A (zh) * | 2013-12-16 | 2014-04-16 | 芜湖万润机械有限责任公司 | 一种汽车制动软管里芯胶料 |
CN114274683A (zh) * | 2021-12-27 | 2022-04-05 | 湖南鼎一致远科技发展有限公司 | 一种用于交通印刷的耐汽油性的树脂碳带及其制备方法 |
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JPH09208747A (ja) * | 1996-01-31 | 1997-08-12 | Nippon Zeon Co Ltd | ゴム組成物および耐熱電線被覆材 |
JP2001288303A (ja) * | 2000-04-10 | 2001-10-16 | Nok Corp | 過酸化物架橋性ゴム組成物 |
JP2003026861A (ja) * | 2001-07-13 | 2003-01-29 | Jsr Corp | 耐油耐候性ゴム用組成物及び耐油耐候性ゴム |
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US3607981A (en) * | 1969-10-28 | 1971-09-21 | Goodrich Co B F | Nitrile rubbers |
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- 2003-08-28 US US10/526,085 patent/US20050245683A1/en not_active Abandoned
- 2003-08-28 CN CNA03824568XA patent/CN1688653A/zh active Pending
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JPH09208747A (ja) * | 1996-01-31 | 1997-08-12 | Nippon Zeon Co Ltd | ゴム組成物および耐熱電線被覆材 |
JP2001288303A (ja) * | 2000-04-10 | 2001-10-16 | Nok Corp | 過酸化物架橋性ゴム組成物 |
JP2003026861A (ja) * | 2001-07-13 | 2003-01-29 | Jsr Corp | 耐油耐候性ゴム用組成物及び耐油耐候性ゴム |
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EP1548056A1 (en) | 2005-06-29 |
CN1688653A (zh) | 2005-10-26 |
US20050245683A1 (en) | 2005-11-03 |
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