Classifications

• • 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
  • C08K5/13—Phenols; Phenolates
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
• • 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
  • C08K5/34—Heterocyclic compounds having nitrogen in the ring
  • C08K5/3442—Heterocyclic compounds having nitrogen in the ring having two nitrogen atoms in the ring
• • 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
  • C08K5/34—Heterocyclic compounds having nitrogen in the ring
  • C08K5/3442—Heterocyclic compounds having nitrogen in the ring having two nitrogen atoms in the ring
  • C08K5/3445—Five-membered rings
  • C08K5/3447—Five-membered rings condensed with carbocyclic rings
• • 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
  • C08K5/34—Heterocyclic compounds having nitrogen in the ring
  • C08K5/3442—Heterocyclic compounds having nitrogen in the ring having two nitrogen atoms in the ring
  • C08K5/3462—Six-membered rings
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
  • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
  • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
  • Y10T428/1393—Multilayer [continuous layer]

Definitions

• the present invention relates to a crosslinkable composition containing a fluororubber, a crosslinking agent and an additive, a laminate including a rubber layer formed from the composition, and a hose.
• Fluoro rubber exhibits excellent chemical resistance, solvent resistance, and heat resistance, and is therefore widely used in various fields such as the automotive industry, semiconductor industry, and chemical industry.
• automotive industry Is used as hoses and sealing materials for engines and peripheral devices, AT devices, fuel systems and peripheral devices.
• these fluororubber materials also have various characteristics such as aging resistance, weather resistance, processability, oil resistance, fuel oil resistance, and fuel permeability. It is the present situation that is strictly demanded.
• fluororubber exhibits the above-mentioned excellent characteristics, its price is 10 to 20 times that of ordinary rubber materials, and there is a problem with cold resistance.
• acrylic-tolyl-butadiene copolymer rubber which has been used as a hose for fuel oil, is inferior to fluoro rubber in terms of various properties such as heat resistance, oil resistance, and aging resistance. There was a need for improvement.
• hoses having a non-fluorine rubber power such as epichlorohydrin rubber have been developed that use fluororubber thinly as an inner layer and outer layer such as epichlorohydrin rubber.
• fluororubber and non-fluororubber strength also improve the problems such as cost and cold resistance
• non-fluororubbers such as fluororubber and epichlorohydrin rubber have practical problems with poor adhesion. .
• the present invention provides a crosslinkable composition containing a fluororubber, a crosslinking agent, and an additive, a laminate including a rubber layer formed from the composition, and a hose.
• the present invention is a crosslinkable composition
• a crosslinking agent comprising fluororubber, a crosslinking agent and an additive, wherein the additive is represented by the general formula (1):
• R 3 is the same force or different, each being a hydrogen atom or a monovalent organic group having 1 to 30 carbon atoms, and X 1 — is a monovalent anion
• n is an integer of 0 to 50
• a crosslinkable composition that is one or more compounds selected from the group consisting of compounds represented by:
• a crosslinking accelerator is further contained.
• the crosslinking agent is preferably a polyol-based crosslinking agent.
• the fluororubber is a fluororubber containing a bilidene fluoride unit.
• Fluorine rubbers are preferably fluorine content 65 wt 0/0 or more fluorine rubber.
• a rubber layer formed from the crosslinkable composition and a non-fluorine rubber layer formed from a non-fluorine rubber composition containing a non-fluorine rubber and a crosslinking agent are crosslinked and bonded. It is related with the laminated body formed.
• the non-fluorine is preferably epichlorohydrin rubber.
• the present invention relates to a hose including the laminate.
• the present invention is a crosslinkable composition
• a crosslinkable composition comprising fluororubber, a crosslinking agent, and an additive
• the additive is represented by the general formula (1):
• R 3 is the same force or different, each being a hydrogen atom or a monovalent organic group having 1 carbon atom, and X 1 — is a monovalent anion
• n is an integer of 0 to 50
• a crosslinkable composition that is one or more compounds selected from the group consisting of compounds represented by:
• Examples of the fluoro rubber used in the present invention include non-perfluoro fluoro rubber (a-1) and perfluoro fluoro rubber ( a -2). Note that the perfluoro fluorine-containing rubbers, among the configuration units, refers to the 90 mole 0/0 or consisting par full O b monomer.
• Non-perfluorofluorororubber ( a -1) includes bi-lidene fluoride (VdF) fluororubber, tetrafluoroethylene (TFE) Z propylene fluororubber, tetrafluoroethylene (TFE ) Z-propylene Z-vinylidene fluoride (VdF) fluoro rubber, ethylene / hexafluoropropylene (HFP) fluoro rubber, ethylene Z-hexafluoropropylene (HFP) Z bi-redene fluoride (VdF) ) Based fluoro rubber, ethylene Z hexafluoropropylene (HFP) Z tetrafluoroethylene (TFE) based fluoro rubber, fluorosilicone fluoro rubber, or fluorophosphazene based fluoro rubber, etc.
• VdF bi-lidene fluoride
• TFE tetrafluoroethylene
• VdF biridene fluoride
• TFE tetrafluoroethylene
• VdF fluororubber is preferably represented by the following general formula (4).
• the structural unit M 1 is a structural unit derived from berylidene fluoride (m 1 )
• the structural unit M 2 is a structural unit derived from a fluorine-containing ethylenic monomer (m 2 ).
• N 1 is a repeating unit derived from the monomer (m 1 ) and the monomer (n 1 ) copolymerizable with the monomer (m 2 ).
• the structural unit N 1 is preferably 0 to 10 mol% with respect to the total amount of the structural unit M 1 and the structural unit M 2 .
• the fluorine-containing ethylenic monomer (m 2 ) may be a single type or a combination of two or more types.
• TFE tetrafluoroethylene
• CT FE black trifluoroethylene
• HFP trifluoropropylene
• tetrafluoropropylene tetrafluoropropylene
• pentafluoropropylene trifluorobutene
• tetrafluoroisobutene perfluoro (alkyl butyl ether)
• PAVE power that can be given to fluorine-containing monomers such as fluorinated bure
• tetrafluoroethylene, hexafluoropropylene, and perfluoro (alkyl butyl ether) are preferable.
• the monomer (n 1 ) may be any monomer (m 1 ) and any monomer that can be copolymerized with the monomer (m 2 ).
• ethylene, propylene, alkyl For example, bull ether.
• VdF fluoride (VdF) fluorororubber examples include VdF-HFP rubber, VdF-HFP-TFE rubber, VdF-CTFE rubber, VdF-CTFE-TFE. Preferred are rubbers.
• TFE Z propylene-based fluororubber those represented by the following general formula (5) are preferable.
• the structural unit M 3 is a structural unit derived from tetrafluoroethylene (m 3 )
• the structural unit M 4 is a structural unit derived from propylene (m 4 )
• the structural unit N 2 is a single unit. body (m 3) and the single-mer (m 4) and copolymerizable monomer (n 2) is a repeating unit derived from)
• the structural unit M 3 and 40 to 70 mole 0/0 the structural unit M more preferably Sig is preferred to include 4 60-30 mol% structural units M 3 50-60 mole 0/0, which is a structural unit M 4 50 to 40 mole 0/0 Dressings containing.
• the structural unit N 2 is preferably 0 to 40 mol% based on the total amount of the structural unit M 3 and the structural unit M 4 ! /.
• V may be used as long as it is copolymerizable with the monomer (m 3 ) and the monomer (m 4 ).
• Examples of the monomer that gives such a crosslinking site include perfluoro (6, 6 dihydro-l-6-iodo-3 oxamine) described in JP-B-5-63482 and JP-A-7-316234. 1) iodine-containing monomers such as 1-hexene) and perfluoro (5-3 oxa 1 pentene), benzene-containing monomers described in JP-A-4-505341, JP-A-4-505345, Examples thereof include a cyano group-containing monomer, a carboxyl group-containing monomer, and an alkoxycarboxyl group-containing monomer as described in JP-A-5-500070.
• perfluoro fluorine rubber (a-2) those represented by the following general formula (6) are preferable.
• structural unit M 5 is a structural unit derived from tetrafluoroethylene (m 5 )
• structural unit M 6 is a structural unit derived from perfluoro (alkyl butyl ether) (m 6 ).
• N 3 is a repeating unit derived from monomer (m 5 ) and monomer (n 3 ) copolymerizable with monomer (m 6 )
• the structural unit M 5 50 to 90 mol% instrument the structural unit M 5 50 to 80 mole 0/0, which the structural unit M 6 comprising 20 to 50 mole 0/0, further preferred Properly structural unit M 5 and 55 to 70 mole 0/0, in which the structural unit M 6 comprising 30 to 45 mole 0/0.
• the structural unit N 3 is preferably 0 to 5 mol%, more preferably 0 to 2 mol%, based on the total amount of the structural unit M 5 and the structural unit M 6 .
• perfluoro (alkyl butyl ether) examples include perfluoro (methyl butyl ether) and perfluoro (propyl butyl ether), and these may be used alone or in any combination. Can do.
• any monomer (m 5 ) or monomer (m 6 ) can be copolymerized with the monomer (m 5 )! However, monomers that give cross-linking sites are preferred.
• Monomers that give such a crosslinking site include, for example, bi-lidene fluoride, general formula (7):
• CY 1 CY 1 -R 1 CHR 4 X 2 (7)
• Y 1 represents a hydrogen atom, fluorine atom or —CH
• R 1 represents a fluoroalkylene group
• R 4 is a hydrogen atom or —CH
• X 2 is iodine atom or bromine atom
• X 3 is a cyano group, a carboxyl group, an alkoxycarbonyl group, a bromine atom
• strong perfluorinated rubber examples include WO97Z24381 pamphlet, JP-B 61-57324, JP-B 4-81608, JP-B 5-
• Examples thereof include fluororubber described in Japanese Patent No. 13961.
• the fluororubber ( a ) is preferably used with a number average molecular weight of 30000 to 120,000.
• the non-perfluoro fluorine rubber (a-1) and the perfluoro fluorine rubber (a -2) can be produced by a conventional method, but since the obtained polymer has a narrow molecular weight distribution and the molecular weight can be easily controlled, a known iodine transfer polymerization method is preferred as a method for producing fluororubber.
• An example is a method in which emulsion polymerization is carried out in the presence of a radical initiator while stirring the polymer under pressure.
• Representative examples of iodine compounds used include, for example, general formula (9):
• R 5 is a saturated or unsaturated fluorohydrocarbon group having 1 to 16 carbon atoms. Or a chlorofluorocarbon group or a hydrocarbon group having 1 to 3 carbon atoms, which may contain an oxygen atom).
• An iodine atom or a bromine atom is introduced into the terminal of the fluorine-containing rubber obtained by using such an iodine compound.
• the compound represented by the general formula (9) includes, for example, 1, 3 jodo perfluoropropane, 1,3 jodo 2 black mouth perfluoropropane, 1,4 jodo perfluoro Butane, 1, 5 Jodo 2, 4 Dichro mouth perfluoropentane, 1, 6 Jodhpur fluor mouth hexane, 1, 8 Jodh per fluoroctane, 1, 12 Jodh per fluor decane, 1, 16 Jodh per ful Hexadecane, Jodomethane, 1, 2 Jodoethane, 1, 3 Jodo, n-propane, CF Br, BrCF CF Br ⁇ CF CFBrCF
• the radical polymerization initiator used in the present invention may be the same as that conventionally used for the polymerization of fluorinated rubber.
• These initiators include organic and inorganic peroxides and azo compounds.
• Typical initiators include persulfates, peroxycarbonates, peroxyesters, and the like.
• Preferred initiators include ammonium persulfate (APS). APS can be used alone or in combination with a reducing agent such as sulfite or sulfite.
• a wide range of emulsifiers can be used for the emulsion polymerization. From the viewpoint of suppressing a chain transfer reaction to the emulsifier molecules during the polymerization, a fluorocarbon chain or a fluoropolyether chain is used. Desirable salts of carboxylic acids having The amount of emulsifier used is preferably about 0.05 to 2% by weight of the added water, and more preferably 0.2 to 1.5% by weight.
• the monomer mixed gas used in the present invention is the same as that of G. H. Kalb et al.
• the polymerization pressure can be varied within a wide range. Generally, it is in the range of 0.5-7 MPa. The higher the polymerization pressure, the higher the polymerization rate. From the viewpoint of improving productivity,
• It is preferably 8 MPa or more.
• the addition amount of the compound represented by the general formula (9) is preferably 0.0001 to 5% by weight of the total weight of the obtained fluororubber. 0.01 to 1% by weight % Is more preferred.
• fluorine-containing silicone elastomers can also be used, and examples thereof include fluorosilicone rubber.
• a composition comprising the fluororubbers (a-1) and (a-2) as described above and a thermoplastic fluororubber can be used.
• the fluororubber in view of heat resistance, compression set, workability, and cost, it is preferable that the fluororubber contains VdF units. VdF-based fluororubber is more preferable.
• VdF—HFP TFE rubber is especially preferred.
• a fluororubber containing a peroxide-crosslinkable VdF unit is used from the standpoint of adhesiveness with a non-fluororubber layer in which a non-fluororubber composition strength is also formed. More preferred.
• the fluorororubber containing a peroxide-crosslinkable VdF unit is a fluororubber containing a VdF unit, more preferably a VdF-based fluororubber having a crosslinkable site capable of peroxide crosslinking, Examples of the crosslinking site include an iodine atom, a bromine atom, a cyano group, a carboxyl group, and an alkoxycarbonyl group.
• fluororubber those described above are not limited to one type, and two or more types may be used.
• the fluorine rubber used in the present invention it is preferred more that a fluorine content of 65 wt 0/0 or more fluorine rubber is preferable instrument fluorine content of 68 wt% or more of fluorine rubber That's right.
• the upper limit of the fluorine content is not particularly limited, but it is preferably 74% by weight or less. If the fluorine content is less than 65% by weight, chemical resistance, fuel oil resistance and fuel permeability tend to be poor.
• the crosslinkable composition of the present invention is obtained by blending the fluororubber with a crosslinking agent. Moreover, a crosslinking accelerator can be used together with a crosslinking agent.
• cross-linking agent and the cross-linking accelerator are used for cross-linking fluororubber.
• crosslinking means that the same or different polymer chains of fluororubber are cross-linked by a cross-linking agent. By cross-linking in this way, the fluororubber has improved tensile strength and good elasticity. It will have.
• the crosslinking accelerator is different from the additive carotenant represented by the general formulas (1) to (3).
• the cross-linking system used in the present invention may be appropriately selected depending on the type of cure site or the use of the obtained laminate.
• the cross-linking agent deviation of a polyol-based cross-linking agent, a peroxide-based cross-linking agent, and a polyamine-based cross-linking agent can be employed.
• the cross-linked fluororubber obtained by cross-linking with a polyol-based cross-linking agent has a carbon-oxygen bond at the cross-linking point, and is characterized by excellent moldability with a small compression set. Therefore, it is suitable for the hose of the present invention.
• a cross-linked fluororubber formed by crosslinking with a peroxide-based cross-linking agent has carbon Since it has an elementary bond, it has superior chemical resistance and steam resistance compared to polyol-based crosslinking having a carbon-oxygen bond at the crosslinking point and polyamine-based crosslinking having a carbon-nitrogen double bond. There is a special feature!
• Cross-linked fluororubber obtained by cross-linking with a polyamine-based cross-linking agent has a carbon-nitrogen double bond at the cross-linking point, and is characterized by excellent dynamic mechanical properties.
• the compression set tends to be larger than that of a crosslinked fluorine rubber crosslinked with a polyol-based crosslinking agent or a peroxide-based crosslinking agent.
• crosslinkable composition of the present invention it is preferable to use a polyol-based crosslinking agent from the viewpoint of adhesiveness to the non-fluororubber layer.
• cross-linking agent in the present invention polyamine-based, polyol-based and peroxide-based cross-linking agents generally known for fluoro rubbers can be used.
• polyamine-based crosslinking agent examples include hexamethylenediamine carbamate, N, N, dicinnamylidene 1,6 hexamethylenediamine, 4, 4'-bis (aminocyclohexyl).
• Polyamine compounds such as methane power rubamate. Of these, N, N, dicinnamylidene 1, 6 hexamethylenediamine is preferred!
• polyol-based cross-linking agent a compound conventionally known as a cross-linking agent for fluororubber can be used.
• polyhydroxy compounds particularly polyhydroxy from the viewpoint of excellent heat resistance.
• Aromatic compounds are preferably used.
• the polyhydroxy aromatic compound is not particularly limited.
• 2, 2 bis (4 hydroxyphenol) propane hereinafter referred to as bisphenol A
• Perfluoropropane hereinafter referred to as bisphenol AF
• resorcin 1,3 dihydroxybenzene, 1,7 dihydroxynaphthalene, 2,7 dihydroxynaphthalene, 1,6 dihydroxynaphthalene, 4,4'-dihydroxydiphenyl 4, 4 'dihydroxystilbene, 2, 6 dihydroxyanthracene, hydroquinone, catechol, 2, 2-bis (4-hydroxyphenol) butane (hereinafter referred to as bisphenol B), 4, 4-bis (4— Hydroxyphenol) valeric acid, 2, 2 bis (4 hydroxyphenol) tetrafluorodiclonal propane, 4, 4, dihydroxydiphenol Ninoles norephone, 4, 4, dihydroxydiphenyl ketone, tri (4-hydroxyphenol) methane, 3, 3 ', 5, 5, monote
• a crosslinking agent for peroxide-based crosslinking a compound having a reaction activity with respect to a peroxide radical and a polymer radical may be used.
• a compound having a reaction activity with respect to a peroxide radical and a polymer radical may be used.
• CH CH-
• CH CH-
• the polyhydroxy aromatic compound is preferred because the cross-linked fluororubber has a small compression set and is excellent in moldability, and the polyhydroxy compound is preferable in heat resistance.
• Bisphenol AF is more preferred.
• the blending amount of the cross-linking agent is 0.2 to 100 parts by weight of fluororubber, preferably LO parts by weight, 0.5 to 6 parts by weight, more preferably 1 to 5 parts by weight. Further preferred. If the crosslinking agent is less than 0.2 parts by weight, the crosslinking density tends to be low and the compression set tends to be large. If the crosslinking agent exceeds 10 parts by weight, the crosslinking density becomes too high, and it tends to crack during compression. Tend.
• a crosslinking accelerator in combination with a polyol-based crosslinking agent.
• Use of a crosslinking accelerator in the dehydrofluorination reaction of the fluororubber main chain Can promote the crosslinking reaction by promoting the formation of intramolecular double bonds
• a crosslinking accelerator for polyol-based crosslinking a compound having a property that is difficult to be added to the fluororubber main chain is preferred, and an organic compound is generally used.
• an organic compound is generally used.
• the onium compound includes an ammonium compound such as a quaternary ammonium salt, a phosphonium compound such as a quaternary phosphonium salt, and an oxo-um.
• an ammonium compound such as a quaternary ammonium salt
• a phosphonium compound such as a quaternary phosphonium salt
• an oxo-um Compounds, sulfo-compounds, cyclic amines, monofunctional amine compounds, and the like. Among these, quaternary ammonium salts and quaternary phosphonium salts are preferred.
• the quaternary ammonium salt is not particularly limited.
• DBU-B is preferable from the viewpoint of the crosslinkability and the physical properties of the cross-linked product.
• the quaternary phospho-um salt is not particularly limited, and examples thereof include tetrabutyl phospho-um chloride, benzyl triphenyl phospho-um chloride (hereinafter referred to as BTPPC), benzyl trimethyl phospho-um chloride, Benzyl tributyl phosphor chloride, tributyl aryl phosphor chloride, tributyl 2-methoxypropyl phosphor chloride, N-diphenyl (dimethylamino) phosphomum chloride and the like.
• BTPPC benzyl triphenyl phosphomum chloride
• BTPPC benzyl triphenyl phosphomum chloride
• a crosslinking accelerator a quaternary ammonium salt, a solid solution of a quaternary phosphonium salt and bisphenol AF, a chlorine-free crosslinking disclosed in JP-A-11-147891 Accelerators can also be used.
• any organic peroxide that can easily generate a hydroxy radical in the presence of heat or a redox system may be used.
• the amount of the crosslinking accelerator is 0.1 to 2.0 parts by weight, preferably S, and more preferably 0.1 to 1.5 parts by weight with respect to 100 parts by weight of the fluororubber. 1 to 0.7 parts by weight are more preferable. If the blending amount of the crosslinking accelerator is less than 0.1 parts by weight, the crosslinking rate becomes slow and the productivity tends to deteriorate. If the amount exceeds 2.0 parts by weight, the crosslinking rate becomes too fast and the scorch or molding is performed. There is a tendency that defects are likely to occur.
• n is an integer from 0 to 50
• R 2 and R 3 are the same or different and are each a hydrogen atom or a monovalent organic group having 1 to 30 carbon atoms.
• the monovalent organic group having 1 to 30 carbon atoms is particularly limited.
• examples include aliphatic hydrocarbon groups, aryl groups such as phenyl groups, and benzyl groups.
• char such as —CH 1, 1 CH, 1 CH
• X 4 is a fluorine atom, a chlorine atom, a bromine atom or an iodine atom
• X 4 is a fluorine atom, a chlorine atom, a bromine atom or an iodine atom
• a phenyl group a —CF , 1 CH CF, etc.
• CF 1 to 5 hydrogen atoms in CF such as (CF), 1 CH CH (CF) (n is an integer of 1 to 5) And a phenyl group or a benzyl group in which is substituted. Also,
• it may contain a nitrogen atom.
• R 3 is preferably an alkyl group having 1 to 20 carbon atoms or a benzyl group.
• X 1 — in the general formula (1) is a monovalent anion, which is a halogen ion (F—, Cl—, Br—, I ”), OH—, RO—, RCOO—, CHO—. , SO 2 —, SO 2 —, SO—, RSO 2 —, CO 2 —, NO— (R is monovalent)
• cr is preferable.
• a compound represented by the following is preferable.
• n is an integer of 0 to 50. From the viewpoint of dispersibility when kneaded with fluororubber, it is more preferably an integer of 0 to 1. Even more preferred is an integer of 5.
• the general formula (1) is used because of its good adhesion to the non-fluorine rubber layer formed from the non-fluorine rubber composition.
• the compounds shown are preferred.
• the amount of the additives represented by the general formulas (1) to (3) is 0.01 to 10 weight repulsive force S to 100 parts by weight of fluororubber, preferably 0.05 to 5 weights.
• the repulsive force S is preferable, and 0.05 to 2 parts by weight is more preferable. If the additive is less than 0.01 parts by weight, it will adhere to the non-fluororubber layer. When the amount exceeds 10 parts by weight, the elongation of the fluororubber layer after crosslinking tends to be inferior.
• crosslinkable composition for example, fillers, processing aids, plasticizers, colorants, stabilizers, adhesion assistants, acid acceptors, release agents , Conductivity imparting agent, thermal conductivity imparting agent, surface non-adhesive agent, flexibility imparting agent, heat resistance improver, flame retardant, etc.
• agents or crosslinking accelerators may be added.
• the crosslinkable composition of the present invention comprises a fluororubber, a crosslinking agent, additives represented by the general formulas (1) to (3), and, if necessary, other compounding agents such as a crosslinking accelerator and a filler. It can be obtained by kneading using a generally used rubber kneading apparatus. As the rubber kneading apparatus, a roll, a kneader, a Banbury mixer, an internal mixer, a twin screw extruder, or the like can be used.
• the crosslinking agent 'crosslinking accelerator when a polyhydroxy compound is used as the crosslinking agent, the crosslinking agent 'crosslinking accelerator often has a relatively high melting point. -Kneading while melting at a high temperature of 120 to 200 ° C using a closed kneading machine such as a kneader, and then kneading other compounding agents such as fillers at a relatively low temperature below this The method is preferred. There is also a method in which a cross-linking agent and a cross-linking accelerator are once melted and uniformly dispersed using a solid solution in which the melting point is lowered.
• the mixture is brought to room temperature. Dispersibility can be further improved by kneading again after standing for 12 hours or more.
• a rubber layer formed from the crosslinkable composition and a non-fluororubber layer formed from a non-fluorine rubber composition containing a non-fluorine rubber and a cross-linking agent are crosslinked and adhered. It is related with the laminated body formed.
• the non-fluorine rubber of the non-fluorine rubber yarn and the composition is not particularly limited, but butadiene acrylonitrile rubber, styrene butadiene rubber, polychloroprene, ethylene propylene termonomer copolymer, chlorinated polystyrene. , Chlorosulfonated polystyrene, silicone rubber, butyl rubber, epichlorohydrin rubber, acrylic rubber, ethylene Examples include butyl acetate copolymer, a, j8-unsaturated-tolyl-conjugated diene copolymer rubber, and hydrides thereof. Of these, epichlorohydrin rubber is used from the viewpoint of fuel oil resistance and heat resistance. Preferably there is. From the viewpoint of heat resistance and oil resistance, butadiene-acrylonitrile rubber is preferable.
• any cross-linking agent used for ordinary non-fluorinated rubber can be used.
• crosslinkers such as xio crosslinkers, peroxide crosslinkers, polythiol crosslinkers, quinoid crosslinkers, resin crosslinkers, metal oxides, diamine crosslinkers, polythiols, and 2 mercaptoimidazolines.
• diamine type, polythiols, 2-mercaptoimidazoline and the like are preferable from the viewpoint of adhesive properties.
• the blending amount of the crosslinking agent is preferably 0.2 to: LO parts by weight, more preferably 0.5 to 8 parts by weight with respect to 100 parts by weight of the non-fluororubber. If the crosslinking agent is less than 0.2 parts by weight, the crosslinking density tends to be low and compression set tends to increase. If the crosslinking agent exceeds 10 parts by weight, the crosslinking density becomes too high, and it tends to crack during compression. Tend.
• the non-fluororubber composition may contain an accelerator and the like, and, in addition, an acid acceptor, a reinforcing agent, a filler, An acid mixture commonly used in the technical field such as a plasticizer and an antioxidant can be added.
• Accelerators include aldehyde amines, aldehyde ammonias, thioreas, thiazoles, thiophenamides, thiolams, dithio rubamates, 1, 8 diazabicyclo [5, 4, 0] -7 undecene (DBU), weak acid salts of DBU, etc.
• weak acid salts of DBU include carbonates, long-chain aliphatic carboxylates, aromatic carboxylates, phenol salts, phenol succinates and the like from the viewpoint of handling.
• Can include DBU carbonate, DBU stearate, DBU sorbate, DBU benzoate, DBU naphthoate, DBU phenolate.
• the non-fluorinated rubber composition can be obtained by kneading using a commonly used rubber kneading apparatus.
• a crosslinkable composition containing a fluororubber containing a peroxide-crosslinkable VdF unit and a polyol crosslinker when used, a rubber layer formed from the crosslinkable composition, a non-fluorine rubber and a peroxide A non-fluorine rubber composition containing a cross-linking agent is formed on a non-fluorine rubber composition.
• the laminate in which the base rubber layer is cross-linked and bonded it is preferable in terms of improving the adhesion between the rubber layer and the non-fluororubber layer.
• the lamination method of the laminate of the present invention is not particularly limited, and a normal lamination method can be used.
• the crosslinkable composition of the present invention and the non-fluororubber composition are co-extruded in two layers by an extruder, or the outer layer is extruded onto the inner layer by two extruders, thereby causing the inner layer and the outer layer to be extruded.
• An inner tube rubber layer composed of layers is formed, and the outer tube rubber layer is further extruded by an extruder and integrated, and then crosslinked and bonded.
• the crosslinking conditions may be determined as appropriate depending on the type of the crosslinking agent used, but the firing is usually performed at a temperature of 150 to 300 ° C for 1 minute to 24 hours.
• crosslinking method not only a conventionally used method such as steam crosslinking, but also under normal pressure, increased pressure, reduced pressure, and in air, under any conditions. Even V, a crosslinking reaction can be performed.
• the non-fluorine rubber composition has excellent adhesion to the formed non-fluorine rubber layer and is resistant to chemicals. It is a laminate that combines heat resistance, oil resistance, heat resistance, and cold resistance, and is useful as a hose, and is particularly useful as a hose for automobile engines and peripheral devices, AT devices, fuel systems, and peripheral devices.
• the use of the crosslinkable yarn according to the present invention is not particularly limited.
• the seal material used for the engine body of the automobile engine is not particularly limited.
• gaskets such as cylinder head gasket, cylinder head cover gasket, oil pan packing, general gasket, O-ring, packing, timing Examples include sealing materials such as belt cover gaskets.
• the seal material used in the main motion system of the automobile engine is not particularly limited, and examples thereof include shaft seals such as a crankshaft seal and a camshaft seal.
• the seal material used in the valve train of an automobile engine is not particularly limited, and examples thereof include a valve stem oil seal of an engine valve.
• the sealant used in the cooling system of the lubricant for the automobile engine is not particularly limited, and examples thereof include a seal gasket of an engine oil cooler.
• the seal material used in the engine fuel system for automobiles is not particularly limited.
• the fuel tube connector O-link such as a fuel pump oil seal, a fuel tank filler seal, and a tank knocker.
• the seal material used in the intake and exhaust system of an automobile engine is not particularly limited.
• a hold intake manifold seal, an exhaust hold packing, and a throttle throttle examples include body packing and turbocharged turbine shaft seals.
• the seal material used in the transmission system of the automobile engine is not particularly limited.
• a transmission-related bearing seal for example, a transmission-related bearing seal, an oil seal, an O-ring, a knock, etc., an O-ring of an automatic transmission. , Knockins and the like.
• the seal material used for the brake system of the automobile engine is not particularly limited, but includes, for example, a piston cup (rubber cup) of a master cylinder, a piston cup (rubber cup) of an oil cylinder, an O-ring, a knocker, etc. Parseal, boots, etc.
• the sealing material used for the electrical equipment of the automobile engine is not particularly limited, and examples thereof include an O-ring and a packing of a car air conditioner.
• the obtained fluororubber is sheeted by passing it through a kneading roll machine (roll gap: approx. Lm m) 3 times equipped with two 8-inch rolls, and a mu-one viscosity meter (MV2000E ALPHA TEC)
• Vm Viscosity
• the crosslinkable composition shown in Table 1 is subjected to primary press vulcanization under standard vulcanization conditions to obtain a sheet having a thickness of 2 mm, and measured according to JIS K6251.
• Kneading method Roll kneading
• a sheet of lmm-thick uncrosslinked fluorine sheet and lmm-thick uncrosslinked non-fluorinated rubber sheet are overlapped and inserted into a heated mold and subjected to crosslinking by applying pressure at 170 ° C for 15 minutes.
• a layered product was obtained.
• the obtained laminate was cut into a strip of 25 mm width and 1 OO mm length to give a test piece, and a T peel test was performed at 23 ° C. at a peel rate of 50 mm Z to measure the adhesive strength.
• the peeling mode was observed and evaluated according to the following criteria.
• Additive A 1-dodecyl-2-methyl 3 benzylimidazolium chloride (Cuazol SFZ Shikoku Chemicals Co., Ltd.)
• Additive B l, 8 Diazobicyclo [5, 4, 0] undecene 7 and phenol
• MA- 150 Highly active acid magnesium (Kyowa Chemical Industry Co., Ltd.)
• CALDIC2000 Calcium hydroxide (Omi Chemical Industry Co., Ltd.)
• NBR Acrylonitrile monobutadiene rubber (manufactured by N530 JSR) Powerful rubber composition (60 parts by weight of carbon black, 5 parts by weight of zinc oxide, 1 part by weight of stearic acid, 100 parts by weight of rubber, anti-aging) 2 parts by weight of agent, 15 parts by weight of plasticizer, 3 parts by weight of peroxide)
• ECO Epic Chlorhydrin Rubber (Epichromer H manufactured by Daiso Co., Ltd.) Rubber composition (carbon black for 100 parts by weight of rubber) 60 parts by weight, plasticizer 10 parts, anti-aging agent 1 part, MgO 3 parts, vulcanizing agent 1 part, sulfur 0.3 parts, vulcanization delay Agent 0.5 parts by weight)
• Vulcanizability, Mooney scorch and normal physical properties of the resulting crosslinkable composition were evaluated.
• adhesion was evaluated using the obtained uncrosslinked rubber sheet and an uncrosslinked rubber sheet having NBR and ECO power.
• a crosslinked sheet was obtained in the same manner as in Example 1 except that the blending conditions shown in Table 1 were used.
• Vulcanizability, Mooney scorch and normal physical properties of the resulting crosslinkable composition were evaluated. Adhesion was evaluated using the obtained uncrosslinked rubber sheet and an uncrosslinked rubber sheet having NBR and ECO power.
• the crosslinkable composition of the present invention can improve adhesion with a non-fluorinated rubber layer formed from a non-fluorinated rubber composition by adding a specific additive.

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• 2005
  • 2005-02-04 JP JP2005029872A patent/JP5114826B2/ja not_active Expired - Fee Related
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