WO2022059575A1 - フッ素ゴム架橋用組成物および成形品 - Google Patents
フッ素ゴム架橋用組成物および成形品 Download PDFInfo
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- WO2022059575A1 WO2022059575A1 PCT/JP2021/032997 JP2021032997W WO2022059575A1 WO 2022059575 A1 WO2022059575 A1 WO 2022059575A1 JP 2021032997 W JP2021032997 W JP 2021032997W WO 2022059575 A1 WO2022059575 A1 WO 2022059575A1
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- 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
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/41—Compounds containing sulfur bound to oxygen
- C08K5/42—Sulfonic acids; Derivatives thereof
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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
- C08L15/00—Compositions of rubber derivatives
- C08L15/02—Rubber derivatives containing halogen
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
Definitions
- the present disclosure relates to a fluororubber cross-linking composition and a molded product.
- Patent Document 1 describes an aromatic polyhydroxy compound that can act as a cross-linking agent or an auxiliary curing agent for a fluorinated elastomer as an essential component in the final curable composition.
- One of the most useful aromatic polyphenols is the bisphenol compound, hexafluoroisopropylidene-bis (4-hydroxybenzene) known as bisphenol AF.
- Patent Document 2 describes a composition containing a fluorocarbon elastomer gum, a fluoroaliphatic sulfonamide as a curing agent thereof, and a second curing agent selected from the group consisting of polyhydroxy compounds, polyamine compounds, and derivatives thereof. Has been done.
- Patent Document 3 describes, in a composition containing a fluorocarbon elastomer gum and a vulcanizing agent thereof, one or a mixture of aromatic compounds having a hydroxy and oxyallyl groups in which the vulcanizing agent is directly bonded to an aromatic ring-carbon atom.
- the above-mentioned composition characterized by being a composition containing is described.
- Patent Document 4 comprises (a) a fluorine-containing elastomer, (b) a divalent metal oxide, a divalent metal hydroxide, and a mixture of these metal oxides or metal hydroxides and a metal salt of a weak acid.
- a composition for fluororubber scouring containing one or more of the substances selected from the group, (c) a polyhydroxy aromatic compound, and (d) a specific sulfide accelerator is described.
- a fluororubber cross-linking composition which is at least one selected from the group consisting of a metal, an alkaline earth metal or a salt with an onium compound.
- the fluororubber (a) contains a vinylidene fluoride unit.
- the content of the cross-linking agent (b) is preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the fluororubber (a).
- the fluororubber cross-linking composition of the present disclosure preferably further contains a cross-linking accelerator (c).
- the content of the cross-linking accelerator (c) is preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the fluororubber (a).
- the fluororubber cross-linking composition of the present disclosure preferably further contains an acid receiving agent (d).
- the content of the acid receiving agent (d) is preferably 0.1 to 50 parts by mass with respect to 100 parts by mass of the fluororubber (a).
- at least the acid receiving agent (d) is selected from the group consisting of metal oxides, metal hydroxides, alkali metal silicates, metal salts of weak acids and hydrotalcites. It is preferably one kind.
- the cross-linking agent (b) is alkaline with 2,7-dihydroxy-9H-fluoren-9-one and 2,7-dihydroxy-9H-fluoren-9-on. It is preferably at least one selected from the group consisting of metals, alkaline earth metals or salts with onium compounds.
- the fluororubber cross-linking composition of the present disclosure preferably further contains a dialkyl sulfone compound.
- a molded product obtained from the above-mentioned fluororubber cross-linking composition is provided.
- a fluororubber cross-linking composition which contains a compound containing no fluorine atom as a cross-linking agent and can obtain a molded product having excellent compression set characteristics at high temperature.
- the fluororubber cross-linking composition of the present disclosure contains a fluororubber (a) and a cross-linking agent (b) capable of cross-linking a polyol.
- the fluorororubber cross-linking composition of the present disclosure comprises a compound represented by the following general formula (b) as a cross-linking agent (b), and a salt of the compound and an alkali metal, an alkaline earth metal or an onium compound. Contains at least one selected from the group. Since these compounds do not contain a fluorine atom, they are easy to handle. Furthermore, it has been found that from the fluororubber cross-linking composition containing the cross-linking agent (b), a molded product exhibiting compression set characteristics at a high temperature can be obtained.
- fluororesin that can be crosslinked with a polyol used in the present disclosure is a fluororubber having a site that can be crosslinked with a polyol.
- fluororubber is an amorphous fluoropolymer. “Amorphous” means a melting peak ( ⁇ H) that appears in differential scanning calorimetry [DSC] (heating rate 20 ° C / min) or differential thermal analysis [DTA] (heating rate 20 ° C / min) of a fluoropolymer. ) Is 4.5 J / g or less.
- Fluororubber exhibits elastomeric properties by cross-linking. Elastomer properties mean properties that can stretch a polymer and retain its original length when the force required to stretch the polymer is no longer applied.
- Examples of the site that can be crosslinked with a polyol include a site having a vinylidene fluoride (VdF) unit.
- VdF vinylidene fluoride
- fluororubber containing VdF units is preferable because the effect of using the cross-linking agent (b) is likely to be exhibited.
- Examples of the fluororubber having a moiety capable of cross-linking a polyol include non-perfluorofluororubber and fluororubber containing -CH 2- (methylene group) in the main chain.
- the fluororubber having a moiety capable of cross-linking a polyol is, for example, vinylidene fluoride (VDF) -based fluoroepolymer described in JP-A-2003-277563, which has substantially no polar end group, or JP-A-2018-527449.
- VDF vinylidene fluoride
- It may be a vinylidene fluoride-based fluoroepolymer containing a repeating unit derived from vinylidene fluoride (VDF) described in 1 and a repeating unit derived from at least one additional (pel) fluorinated monomer.
- VDF vinylidene fluoride
- pel additional fluorinated monomer
- Examples of the fluororubber having a polyol crosslinkable moiety include VdF-based fluororubber and rubber having a polyol crosslinkable functional moiety in the side chain and / or the main chain.
- Examples of the VdF-based fluororubber include tetrafluoroethylene (TFE) / propylene / VdF-based fluororubber, ethylene / hexafluoropropylene (HFP) / VdF-based fluororubber, VdF / HFP-based fluororubber, and VdF / TFE / HFP-based fluororubber. And so on.
- TFE tetrafluoroethylene
- HFP ethylene / hexafluoropropylene
- VdF / HFP-based fluororubber VdF / HFP-based fluororubber
- VdF / TFE / HFP-based fluororubber Vd
- VdF-based fluororubber As the VdF-based fluororubber, the one represented by the following general formula (1) is preferable.
- the structural unit M 1 is a structural unit derived from vinylidene fluoride (m 1 )
- the structural unit M 2 is a structural unit derived from a fluoroethylene monomer (m 2 )
- the structural unit N 1 Is a repeating unit derived from the monomer (m 1 ) and the monomer (n 1 ) copolymerizable with the monomer (m 2 )
- VdF-based fluororubbers represented by the general formula (1) those containing 30 to 85 mol% of the structural unit M 1 and 55 to 15 mol% of the structural unit M 2 are preferable, and more preferably the structural unit M 1 is used. It is 50 to 80 mol% and the structural unit M 2 is 50 to 20 mol%.
- the structural unit N 1 is preferably 0 to 20 mol% with respect to the total amount of the structural unit M 1 and the structural unit M 2 .
- fluoroethylene-containing monomer (m 2 ) one kind or two or more kinds of monomers can be used, for example, TFE, chlorotrifluoroethylene (CTFE), trifluoroethylene, HFP, trifluoropropylene, tetra.
- TFE chlorotrifluoroethylene
- CFE chlorotrifluoroethylene
- HFP trifluoropropylene
- Fluoropropylene, pentafluoropropylene, trifluorobutene, tetrafluoroisobutene, perfluoro (alkyl vinyl ether) (PAVE), general formula (2): CF 2 CFO (Rf 1 O) q (Rf 2 O) r Rf 3 (2) (In the formula, Rf 1 and Rf 2 are independently linear or branched perfluoroalkylene groups having 1 to 6 carbon atoms, and Rf 3 is a linear or branched perfluoroalkyl group having 1 to 6 carbon atoms, q and.
- the monomer (n 1 ) may be any as long as it can be copolymerized with the monomer (m 1 ) and the monomer (m 2 ), and may be, for example, ethylene, propylene, alkyl vinyl ether, or crosslinked. Examples include monomers that give a moiety, bisolefin compounds, and the like. These can be used alone or in any combination.
- CY 1 2 CY 1 -Rf 5 CHR 1 X 1 (4)
- Y 1 is independently a hydrogen atom, a fluorine atom or -CH 3
- Rf 5 is a fluoroalkylene group, a perfluoroalkylene group, a fluoropolyoxyalkylene group or a perfluoropolyoxyalkylene group
- R 1 is.
- X 1 is an iodine or bromine-containing monomer represented by an iodine atom or a bromine atom
- CF 2 CFO (CF 2 CF (CF 3 ) O) m (CF 2 ) n -X 2 (5)
- m is an integer of 0 to 5
- n is an integer of 1 to 3
- X 2 is a cyano group, a carboxyl group, an alkoxycarbonyl group, a bromine atom, and an iodine atom).
- General formula (6): CH 2 CH (CF 2 ) p I (6) Examples thereof include monomers represented by (in the formula, p is an integer of 1 to 10), and perfluoro (for example, as described in JP-A-5-63482 and JP-A-7-316234).
- Examples thereof include a containing monomer, a carboxyl group-containing monomer, and an alkoxycarbonyl group-containing monomer. These can be used alone or in any combination. Further, as the bisolefin compound, the compound described in JP-A-8-12726 can be used.
- VdF-based fluorororubber VdF / HFP-based rubber, VdF / HFP / TFE-based rubber, VdF / TFE / PAVE-based fluororubber, VdF / CTFE-based rubber, VdF / CTFE / TFE-based rubber, and the like are preferable. can give.
- a rubber composed of a copolymerization unit composed of a cured site monomer represented by), a rubber having a double bond in the side chain and / or the main chain, and the like can be mentioned.
- the fluorororubber that can be cross-linked with a polyol is preferably a fluororubber composed of VdF and at least one other fluorine-containing monomer, and particularly VdF / HFP-based fluororubber and VdF / TFE / HFP-based fluorine. It is preferably at least one rubber selected from the group consisting of rubber and VdF / TFE / PAVE-based fluororubber, and preferably from the group consisting of VdF / HFP-based fluororubber and VdF / TFE / HFP-based fluororubber. More preferably, it is at least one selected rubber.
- the fluororubber has a Mooney viscosity (ML1 + 10 (100 ° C.)) at 100 ° C. of preferably 2 or more, more preferably 10 or more, further preferably 20 or more, and more preferably 30 or more. Especially preferable. Further, it is preferably 200 or less, more preferably 150 or less, further preferably 120 or less, and particularly preferably 100 or less. Mooney viscosity is measured according to ASTM D1646-15 and JIS K6300-1: 2013.
- the fluororubber preferably has a fluorine content of 50 to 75% by mass. It is more preferably 60 to 73% by mass, and even more preferably 63 to 72% by mass.
- the fluorine content is calculated from the composition ratio of the monomer units constituting the fluororubber.
- Fluororubber preferably has a glass transition temperature of ⁇ 50 to 0 ° C.
- a DSC curve is obtained by raising the temperature of 10 mg of the sample at 20 ° C./min using a differential scanning calorimeter, and the extension of the baseline before and after the quadratic transition of the DSC curve and the change of the DSC curve.
- the temperature indicating the intersection with the tangent line at the curved point can be obtained as the glass transition temperature.
- the fluororubber described above can be manufactured by a conventional method.
- the fluororubber cross-linking composition of the present disclosure contains a cross-linking agent.
- the cross-linking agent is at least one selected from the group consisting of a compound represented by the following general formula (b) and a salt of the compound and an alkali metal, an alkaline earth metal or an onium compound.
- the compound represented by the general formula (b) has a total of two -OH groups.
- the bonding position of each group is not particularly limited, and can be bonded to any of the four carbon atoms to which the substitutable hydrogen atom is bonded among the six carbon atoms constituting the six-membered ring.
- Examples of the compound represented by the general formula (b) include 2,6-dihydroxy-9H-fluorene-9-on, 3,6-dihydroxy-9H-fluorene-9-on, and 2,7-dihydroxy-9H.
- -Fluorene-9-one is preferable, and 2,7-dihydroxy-9H-fluorene-9-one is more preferable.
- the hydrogen atom bonded to the two benzene rings may or may not be substituted with a substituent other than the hydroxy group, the halogen atom and the group containing the halogen atom.
- the substituent is not particularly limited as long as it does not contain a halogen atom, and examples thereof include a cyano group, an alkyl group having 1 to 10 carbon atoms, and an alcoholic group having 1 to 10 carbon atoms.
- the substituent is a substituent containing no halogen atom such as a fluorine atom or a group containing a fluorine atom, and therefore, the compound represented by the general formula (b) does not contain a fluorine atom.
- the cross-linking agent is a salt of the compound represented by the general formula (b) and an alkali metal, a salt of a compound represented by the general formula (b) and an alkaline earth metal, or a compound represented by the general formula (b). It may be a salt with an onium compound. Among these salts, the salt of the compound represented by the general formula (b) and the onium compound is preferable.
- the salt of the compound and the onium compound is an onium salt composed of an anion moiety derived from the compound and a cation moiety derived from the onium compound.
- the salt of the compound shown in b) and the onium compound can be used alone or in combination.
- the salt of the compound represented by the general formula (b) and the onium compound may be prepared by using an alkaline substance such as sodium hydroxide or an organic solvent with respect to the compound represented by the general formula (b) in water or an organic solvent. It is obtained by reacting with metallic sodium and then further reacting with an onium compound such as benzyltriphenylphosphonium chloride to distill off water or an organic solvent. Further, on the way, if necessary, the solution of the reaction product may be filtered, or the reaction product may be washed with water, an organic solvent or the like to remove by-products such as sodium chloride.
- an alkaline substance such as sodium hydroxide or an organic solvent
- an organic solvent such as benzyltriphenylphosphonium chloride
- cross-linking agent at least one selected from the group consisting of the compound represented by the general formula (b) and the salt of the compound represented by the general formula (b) and the onium compound is preferable.
- alkali metal Na or K is preferable.
- alkaline earth metal Ca or Mg is preferable.
- onium salt examples include ammonium salt, phosphonium salt, sulfonium salt and the like.
- Examples of the onium compound constituting the onium salt include an ammonium compound, a phosphonium compound, and a sulfonium compound. In the present disclosure, the onium compound does not contain a fluorine atom.
- an ammonium compound and a phosphonium compound are preferable, a phosphonium compound is more preferable, a quaternary phosphonium compound is further preferable, and benzyltriphenylphosphonium is particularly preferable.
- the ammonium compound a quaternary ammonium compound is preferable, and 8-benzyl-1,8-diazabicyclo [5,4,0] -7-undecenium and benzyldimethyloctadecylammonium are more preferable.
- the cross-linking agent may be at least one selected from the group consisting of the compound represented by the general formula (b) and the compounds represented by the following general formulas (b2) to (b3).
- Y + represents the cation of the onium salt.
- Y + represents the cation of the onium salt.
- the compounds represented by the general formulas (b2) and (b3) are onium salts composed of an anion moiety and a cation moiety.
- Y + in the general formulas (b2) and (b3) represents a cation constituting an onium salt.
- Examples of the cation represented as Y + include a benzyltriphenylphosphonium cation, an 8-benzyl-1,8-diazabicyclo [5,4,0] -7-undecenium cation, a benzyldimethyloctadecylammonium cation and the like.
- the compounds represented by the general formulas (b2) to (b3) have a total of two ⁇ OH groups or —O— groups.
- the bonding position of each group is not particularly limited, and can be bonded to any of the four carbon atoms to which the substitutable hydrogen atom is bonded among the six carbon atoms constituting the six-membered ring.
- the cross-linking agent can be mixed with other compounds and used.
- examples of the mixture containing a cross-linking agent include a mixture of a cross-linking agent and a solid solution of a cross-linking accelerator, a mixture of a cross-linking agent and a compound capable of dissolving the cross-linking agent, and the like.
- a mixture of the cross-linking agent and the cross-linking accelerator a mixture of the compound represented by the general formula (b) and a quaternary phosphonium salt and a mixture of the compound represented by the general formula (b) and a quaternary ammonium salt are used.
- a mixture of the compound represented by the general formula (b) and a quaternary phosphonium salt is more preferable, and a mixture of 2,7-dihydroxy-9H-fluoren-9-one and a quaternary phosphonium salt is even more preferable.
- a mixture of 2,7-dihydroxy-9H-fluoren-9-one and benzyltriphenylphosphonium chloride is particularly preferred.
- cross-linking agent at least one selected from the group consisting of 2,7-dihydroxy-9H-fluorene-9-one represented by any of the following formulas and salts thereof can be preferably used. ..
- Y + is a benzyltriphenylphosphonium cation, 8-benzyl-1,8-diazabicyclo [5,4,0] -7-undecenium cation, benzyldimethyloctadecylammonium cation.
- Y + is a benzyltriphenylphosphonium cation, 8-benzyl-1,8-diazabicyclo [5,4,0] -7-undecenium cation, benzyldimethyloctadecylammonium cation.
- the content of the cross-linking agent since a more excellent molded product can be obtained due to the compression set characteristics at high temperature, it is preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the fluororubber that can be crosslinked with a polyol. It is more preferably 0.5 to 5 parts by mass, further preferably 1 to 4 parts by mass, and particularly preferably 1 to 3 parts by mass.
- the cross-linking agent is a salt of the compound represented by the general formula (b) and an alkali metal, an alkaline earth metal or an onium compound
- the content (part by mass) of the cross-linking agent is the cation portion of the cross-linking agent.
- the cross-linking agent is a compound represented by the general formula (b2) or the general formula (b3)
- the content (part by mass) of the cross-linking agent is the onium of the general formula (b2) or the general formula (b3).
- the fluororubber crosslinking composition of the present disclosure preferably contains a crosslinking accelerator.
- a cross-linking accelerator is used, the cross-linking reaction can be promoted by promoting the formation of an intramolecular double bond in the defluoric acid reaction of the fluororubber main chain.
- the cross-linking agent a compound represented by the general formula (b) and one compound selected from a salt of the compound represented by the general formula (b) and an alkali metal or an alkaline earth metal or an onium compound are used. In some cases, it is preferable to use a cross-linking accelerator together with the cross-linking agent.
- the cross-linking accelerator can be used together with the cross-linking agent, but it is not always necessary to use the cross-linking agent.
- the amount of the cross-linking accelerator can be appropriately adjusted depending on the cross-linking conditions and the physical properties of the molded product. Increasing the amount of the cross-linking accelerator makes the cross-linking reaction faster or allows cross-linking at a lower temperature, but the compression set tends to deteriorate. On the contrary, if the amount of the cross-linking accelerator is reduced, the cross-linking reaction is slowed down, but the compression set tends to be improved.
- an onium compound (however, excluding the salt of the compound represented by the general formula (b) and the onium compound) is generally used.
- the onium compound is not particularly limited, and examples thereof include ammonium salts such as quaternary ammonium salts, phosphonium salts such as quaternary phosphonium salts, and sulfonium salts. Among these, quaternary ammonium salts and quaternary quaternary salts. Phosphonium salts are preferred.
- the quaternary ammonium salt is not particularly limited, and is, for example, 8-methyl-1,8-diazabicyclo [5,4,0] -7-undecenium chloride, 8-methyl-1,8-diazabicyclo [5, 4,0] -7-undecenium iodide, 8-methyl-1,8-diazabicyclo [5,4,0] -7-undecenium hydroxyside, 8-methyl-1,8-diazabicyclo [5] , 4,0] -7-undecenium methylsulfate, 8-ethyl-1,8-diazabicyclo [5,4,0] -7-undecenium bromide, 8-propyl-1,8-diazabicyclo [5] , 4,0] -7-undecenium bromide, 8-dodecyl-1,8-diazabicyclo [5,4,0] -7-undecenium chloride, 8-dodecyl-1,8-
- the quaternary phosphonium salt is not particularly limited, and for example, tetrabutylphosphonium chloride, benzyltriphenylphosphonium chloride (hereinafter referred to as BTPPC), benzyltrimethylphosphonium chloride, benzyltributylphosphonium chloride, tributylallylphosphonium chloride, tributyl. Examples thereof include -2-methoxypropylphosphonium chloride and benzylphenyl (dimethylamino) phosphonium chloride. Among these, benzyltriphenylphosphonium chloride (BTPPC) is preferable from the viewpoint of crosslinkability and physical properties of the crosslinked product.
- BTPPC benzyltriphenylphosphonium chloride
- the content of the cross-linking accelerator since the cross-linking reaction has an appropriate rate and a more excellent molded product can be obtained due to the compression set characteristics at high temperature, 100 parts by mass of the fluoro rubber that can be cross-linked with the polyol can be obtained. It is preferably 0.1 to 10 parts by mass, more preferably 0.1 to 5 parts by mass, still more preferably 0.1 to 3 parts by mass, and particularly preferably 0.1 to 2 parts by mass.
- the cross-linking agent is a salt of the compound represented by the general formula (b) and the onium compound
- the content of the cross-linking accelerator is the cation portion of the cross-linking agent (that is, the cation derived from the onium compound). It is a value including.
- the content of the cross-linking accelerator is a value including the cation portion (Y + ) of the onium salt of (b2) or (b3).
- the fluororubber cross-linking composition of the present disclosure may further contain an acid receiving agent.
- an acid receiving agent By containing the acid receiving agent, the cross-linking reaction of the fluororubber cross-linking composition proceeds more smoothly, and the compression set characteristics at high temperatures are further improved.
- the acid receiving agent examples include metal oxides such as magnesium oxide, calcium oxide, bismuth oxide and zinc oxide, metal hydroxides such as calcium hydroxide, hydrotalcites, sodium metasilicate and the like.
- metal oxides such as magnesium oxide, calcium oxide, bismuth oxide and zinc oxide
- metal hydroxides such as calcium hydroxide, hydrotalcites, sodium metasilicate and the like.
- alkali metal silicates described in Japanese Patent Laid-Open No. 2003-277563 and metal salts of weak acids described in JP-A-2003-277563.
- the metal salt of the weak acid include carbonates of Ca, Sr, Ba, Na and K, benzoate, oxalate and phosphite.
- the acid receiving agent is selected from the group consisting of metal oxides, metal hydroxides, alkali metal silicates and hydrotalcites because it is possible to obtain even more excellent molded products due to the compression set characteristics at high temperatures. At least one is preferable. If the obtained molded product is required to have good water resistance, acid resistance, or organic acid ester resistance including biodiesel, the acid receiving agent may be a group consisting of bismuth oxide and hydrotalcite. At least one selected is preferred.
- the content of the acid-receiving agent is such that a more excellent molded product can be obtained due to the compression set characteristics at high temperature. It is preferably 0.1 to 100 parts by mass, more preferably 1 to 50 parts by mass, still more preferably 1 to 30 parts by mass, and particularly preferably 1 to 20 parts by mass.
- the content of the acid receiving agent When the content of the acid receiving agent is high, the water resistance, acid resistance and organic acid ester resistance including biodiesil of the obtained molded product tend to be lowered, while when the content of the acid receiving agent is low, the crosslinking rate tends to be low. The mechanical properties tend to decrease due to the decrease in crosslink density. Therefore, the content of the acid receiving agent can be selected according to the use of the obtained molded product.
- the content of calcium hydroxide is reduced to 0 to 1.5 parts by mass, and then the content of the other acid receiving agent is adjusted to obtain the cross-linking density. By adjusting the above, it is possible to obtain a molded product having better compression set characteristics at high temperature.
- the fluororubber cross-linking composition is a usual additive to be added to the fluororubber cross-linking composition, for example, a filler (carbon black, bituminous charcoal, barium sulfate, diatomaceous earth, fired clay, etc.). Talk, etc.), processing aids (wax, etc.), plasticizers, colorants, stabilizers, adhesives (Kumaron resin, Kumaron / Inden resin, etc.), mold release agents, conductivity-imparting agents, thermal conductivity-imparting agents , Surface non-adhesives, softening agents, heat resistance improving agents, flame retardants, foaming agents, antioxidants described in International Publication No. 2012/0234885, and other various additives can be blended. One or more commonly used cross-linking agents and cross-linking accelerators different from the above may be blended.
- the content of the filler such as carbon black is not particularly limited, but is preferably 0 to 300 parts by mass with respect to 100 parts by mass of the fluororubber that can be crosslinked with a polyol, and is preferably 1 to 150 parts by mass. It is more preferably 2 to 100 parts by mass, and particularly preferably 2 to 75 parts by mass.
- the content of the processing aid such as wax is preferably 0 to 10 parts by mass, and more preferably 0 to 5 parts by mass with respect to 100 parts by mass of the fluororubber that can be crosslinked with a polyol.
- the use of processing aids, plasticizers and mold release agents tends to reduce the mechanical and sealing properties of the obtained molded product, so the content of these is within the allowable range of the characteristics of the desired molded product. Need to be adjusted.
- the fluororubber cross-linking composition may contain a dialkyl sulfone compound.
- the dialkyl sulfone compound By containing the dialkyl sulfone compound, the cross-linking efficiency of the fluororubber cross-linking composition is increased, the cross-linking speed is increased, and the compression set is further improved.
- the dialkyl sulfone compound include dimethyl sulfone, diethyl sulfone, dibutyl sulfone, methyl ethyl sulfone, diphenyl sulfone, sulfolane and the like. Of these, sulfolane is preferable because of its appropriate cross-linking efficiency, compression set, and boiling point.
- the content of the dialkyl sulfone compound is preferably 0 to 10 parts by mass, more preferably 0 to 5 parts by mass, and 0 to 3 parts by mass with respect to 100 parts by mass of the fluororubber that can be crosslinked with a polyol. It is particularly preferable to have.
- the fluororubber cross-linking composition of the present disclosure contains a dialkyl sulfone compound
- the lower limit of the content of the dialkyl sulfone compound is, for example, 0.1 mass by mass with respect to 100 parts by mass of the fluororubber that can be crosslinked with a polyol. It may be more than one part.
- the fluororubber cross-linking composition is a rubber mixture in which fluororubber (a), cross-linking agent (b), cross-linking accelerator (c), acid-receiving agent (d), other components (e) and the like are generally used. It is obtained by kneading using a kneading device.
- a kneading device As the rubber kneading device, a roll, a kneader, a Banbury mixer, an internal mixer, a twin-screw extruder, or the like can be used.
- the fluororubber (a), the cross-linking agent (b) and the cross-linking accelerator (c) are mixed at 100 to 200 ° C. using a closed kneading device such as a kneader. After kneading while melting at a high temperature of the above, a method of kneading the acid receiving agent (d), other components (e) and the like at a relatively low temperature lower than this may be used.
- the mixture is left at room temperature for 12 hours or more.
- the dispersibility can be further improved.
- the molded product of the present disclosure can be obtained. Further, the molded product of the present disclosure can also be obtained by molding and cross-linking the fluororubber cross-linking composition.
- the fluororubber cross-linking composition can be molded by a conventionally known method. The molding and crosslinking methods and conditions may be within the range of known methods and conditions for the molding and crosslinking to be adopted. The order of molding and cross-linking is not limited, and may be molded and then crosslinked, may be crosslinked and then molded, or may be molded and crosslinked at the same time.
- the molding method examples include, but are not limited to, a compression molding method, an injection molding method, an injection molding method, an extrusion molding method, and a molding method by Rohto cure.
- a steam cross-linking method, a cross-linking method by heating, a radiation cross-linking method and the like can be adopted, and among them, a steam cross-linking method and a cross-linking method by heating are preferable.
- Specific cross-linking conditions which are not limited, are usually in a temperature range of 140 to 250 ° C. and within a cross-linking time of 1 minute to 24 hours, the cross-linking agent (b), the cross-linking accelerator (c) and the acid-receiving agent (d). It may be decided appropriately according to the type such as.
- cross-linking conditions which are not limited, are usually in a temperature range of 140 to 300 ° C. and a range of 30 minutes to 72 hours, such as a cross-linking agent (b), a cross-linking accelerator (c) and an acid receiving agent (d). It may be decided appropriately according to the type.
- the molded product of the present disclosure is excellent in various properties such as heat resistance, oil resistance, chemical resistance, and flexibility, and is also excellent in compression permanent strain characteristics at high temperatures. Therefore, the molded product of the present disclosure is generally used for parts for the purpose of sliding in contact with other materials, sealing and sealing other materials and substances, vibration isolation, and soundproofing, and is used in the automobile industry and the aircraft industry. , Can be used as various parts in various fields such as the semiconductor industry.
- the fields used include, for example, semiconductor-related fields, automobile fields, aircraft fields, space / rocket fields, marine fields, chemicals fields such as chemical plants, chemical fields such as pharmaceuticals, photographic fields such as developers, printing machines, etc.
- Printing field, painting field such as painting equipment, analysis equipment, analysis / physics and chemistry machinery field such as instruments, food equipment field including food plant equipment and household goods, beverage food manufacturing equipment field, pharmaceutical manufacturing equipment field, medical parts field, Chemical transportation equipment field, nuclear plant equipment field, steel field such as iron plate processing equipment, general industrial field, electrical field, fuel cell field, electronic parts field, optical equipment parts field, space equipment parts field, petrochemical plant equipment Fields, energy resource exploration and mining equipment parts field such as oil and gas, oil refining field, oil transportation equipment parts field, etc. can be mentioned.
- Examples of the usage form of the molded product include rings, packings, gaskets, diaphragms, oil seals, bearing seals, lip seals, plunger seals, door seals, lips and face seals, gas delivery plate seals, wafer support seals, barrel seals, etc.
- Examples include various sealing materials and packings. As the sealing material, it can be used in applications that require heat resistance, solvent resistance, chemical resistance, and non-adhesiveness.
- tubes hoses, rolls, various rubber rolls, flexible joints, rubber plates, coatings, belts, dampers, valves, valve seats, valve bodies of valves, chemical resistant coating materials, laminating materials, lining materials, etc. can.
- the cross-sectional shape of the ring, packing, and seal may be various shapes, specifically, for example, a square, an O-shape, a ferrule, or the like, or a D-shape or an L-shape. , T-shaped, V-shaped, X-shaped, Y-shaped, or the like.
- semiconductor manufacturing equipment liquid crystal panel manufacturing equipment, plasma panel manufacturing equipment, plasma display panel manufacturing equipment, plasmaaddress liquid crystal panel manufacturing equipment, organic EL panel manufacturing equipment, field emission display panel manufacturing equipment, solar It can be used for battery substrate manufacturing equipment, semiconductor transfer equipment, and the like.
- an apparatus include a CVD apparatus, a gas control apparatus such as a gas control apparatus for semiconductors, a dry etching apparatus, a wet etching apparatus, a plasma etching apparatus, a reactive ion etching apparatus, a reactive ion beam etching apparatus, and a spatter etching apparatus.
- Specific usage patterns in the semiconductor-related field include, for example, various sealing materials such as gate valves, quartz windows, chambers, chamber lits, gates, bell jars, couplings, pump O-rings and gaskets; resist developer and peeling.
- Various sealing materials such as O-rings for liquids, hoses and tubes; resist developer tanks, stripping liquid tanks, wafer cleaning liquid tanks, wet etching tank linings and coatings; pump diaphragms; wafer transfer rolls; wafer cleaning liquids Hose tube; Sealing material for clean equipment such as sealant for clean equipment such as clean room; Sealing material for storage for storing devices such as semiconductor manufacturing equipment and wafers; Diaphragm for transferring chemicals used in the process of manufacturing semiconductors, etc. Can be mentioned.
- the engine body main motion system, valve drive system, lubrication / cooling system, fuel system, intake / exhaust system, drive system transmission system, chassis steering system, brake system, basic electrical components, control It can be used for electrical components such as system electrical components and equipment electrical components.
- the automobile field also includes motorcycles.
- molded products can be used for various sealing materials that are required to have heat resistance, oil resistance, fuel oil resistance, antifreeze liquid resistance for engine cooling, and steam resistance.
- the sealing material include seals such as gaskets, shaft seals and valve stem seals, and non-contact or contact type packings such as self-seal packings, piston rings, split ring type packings, mechanical seals and oil seals.
- seals such as gaskets, shaft seals and valve stem seals
- non-contact or contact type packings such as self-seal packings, piston rings, split ring type packings, mechanical seals and oil seals.
- diaphragms, hoses and tubes, electric wires, cushioning materials, anti-vibration materials, and various sealing materials used in belt AT devices can be mentioned.
- Specific usage patterns in the above fuel system include fuel injector, cold start injector, fuel line quick connector, sender flange quick connector, fuel pump, fuel tank quick connector, gasoline mixing pump, gasoline pump, fuel.
- O-ring used for tube body, fuel tube connector, injector, etc .
- exhalation system manifold fuel filter, pressure control valve, canister, fuel tank cap, fuel pump, fuel tank, fuel tank sender unit, fuel Seals used for injection devices, fuel high pressure pumps, fuel line connector systems, pump timing control valves, suction control valves, solenoid subasseshes, fuel cut valves, etc .
- Specific usage patterns in the above brake system include diaphragms used for master bags, hydraulic brake hoses, air brakes, brake chambers for air brakes, etc .; brake hoses, brake oil hoses, hoses used for vacuum brake hoses, etc.; oil seals. , O-rings, packings, various sealing materials such as brake piston seals; atmospheric valves and vacuum valves for master bags, check valves for brake valves; piston cups (rubber cups) for master cylinders, brake cups; hydraulic brakes Master cylinders and vacuum boosters, boots for wheel cylinders of hydraulic brakes, O-rings and glomets for anti-lock brake systems (ABS).
- ABS anti-lock brake systems
- Specific usage patterns for the above basic electrical components include insulators and sheaths for electric wires (harnesses), tubes for harness exterior parts, grommets for connectors, and the like.
- Specific usage patterns for control system electrical components include coating materials for various sensor wires.
- Specific usage patterns for the above-mentioned equipment electrical components include O-rings for car air conditioners, packings, cooler hoses, high-pressure air conditioner hoses, air conditioner hoses, gaskets for electronic throttle units, plug boots for direct ignition, and diaphragms for distributors. Can be mentioned. It can also be used for bonding electrical components.
- Specific usage patterns in the intake / exhaust system include packing used for the intake manifold, exhaust manifold, etc., throttle body packing of the throttle; EGR (exhaust recirculation), pressing control (BPT), waist gate, turbo waist. Diaphragm used for gates, actuators, variable turbine geometry (VTG) turbo actuators, exhaust purification valves, etc .; EGR (exhaust recirculation) control hose, emission control hose, turbocharger turbo oil hose (supply), turbo Oil hose (return), turbo air hose, intercooler hose, turbocharger hose, hose connected to the compressor of a turbo engine equipped with an intercooler, exhaust gas hose, air intake hose, turbo hose, DPF (diesel fine particle collection filter) sensor hose Hoses such as; air ducts and turbo air ducts; intake manifold gaskets; EGR sealants, afterburn prevention valve seats for AB valves, turbine shaft seals (such as turbochargers), rocker covers and air suction used in automobile
- seals used for steam recovery canisters, catalytic conversion devices, exhaust gas sensors, oxygen sensors, etc., and seals for solenoid armatures for steam recovery and steam canisters; used as intake system manifold gaskets, etc. Can be done.
- O-ring seal for a direct injection injector, a rotary pump seal, a control diaphragm, a fuel hose, an EGR, a priming pump, a diaphragm of a boost compensator, etc. in parts related to a diesel engine. It can also be used for O-rings, sealing materials, hoses, tubes, diaphragms, gasket materials, pipes used in urea SCR systems, urea water tank bodies of urea SCR systems, and sealing materials for urea water tanks. ..
- transmission-related bearing seals examples include transmission-related bearing seals, oil seals, O-rings, packings, torque converter hoses, and the like.
- examples include mission oil seals, AT mission oil hoses, ATF hoses, O-rings, and packings.
- the transmission includes AT (automatic transmission), MT (manual transmission), CVT (continuously variable transmission), DCT (dual clutch transmission), etc.
- Specific usage patterns in the steering system include power steering oil hoses and high-voltage power steering hoses.
- Examples of the form used in the engine body of an automobile engine include a cylinder head gasket, a cylinder head cover gasket, an oil pan packing, a gasket such as a general gasket, an O-ring, a packing, a seal such as a timing belt cover gasket, and a control hose.
- Examples include hoses, vibration-proof rubber for engine mounts, control valve diaphragms, and cam shaft oil seals.
- shaft seals such as crankshaft seals and camshaft seals.
- valve train of an automobile engine it can be used for valve stem oil seals of engine valves, valve seats of butterfly valves, etc.
- radiator hose In the lubrication / cooling system of automobile engines, engine oil cooler hose, oil return hose, seal gasket, water hose around radiator, radiator seal, radiator gasket, radiator O-ring, vacuum pump In addition to vacuum pump oil hoses, it can be used for radiator hoses, radiator tanks, oil pressure diaphragms, fan coupling seals, and the like.
- various seal parts for aircraft for example, various seal parts for aircraft, various parts for aircraft for engine oil for aircraft, jet engine valve stem seals, gaskets and O-rings, rotating shaft seals, gaskets for hydraulic equipment, fire barrier seals, for example. It can be used as a fuel supply hose, gasket, O-ring, aircraft cable, oil seal, shaft seal, and the like.
- screw propeller shaft stern seals In the ship field, for example, screw propeller shaft stern seals, intake / exhaust valve stem seals for diesel engines, butterfly valve valve seals, butterfly valve valve seats and shaft seals, butterfly valve shaft seals, and stern pipe seals. It can be used as a fuel hose, a gasket, an O-ring for an engine, a cable for a ship, an oil seal for a ship, a shaft seal for a ship, and the like.
- Specific usage patterns in the chemicals and chemicals fields include chemical equipment, chemical pumps and flow meters, chemical pipes, heat exchangers, pesticide spreaders, pesticide transfer pumps, gas pipes, fuel cells, and the like.
- Seals used for analytical equipment and physics and chemistry equipment for example, column fittings for analytical equipment and instruments), shrinkage joints for flue gas desulfurization equipment, nitrate plants, power plant turbines, etc., and seals used for medical sterilization processes.
- Seals for plating solutions roller seals for papermaking belts, joint seals for wind tunnels; O-rings used in chemical equipment such as reactors and stirrers, analytical instruments and instruments, chemical pumps, pump housings, valves, rotary meters, etc.
- O-rings for mechanical seals, O-rings for compressor sealing; packings used for high-temperature vacuum dryers, tube joints for gas chromatography and pH meters, and glass cooler packings for sulfuric acid production equipment; diaphragm pumps, analysis Diaphragm used for equipment and physics and chemistry equipment; Gasket used for analysis equipment and instruments; Fitting wheel (ferrule) used for analysis equipment and instruments; Valve seat; U cup; Used for chemical equipment, gasoline tank, wind tunnel, etc.
- Lining and corrosion resistant lining of alumite processing tank Coating of masking jig for plating; Valve parts of analytical equipment and physics and chemistry equipment; Expansion joint of flue gas desulfurization plant; Acid resistant hose for concentrated sulfuric acid, chlorine gas transfer hose, oil resistant Rainwater drain hose for hoses, benzene and toluene storage tanks; chemical resistant tubes and medical tubes used for analytical equipment and physics and chemistry equipment; triclen resistant rolls and dyeing rolls for fiber dyeing; pharmaceutical plugs; medical use Rubber stoppers; chemical bottles, chemical tanks, bags, chemical containers; protective equipment such as strong acid and solvent resistant gloves and boots.
- the field of photography such as the above-mentioned developing machine
- the field of printing such as printing machines
- the field of painting such as painting equipment
- it can be used as rolls, belts, seals, valve parts, etc. of dry copiers.
- Specific usage patterns in the photographic field, printing field, and painting field include the surface layer of a transfer roll of a copier, a cleaning blade of a copier, a belt of a copier; for OA equipment such as a copier, a printer, and a facsimile.
- Rolls eg, fixing rolls, crimping rolls, pressure rolls, etc.
- belts PPC copier rolls, roll blades, belts
- film developing machines X-ray film developing machine rolls
- printing machine printing rolls printing rolls.
- Specific usage patterns in the above food equipment field include plate type heat exchanger seals, vending machine electromagnetic valve seals, jar pot packing, sanitary pipe packing, pressure pot packing, water heater seals, and heat exchange.
- Dexterity gaskets, diaphragms and packings for food processing equipment, rubber materials for food processing machines for example, various seals such as heat exchanger gaskets, diaphragms, O-rings, piping, hoses, sanitary packing, valve packing, when filling Filling packing used as a joint between the mouth of a bottle or the like and the filler) and the like.
- products such as alcoholic beverages and soft drinks, filling devices, food sterilizers, brewing devices, water heaters, packings, gaskets, tubes, diaphragms, hoses, joint sleeves and the like used in various automatic food vending machines are also mentioned.
- nuclear plant equipment field it can be used for check valves and pressure reducing valves around nuclear reactors, seals for uranium hexafluoride enrichers, and the like.
- Specific usage patterns in the general industrial field include sealing materials for hydraulic equipment such as machine tools, construction machines, and hydraulic machines; seals and bearing seals for hydraulic and lubricating machines; sealing materials used for mandrel, etc.; dry cleaning equipment. Seals used for windows, etc .; cyclotron seals, (vacuum) valve seals, proton accelerator seals, automatic packaging machine seals, air sulfite gas and chlorine gas analyzer (pollution measuring instrument) pump diaphragms, snakes.
- It can also be used as a sex-improving additive, a fuel container for a small generator or a lawn mower, a pre-coated metal obtained by applying a primer treatment to a metal plate, or the like.
- a fuel container for a small generator or a lawn mower a pre-coated metal obtained by applying a primer treatment to a metal plate, or the like.
- it can be used as a sheet and a belt by impregnating it with a woven fabric and baking it.
- Specific usage patterns in the steel field include iron plate processing rolls for iron plate processing equipment.
- Specific usage patterns in the electrical field include insulating oil caps for Shinkansen, benching seals for liquid-sealed transformers, transformer seals, oil well cable jackets, oven seals for electric furnaces, and microwave window frames. Used for sealing, sealing material used to bond the wedge and neck of CRT, sealing material for halogen lamps, fixing agent for electrical parts, sealing material for end treatment of sheathed heaters, and insulation and moisture-proof treatment for lead wire terminals of electrical equipment. Examples include sealing materials that are used.
- oil-resistant / heat-resistant electric wires high-heat-resistant electric wires, chemical-resistant electric wires, high-insulation electric wires, high-voltage power transmission lines, cables, electric wires used in geothermal power generation equipment, and electric wires used around automobile engines. You can also. It can also be used for oil seals and shaft seals for vehicle cables.
- electrical insulating materials for example, insulating spacers for various electrical devices, insulating tapes used for cable joints and ends, materials used for heat-shrinkable tubes, etc.
- electricity used in high-temperature atmospheres and It can also be used as an electronic device material (for example, a wire lead material for a motor, an electric wire material around a high heat furnace). It can also be used as a sealing layer for solar cells and a protective film (back sheet).
- sealing materials between electrodes, between electrodes and separators, seals, packings, and separators for pipes such as hydrogen, oxygen, and generated water can be used as such.
- the electronic component field it can be used as a heat radiating material raw material, an electromagnetic wave shielding material raw material, a gasket for a computer hard disk drive (magnetic recording device), and the like.
- buffer rubber (crash stopper) for hard disk drive binder for electrode active material of nickel hydrogen secondary battery, binder for active material for lithium ion battery, polymer electrolyte for lithium secondary battery, binder for positive electrode of alkaline storage battery, Binders for EL elements (electroluminescence elements), binders for electrode active materials for capacitors, encapsulants, sealants, quartz coatings for optical fibers, films and sheets such as optical fiber coatings, CMOS electronic circuits, transistors, integration Electronic components such as circuits, organic transistors, light emitting elements, actuators, memories, sensors, coils, capacitors, resistors, potting and coating of circuit boards, adhesive seals, fixing agents for electronic components, modifiers for encapsulants such as epoxy, Printed substrate coating agent, printed wiring board
- Specific usage patterns in the field of energy resource search and mining equipment parts include drill bit seals, pressure adjustment diaphragms, horizontal excavation motor (stator) seals, stator bearing (shaft) seals, and blowout prevention devices (BOP).
- Sealing material used sealing material used for rotary blowout prevention device (pipe wiper), sealing material used for MWD (real-time excavation information detection system), gas-liquid connector, layer inspection used for layer inspection device (logging equipment)
- Tool seals eg, O-rings, seals, packings, gas-liquid connectors, boots, etc.
- a metal such as aluminum
- usage patterns include door seals, gate valves, pendulum valves, solenoid tips, and metal rubber parts bonded to metal such as piston seals, diaphragms, and metal gaskets bonded to metal.
- molded products can be applied to belts.
- Power transmission belts including flat belts, V-belts, V-ribbed belts, toothed belts, etc.
- transport belts conveyor belts
- various high-temperature parts such as around engines of agricultural machinery, machine tools, industrial machinery, etc.
- Conveyor belt for transporting loose objects and granules such as coal, crushed stone, earth and sand, ore, wood chips in high temperature environment; Conveyor belt used in steel mills such as blast furnaces; Precision Conveyor belts for applications exposed to high temperature environments in equipment assembly factories, food factories, etc .; V-belts for agricultural machinery, general equipment (for example, OA equipment, printing machines, commercial dryers, etc.), automobiles, etc. V-ribbed belts; transmission belts for transport robots; toothed belts for transmission belts for food machinery, machine tools, etc .; toothed belts used in automobiles, OA equipment, medical equipment, printing machines, etc.
- timing belts are typical as toothed belts for automobiles.
- the belt may have a single-layer structure or a multi-layer structure.
- the belt may be composed of a layer obtained by cross-linking a fluororubber cross-linking composition and a layer made of another material.
- examples of the layer made of other materials include a layer made of other rubber, a layer made of thermoplastic resin, various fiber reinforcing layers, canvas, a metal leaf layer, and the like.
- Molded products can also be used for industrial anti-vibration pads, anti-vibration mats, railroad slab mats, pads, automobile anti-vibration rubber, etc.
- anti-vibration rubber for automobiles include anti-vibration rubber for engine mount, motor mount, member mount, strut mount, bush, damper, muffler hanger, center bearing and the like.
- joint members such as flexible joints and expansion joints, boots, grommets, and the like.
- boots In the field of ships, for example, marine pumps and the like can be mentioned.
- a joint member is a joint used for piping and piping equipment, and is used to prevent vibration and noise generated from the piping system, temperature changes, absorption of expansion and contraction and displacement due to pressure changes, absorption of dimensional fluctuations, earthquakes, and land subsidence. It is used for purposes such as mitigation and prevention of the effects of earthquakes.
- Flexible joints and expansion joints are preferably used, for example, as complex shape shaped bodies for shipbuilding piping, mechanical piping such as pumps and compressors, chemical plant piping, electrical piping, civil engineering / water piping, and automobiles.
- Boots include, for example, constant velocity joint boots, dust covers, rack and pinion steering boots, pin boots, piston boots and other automobile boots, agricultural machinery boots, industrial vehicle boots, construction machinery boots, hydraulic machinery boots, empty.
- It can be preferably used as a complex shape molded body such as boots for pressure machinery, boots for centralized lubricators, boots for liquid transfer, boots for firefighting, boots for various liquefied gas transfer, and various industrial boots.
- Molded products can also be used for filter press diaphragms, blower diaphragms, water supply diaphragms, liquid storage tank diaphragms, pressure switch diaphragms, accumulator diaphragms, air spring diaphragms such as suspensions, etc.
- an anti-slip agent that obtains a non-slip molded product or coating film in an environment wet with water such as rain, snow, ice or sweat can be obtained.
- the molded product may also be used as a cushioning material for hot press molding when manufacturing a decorative plywood made of melamine resin, phenol resin, epoxy resin, etc., a printed circuit board, an electrically insulating board, a rigid polyvinyl chloride laminated board, etc. Can be done.
- Molds can also contribute to the impermeability of various supports such as weapon-related sealing gaskets and protective clothing against contact with invasive chemicals.
- Lubricating oils engine oil, mission oil, gear oil, etc.
- amine-based additives especially amine-based additives used as antioxidants and cleaning dispersants
- O corner
- amine-based additives especially amine-based additives used as antioxidants and cleaning dispersants
- O corner
- V-ring V-ring
- X-ring packing
- gasket diaphragm
- oil seal bearing seal
- lip seal used to seal and seal fuel oil and grease (especially urea-based grease).
- Plunger seals, door seals, lips and face seals, gas delivery plate seals, wafer support seals, barrel seals and other various sealing materials and can be used for tubes, hoses, various rubber rolls, coatings, belts, valve bodies of valves. It can also be used as such. It can also be used as such. It can also be used as a laminating material and a lining material.
- a vulcanized film is formed on the molded product for use.
- non-adhesive oil-resistant rolls for copying machines weather strips for weather-resistant anti-icing, rubber stoppers for infusions, vial rubber stoppers, mold release agents, non-adhesive light transport belts, anti-adhesive coatings for play gaskets for automobile engine mounts, etc.
- Applications such as synthetic fiber coating processing, bolt members or joints having a packing coating thin layer, and the like can be mentioned.
- examples of the fuel related to automobiles include light oil, gasoline, fuel for diesel engines (including biodiesel fuel), and the like.
- Molded products can also be used as seal members for rolling bearings.
- rolling bearings examples include ball bearings, roller bearings, bearing units, linear bearings and the like.
- ball bearings examples include radial ball bearings, thrust ball bearings, and thrust angular contact ball bearings.
- Examples of the radial ball bearings include deep groove ball bearings, angular contact ball bearings, 4-point contact ball bearings, and self-aligning ball bearings.
- the deep groove ball bearing is used in, for example, electric motors, household electric appliances, OA equipment, and the like.
- angular contact ball bearings examples include single-row angular contact ball bearings, combined angular contact ball bearings, and double-row angular contact ball bearings.
- it is used for hydraulic pumps, vertical pumps, etc. to which an axial load is applied.
- Combined angular contact ball bearings are used for spindles of machine tools, grinding spindles, etc., which are required to improve the rotation accuracy and rigidity of the shaft.
- Double-row angular contact ball bearings are used in electromagnetic clutches for automobile air conditioners and the like.
- the above-mentioned four-point contact ball bearing is used for a speed reducer or the like in which an axial load is applied from both directions and a large space for the bearing width cannot be obtained.
- the self-aligning ball bearing is used in places where it is difficult to align the shaft and housing, or in transmission shafts where the shaft is easily bent.
- thrust ball bearings include single-type thrust ball bearings and double-type thrust ball bearings, and can be applied to conventionally known applications in which these ball bearings are used.
- the thrust angular contact ball bearing is used in combination with a double row cylindrical roller bearing as an axial load bearing for the spindle of a machine tool.
- roller bearings examples include radial roller bearings and thrust roller bearings.
- radial roller bearings examples include cylindrical roller bearings, needle roller bearings, tapered roller bearings, and self-aligning roller bearings.
- the above cylindrical roller bearings are used in general machines, machine tools, motors, reduction gears, railway axles, aircraft, etc.
- Needle roller bearings are used in general machines, automobiles, motors, etc.
- Tapered roller bearings are used in machine tools, automobile and railroad axles, rolling mills, reduction gears, etc.
- Self-aligning roller bearings are used in general machines, rolling mills, paper making machines, axles, etc.
- Examples of the thrust roller bearing include a thrust cylindrical roller bearing, a thrust needle roller bearing, a thrust tapered roller bearing, and a thrust self-aligning roller bearing.
- Thrust cylindrical roller bearings are used in machine tools, general machines, etc.
- Thrust needle roller bearings are used in automobiles, pumps, general machinery, etc.
- Thrust tapered roller bearings are used in general machines, rolling mills, etc.
- Thrust self-aligning roller bearings are used in cranes, extruders, general machines, etc.
- the fluorororubber cross-linking composition can be used as various parts in various industrial fields in addition to being cross-linked and used as a molded product. Therefore, next, the use of the fluororubber cross-linking composition will be described.
- Fluorororubber cross-linking compositions are surface modifiers such as metal, rubber, plastic, and glass; sealants and coatings that require heat resistance, chemical resistance, oil resistance, and non-adhesiveness, such as metal gaskets and oil seals.
- sealants and coatings that require heat resistance, chemical resistance, oil resistance, and non-adhesiveness, such as metal gaskets and oil seals.
- Non-adhesive coating materials such as rolls for OA equipment and belts for OA equipment, or bleed barriers; can be used for impregnation of woven fabric sheets and belts, coating by baking, and the like.
- the fluorororubber cross-linking composition can be used as a sealing material, lining, or sealant having a complicated shape by using a high viscosity and a high concentration, and by reducing the viscosity, a thin film film of several microns can be used. It can be used for the formation of pre-coated metal, O-ring, diaphragm, and reed valve by making it medium viscosity.
- Metals such as iron, stainless steel, copper, aluminum and brass; glass products such as glass plates, woven fabrics of glass fibers and non-woven fabrics; polypropylene and polyoxymethylene as article base materials to be coated with the fluororubber cross-linking composition.
- Molds and coatings of general-purpose and heat-resistant resins such as polyimide, polyamide-imide, polysulfone, polyethersulfone, polyetheretherketone; general-purpose rubbers such as SBR, butyl rubber, NBR, EPDM, and silicone rubbers, fluororubbers, etc. Heat resistant rubber moldings and coatings; natural and synthetic fiber woven and non-woven fabrics; and the like can be used.
- the coating formed from the fluororubber cross-linking composition can be used in fields where heat resistance, solvent resistance, lubricity, and non-adhesiveness are required, and specific applications include copiers, printers, and facsimiles.
- Rolls for OA equipment eg, anchoring rolls, crimping rolls
- transport belts e.g., guides belts; seats and belts; O-rings, diaphragms, chemical resistant tubes, fuel hoses, valve seals, chemical plant gaskets, engine gaskets, etc. Be done.
- the fluororubber cross-linking composition can also be dissolved in a solvent and used as a paint or an adhesive. It can also be used as a paint as an emulsion dispersion (latex).
- the fluororubber cross-linking composition is a structure composed of inorganic and organic base materials such as sealing materials and linings for various devices and pipes, metals, ceramics, glass, stones, concrete, plastics, rubber, wood, paper and fibers. Used as a surface treatment agent, etc.
- the fluororubber cross-linking composition can be applied to a base material or the like by a dispenser method coating or screen printing coating.
- the fluororubber cross-linking composition may be used as a coating composition for casting a film or for immersing a substrate such as a fabric, plastic, metal, or elastomer.
- the fluororubber bridging composition in the form of a latex, is a coated fabric, a protective glove, an impregnated fiber, an O-ring coating, a fuel-based quick connection O-ring coating, a fuel-based sealing coating, and a fuel tank rollover valve.
- coatings for diaphragms coatings for fuel tank pressure sensor diaphragms, coatings for oil filters and fuel filter seals, coatings for fuel tank sender seals and sender head fitting seals, coatings for copying machine fixing mechanism rolls, and polymer paint compositions. May be used for.
- the fluororubber cross-linking composition may be applied to an exposed cross section of a multi-layer component structure, for example in a hose structure and a method of manufacturing a diaphragm.
- Sealing members at connections and joints often consist of rigid materials, and fluororubber cross-linking compositions have improved frictional interfaces, increased dimensional tightening with reduced trace leaks along the sealing surface. Provide a fit.
- the latex enhances seal durability in a variety of automotive system applications.
- fluororubber cross-linking compositions can be used in the manufacture of power steering systems, fuel systems, air conditioning systems, as well as any joints where hoses and tubes are connected to different parts. Further usefulness of fluororubber cross-linking compositions is in the repair of manufacturing defects (and damage due to use) in multi-layer rubber structures such as three-layer fuel hoses.
- the fluororubber cross-linking composition is also useful for the application of thin steel sheets that can be formed or embossed before or after the coating is applied. For example, multiple layers of coated steel can be assembled to form a gasket between two rigid metal members. The sealing effect is obtained by applying a fluororubber cross-linking composition between the layers. This process reduces the bolt force and strain of the assembled parts, while providing good fuel savings and low emissions with low cracks, deflections, and hole strains, engine head gaskets and exhaust manifold gaskets. Can be used to manufacture.
- the fluororubber cross-linking composition is a coating agent; a gasket having an integrated base material formed by dispenser molding on a base material containing an inorganic material such as metal or ceramic, and packings; a base material containing an inorganic material such as metal or ceramic. It can also be used as a multi-layer product coated with.
- the fluororubber cross-linking composition is also suitable as a wiring material for light and bendable electronic devices, and can be used for known electronic components.
- Examples thereof include electronic components such as CMOS electronic circuits, transistors, integrated circuits, organic transistors, light emitting elements, actuators, memories, sensors, coils, capacitors, and resistors.
- ⁇ Glass transition temperature (Tg)> Using a differential scanning calorimeter (Mettler Toledo, DSC822e, or Hitachi High-Tech Science, X-DSC7000), heat the sample 10 mg at 20 ° C./min to obtain a DSC curve, and obtain a DSC curve. The temperature indicating the intersection of the extension of the baseline before and after the secondary transition and the tangent at the turning point of the DSC curve was defined as the glass transition temperature.
- ⁇ M100, tensile strength and elongation at cutting> Using a cross-linked sheet with a thickness of 2 mm, using a tensile tester (Tencilon RTG-1310 manufactured by A & D Co., Ltd.), according to JIS K6251: 2010, under the condition of 500 mm / min, dumbbell No. 6 100% modulus (M100), tensile strength and elongation at break were measured at 23 ° C.
- ⁇ Hardness> Three crosslinked sheets having a thickness of 2 mm were stacked, and the durometer hardness (type A, value after 3 seconds) was measured according to JIS K6251-3: 2012.
- Fluorororubber A Vinylidene Fluoride / Hexafluoropropylene Copolymer Molar ratio of vinylidene fluoride / hexafluoropropylene: 78/22 (mol%) Fluorine content: 66% by mass Mooney viscosity (ML1 + 10 (100 ° C)): 69 Glass transition temperature: -18 ° C Heat of fusion: Not recognized in the second run
- Fluororubber B Vinylidene fluoride / hexafluoropropylene / tetrafluoroethylene copolymer Vinyl fluoride / hexafluoropropylene / tetrafluoroethylene molar ratio: 58/22/20 (mol%) Fluorine content: 69% by mass Mooney viscosity (ML1 + 10 (100 ° C)): 42 Glass transition temperature: -13 ° C Enthalpy of fusion: Not recognized in the second run
- Crosslinker-1a 2,7-Dihydroxy-9H-Fluoren-9-on
- Crosslinker-2 2,4'-Dihydroxybenzophenone
- Crosslinker-3 4,4'-Dihydroxybenzophenone
- Crosslinker-4 2,4 '-Dihydroxydiphenyl sulfone cross-linking agent-5: Bis (4-hydroxyphenyl) sulfone cross-linking agent-6: 2,6-dihydroxyanthracene cross-linking agent-7: Hydroquinone cross-linking agent-8: 4,4'-Dihydroxydiphenyl ether
- Examples 1 to 4 and Comparative Examples 1 to 11 Each component was blended according to the formulations shown in Tables 1 to 4 and kneaded on an open roll to prepare a fluororubber cross-linking composition.
- the maximum torque (MH) and the optimum cross-linking time (T90) of the obtained fluororubber cross-linking composition are shown in Tables 1 to 4.
- the fluororubber cross-linking composition was cross-linked by a primary cross-linking (press cross-linking) at 180 ° C. for 20 minutes and a secondary cross-linking (oven cross-linking) at 230 ° C. for 24 hours, and a cross-linked sheet (thickness 2 mm) was obtained. And a small test piece for compression permanent strain measurement was obtained.
- the evaluation results of the obtained crosslinked sheet and the results of the compression set are shown in Tables 1 to 4.
- Example 5 In a glass container, 3.00 g (7.71 mmol) of benzyltriphenylphosphonium chloride (BTPPC) was dissolved in 25.0 g of methanol, and 2,7-dihydroxy-9H-fluoren-9-on 6.50 g (30) was dissolved therein. .6 mmol) was added at room temperature with stirring. This was transferred to an aluminum container and heated while stirring on a hot plate at 90 ° C. to distill off methanol and concentrate. Further, this concentrate was heated to dryness in an oven at 120 ° C. for 16 hours to obtain 9.40 g of a mixture A of 2,7-dihydroxy-9H-fluorene-9-one and BTPPC.
- BTPPC benzyltriphenylphosphonium chloride
- the combined recovery rate of 2,7-dihydroxy-9H-fluorene-9-one and BTPPC was 98.9% by mass. Further, the mass of the solid obtained by heating 1.00 g of the mixture A in an oven at 120 ° C. for 1 hour was also 1.00 g, and the mass did not change before and after the heat treatment.
- the component ratio of 2,7-dihydroxy-9H-fluorene-9-one in the mixture A is maximized when the entire amount of 2,7-dihydroxy-9H-fluorene-9-one charged is recovered. And it is 69.1% by mass. The minimum is when all that could not be recovered was 2,7-dihydroxy-9H-fluorene-9-one, which is 68.1% by mass. Therefore, of the 3.19 parts by mass of the mixture A used for preparing the fluororubber cross-linking composition, 2,7-dihydroxy-9H-fluorene-9-one was 2.17 to 2.20 parts by mass. be.
- the fluororubber cross-linking composition containing 2,7-dihydroxy-9H-fluorene-9-one is a molded product having excellent compression set characteristics at high temperatures. Has been obtained (Examples 1 to 5).
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Abstract
Description
本開示のフッ素ゴム架橋用組成物において、架橋剤(b)の含有量が、フッ素ゴム(a)100質量部に対し、0.1~10質量部であることが好ましい。
本開示のフッ素ゴム架橋用組成物は、架橋促進剤(c)をさらに含有することが好ましい。
本開示のフッ素ゴム架橋用組成物において、架橋促進剤(c)の含有量が、フッ素ゴム(a)100質量部に対し、0.1~10質量部であることが好ましい。
本開示のフッ素ゴム架橋用組成物は、受酸剤(d)をさらに含有することが好ましい。
本開示のフッ素ゴム架橋用組成物において、受酸剤(d)の含有量が、フッ素ゴム(a)100質量部に対し、0.1~50質量部であることが好ましい。
本開示のフッ素ゴム架橋用組成物において、受酸剤(d)が、金属酸化物、金属水酸化物、アルカリ金属ケイ酸塩、弱酸の金属塩およびハイドロタルサイトからなる群より選択される少なくとも1種であることが好ましい。
本開示のフッ素ゴム架橋用組成物において、架橋剤(b)が、2,7-ジヒドロキシ-9H-フルオレン-9-オン、および、2,7-ジヒドロキシ-9H-フルオレン-9-オンと、アルカリ金属、アルカリ土類金属またはオニウム化合物との塩からなる群より選択される少なくとも1種であることが好ましい。
本開示のフッ素ゴム架橋用組成物は、ジアルキルスルホン化合物をさらに含有することが好ましい。
本開示で用いるポリオール架橋可能なフッ素ゴムは、ポリオール架橋可能な部位を有するフッ素ゴムである。本開示において、フッ素ゴムとは、非晶質フルオロポリマーである。「非晶質」とは、フルオロポリマーの示差走査熱量測定〔DSC〕(昇温速度20℃/分)あるいは示差熱分析〔DTA〕(昇温速度20℃/分)において現われた融解ピーク(ΔH)の大きさが4.5J/g以下であることをいう。フッ素ゴムは、架橋することにより、エラストマー特性を示す。エラストマー特性とは、ポリマーを延伸することができ、ポリマーを延伸するのに必要とされる力がもはや適用されなくなったときに、その元の長さを保持できる特性を意味する。
(式中、構造単位M1はビニリデンフルオライド(m1)由来の構造単位であり、構造単位M2は含フッ素エチレン性単量体(m2)由来の構造単位であり、構造単位N1は単量体(m1)および単量体(m2)と共重合可能な単量体(n1)由来の繰り返し単位である)
CF2=CFO(Rf1O)q(Rf2O)rRf3 (2)
(式中、Rf1およびRf2はそれぞれ独立に炭素数1~6の直鎖または分岐したパーフルオロアルキレン基、Rf3は炭素数1~6の直鎖または分岐したパーフルオロアルキル基、qおよびrはそれぞれ独立に0~6の整数(ただし0<q+r≦6を満たす)である)で表される含フッ素単量体、一般式(3):
CHX11=CX12Rf4 (3)
(式中、X11およびX12は、一方がHであり、他方がFであり、Rf4は炭素数1~12の直鎖または分岐したフルオロアルキル基である)で表される含フッ素単量体、フッ化ビニルなどの含フッ素単量体があげられるが、これらのなかでも、TFE、HFP、PAVEが好ましい。
CY1 2=CY1-Rf5CHR1X1 (4)
(式中、Y1は、独立に、水素原子、フッ素原子または-CH3、Rf5は、フルオロアルキレン基、パーフルオロアルキレン基、フルオロポリオキシアルキレン基またはパーフルオロポリオキシアルキレン基、R1は、水素原子または-CH3、X1は、ヨウ素原子または臭素原子)で表されるヨウ素または臭素含有単量体、一般式(5):
CF2=CFO(CF2CF(CF3)O)m(CF2)n-X2 (5)
(式中、mは、0~5の整数、nは、1~3の整数、X2は、シアノ基、カルボキシル基、アルコキシカルボニル基、臭素原子、ヨウ素原子)で表される単量体、一般式(6):
CH2=CH(CF2)pI (6)
(式中、pは1~10の整数)で表される単量体などがあげられ、たとえば特公平5-63482号公報、特開平7-316234号公報に記載されているようなパーフルオロ(6,6-ジヒドロ-6-ヨード-3-オキサ-1-ヘキセン)やパーフルオロ(5-ヨード-3-オキサ-1-ペンテン)などのヨウ素含有単量体、特開平4-217936号公報記載のCF2=CFOCF2CF2CH2Iなどのヨウ素含有単量体、特開昭61-55138号公報に記載されている4-ヨード-3,3,4,4-テトラフルオロ-1-ブテンなどのヨウ素含有単量体、特開平4-505341号公報に記載されている臭素含有単量体、特開平4-505345号公報、特開平5-500070号公報に記載されているようなシアノ基含有単量体、カルボキシル基含有単量体、アルコキシカルボニル基含有単量体などがあげられる。これらをそれぞれ単独で、または任意に組合わせて用いることができる。
またビスオレフィン化合物としては特開平8-12726号公報に記載されたものを用いることができる。
本開示のフッ素ゴム架橋用組成物は、架橋剤を含有する。架橋剤は、下記一般式(b)で示される化合物、および、前記化合物と、アルカリ金属、アルカリ土類金属またはオニウム化合物との塩からなる群より選択される少なくとも1種である。
本開示のフッ素ゴム架橋用組成物は、架橋促進剤を含むことが好ましい。架橋促進剤を用いると、フッ素ゴム主鎖の脱フッ酸反応における分子内二重結合の形成を促進することにより架橋反応を促進することができる。架橋剤として、一般式(b)で示される化合物、および、一般式(b)で示される化合物と、アルカリ金属またはアルカリ土類金属またはオニウム化合物との塩から選択される1種の化合物を用いる場合には、架橋促進剤を架橋剤とともに用いることが好ましい。架橋剤としてオニウム塩を用いる場合でも、架橋促進剤を架橋剤とともに用いることができるが、必ずしも用いる必要はない。架橋条件や成形品の物性により適宜架橋促進剤の量を調整することができる。架橋促進剤を増量すれば、架橋反応は早くなり、またはより低温で架橋できるようになるが、圧縮永久歪み特性は悪化する傾向にある。逆に架橋促進剤を減量すれば架橋反応は遅くなるが、圧縮永久歪み特性は良くなる傾向にある。
本開示のフッ素ゴム架橋用組成物は、受酸剤をさらに含有してもよい。受酸剤を含有することにより、フッ素ゴム架橋用組成物の架橋反応が一層円滑に進行し、高温での圧縮永久歪み特性が一層向上する。
フッ素ゴム架橋用組成物は、必要に応じてフッ素ゴム架橋用組成物に配合される通常の添加物、たとえば充填剤(カーボンブラック、瀝青炭、硫酸バリウム、珪藻土、焼成クレー、タルク等)、加工助剤(ワックス等)、可塑剤、着色剤、安定剤、粘着性付与剤(クマロン樹脂、クマロン・インデン樹脂等)、離型剤、導電性付与剤、熱伝導性付与剤、表面非粘着剤、柔軟性付与剤、耐熱性改善剤、難燃剤、発泡剤、国際公開第2012/023485号に記載の酸化防止剤などの各種添加剤を配合することができ、前記のものとは異なる常用の架橋剤、架橋促進剤を1種またはそれ以上配合してもよい。
フッ素ゴム架橋用組成物を架橋することにより、本開示の成形品を得ることができる。また、フッ素ゴム架橋用組成物を成形し、架橋することによっても、本開示の成形品を得ることができる。フッ素ゴム架橋用組成物は、従来公知の方法で成形することができる。成形および架橋の方法および条件としては、採用する成形および架橋において公知の方法および条件の範囲内でよい。成形および架橋の順序は限定されず、成形した後架橋してもよいし、架橋した後成形してもよいし、成形と架橋とを同時に行ってもよい。
ブーツは、たとえば、等速ジョイントブーツ、ダストカバー、ラックアンドピニオンステアリングブーツ、ピンブーツ、ピストンブーツなどの自動車用ブーツ、農業機械用ブーツ、産業車両用ブーツ、建築機械用ブーツ、油圧機械用ブーツ、空圧機械用ブーツ、集中潤滑機用ブーツ、液体移送用ブーツ、消防用ブーツ、各種液化ガス移送用ブーツなどの各種産業用ブーツなどの複雑形状成形体として好ましく用いることができる。
19F-NMR(Bruker社製AC300P型)を用いて測定した。
19F-NMRにて測定されたフッ素ゴムの組成から計算によって求めた。
ASTM D1646-15およびJIS K6300-1:2013に準拠して測定した。測定温度は100℃である。
示差走査熱量計(メトラー・トレド社製、DSC822e、もしくは、日立ハイテクサイエンス社製、X-DSC7000)を用い、試料10mgを20℃/分で昇温することによりDSC曲線を得て、DSC曲線の二次転移前後のベースラインの延長線と、DSC曲線の変曲点における接線との交点を示す温度をガラス転移温度とした。
示差走査熱量計(メトラー・トレド社製:DSC822e、もしくは、日立ハイテクサイエンス社製、X-DSC7000)を用い、試料10mgを20℃/分で昇温することによりDSC曲線を得て、DSC曲線において現われた融解ピーク(ΔH)の大きさから融解熱を算出した。
フッ素ゴム架橋用組成物について、一次架橋時に加硫試験機(エムアンドケー社製 MDR H2030)を用いて、180℃で架橋曲線を求め、トルクの変化より、最大トルク(MH)および最適架橋時間(T90)を求めた。
厚さ2mmの架橋シートを用いて、引張試験機(エー・アンド・デイ社製テンシロンRTG-1310)を使用して、JIS K6251:2010に準じて、500mm/分の条件下、ダンベル6号にて、23℃における100%モジュラス(M100)、引張強さおよび切断時伸びを測定した。
<硬さ>
厚さ2mmの架橋シートを3枚重ねて、JIS K6251-3:2012に準じて、デュロメータ硬さ(タイプA、3秒後の値)を測定した。
圧縮永久歪み測定用小形試験片を用いて、JIS K6262:2013のA法に準じて、圧縮率25%、試験温度200℃、試験時間72時間で測定した。
フッ素ゴムA:フッ化ビニリデン/ヘキサフルオロプロピレン共重合体
フッ化ビニリデン/ヘキサフルオロプロピレンのモル比:78/22(モル%)
フッ素含有率:66質量%
ムーニー粘度(ML1+10(100℃)):69
ガラス転移温度:-18℃
融解熱:セカンドランでは認めず
フッ素ゴムB:フッ化ビニリデン/ヘキサフルオロプロピレン/テトラフルオロエチレン共重合体
フッ化ビニリデン/ヘキサフルオロプロピレン/テトラフルオロエチレンのモル比:58/22/20(モル%)
フッ素含有率:69質量%
ムーニー粘度(ML1+10(100℃)):42
ガラス転移温度:-13℃
融解熱:セカンドランでは認めず
水酸化カルシウム
酸化マグネシウム
スルホラン
架橋促進剤A:ベンジルジメチルオクタデシルアンモニウムクロリド91質量%とイソプロピルアルコール9質量%との混合物
架橋促進剤B:ベンジルトリフェニルホスホニウムクロリド(BTPPC)
架橋促進剤C:8-ベンジル-1,8-ジアザビシクロ[5,4,0]-7-ウンデセニウムクロリド(DBU-B)
架橋剤-2:2,4’-ジヒドロキシベンゾフェノン
架橋剤-3:4,4’-ジヒドロキシベンゾフェノン
架橋剤-4:2,4’-ジヒドロキシジフェニルスルホン
架橋剤-5:ビス(4-ヒドロキシフェニル)スルホン
架橋剤-6:2,6-ジヒドロキシアントラセン
架橋剤-7:ハイドロキノン
架橋剤-8:4,4’-ジヒドロキシジフェニルエーテル
表1~4の処方に従ってそれぞれの成分を配合し、オープンロール上で混練りして、フッ素ゴム架橋用組成物を調製した。得られたフッ素ゴム架橋用組成物の最大トルク(MH)および最適架橋時間(T90)を表1~4に示す。次に、180℃で20分間の一次架橋(プレス架橋)、および、230℃で24時間の二次架橋(オーブン架橋)により、フッ素ゴム架橋用組成物を架橋させ、架橋シート(厚さ2mm)および圧縮永久歪み測定用小形試験片を得た。得られた架橋シートの評価結果および圧縮永久歪み試験の結果を表1~4に示す。
ガラス容器中で、ベンジルトリフェニルホスホニウムクロリド(BTPPC)3.00g(7.71mmol)をメタノール25.0gに溶解させ、これに2,7-ジヒドロキシ-9H-フルオレン-9-オン6.50g(30.6mmol)を室温下攪拌しながら加えた。これをアルミ製容器に移し、90℃の熱盤上で攪拌しながら加熱してメタノールを留去し濃縮した。さらにこの濃縮物を120℃のオーブン中16時間加熱して乾固させ、2,7-ジヒドロキシ-9H-フルオレン-9-オンとBTPPCの混合物である混合物A9.40gを得た。2,7-ジヒドロキシ-9H-フルオレン-9-オンとBTPPCを合わせた回収率は98.9質量%であった。さらに混合物Aのうち1.00gを120℃のオーブン中1時間加熱して得られた固形物の質量も1.00gであり、熱処理前後で質量の変化はなかった。
Claims (11)
- フッ素ゴム(a)が、ビニリデンフルオライド単位を含む請求項1に記載のフッ素ゴム架橋用組成物。
- 架橋剤(b)の含有量が、フッ素ゴム(a)100質量部に対し、0.1~10質量部である請求項1または2に記載のフッ素ゴム架橋用組成物。
- 架橋促進剤(c)をさらに含有する請求項1~3のいずれかに記載のフッ素ゴム架橋用組成物。
- 架橋促進剤(c)の含有量が、フッ素ゴム(a)100質量部に対し、0.1~10質量部である請求項4に記載のフッ素ゴム架橋用組成物。
- 受酸剤(d)をさらに含有する請求項1~5のいずれかに記載のフッ素ゴム架橋用組成物。
- 受酸剤(d)の含有量が、フッ素ゴム(a)100質量部に対し、0.1~50質量部である請求項6に記載のフッ素ゴム架橋用組成物。
- 受酸剤(d)が、金属酸化物、金属水酸化物、アルカリ金属ケイ酸塩、弱酸の金属塩およびハイドロタルサイトからなる群より選択される少なくとも1種である請求項6または7に記載のフッ素ゴム架橋用組成物。
- 架橋剤(b)が、2,7-ジヒドロキシ-9H-フルオレン-9-オン、および、2,7-ジヒドロキシ-9H-フルオレン-9-オンと、アルカリ金属、アルカリ土類金属またはオニウム化合物との塩からなる群より選択される少なくとも1種である請求項1~8のいずれかに記載のフッ素ゴム架橋用組成物。
- ジアルキルスルホン化合物をさらに含有する請求項1~9のいずれかに記載のフッ素ゴム架橋用組成物。
- 請求項1~10のいずれかに記載のフッ素ゴム架橋用組成物から得られる成形品。
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Cited By (4)
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WO2022210041A1 (ja) * | 2021-04-02 | 2022-10-06 | ダイキン工業株式会社 | フッ素ゴム架橋用組成物、成形品およびシール材 |
WO2022210040A1 (ja) * | 2021-04-02 | 2022-10-06 | ダイキン工業株式会社 | フッ素ゴム架橋用組成物、成形品およびシール材 |
WO2022264837A1 (ja) * | 2021-06-16 | 2022-12-22 | ダイキン工業株式会社 | フッ素ゴム架橋用組成物、成形品およびシール材 |
WO2022264838A1 (ja) * | 2021-06-15 | 2022-12-22 | ダイキン工業株式会社 | フッ素ゴム架橋用組成物、成形品およびシール材 |
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Cited By (6)
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WO2022210041A1 (ja) * | 2021-04-02 | 2022-10-06 | ダイキン工業株式会社 | フッ素ゴム架橋用組成物、成形品およびシール材 |
WO2022210040A1 (ja) * | 2021-04-02 | 2022-10-06 | ダイキン工業株式会社 | フッ素ゴム架橋用組成物、成形品およびシール材 |
WO2022264838A1 (ja) * | 2021-06-15 | 2022-12-22 | ダイキン工業株式会社 | フッ素ゴム架橋用組成物、成形品およびシール材 |
JP2022191171A (ja) * | 2021-06-15 | 2022-12-27 | ダイキン工業株式会社 | フッ素ゴム架橋用組成物、成形品およびシール材 |
JP7385152B2 (ja) | 2021-06-15 | 2023-11-22 | ダイキン工業株式会社 | フッ素ゴム架橋用組成物、成形品およびシール材 |
WO2022264837A1 (ja) * | 2021-06-16 | 2022-12-22 | ダイキン工業株式会社 | フッ素ゴム架橋用組成物、成形品およびシール材 |
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US20230250259A1 (en) | 2023-08-10 |
CN116034131B (zh) | 2023-10-10 |
CN116034131A (zh) | 2023-04-28 |
US20230183465A1 (en) | 2023-06-15 |
EP4215576A8 (en) | 2023-09-27 |
JPWO2022059575A1 (ja) | 2022-03-24 |
CN116113660A (zh) | 2023-05-12 |
JP7425375B2 (ja) | 2024-01-31 |
JP7425374B2 (ja) | 2024-01-31 |
KR20230067656A (ko) | 2023-05-16 |
JPWO2022059576A1 (ja) | 2022-03-24 |
EP4215576A1 (en) | 2023-07-26 |
KR20230067657A (ko) | 2023-05-16 |
EP4215577A8 (en) | 2023-09-27 |
EP4215577A1 (en) | 2023-07-26 |
TW202222947A (zh) | 2022-06-16 |
WO2022059576A1 (ja) | 2022-03-24 |
TW202225304A (zh) | 2022-07-01 |
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