WO2022224856A1 - シール部材 - Google Patents
シール部材 Download PDFInfo
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- WO2022224856A1 WO2022224856A1 PCT/JP2022/017474 JP2022017474W WO2022224856A1 WO 2022224856 A1 WO2022224856 A1 WO 2022224856A1 JP 2022017474 W JP2022017474 W JP 2022017474W WO 2022224856 A1 WO2022224856 A1 WO 2022224856A1
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- mass
- reinforcing material
- thermoplastic elastomer
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- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims description 11
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- MQWFLKHKWJMCEN-UHFFFAOYSA-N n'-[3-[dimethoxy(methyl)silyl]propyl]ethane-1,2-diamine Chemical compound CO[Si](C)(OC)CCCNCCN MQWFLKHKWJMCEN-UHFFFAOYSA-N 0.000 description 1
- KBJFYLLAMSZSOG-UHFFFAOYSA-N n-(3-trimethoxysilylpropyl)aniline Chemical compound CO[Si](OC)(OC)CCCNC1=CC=CC=C1 KBJFYLLAMSZSOG-UHFFFAOYSA-N 0.000 description 1
- HMDRAGZZZBGZJC-UHFFFAOYSA-N n-[3-[3-aminopropoxy(dimethoxy)silyl]propyl]-1-phenylprop-2-en-1-amine Chemical compound NCCCO[Si](OC)(OC)CCCNC(C=C)C1=CC=CC=C1 HMDRAGZZZBGZJC-UHFFFAOYSA-N 0.000 description 1
- GKTNLYAAZKKMTQ-UHFFFAOYSA-N n-[bis(dimethylamino)phosphinimyl]-n-methylmethanamine Chemical class CN(C)P(=N)(N(C)C)N(C)C GKTNLYAAZKKMTQ-UHFFFAOYSA-N 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- RXOHFPCZGPKIRD-UHFFFAOYSA-N naphthalene-2,6-dicarboxylic acid Chemical compound C1=C(C(O)=O)C=CC2=CC(C(=O)O)=CC=C21 RXOHFPCZGPKIRD-UHFFFAOYSA-N 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- MSRJTTSHWYDFIU-UHFFFAOYSA-N octyltriethoxysilane Chemical compound CCCCCCCC[Si](OCC)(OCC)OCC MSRJTTSHWYDFIU-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 125000002255 pentenyl group Chemical group C(=CCCC)* 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920003216 poly(methylphenylsiloxane) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052903 pyrophyllite Inorganic materials 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 150000003873 salicylate salts Chemical class 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910021647 smectite Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000005477 standard model Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 239000012974 tin catalyst Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
- ALVYUZIFSCKIFP-UHFFFAOYSA-N triethoxy(2-methylpropyl)silane Chemical compound CCO[Si](CC(C)C)(OCC)OCC ALVYUZIFSCKIFP-UHFFFAOYSA-N 0.000 description 1
- WUMSTCDLAYQDNO-UHFFFAOYSA-N triethoxy(hexyl)silane Chemical compound CCCCCC[Si](OCC)(OCC)OCC WUMSTCDLAYQDNO-UHFFFAOYSA-N 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- XYJRNCYWTVGEEG-UHFFFAOYSA-N trimethoxy(2-methylpropyl)silane Chemical compound CO[Si](OC)(OC)CC(C)C XYJRNCYWTVGEEG-UHFFFAOYSA-N 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L21/00—Compositions of unspecified rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
Definitions
- Rubber such as thermosetting elastomer
- thermosetting elastomer is widely known as a material with excellent flexibility.
- thermosetting elastomer is used, a thermosetting process is required. Therefore, a thermoplastic elastomer is widely known as a material that has rubber elasticity and flexibility and that can be melt-molded.
- thermoplastic elastomer reinforced with a reinforcing material when used for a sealing member that is involved in sliding, wear resistance is excellent, but there is a problem that sealing performance is not sufficient.
- it is necessary to lower the hardness in order to develop excellent sealing properties but in this case there is a problem that the wear resistance is lowered. Therefore, thermoplastic elastomers reinforced with reinforcing materials have the problem that it is difficult to achieve both wear resistance and sealability. In particular, when it is used for a sealing member which involves sliding with resin, this tendency is remarkable.
- Item 2 The sealing member according to Item 1, wherein the reinforcing material (B) is a fibrous reinforcing material.
- Item 8 The sealing member according to any one of items 1 to 7, wherein the resin composition further contains a silicone resin (C).
- Item 11 The sealing member according to any one of Items 1 to 10, which is used for applications involving sliding with resin.
- Item 12 The sealing member according to any one of Items 1 to 11, which is a medical sealing member.
- the sealing member of the present invention is a sealing member composed of a molding of a resin composition.
- the resin composition contains a thermoplastic elastomer (A) and a reinforcing material (B) having a Mohs hardness of 5 or less.
- A thermoplastic elastomer
- B reinforcing material
- the resin composition used in the present invention contains a thermoplastic elastomer (A) and a reinforcing material (B) having a Mohs hardness of 5 or less, and optionally contains a silicone resin (C) and other additives.
- A thermoplastic elastomer
- B reinforcing material
- C silicone resin
- thermoplastic elastomer (A) depending on the type of soft segment and hard segment, for example, styrene-based thermoplastic elastomer (TPS), olefin-based thermoplastic elastomer (TPO), vinyl chloride-based thermoplastic elastomer (TPVC), urethane-based A thermoplastic elastomer (TPU), a polyester thermoplastic elastomer (TPEE), or the like can be used.
- TPS styrene-based thermoplastic elastomer
- TPO olefin-based thermoplastic elastomer
- TPVC vinyl chloride-based thermoplastic elastomer
- TPU urethane-based A thermoplastic elastomer
- TPEE polyester thermoplastic elastomer
- the polyalkylene ether glycol is the main component of the aliphatic polyether block (y) means that the polyalkylene ether glycol accounts for 50 mol% or more, preferably 70 mol%, in the aliphatic polyether block (y). It means mol % or more, more preferably 90 mol % or more.
- a polyester thermoplastic elastomer is produced by producing a polyester oligomer from a dicarboxylic acid or its ester-forming derivative and a low-molecular-weight glycol or its ester-forming derivative. It can be produced by mixing a fixed amount and copolymerizing with a tin catalyst or the like.
- the MFR value measured under conditions of 230° C. and a load of 21 N is preferably 0.1 g/10 min or more, preferably 3 g/10 min or more. and more preferably 5 g/10 min or more.
- the MFR value measured under conditions of 230° C. and a load of 21 N is preferably 15 g/10 min or less, more preferably 12 g/10 min or less, even more preferably 10 g/10 min or less.
- the MFR value of the thermoplastic elastomer (A) can be measured according to JIS K 7210 (ISO1133).
- the thermoplastic elastomer (A) preferably has an observable melting point. From the viewpoint of further improving the heat resistance, the melting point of the thermoplastic elastomer (A) is preferably 100°C or higher. On the other hand, from the viewpoint of integral molding with other materials, the melting point of the thermoplastic elastomer (A) is preferably 210° C. or less. The melting point can be measured according to JIS-K7121. Here, when the thermoplastic elastomer (A) has two or more melting points due to the presence of two or more hard segments, the thermoplastic elastomer (A) is sufficiently melted to form the seal member. Therefore, the highest melting point is treated as the melting point of the thermoplastic elastomer (A).
- the melting point of the thermoplastic elastomer (A) is a value measured using a differential scanning calorimeter (DSC).
- the thermoplastic elastomer (A) may be used alone or in combination of two or more as long as it satisfies the above structure, properties and the like.
- thermoplastic elastomer (A) is not particularly limited as long as it can be melt-kneaded, and any of powder, granules, and pellets can be used.
- the content of the thermoplastic elastomer (A) in the resin composition is preferably 30% by mass to 97% by mass, more preferably 42% by mass to 95% by mass, based on 100% by mass of the total amount of the resin composition. is more preferable, and 60% by mass to 90% by mass is even more preferable.
- the sealing performance of the sealing member can be further enhanced.
- the reinforcing material (B) used in the present invention is a powdery reinforcing material composed of particles having a Mohs hardness of 5 or less, preferably a Mohs hardness of more than 3 and 5 or less.
- the reinforcing material (B) is not particularly limited in particle shape as long as it improves the strength and rigidity of the resin composition.
- a fibrous reinforcing material that is a powder composed of fibrous particles
- fibrous reinforcing materials include inorganic fibers such as potassium titanate fibers, wollastonite fibers, zinc oxide fibers, basic magnesium sulfate fibers, alumina fibers, silicon carbide fibers, and boron fibers. These reinforcing materials (B) may be used alone or in combination of multiple types.
- the average fiber length of the fibrous reinforcing material is preferably 300 ⁇ m or less, more preferably 1 ⁇ m to 300 ⁇ m, from the viewpoint of further improving wear resistance while further suppressing a decrease in the reinforcing effect of the fibrous reinforcing material. It is preferably between 1 ⁇ m and 200 ⁇ m, particularly preferably between 3 ⁇ m and 100 ⁇ m, most preferably between 5 ⁇ m and 50 ⁇ m.
- the average aspect ratio of the fibrous reinforcing material is preferably 3-200, more preferably 3-100, even more preferably 3-50, particularly preferably 3-40.
- a fibrous particle is a rectangular parallelepiped having the smallest volume among the rectangular parallelepipeds circumscribing the particle (circumscribing rectangular parallelepiped).
- L/B and L/T are both particles of 3 or more
- the major axis L corresponds to the fiber length
- the minor axis B corresponds to the fiber diameter.
- Plate-like particles refer to particles having an L/B of less than 3 and an L/T of 3 or more.
- the reinforcing material (B) is at least one of potassium titanate fiber and wollastonite fiber from the viewpoint of further improving wear resistance while further suppressing a decrease in the reinforcing effect of the reinforcing material (B). is preferred, potassium titanate fibers or wollastonite fibers are more preferred, and potassium titanate fibers are even more preferred.
- Potassium titanate fibers have, for example, the general formula K 2 O.nTiO 2 (wherein n is an integer of 2 to 8) or the general formula K 2 O.nTiO 2.1/2H 2 O (wherein n is 2 to Integer of 8) and the like can be mentioned. Specific examples thereof include 4-potassium titanate fibers, 6-potassium titanate fibers, 8-potassium titanate fibers, and mixtures thereof.
- the dimensions of the potassium titanate fibers are not particularly limited as long as they are within the above dimensions, but the average fiber length is preferably 1 ⁇ m to 50 ⁇ m, more preferably 3 ⁇ m to 30 ⁇ m, and still more preferably 3 ⁇ m to 20 ⁇ m.
- the average fiber diameter is preferably 0.01 ⁇ m to 1 ⁇ m, more preferably 0.05 ⁇ m to 0.8 ⁇ m, still more preferably 0.1 ⁇ m to 0.7 ⁇ m.
- the average aspect ratio is preferably 10 or more, more preferably 10-100, still more preferably 15-35.
- These potassium titanate fibers can also be used as commercially available products, such as "TISMO D" (average fiber length 15 ⁇ m, average fiber diameter 0.5 ⁇ m), diameter 0.5 ⁇ m) or the like can be used.
- Wollastonite fibers are inorganic fibers made of calcium metasilicate, and conventionally known ones can be widely used.
- the size of the wollastonite fiber is not particularly limited as long as it is within the size range of the fibrous reinforcing material described above. be.
- the average fiber diameter is preferably 0.1 ⁇ m to 15 ⁇ m, more preferably 1 ⁇ m to 10 ⁇ m, still more preferably 2 ⁇ m to 7 ⁇ m.
- the average aspect ratio is preferably 3 or more, more preferably 3-30, still more preferably 3-15.
- These wollastonite fibers can also be used as commercially available products, for example, "Bistal W" (average fiber length: 25 ⁇ m, average fiber diameter: 3 ⁇ m) manufactured by Otsuka Chemical Co., Ltd. can be used.
- the above average fiber length and average fiber diameter can be measured by observation with a scanning electron microscope, and the average aspect ratio (average fiber length/average fiber diameter) can be calculated from the average fiber length and average fiber diameter. For example, with a scanning electron microscope, a plurality of fibrous reinforcing materials are photographed, 300 fibrous reinforcing materials are arbitrarily selected from the observed image, their fiber lengths and fiber diameters are measured, and all of the fiber lengths are measured.
- the average fiber length can be obtained by accumulating and dividing by the number, and the average fiber diameter can be obtained by accumulating all the fiber diameters and dividing by the number.
- the surface of the reinforcing material (B) is subjected to surface treatment.
- a treatment layer made of an agent may be formed.
- Examples of surface treatment agents include silane coupling agents and titanium coupling agents. Among these, silane coupling agents are preferable, and amino-based silane coupling agents, epoxy-based silane coupling agents, and alkyl-based silane coupling agents are more preferable. One of the surface treating agents may be used alone, or two or more thereof may be used in combination.
- amino-based silane coupling agents include N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane, N-2-(aminoethyl)-3-aminopropyltrimethoxysilane, 3-aminopropyltri Methoxysilane, 3-aminopropyltriethoxysilane, 3-ethoxysilyl-N-(1,3-dimethylbutylidene)propylamine, N-phenyl-3-aminopropyltrimethoxysilane, N-(vinylbenzyl)-2 -aminoethyl-3-aminopropyltrimethoxysilane and the like.
- a known surface treatment method can be used as a method for forming a treatment layer comprising a surface treatment agent on the surface of the reinforcing material (B).
- a method of dissolving the surface treatment agent in a mixed solvent) to form a solution and spraying the solution onto the reinforcing material (B) can be used.
- the content of the reinforcing material (B) is set to 0.5% with respect to the entire resin composition, from the viewpoint of further increasing the wear resistance while further suppressing the deterioration of the reinforcing effect of the reinforcing material (B). It is preferably at least 5% by mass, more preferably at least 5% by mass.
- the content of the reinforcing material (B) is preferably 35% by mass or less from the viewpoint of preventing the sealing property from being deteriorated by excessively increasing the reinforcing effect of the reinforcing material (B).
- the mass ratio of the thermoplastic elastomer (A) to the reinforcing material (B) contained in the resin composition (thermoplastic elastomer (A)/reinforcing material (B)) is from 0.86 to 194. preferably 1.2 to 190, more preferably 1.71 to 180, still more preferably 1.71 to 18, particularly preferably 2 to 18, 2 to 8.7 is most preferred.
- the seal member of the present invention further suppresses a decrease in the reinforcing effect of the reinforcing material (B) and improves moldability. Further improvement can be achieved, and both the wear resistance and sealing performance of the sealing member can be improved at a higher level.
- the resin composition used in the present invention may contain a silicone resin (C) as necessary.
- silicone resin (C) is contained, the wear resistance of the sealing material can be further enhanced.
- R 1A is an amino group, a phenyl group, or an amino group substituted with an alkyl group having 2 to 4 amino carbon atoms, an epoxy group, a glycidoxy group, a carboxyl group, a hydroxyl group, an isocyanate group, and an epoxycyclohexyl. It is an alkyl group substituted with 1 to 3 groups selected from the group consisting of groups. l and m are the same as in general formula (1) above. The order of bonding of each repeating unit structure in parentheses is not particularly limited.
- melt-kneading for example, a known melt-kneading device such as a twin-screw extruder can be used. Specifically, (1) a method of premixing each component with a mixer (tumbler, Henschel mixer, etc.), melt-kneading with a melt-kneading device, and pelletizing with a pelletizing means (pelletizer, etc.); (2) A method of preparing a masterbatch of desired components, mixing other components if necessary, melt-kneading them in a melt-kneading device, and pelletizing; (3) a method of supplying each component to a melt-kneading device and pelletizing; can be manufactured by
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
本発明に用いる樹脂組成物は、熱可塑性エラストマー(A)とモース硬度が5以下の補強材(B)とを含有し、必要に応じてシリコーン樹脂(C)と、その他添加剤を含有していてもよい。
本発明に用いる熱可塑性エラストマー(A)とは、常温(20℃)ではゴム状弾性を有し、加熱すると可塑性を示すエラストマーである。すなわち、分子中に、弾性をもつゴム成分(ソフトセグメント)と塑性変形を防止するための分子拘束成分(ハードセグメント)との両成分を有している。
本発明で用いる補強材(B)は、モース硬度が5以下の粒子から構成される粉末状の補強材であり、好ましくはモース硬度が3を超えて5以下である。補強材(B)は、樹脂組成物の強度や剛性を向上させるものであれば、粒子形状は特に限定されるものではないが、例えば、繊維状粒子から構成される粉末である繊維状補強材、板状粒子から構成される粉末である板状補強材等が挙げられ、好ましくは繊維状補強材である。繊維状補強材の具体例としては、例えば、チタン酸カリウム繊維、ワラストナイト繊維、酸化亜鉛繊維、塩基性硫酸マグネシウム繊維、アルミナ繊維、シリコンカーバイド繊維、ボロン繊維等の無機繊維が挙げられる。これらの補強材(B)は、1種を単独で用いてもよく、複数種を併用してもよい。
本発明で用いる樹脂組成物は、必要に応じてシリコーン樹脂(C)を含有していてもよい。シリコーン樹脂(C)を含有する場合、シール材の耐摩耗性をさらに一層高めることができる。
本発明の樹脂組成物は、その好ましい物性を損なわない範囲において、その他添加剤を含有することができる。その他添加剤としては、熱可塑性エラストマー(A)およびシリコーン樹脂(C)を除く熱可塑性樹脂、熱硬化性樹脂;補強材(B)を除く無機充填材(例えば炭酸カルシウム、雲母、マイカ、セリサイト、イライト、タルク、カオリナイト、モンモリナイト、ベーマイト、スメクタイト、バーミキュライト、パリゴルスカイト、パイロフィライト、ハイロサイト、珪藻土、二酸化チタン等);導電性充填剤(例えば金属粒子(例えばアルミニウムフレーク)、金属繊維、金属酸化物粒子、炭素繊維、イオン性液体、界面活性剤等);帯電防止剤(例えばアニオン性帯電防止剤、カチオン性帯電防止剤、非イオン系帯電防止剤等);酸化防止剤および熱安定剤(例えばヒンダードフェノール類、ヒドロキノン類、ホスファイト類およびこれらの置換体等);紫外線吸収剤(例えばレゾルシノール類、サリシレート系、ベンゾトリアゾール類、ベンゾフェノン類、トリアジン類等);光安定剤(例えばヒンダードフェノール類等);耐候剤;耐光剤;離型剤(例えば高級脂肪酸、高級脂肪酸エステル、高級脂肪酸アミド、高級脂肪酸金属塩(ここで高級脂肪酸とは炭素原子数10~25のものをいう)、脂肪酸、脂肪酸金属塩等);滑剤;流動性改良剤;可塑剤(例えばポリエステル系可塑剤、グリセリン系可塑剤、多価カルボン酸エステル系可塑剤、リン酸エステル系可塑剤、ポリアルキレングリコール系可塑剤、エポキシ系可塑剤);耐衝撃性改良剤;難燃剤(例えばホスファゼン系化合物、リン酸エステル、縮合リン酸エステル、無機リン系、ハロゲン系、シリコーン系難燃剤、金属酸化物系難燃剤、金属水酸化物系難燃剤、有機金属塩系難燃剤、窒素系難燃剤、ホウ素化合物系難燃剤等);ドリッピング防止剤;核形成剤;分散剤;制振剤;中和剤;ブロッキング防止剤等が挙げられる。その他添加剤は、これらの1種または2種以上を含有することができる。
本発明に用いる樹脂組成物は、熱可塑性エラストマー(A)と、モース硬度が5以下の粒子から構成される粉末状の補強材(B)とに加え、必要に応じて、シリコーン樹脂(C)と、その他添加剤を含む混合物を、加熱および混合(特に、溶融混練)することによって製造することができる。
本発明の樹脂組成物は、目的とするシール部材の種類、用途、形状等に応じて、射出成形、インサート成形、圧縮成形、ブロー成形、インフレーション成形、共押出成形等の公知の樹脂成形方法により成形することでシール部材とすることができる。樹脂成形方法としては、射出成形、インサート成形が好ましい。また、上記の成形方法を組み合わせた成形方法を採用することができる。
シリコーン樹脂:熱可塑性樹脂用シリコーン添加剤(旭化成ワッカーシリコーン社製、商品名「GENIOPLAST(登録商標)PelletS」、ヒュームドシリカの含有量:30質量%)
チタン酸カリウム繊維:平均繊維長15μm、平均繊維径0.5μm、モース硬度:4(大塚化学社製、商品名「ティスモN102」)
ワラストナイト繊維:平均繊維長25μm、平均繊維径3μm、モース硬度:4.5(大塚化学社製、商品名「バイスタルW」)
ガラス繊維:(日本電気硝子社製、商品名「ECS03 T-289」、平均繊維長3mm、平均繊維径16μm、モース硬度:6)
表1に示す配合割合で、各材料を二軸押出機を用いて溶融混練し、それぞれペレット形状の樹脂組成物を製造した。なお、二軸押出機のシリンダ温度は、180℃であった。
(摩擦摩耗試験)
上記で作製した摩擦摩耗性試験片について、JIS K7218 A法に準じ、鈴木式摩擦摩耗試験機(EFM-III-F、エー・アンド・デイ社製)を用いて比摩耗量(自材摩耗体積)、さらに相手材の比摩耗量(相手材摩耗体積)を測定した。試験条件は、面圧0.12MPa、周速度0.1m/秒、10秒摺動の後、10秒静止を連続で100サイクル、相手材(材質:ポリカーボネート樹脂、SABIC社製、商品名「レキサン121R」、外径25.6mm、内径20mm、高さ15mmの中空円筒)とした。
タイプAデュロメーター硬さとタイプDデュロメーター硬さは、JIS K 6253-3:2012に準拠して測定した。なお、タイプAデュロメーターとしては、ムラテックKDS社製、品番「ゴム硬度計 Aタイプ標準型DM-104A」を用いた。また、タイプDデュロメーターとしては、上島製作所社製、品番「UF.SHORE.S DUROMETER TYPE D」を用いた。
上記で作製したシール性評価試験片に対し、10mLの水を入れた10mLビュレットを垂直に設置し、300g荷重をかけた後に、ビュレットのコックを開き、水がシール性評価試験片から漏れないかを観察した。なお、シール性の評価基準としては、ビュレットのコックを開いてから30秒間放置し、シール性評価試験片から水が漏れたか否かを評価した。評価としては、ビュレット先端からの水漏れ量を測定し、水漏れ量が0.1ml以下のものを〇とし、水漏れ量が0.1mlより多いものを×とした。
JIS K7171に準じ、オートグラフAG-5000(島津製作所社製)にて支点間距離60mmの3点曲げ試験により曲げ強さを測定した。
Claims (12)
- 樹脂組成物の成形体により構成されているシール部材において、
前記樹脂組成物が、熱可塑性エラストマー(A)とモース硬度が5以下の補強材(B)とを含有し、
前記シール部材のデュロメーター硬さをJIS K 6253-3:2012に準拠して測定したときに、タイプAデュロメーター硬さが60より大きく90未満であることを特徴とする、シール部材。 - 前記補強材(B)が繊維状補強材であることを特徴とする、請求項1に記載のシール部材。
- 前記繊維状補強材の平均繊維長が1μm~300μmであることを特徴とする、請求項2に記載のシール部材。
- 前記繊維状補強材が無機繊維であることを特徴とする、請求項2または請求項3に記載のシール部材。
- 前記繊維状補強材がチタン酸カリウム繊維およびワラストナイト繊維のうち少なくとも一方であることを特徴とする、請求項2または請求項3に記載のシール部材。
- 前記熱可塑性エラストマー(A)がポリエステル系熱可塑性エラストマーである、請求項1または請求項2に記載のシール部材。
- 前記樹脂組成物において、前記熱可塑性エラストマー(A)の含有量が60質量%~90質量%であり、補強材(B)の含有量が5質量%~35質量%である、請求項1または請求項2に記載のシール部材。
- 前記樹脂組成物がさらにシリコーン樹脂(C)を含有する、請求項1または請求項2に記載のシール部材。
- 前記樹脂組成物において、前記シリコーン樹脂(C)の含有量が0.1質量%~8質量%である、請求項8に記載のシール部材。
- 前記シリコーン樹脂(C)中におけるヒュームドシリカの含有量が、20質量%以上、40質量%以下である、請求項8に記載のシール部材。
- 樹脂との摺動を伴う用途に用いられる、請求項1または請求項2に記載のシール部材。
- 医療用シール部材である、請求項1または請求項2に記載のシール部材。
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