WO2017159633A1 - シラン化合物、ゴム組成物およびタイヤ - Google Patents
シラン化合物、ゴム組成物およびタイヤ Download PDFInfo
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- WO2017159633A1 WO2017159633A1 PCT/JP2017/010030 JP2017010030W WO2017159633A1 WO 2017159633 A1 WO2017159633 A1 WO 2017159633A1 JP 2017010030 W JP2017010030 W JP 2017010030W WO 2017159633 A1 WO2017159633 A1 WO 2017159633A1
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- 0 C[*+]C(C)C(CC1C2)C2C2C1C1C3OC3C2C1 Chemical compound C[*+]C(C)C(CC1C2)C2C2C1C1C3OC3C2C1 0.000 description 6
- INNPJHURSTYQGM-UHFFFAOYSA-N C=SC(CC1)C2C1CC1OC1C2 Chemical compound C=SC(CC1)C2C1CC1OC1C2 INNPJHURSTYQGM-UHFFFAOYSA-N 0.000 description 1
- UFRRNGYZRVZFNA-UHFFFAOYSA-N C=SCCC(CC1C2)C2C2C1C1C3OC3C2C1 Chemical compound C=SCCC(CC1C2)C2C2C1C1C3OC3C2C1 UFRRNGYZRVZFNA-UHFFFAOYSA-N 0.000 description 1
- IFECIAMRMCTEME-UHFFFAOYSA-N C=[S+]CCC(C1)C2C(CC3OC3C3)C3C1C2 Chemical compound C=[S+]CCC(C1)C2C(CC3OC3C3)C3C1C2 IFECIAMRMCTEME-UHFFFAOYSA-N 0.000 description 1
- AMQOEFLIWDSRDD-UHFFFAOYSA-N CC(C(C1)C2C(CC3OC3C3)C3C1C2)[S+]=C Chemical compound CC(C(C1)C2C(CC3OC3C3)C3C1C2)[S+]=C AMQOEFLIWDSRDD-UHFFFAOYSA-N 0.000 description 1
- QJORMZWEXQYDFH-UHFFFAOYSA-O [SH2+]C(CC1)C2C1C1C3OC3C2C1 Chemical compound [SH2+]C(CC1)C2C1C1C3OC3C2C1 QJORMZWEXQYDFH-UHFFFAOYSA-O 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic System
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/081—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
- C07F7/0812—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te comprising a heterocyclic ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic System
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic System
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/5403—Silicon-containing compounds containing no other elements than carbon or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5435—Silicon-containing compounds containing oxygen containing oxygen in a ring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/548—Silicon-containing compounds containing sulfur
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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
- C08L21/00—Compositions of unspecified rubbers
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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
- C08L7/00—Compositions of natural rubber
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
Definitions
- the present invention relates to a silane compound, a rubber composition containing the silane compound, and a tire. More specifically, a low-polarity silane compound having high reactivity with organic polymer materials such as rubber and high affinity with low-polarity polymer materials, a rubber composition comprising the same, and Regarding tires.
- a silane compound having a reactive functional group and a hydrolyzable group is a silane coupling agent for improving the dispersibility between an organic polymer material such as rubber and an inorganic material such as silica in a rubber composition.
- an organic polymer material such as rubber
- an inorganic material such as silica in a rubber composition.
- silane compounds have been used as adhesive aids for improving adhesion to inorganic materials such as glass in adhesive compositions and sealant compositions.
- such a silane compound has a substituent such as a mercapto group, a polysulfide group, an amino group or an epoxy group as a reactive functional group highly reactive with an organic polymer material such as rubber, and silica or As a hydrolyzable group having high reactivity with an inorganic material such as glass, it has a substituent such as an alkoxysilyl group.
- a substituent such as a mercapto group, a polysulfide group, an amino group or an epoxy group
- JP-A-8-259736 Patent Document 1 discloses a polysulfide-based silane coupling agent.
- JP-A-11-335381 Patent Document 2 discloses a silane compound having an amino group as a reactive functional group and a methoxy group as a hydrolyzable group.
- JP-A-8-259736 Japanese Patent Laid-Open No. 11-335381
- the reactive functional group possessed by the silane compound disclosed in Patent Documents 1 and 2 has a high polarity, and when mixed with a low-polarity polymer material, the affinity between the silane compound and the organic polymer material decreases. There was a tendency for poor dispersion and poor mixing.
- the affinity between the silane compound and the organic polymer material tends to decrease, and the adhesiveness to the inorganic material tends to decrease.
- the present invention has been made in view of the above problems.
- the main object of the present invention is to provide a reactive functional group having a high reactivity with an organic polymer material such as rubber and a low polarity, and a hydrolyzable group having a high reactivity with an inorganic material such as silica or glass. It is providing the silane compound which has.
- the silane compound of the present invention is represented by the following general formula (1).
- R 1 and R 2 each independently represent hydrogen or an alkyl group, but R 1 and R 2 may form a bridged structure represented by — (CH 2 ) e —
- R 3 and R 4 each independently represent hydrogen or an alkyl group, but R 3 and R 4 may form a crosslinked structure represented by — (CH 2 ) f —
- R 5 is hydrogen or an alkyl group
- R 6 is an alkoxy group or an amino group substituted with one or more alkyl groups
- b is preferably an integer of 0 to 3.
- c is preferably an integer of 1 to 5.
- the rubber composition of the present invention is characterized by comprising the silane compound of the present invention, an elastomeric polymer, and an inorganic material.
- silane compound represented by following General formula (2) where X is an integer from 2 to 20, o and o ′ are each independently an integer of 1 to 10, p and q are each independently an integer of 1 to 3, R 11 and R 13 are each independently an amino group substituted with an alkoxy group or one or more alkyl groups, R 12 and R 14 are each independently hydrogen or an alkyl group. )
- the content of the silane compound of the present invention in the rubber composition is preferably 0.1 to 30 parts by mass with respect to 100 parts by mass of the elastomeric polymer.
- the tire of the present invention is characterized by comprising the rubber composition of the present invention.
- FIG. 1 shows a 1 H-NMR chart of silane compound 1 synthesized in Example 1.
- the silane compound of the present invention is represented by the following general formula (1). Since the silane compound of the present invention has high reactivity and has a low-polarity reactive functional group and a hydrolyzable group, even when mixed with a low-polarity polymer material, the dispersion failure or Mixing failure does not occur, and it can be suitably used as a constituent component of a silane coupling agent or a rubber composition. Moreover, it can be used conveniently also as a structural component of an adhesive composition or a sealing agent composition.
- a and b are each independently an integer of 0 to 5, more preferably an integer of 0 to 3, further preferably 0 or 1, particularly preferably 1. is there.
- c is 2 or more, b is independently selected.
- c is an integer of 0 to 10, more preferably an integer of 1 to 5, and still more preferably an integer of 1 to 3.
- d is an integer of 0 to 30, more preferably an integer of 0 to 10, and still more preferably an integer of 0 to 5.
- n is an integer of 1 to 3.
- R 1 and R 2 each independently represent hydrogen or an alkyl group, but R 1 and R 2 form a crosslinked structure represented by — (CH 2 ) e —. May be.
- e is an integer of 1 to 5, more preferably an integer of 1 to 3.
- R 3 and R 4 each independently represent hydrogen or an alkyl group, but R 3 and R 4 form a crosslinked structure represented by — (CH 2 ) f —. May be.
- f is an integer of 1 to 5, more preferably an integer of 1 to 3.
- R 3 and R 4 are each independently selected.
- b is 2 or more
- R 4 is independently selected.
- R 4 is present in an amount of 2 or more.
- R 3 can form a crosslinked structure with any one R 4 and the other R 4 is hydrogen or an alkyl group.
- R 5 is hydrogen or an alkyl group, more preferably an alkyl group having 1 to 30 carbon atoms, still more preferably an alkyl group having 1 to 20 carbon atoms, and specifically, a methyl group Ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, tert-butyl group, pentyl group, cyclopentyl group, hexyl group and cyclohexyl group.
- R 5 is preferably hydrogen, a methyl group or an ethyl group.
- at least one R 5 is an alkyl group.
- d 2 or more in the general formula (1), R 5 is independently selected.
- each R 6 is independently a hydrolyzable group, and (i) an alkoxy group, more preferably an alkoxy group having 1 to 30 carbon atoms, and still more preferably 1 to 20 carbon atoms.
- examples of the alkoxy group include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, a butoxy group, and an isobutoxy group.
- a methoxy group or an ethoxy group is preferable, from the viewpoint of safety.
- the amino group substituted with one or more alkyl groups include N-methylamino group, N, N-dimethylamino group, N-ethylamino group, N, N-diethylamino group, and N-isopropylamino group.
- an N-methylamino group or an N-ethylamino group is preferable.
- the alkoxy group and the amino group may be bonded to silicon (Si) through a linking group such as a hydrocarbon group.
- R 7 is hydrogen or an alkyl group, more preferably an alkyl group having 1 to 30 carbon atoms, still more preferably an alkyl group having 1 to 20 carbon atoms.
- R 7 includes a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a tert-butyl group, a pentyl group, a cyclopentyl group, a hexyl group, and a cyclohexyl group.
- a methyl group And the ethyl group is preferred.
- silane compounds described above the following silane compounds are particularly preferable.
- the silane compound according to the present invention causes an alicyclic epoxy compound having an unsaturated group and a silane compound such as trimethoxysilane or triethoxysilane to undergo a hydrosilylation reaction in the presence of a hydrosilylation catalyst. Can be obtained.
- An alicyclic epoxy compound having an unsaturated group generates, for example, 5-vinyl-2-norbornene (VNB) by Diels-Alder reaction of 1,4-butadiene and cyclopentadiene, and further, VNB and 1,4 Reaction with butadiene to produce 2-ethenyl-1,2,3,4,4a, 5,8,8a-octahydro-1,4-methanonaphthalene (hereinafter sometimes referred to as “VNBB”). It can be obtained by reacting it with a peracid such as peracetic acid.
- VNBB 5-vinyl-2-norbornene
- Silane compounds such as trimethoxysilane and triethoxysilane that are reacted with an alicyclic epoxy compound having an unsaturated group can be obtained, for example, by reacting a corresponding halosilane with an alcohol or an amine.
- the amount of peracid used for the synthesis of the alicyclic epoxy compound is 0.1 to 1.8 mol with respect to 1.00 mol of the alicyclic hydrocarbon compound having an unsaturated group such as VNBB to be reacted. It is preferably 0.5 to 1.5 mol.
- the hydrosilylation catalyst is a catalyst that causes an addition reaction between an aliphatic unsaturated group (alkenyl group, diene group, etc.) in one raw material compound and a silicon-bonded hydrogen atom (that is, SiH group) in the other raw material compound.
- the hydrosilylation catalyst include a platinum group metal catalyst such as a platinum group metal simple substance or a compound thereof.
- platinum group metal-based catalyst conventionally known ones can be used. Specific examples thereof include finely divided platinum metal adsorbed on a support such as silica, alumina or silica gel, platinous chloride, chloroplatinic acid, chlorination.
- Examples thereof include an alcohol solution of platinic acid hexahydrate, a palladium catalyst, and a rhodium catalyst.
- a palladium catalyst examples thereof include an alcohol solution of platinic acid hexahydrate, a palladium catalyst, and a rhodium catalyst.
- Speier catalyst H 2 PtCl 6 ⁇ H 2 O
- Rh catalysts such as Rh catalysts, etc., are preferred, but those containing platinum as the platinum group metal are preferred, and the hydrosilylation catalyst may be used alone or in combination of two or more.
- the addition amount of the hydrosilylation catalyst may be an effective amount that can promote the above addition reaction, and is usually 0.1 ppm (mass basis, hereinafter the same) to the total amount of the raw material compounds in terms of the platinum group metal amount.
- the range is preferably 1% by mass, and more preferably in the range of 1 to 500 ppm. If the addition amount is within this range, the addition reaction is likely to be sufficiently promoted, and the addition reaction rate is likely to increase with an increase in the addition amount, which is economically advantageous.
- a solvent such as toluene is placed in a flask having an atmospheric pressure of nitrogen, and a transition metal catalyst solution such as chloroplatinic acid isopropanol solution is injected.
- a transition metal catalyst solution such as chloroplatinic acid isopropanol solution
- an epoxidized product of VNBB is put, immersed in an oil bath, heated (for example, the bath temperature is set to about 80 ° C.), and a silane compound such as triethoxysilane is dropped therein.
- the bath temperature is preferably 20 to 120 ° C.
- a solvent such as toluene is placed in a flask having an atmospheric pressure of nitrogen, and a transition metal catalyst solution such as chloroplatinic acid isopropanol solution is injected.
- a transition metal catalyst solution such as chloroplatinic acid isopropanol solution
- an epoxidized product of 5-vinyl-2-norbornene (hereinafter referred to as “VNB” in some cases) is put, immersed in an oil bath, heated (for example, the bath temperature is set to about 80 ° C.), and the like.
- a silane compound such as triethoxysilane is added dropwise thereto.
- the bath temperature is preferably 20 to 120 ° C.
- the epoxidized product of VNB can be obtained by reacting VNB with a peracid such as peracetic acid, and VNB can be obtained by the Diels-Alder reaction of 1,4-butadiene and cyclopentadiene.
- a solvent such as toluene is placed in a flask having an atmospheric pressure of nitrogen, and a transition metal catalyst solution such as chloroplatinic acid isopropanol solution is injected.
- a transition metal catalyst solution such as chloroplatinic acid isopropanol solution
- an epoxidized product of 5-vinyl-2-cyclohexene (hereinafter sometimes referred to as “VCH”) is put, immersed in an oil bath and heated (for example, the bath temperature is set to about 80 ° C.).
- a silane compound such as triethoxysilane is added dropwise thereto. At this time, the bath temperature is preferably 20 to 120 ° C.
- the epoxidized product of VCH can be obtained by reacting VCH with a peracid such as peracetic acid, and VCH can be obtained by reacting butadienes with a Diels-Alder reaction.
- a solvent such as toluene is placed in a flask having an atmospheric pressure of nitrogen, and a transition metal catalyst solution such as a chloroplatinic acid IPA solution is injected.
- a transition metal catalyst solution such as a chloroplatinic acid IPA solution
- VDMON 2-ethenyl-1,2,3,4,4a, 5,8,8a-octahydro-1,4,5,8-dimethananaphthalene
- the epoxidized product of VGMON can be obtained by reacting VGMON with peracid such as peracetic acid, and VGMON can be obtained by reacting VNB with cyclopentadiene.
- silane compound satisfying the general formula (1) When a silane compound satisfying the general formula (1) is synthesized by the above method, the following silane compounds can be synthesized as impurities.
- silane coupling agent Since the silane compound of the present invention has a reactive functional group exhibiting high activity while being low in polarity, even when used in combination with a polymer material that does not have a polar group or the like, Since it has excellent affinity (dispersibility) and can maintain reactivity with the polymer material, it can be suitably used as a component of the silane coupling agent.
- the silane compound of this invention can be used suitably as a structural component of a rubber composition.
- the rubber composition contains the silane compound of the present invention, the hardness, tensile properties and viscoelastic properties of the rubber composition can be improved.
- the rubber composition of the present invention can comprise a silane compound represented by the general formula (1), an elastomeric polymer, and an inorganic material.
- the content of the silane compound represented by the general formula (1) is preferably 0.1 to 30 parts by mass, and more preferably 1 to 20 parts by mass with respect to 100 parts by mass of the elastomeric polymer.
- the elastomeric polymer is a generally known natural polymer or synthetic polymer, and is not particularly limited as long as it has a glass transition point of room temperature (25 ° C.) or lower, that is, an elastomer. There may be.
- any rubber that has been conventionally used can be used.
- natural rubber isoprene rubber, butadiene Rubber, 1,2-butadiene rubber, styrene-butadiene rubber, isoprene-butadiene rubber, styrene-isoprene-butadiene rubber, ethylene-propylene-diene rubber, halogenated butyl rubber, halogenated isoprene rubber, halogenated isobutylene copolymer, chloroprene rubber, butyl rubber And diene rubbers such as halogenated isobutylene-p-methylstyrene rubber, nitrile rubber, chloroprene rubber, butyl rubber, ethylene-propylene rubber (EPDM, EPM), ethylene-butene rubber (BBM), chlorosulfonated poly Examples thereof include olefin
- thermoplastic elastomer such as polyolefin-based elastomeric polymer, polyvinyl chloride-based elastomeric polymer, polyurethane-based elastomeric polymer, polyester-based elastomeric polymer or polyamide-based elastomeric polymer.
- thermoplastic elastomer such as polyolefin-based elastomeric polymer, polyvinyl chloride-based elastomeric polymer, polyurethane-based elastomeric polymer, polyester-based elastomeric polymer or polyamide-based elastomeric polymer.
- these can be used individually or as arbitrary blends.
- Preferred elastomeric polymers are natural rubber, butadiene rubber, nitrile rubber, silicone rubber, isoprene rubber, styrene-butadiene rubber, isoprene-butadiene rubber, styrene-isoprene-butadiene rubber, ethylene-propylene-diene rubber, halogenated butyl rubber, halogenated Isoprene rubber, halogenated isobutylene copolymer, chloroprene rubber, butyl rubber and halogenated isobutylene-p-methylstyrene rubber, more preferably natural rubber, butyl rubber, isoprene rubber, styrene butadiene rubber, butadiene rubber and other diene rubbers .
- the weight average molecular weight of the elastomeric polymer is preferably 1,000 to 3,000,000, more preferably 10,000 to 1,000,000.
- the glass transition temperature (Tg) of the elastomeric polymer is preferably 25 ° C. or lower, and more preferably 0 ° C. or lower.
- Tg is a glass transition point measured by differential scanning calorimetry (DSC-Differential Scanning Calorimetry).
- the temperature raising rate is preferably 10 ° C./min.
- examples of the inorganic material include silica, carbon black, calcium carbonate, titanium oxide clay, clay and talc. Among these, since the mechanical properties and heat resistance can be further improved, silica and / or It is preferable to use carbon black.
- the addition amount of the inorganic material is preferably 0.1 to 500 parts by mass, and more preferably 1 to 300 parts by mass with respect to 100 parts by mass of the elastomeric polymer.
- the rubber composition of the present invention preferably contains another silane compound.
- the content of the other silane compound is preferably 0.1 to 10 parts by mass, more preferably 0.3 to 5 parts by mass with respect to 100 parts by mass of the elastomeric polymer.
- silane compounds examples include silane compounds represented by the following general formula (2).
- X is an integer of 2 to 20, preferably an even number of 2 to 8.
- O and o ′ are each independently an integer of 1 to 10, preferably an integer of 1 to 5.
- p and q are each independently an integer of 1 to 3.
- R 11 and R 13 are each independently a hydrolyzable group, and (i) an alkoxy group, more preferably an alkoxy group having 1 to 30 carbon atoms, still more preferably an alkoxy group having 1 to 20 carbon atoms, Or (ii) an amino group substituted with one or more alkyl groups, more preferably an amino group substituted with one or more alkyl groups having 1 to 30 carbon atoms, more preferably one or more alkyl groups having 1 to 20 carbon atoms. An amino group substituted with a group. Specific examples of the alkoxy group and the like are as described above.
- R 12 and R 14 are each independently hydrogen or an alkyl group, more preferably an alkyl group having 1 to 30 carbon atoms, still more preferably an alkyl group having 1 to 20 carbon atoms, specifically, Examples include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, tert-butyl group, pentyl group, cyclopentyl group, hexyl group and cyclohexyl group. Among these, methyl group and ethyl Groups are preferred.
- a commercially available silane compound satisfying the general formula (2) may be used, and examples thereof include Si-69 and Si-75 manufactured by Evonik.
- the rubber composition preferably contains 1 to 15% by mass of the other silane compound represented by the general formula (2) with respect to 100 parts by mass of the total amount of silica contained in the rubber composition. It is preferably 12% by mass, and more preferably 3-10% by mass.
- silane compound represented by the general formula (2) In addition to the silane compound represented by the general formula (2), a silane compound having the following structure can be used.
- the rubber composition is a silica reinforcing agent, a reinforcing agent such as carbon black, a vulcanizing agent such as sulfur and zinc oxide, a cross-linking agent, a vulcanization accelerator, a cross-linking accelerator, and a vulcanization accelerating assistant as long as the effect is not impaired.
- Additives such as agents, anti-aging agents, softeners, various oils, antioxidants, anti-aging agents, fillers and plasticizers may be included.
- the silica reinforcing agent is not particularly limited, and examples thereof include dry method white carbon, wet method white carbon, colloidal silica, and precipitated silica. Among these, wet method white carbon mainly containing hydrous silicic acid is preferable. These silica reinforcing agents can be used alone or in combination of two or more in an amount of 10 to 300 parts by weight.
- the specific surface area of these silicas is not particularly limited, but is usually 10 to 400 m 2 / g, preferably 20 to 300 m 2 / g, more preferably 120 to 190 m 2 / g in terms of nitrogen adsorption specific surface area (BET method). In some cases, improvements in reinforcement, wear resistance, heat generation and the like are sufficiently achieved and suitable.
- the nitrogen adsorption specific surface area is a value measured by the BET method according to ASTM D3037-81.
- Carbon black is appropriately selected and used depending on the application. Generally, carbon black is classified into hard carbon and soft carbon based on the particle diameter. Soft carbon has low reinforcement to rubber, and hard carbon has strong reinforcement to rubber. In the rubber composition of the present invention, it is preferable to use hard carbon having particularly strong reinforcement. It may be contained in an amount of 10 to 250 parts by weight, preferably 20 to 200 parts by weight, more preferably 30 to 50 parts by weight, based on 100 parts by weight of the elastomeric polymer.
- Examples of the anti-aging agent include hindered phenol-based, aliphatic and aromatic hindered amine-based compounds, and 0.1 to 10 parts by weight, more preferably 1 to 10 parts by weight based on 100 parts by weight of the elastomeric polymer. It is preferable to add 5 parts by weight.
- Examples of the antioxidant include butylhydroxytoluene (BHT) and butylhydroxyanisole (BHA). It is preferable to add 0.1 to 10 parts by weight, more preferably 1 to 5 parts by weight with respect to 100 parts by weight of the elastomeric polymer.
- the colorant examples include titanium dioxide, zinc oxide, ultramarine, bengara, lithopone, lead, cadmium, iron, cobalt, aluminum, hydrochloride, sulfate, and other inorganic pigments, azo pigments, copper phthalocyanine pigments, and the like. It is preferable to add 0.1 to 10 parts by weight, more preferably 1 to 5 parts by weight with respect to 100 parts by weight of the elastomeric polymer.
- vulcanizing agents include powdered sulfur, precipitated sulfur, highly dispersible sulfur, surface-treated sulfur, insoluble sulfur, dimorpholine disulfide, alkylphenol disulfide, and other sulfur-based vulcanizing agents, zinc white, magnesium oxide, resurge, p. -Quinonedioxam, p-dibenzoylquinonedioxime, tetrachloro-p-benzoquinone, poly-p-dinitrobenzene, methylenedianiline and the like.
- Vulcanizing aids include fatty acids such as acetyl acid, propionic acid, butanoic acid, stearic acid, acrylic acid, maleic acid, zinc acetylate, zinc propionate, zinc butanoate, zinc stearate, zinc acrylate, maleic acid
- fatty acids such as acetyl acid, propionic acid, butanoic acid, stearic acid, acrylic acid, maleic acid, zinc acetylate, zinc propionate, zinc butanoate, zinc stearate, zinc acrylate, maleic acid
- zinc such as fatty acid zinc and zinc oxide.
- Vulcanization accelerators include thiurams such as tetramethylthiuram disulfide (TMTD) and tetraethylthiuram disulfide (TETD), aldehydes and ammonia such as hexamethylenetetramine, guanidines such as diphenylguanidine, and dibenzothiazyl disulfide (DM). ) And the like, and cyclohexylbenzothiazylsulfenamide type.
- TMTD tetramethylthiuram disulfide
- TETD tetraethylthiuram disulfide
- aldehydes and ammonia such as hexamethylenetetramine
- guanidines such as diphenylguanidine
- DM dibenzothiazyl disulfide
- DM dibenzothiazyl disulfide
- the compounding agent and the additive can be used as a rubber composition by kneading with a known rubber kneader, for example, a roll, a Banbury mixer, a kneader, etc., and vulcanizing under arbitrary conditions.
- a known rubber kneader for example, a roll, a Banbury mixer, a kneader, etc.
- the addition amounts of these compounding agents and additives can be set to conventional general compounding amounts as long as the object of the present invention is not violated.
- a tire can be produced by a conventionally known method using the rubber composition.
- a tire can be produced by extruding the rubber composition and then molding it using a tire molding machine, followed by heating and pressurizing using a vulcanizer.
- Example 1 Degassing the system while putting a stirrer bar in a 300 mL three-necked flask equipped with a Dim funnel, ball stopper, and dropping funnel connected to the synthesis vacuum line of silane compound 1 and heating with a dryer using the vacuum line- Nitrogen replacement was repeated 10 times to obtain a normal pressure nitrogen atmosphere.
- the oil bath was removed from the flask and allowed to stand at room temperature.
- the solvent was depressurizingly distilled and the 37.85g silane compound 1 was obtained (yield 93%).
- the structure of the obtained silane compound 1 was confirmed by 1 H-NMR and 13 C-NMR measurements. As a result, the introduction rate of silane was 100%, and disappearance of the vinyl group was confirmed. It was confirmed that it was obtained.
- the NMR chart is shown in FIG.
- Example 2 A rubber composition and a rubber sheet were produced in the same manner as in Example 1 except that the silane compound 1 was not contained and the content of the other silane compound A was changed to 4.2 parts by mass.
- JIS-A hardness Six rubber sheets obtained in Example 1 were stacked, and JIS-A hardness was measured according to JIS K6353 (issued in 2012). The rubber sheets obtained in Comparative Examples 1 and 2 were measured in the same manner. The measurement results are shown in Table 1.
Abstract
Description
R1およびR2は、それぞれ独立して、水素またはアルキル基を表すが、R1およびR2は-(CH2)e-で表される架橋構造を形成してもよく、
R3およびR4は、それぞれ独立して、水素若しくはアルキル基を表すが、R3およびR4は-(CH2)f-で表される架橋構造を形成してもよく、
R5は、水素またはアルキル基であり、
R6は、アルコキシ基または1以上のアルキル基で置換されたアミノ基であり、
R7は、水素またはアルキル基であり、
aは、0~5の整数であり、
bは、0~5の整数であり、
cは、0~10の整数であり、
dは、0~30の整数であり、
eおよびfは、それぞれ独立して、1~5の整数であり、
nは、1~3の整数であり、
但し、c=0かつd=2の場合、少なくとも1つのR5はアルキル基である。)
Xは、2~20の整数であり、
oおよびo’は、それぞれ独立して1~10の整数であり、
pおよびqは、それぞれ独立して1~3の整数であり、
R11およびR13は、それぞれ独立して、アルコキシ基または1以上のアルキル基で置換されたアミノ基であり、
R12およびR14は、それぞれ独立して、水素またはアルキル基である。)
本発明のシラン化合物は、下記一般式(1)で表される。本発明のシラン化合物は、高い反応性を有し、かつ低極性の反応性官能基と、加水分解性基を有しているため、低極性の高分子材料と混合しても、分散不良や混合不良が生じることがなく、シランカップリング剤やゴム組成物の構成成分として好適に使用することができる。また、接着剤組成物やシーリング剤組成物の構成成分としても好適に使用することができる。
なお、cが2以上である場合、bはそれぞれ独立して選択される。
なお、一般式(1)においてaがc以上である場合、R3およびR4はそれぞれ独立して選択される。また、bが2以上である場合、R4はそれぞれ独立して選択される。
なお、cが1以上であり、かつbが2以上である場合、R4は2以上存在することとなるが、R3と架橋構造を形成することができるのは、任意の一箇所のR4のみであり、その他のR4は、水素またはアルキル基である。
但し、c=0かつd=2の場合、少なくとも1つのR5はアルキル基である。また、一般式(1)においてdが2以上である場合、R5はそれぞれ独立して選択される。
具体的には、アルコキシ基としては、メトキシ基、エトキシ基、プロポキシ基、イソプロポキシ基、ブトキシ基およびイソブトキシ基などが挙げられ、これらの中でも、メトキシ基またはエトキシ基が好ましく、安全性という観点からは、エトキシ基が特に好ましい。また、1以上のアルキル基で置換されたアミノ基としては、N-メチルアミノ基、N,N-ジメチルアミノ基、N-エチルアミノ基、N,N-ジエチルアミノ基およびN-イソプロピルアミノ基などが挙げられ、これらの中でも、N-メチルアミノ基またはN-エチルアミノ基が好ましい。なお、アルコキシ基およびアミノ基は、炭化水素基などの連結基を介してケイ素(Si)と結合してもよい。
一実施形態において、本発明によるシラン化合物は、不飽和基を有する脂環式エポキシ化合物と、トリメトキシシラン、トリエトキシシランなどのシラン化合物とを、ヒドロシリル化触媒の存在下において、ヒドロシリル化反応させることにより得ることができる。
ヒドロシリル化触媒は、一方の原料化合物中の脂肪族不飽和基(アルケニル基、ジエン基等)と他方の原料化合物中のケイ素原子結合水素原子(即ち、SiH基)とを付加反応させる触媒である。ヒドロシリル化触媒としては、例えば、白金族の金属単体やその化合物などの白金族金属系触媒が挙げられる。白金族金属系触媒としては従来公知のものが使用でき、その具体例としては、シリカ、アルミナ又はシリカゲルのような担体上に吸着させた微粒子状白金金属、塩化第二白金、塩化白金酸、塩化白金酸6水塩のアルコール溶液、パラジウム触媒、ロジウム触媒等が挙げられる。たとえば、Speier触媒(H2PtCl6・H2O)、Karstedt触媒(Pt2{[(CH2=CH)Me2Si]2O}3、RhCl(PPh3)3やRhH(PPh3)4などのRh触媒などの公知の触媒が挙げられるが、白金族金属として白金を含むものが好ましい。ヒドロシリル化触媒は一種単独で使用しても二種以上を組み合わせて使用してもよい。
本発明のシラン化合物は、低極性でありながら、高い活性を示す反応性官能基を有しているため、極性基等を有していない高分子材料と組み合わせて用いた場合であっても、優れた親和性(分散性)を有しながら、該高分子材料との反応性も維持できるため、シランカップリング剤の構成成分として好適に用いることができる。
本発明のシラン化合物は、ゴム組成物の構成成分として、好適に用いることができる。ゴム組成物が本発明のシラン化合物を含んでなることにより、ゴム組成物の硬度、引張特性および粘弾性特性を向上させることができる。
エラストマー性ポリマーは、一般的に公知の天然高分子または合成高分子であって、そのガラス転移点が室温(25℃)以下のポリマー、すなわちエラストマーであれば特に限定されず、液状または固体状であってもよい。
上記一般式(2)を満たすシラン化合物として、市販されているものを使用してもよく、例えば、エボニック社製のSi-69やSi-75などが挙げられる。
上記ゴム組成物を用いて、従来公知の方法によりタイヤを作製することができる。例えば、上記ゴム組成物を押し出し、次いで、タイヤ成型機を用いて成形した後、加硫機を用いて加熱・加圧することにより、タイヤを作製することができる。
シラン化合物1の合成
真空ラインを繋げたジムロート、玉栓、滴下ロートを付けた300mLの3口フラスコに、スターラーバーを入れ、真空ラインを用いて、ドライヤーで加熱しながら、系内の脱気-窒素置換を10回繰り返し、常圧窒素雰囲気下とした。
次に塩化白金酸0.486mmol/gイソプロパノール溶液を0.171g(0.0831mmol)を注入した後、下記式(3)で表される2-エテニル-1,2,3,4,4a,5,8,8a-オクタヒドロ-1,4-メタノナフタレン(VNBB)のエポキシ化物21.84g(0.1148mol)を入れた。
以下の各成分を100mLニーダー(東洋精機社製ラボプラストミル)を用いて混練し、ゴム組成物を得た。このゴム組成物について160℃、15分間のプレス加硫を行いゴム組成物からなる厚さ1mmのゴムシートを作製した。
・天然ゴム(RSS♯3) 100質量部
・シラン化合物1 1質量部
・その他のシラン化合物A(エボニック社製、商品名:Si-69)
3.2質量部
・シリカAQ(東ソー社製、商品名:ニップシールAQ) 40質量部
・酸化亜鉛3号(東邦亜鉛社製、商品名:銀嶺R) 3質量部
・ステアリン酸(新日本理化社製、商品名:ステアリン酸300)1質量部
・老化防止剤(大内新興化学社製、商品名:ノクラック224) 2質量部
・硫黄(細井化学社製、油処理硫黄) 2質量部
・加硫促進剤(大内新興化学社製、商品名:ノクセラーCZ) 1質量部
・加硫促進剤(大内新興化学社製、商品名:ノクセラーD) 0.5質量部
シラン化合物1を含有させなかった以外は実施例1と同様にしてゴム組成物およびゴムシートを作製した。
シラン化合物1を含有させず、その他のシラン化合物Aの含有量を4.2質量部へ変更した以外は実施例1と同様にしてゴム組成物およびゴムシートを作製した。
上記実施例および比較例で得られたおよびゴムシートの物性を下記の方法により評価した。
実施例1で得られたゴムシートを6枚重ね、JIS K6353(2012年発行)に準拠して、JIS-A硬度を測定した。比較例1および2において得られたゴムシートについても同様にして測定した。測定結果を表1に表す。
実施例1で得られたゴムシートから3号ダンベル状の試験片を打ち抜き、引張速度500mm/分での引張試験をJIS K6251(2010年発行)に準拠して行い、100%モジュラス(100%Mod)[MPa]、300%モジュラス(300%Mod)[MPa]、破断強度(TB)[MPa]、および、破断伸び(EB)[%]を室温(25℃)にて測定した。比較例1および2において得られたゴムシートについても同様にして測定した。測定結果を表1に表す。なお、破断伸び(EB)が400%以上であれば良好な引張特性を示すことができる。
粘弾性測定装置(UBM社製REOGEL E-4000)を用い、JIS K 6394に準拠して、歪20μm、約0.1%、周波数10Hzの条件下において、実施例1で得られたゴムシートの、測定温度0℃および60℃におけるtanδを求め、この値からtanδバランス(=tanδ(0℃)/tanδ(60℃))を算出した。比較例1および2において得られたゴムシートについても同様にして測定した。測定結果を表1に表す。なお、tanδバランスが高いほど、粘弾性特性が高いことを示す。
Claims (7)
- 下記一般式(1)で表される、シラン化合物。
R1およびR2は、それぞれ独立して、水素若しくはアルキル基を表すが、R1およびR2は-(CH2)e-で表される架橋構造を形成してもよく、
R3およびR4は、それぞれ独立して、水素若しくはアルキル基を表すが、R3およびR4は-(CH2)f-で表される架橋構造を形成してもよく、
R5は、水素またはアルキル基であり、
R6は、アルコキシ基または1以上のアルキル基で置換されたアミノ基であり、
R7は、水素またはアルキル基であり、
aは、0~5の整数であり、
bは、0~5の整数であり、
cは、0~10の整数であり、
dは、0~30の整数であり、
eおよびfは、それぞれ独立して、1~5の整数であり、
nは、1~3の整数であり、
但し、c=0かつd=2の場合、少なくとも1つのR5はアルキル基である。) - 前記bが、0~3の整数である、請求項1に記載のシラン化合物。
- 前記cが、1~5の整数である、請求項1または2に記載のシラン化合物。
- 請求項1~3のいずれか一項に記載のシラン化合物、エラストマー性ポリマーおよび無機材料を含んでなる、ゴム組成物。
- 前記ゴム組成物における請求項1~3のいずれか一項に記載のシラン化合物の含有量が、前記エラストマー性ポリマー100質量部に対し、0.1~30質量部である、請求項4または5に記載のゴム組成物。
- 請求項4~6のいずれか一項に記載のゴム組成物を含んでなる、タイヤ。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3431470B1 (en) * | 2016-03-14 | 2021-01-06 | JXTG Nippon Oil & Energy Corporation | Epoxy compound, curable composition, cured product, method for producing epoxy compound, and reactive diluent |
CN111801151A (zh) * | 2018-11-07 | 2020-10-20 | 川崎重工业株式会社 | 酸性气体吸收材料及其制造方法 |
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JP2017165659A (ja) | 2017-09-21 |
CN109071573B (zh) | 2021-06-25 |
EP3444256A1 (en) | 2019-02-20 |
KR102332756B1 (ko) | 2021-11-29 |
JP6625453B2 (ja) | 2019-12-25 |
US20190085003A1 (en) | 2019-03-21 |
CN109071573A (zh) | 2018-12-21 |
EP3444256B1 (en) | 2022-05-04 |
EP3444256A4 (en) | 2019-09-18 |
KR20180126463A (ko) | 2018-11-27 |
US10899778B2 (en) | 2021-01-26 |
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