WO2023037998A1 - ゴム組成物 - Google Patents

ゴム組成物 Download PDF

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Publication number
WO2023037998A1
WO2023037998A1 PCT/JP2022/033245 JP2022033245W WO2023037998A1 WO 2023037998 A1 WO2023037998 A1 WO 2023037998A1 JP 2022033245 W JP2022033245 W JP 2022033245W WO 2023037998 A1 WO2023037998 A1 WO 2023037998A1
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Prior art keywords
rubber
mass
diene rubber
modified diene
specific
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English (en)
French (fr)
Japanese (ja)
Inventor
智行 酒井
隆裕 岡松
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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Priority to JP2023507507A priority Critical patent/JPWO2023037998A1/ja
Publication of WO2023037998A1 publication Critical patent/WO2023037998A1/ja
Anticipated expiration legal-status Critical
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
    • C08C19/00—Chemical modification of rubber
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

Definitions

  • the present invention relates to rubber compositions.
  • fillers such as silica and carbon black (hereinafter collectively referred to as "fillers”) have low affinity with rubber components, and the cohesiveness between fillers is high, so simply adding fillers to rubber components There are problems that the filler does not disperse even when blended, the effect of reducing heat build-up cannot be obtained sufficiently, and the effect of improving toughness and wear resistance cannot be obtained sufficiently.
  • filler dispersibility the filler dispersibility
  • an object of the present invention is to provide a rubber composition having excellent filler dispersibility.
  • the present inventors have found that the above problems can be solved by using a diene rubber modified at a specific ratio with a complex of a nitrogen-containing aromatic compound and a boron compound having a B—H bond.
  • a diene rubber modified at a specific ratio with a complex of a nitrogen-containing aromatic compound and a boron compound having a B—H bond We found that the problem can be solved, and arrived at the present invention. That is, the inventors have found that the above problems can be solved by the following configuration.
  • the modified diene-based rubber is a diene-based rubber modified with a complex of a nitrogen-containing aromatic compound and a boron compound having a B—H bond, and A rubber composition in which the proportion is 0.01 to 2 mol %.
  • the nitrogen-containing aromatic compound is at least one selected from the group consisting of pyridine, quinoxaline, pyrrole and aromatic amines.
  • a rubber composition having excellent filler dispersibility can be provided.
  • FIG. 1 shows infrared absorption spectra of specific modified diene rubber 2, isoprene rubber and pyridine borane.
  • the rubber composition of the present invention is described below.
  • the numerical range represented by "-" means a range including the numerical values before and after "-" as lower and upper limits.
  • each component may be used individually by 1 type, or may use 2 or more types together.
  • the content of that component refers to the total content unless otherwise specified.
  • it has excellent filler dispersibility, excellent workability, low heat build-up, abrasion resistance, and toughness (e.g., tensile elongation at break), and is excellent in WET performance and fuel efficiency when made into a tire.
  • the effects of the present invention are excellent.”
  • the rubber composition of the present invention (hereinafter also referred to as "the composition of the present invention") is A rubber composition containing a rubber component containing 10% by mass or more of a modified diene rubber and at least one filler selected from the group consisting of silica and carbon black,
  • the modified diene-based rubber is a diene-based rubber modified with a complex of a nitrogen-containing aromatic compound and a boron compound having a B—H bond, and A rubber composition in which the proportion is 0.01 to 2 mol %.
  • the composition of the present invention is a diene rubber modified with a complex of a nitrogen-containing aromatic compound and a boron compound having a B—H bond (hereinafter also referred to as a “specific complex”), It contains a modified diene rubber (hereinafter also referred to as "specific modified diene rubber”) in which the ratio of the complex to the diene-derived repeating unit of the diene rubber is 0.01 to 2 mol %. It is believed that the nitrogen-containing aromatic compound portion of the specific modified diene rubber strongly interacts with the filler, thereby remarkably improving the filler dispersibility.
  • pyridine-borane-modified diene-based rubbers interact with fillers (silica) more. It can also be inferred from the fact that it is large.
  • Rubber component contained in the composition of the present invention contains 10% by mass or more of the specific modified diene rubber.
  • the rubber component may contain a rubber component other than the specific modified diene rubber.
  • the specific modified diene rubber is a diene rubber modified with a complex (specific complex) of a nitrogen-containing aromatic compound and a boron compound having a BH bond, and is a repeating unit derived from the diene of the diene rubber.
  • a modified diene rubber in which the ratio of the complex is 0.01 to 2 mol %.
  • the specific modified diene rubber has a structure in which the B—H bond of the specific complex is bonded to the double bond of the diene rubber by an addition reaction.
  • the specific complex is pyridine borane, it bonds to the double bond of the diene rubber as follows.
  • the diene rubber before modification is not particularly limited, and specific examples thereof include natural rubber (NR), butadiene rubber (BR), aromatic vinyl-conjugated diene copolymer rubber, isoprene rubber (IR), acrylonitrile- butadiene copolymer rubber (NBR), butyl rubber (IIR), halogenated butyl rubber (Br-IIR, Cl-IIR), chloroprene rubber (CR) and the like.
  • the aromatic vinyl-conjugated diene copolymer rubber include styrene-butadiene rubber (SBR) and styrene-isoprene copolymer rubber.
  • the diene rubber is preferably natural rubber or isoprene rubber because the effects of the present invention are more excellent.
  • a specific complex is a complex of a nitrogen-containing aromatic compound and a boron compound having a B—H bond.
  • the nitrogen-containing aromatic compound that constitutes the specific complex is not particularly limited as long as it is an aromatic compound having a nitrogen atom.
  • the nitrogen atom may be contained in the aromatic ring of the aromatic compound or may be contained in the substituent of the aromatic ring of the aromatic compound. It is preferably contained in an aromatic ring of a family compound.
  • examples of embodiments in which the nitrogen atom is contained in the aromatic ring of the aromatic compound include pyridine, quinoxaline, pyrrole, pyrazine, pyrimidine, pyridazine, thiazole, oxazole, imidazole, pyrazole, and isoxazole. , isothiazole, triazole, furazane, oxadithiazole, thiadiazole, dioxazole, dithiazole and the like. These may have a substituent (for example, a substituent Z described later).
  • examples of embodiments in which a nitrogen atom is included in the substituent of the aromatic ring of the aromatic compound include aromatic amines (aromatic compounds containing amino groups (—NR 2 , where R is a hydrogen atom or a compound substituted with a substituent (eg, a substituent Z) described later) (eg, aniline), and the like.
  • aromatic amines aromatic compounds containing amino groups (—NR 2 , where R is a hydrogen atom or a compound substituted with a substituent (eg, a substituent Z) described later) (eg, aniline), and the like.
  • the nitrogen-containing aromatic compound is preferably at least one selected from the group consisting of pyridine, quinoxaline, pyrrole and aromatic amines, and more preferably pyridine, for the reason that the effects of the present invention are more excellent. preferable.
  • the above nitrogen-containing aromatic compound preferably has an aliphatic hydrocarbon group (especially an alkyl group having 1 to 10 carbon atoms) as a substituent for the reason that the effects of the present invention are more excellent.
  • the boron compound that constitutes the specific complex is not particularly limited as long as it is a compound having at least one BH bond.
  • Specific examples of the boron compound include borane (BH 3 ), alkylborane, dialkylborane, arylborane, diarylborane, and alkylarylborane. Among them, borane is preferable because the effects of the present invention are more excellent.
  • Substituent Z examples include halogen atoms, aliphatic hydrocarbon groups, aromatic hydrocarbon groups, silyl groups, alkoxy groups, aryloxy groups, acyl groups, hydroxy groups, mercapto groups, and sulfo groups.
  • Specific examples of the specific complex include pyridine borane, picoline borane, pyrrole borane, aniline borane and the like. Among them, pyridine borane and picoline borane are preferable because the effects of the present invention are more excellent.
  • the ratio of the specific complex used for modification (hereinafter also referred to as “proportion A”) to the repeating unit derived from the diene of the diene rubber (before modification) is 0.5. 01 to 2 mol %.
  • the ratio A is preferably 0.1 to 1 mol % for the reason that the effects of the present invention are more excellent.
  • the specific modified diene rubber can be produced by modifying the diene rubber (the diene rubber before modification) with the specific complex described above. Specifically, for example, a method of mixing a diene-based rubber and a specific complex under high temperature conditions (for example, 70° C. or higher) can be used.
  • the amount of the specific complex mixed with 100 parts by mass of the diene rubber (the diene rubber before modification) is preferably 0.01 to 5 parts by mass, and 0.1 to It is more preferably 3 parts by mass, and even more preferably 0.2 to 2 parts by mass.
  • the content of the specific modified diene rubber in the rubber component is 10% by mass or more.
  • the content is preferably 30% by mass or more, more preferably 50% by mass or more, further preferably 70% by mass or more, and 90% by mass or more because the effects of the present invention are more excellent. is particularly preferred.
  • the upper limit of the content of the specific modified diene rubber in the rubber component is not particularly limited, and is 100% by mass.
  • the rubber component may contain rubber components other than the specific modified diene rubber (other rubber components). Specific examples of such a rubber component are the same as those of the diene-based rubber before modification of the specific modified diene-based rubber described above.
  • the weight average molecular weight (Mw) of the rubber component is not particularly limited, but is preferably 100,000 or more because the effects of the present invention are more excellent. 000 to 10,000,000, more preferably 250,000 to 2,000,000, particularly preferably 1,000,000 or less, and 500,000 or less is most preferred.
  • the weight average molecular weight (Mn) of the rubber component is not particularly limited, but it should be 100,000 to 5,000,000 because the effects of the present invention are more excellent. is preferred, and 120,000 to 1,000,000 is more preferred.
  • the weight average molecular weight (Mw) and number average molecular weight (Mn) are standard polystyrene conversion values obtained by gel permeation chromatography (GPC) measurement under the following conditions.
  • GPC gel permeation chromatography
  • composition of the present invention contains at least one filler selected from the group consisting of silica and carbon black.
  • the composition of the present invention preferably contains silica as a filler because the effects of the present invention are more excellent.
  • the silica is not particularly limited, and any conventionally known silica can be used. Examples of the silica include wet silica, dry silica, fumed silica, and diatomaceous earth. As for the silica, one type of silica may be used alone, or two or more types of silica may be used in combination.
  • CTAB adsorption specific surface area of the silica (hereinafter, "CTAB adsorption specific surface area” is also simply referred to as “CTAB”) is not particularly limited, but for the reason that the effects of the present invention are more excellent, 100 to 300 m 2 /g, more preferably 150 to 200 m 2 /g.
  • CTAB adsorption specific surface area is a value obtained by measuring the amount of CTAB adsorption to the silica surface according to JIS K6217-3:2001 "Part 3: Determination of specific surface area - CTAB adsorption method".
  • the content of silica is not particularly limited, but since the effects of the present invention are more excellent, 10 parts per 100 parts by mass of the above-described rubber component (especially the above-described specific modified diene rubber) It is preferably up to 150 parts by mass, more preferably 20 to 100 parts by mass.
  • the composition of the present invention preferably contains carbon black as a filler because the effects of the present invention are more excellent.
  • carbon black one type of carbon black may be used alone, or two or more types of carbon black may be used in combination.
  • the carbon black is not particularly limited, for example, various grades such as SAF-HS, SAF, ISAF-HS, ISAF, ISAF-LS, IISAF-HS, HAF-HS, HAF, HAF-LS, FEF, GPF, and SRF can be used.
  • the content of carbon black is not particularly limited. It is preferably 10 to 150 parts by mass, more preferably 20 to 100 parts by mass.
  • the content of the filler is not particularly limited, but since the effects of the present invention are more excellent, , preferably 10 to 150 parts by mass, more preferably 20 to 100 parts by mass.
  • the filler content means the total content.
  • composition of the present invention preferably contains a silane coupling agent for the reason that the effects of the present invention are more excellent.
  • the composition of the present invention preferably contains a silane coupling agent because the effects of the present invention are more excellent.
  • the silane coupling agent is not particularly limited as long as it is a silane compound having a hydrolyzable group and an organic functional group.
  • the hydrolyzable group is not particularly limited, examples thereof include alkoxy groups, phenoxy groups, carboxyl groups, and alkenyloxy groups. Among them, an alkoxy group is preferable because the effects of the present invention are more excellent.
  • the hydrolyzable group is an alkoxy group
  • the number of carbon atoms in the alkoxy group is preferably 1 to 16, more preferably 1 to 4, for the reason that the effects of the present invention are more excellent.
  • alkoxy groups having 1 to 4 carbon atoms include methoxy, ethoxy and propoxy groups.
  • the organic functional group is not particularly limited, but is preferably a group capable of forming a chemical bond with an organic compound.
  • mercapto group protected mercapto group
  • sulfide group especially disulfide group, tetrasulfide group
  • mercapto group block mercapto groups
  • Silane coupling agents may be used alone or in combination of two or more.
  • the silane coupling agent is preferably a sulfur-containing silane coupling agent because the effects of the present invention are more excellent.
  • silane coupling agent examples include bis(3-triethoxysilylpropyl)tetrasulfide, bis(3-trimethoxysilylpropyl)tetrasulfide, bis(3-triethoxysilylpropyl)disulfide, mercaptopropyltrimethoxy Silane, mercaptopropyltriethoxysilane, 3-trimethoxysilylpropyl-N,N-dimethylthiocarbamoyl-tetrasulfide, trimethoxysilylpropyl-mercaptobenzothiazole tetrasulfide, triethoxysilylpropyl-methacrylate-monosulfide, dimethoxymethylsilyl Propyl-N,N-dimethylthiocarbamoyl-tetrasulfide, 3-octanoylthio-1-propyltriethoxysilane and the like,
  • the content of the silane coupling agent is not particularly limited, but since the effects of the present invention are more excellent, it is 1 to 20 parts by mass with respect to 100 parts by mass of the rubber component described above. is preferred, and 2 to 10 parts by mass is more preferred.
  • the content of the silane coupling agent is preferably 1 to 20% by mass with respect to the content of silica described above, for the reason that the effects of the present invention are more excellent. More preferably, it is up to 15% by mass.
  • composition of the present invention can contain components other than the components described above (other components), if necessary.
  • components include fillers other than carbon black and silica, terpene resins (preferably aromatic modified terpene resins), thermally expandable microcapsules, zinc oxide (zinc white), stearic acid, anti-aging agents. , waxes, processing aids, processing oils, liquid polymers, thermosetting resins, vulcanizing agents (e.g. sulfur), vulcanization accelerators, vulcanization activators, and various additives commonly used in rubber compositions. agents and the like.
  • Method for preparing a rubber composition The method for producing the composition of the present invention is not particularly limited. a method of kneading using a roll, etc.).
  • the composition of the present invention contains sulfur or a vulcanization accelerator
  • the components other than sulfur and the vulcanization accelerator are first mixed at a high temperature (preferably 100 to 155 ° C.), cooled, and then sulfur or It is preferred to mix a vulcanization accelerator.
  • the composition of the present invention can be vulcanized or crosslinked under conventionally known vulcanization or crosslinking conditions.
  • composition of the present invention is suitably used as a rubber material.
  • it is suitably used for tires (especially pneumatic tires), conveyor belts, hoses, anti-vibration materials, rubber rolls, outer hoods of railway vehicles, and the like.
  • tires especially pneumatic tires
  • conveyor belts especially hoses
  • anti-vibration materials especially rubber rolls
  • rubber rolls especially outer hoods of railway vehicles, and the like.
  • it is preferably used for tires (particularly treads).
  • pyridine borane is a complex of pyridine, which corresponds to a nitrogen-containing aromatic compound, and borane (BH 3 ), which corresponds to a boron compound having a B—H bond, and thus corresponds to the specific complex described above.
  • the specific modified diene rubbers 1 and 2 which are isoprene rubbers modified with pyridine borane and in which the above-mentioned ratio A is in the range of 0.01 to 2 mol%
  • the natural rubber modified with pyridine borane The specific modified diene rubbers 3 and 4 in which the ratio A is in the range of 0.01 to 2 mol % correspond to the specific modified diene rubbers described above.
  • picoline borane is a complex of picoline, which corresponds to a nitrogen-containing aromatic compound, and borane (BH 3 ), which corresponds to a boron compound having a B—H bond, and thus corresponds to the specific complex described above.
  • the specific modified diene rubbers 5 to 7, which are natural rubbers modified with picoline borane and in which the ratio A is in the range of 0.01 to 2 mol%, correspond to the specific modified diene rubbers described above.
  • tetrahydrofuran borane is a complex of tetrahydrofuran, which does not correspond to nitrogen-containing aromatic compounds, and borane (BH 3 ), which corresponds to a boron compound having a B—H bond, and therefore does not correspond to the specific complexes described above. Therefore, the comparative modified diene rubber, which is isoprene rubber modified with tetrahydrofuran borane, does not correspond to the specific modified diene rubber described above.
  • Specific modified diene rubber 1 100 parts by mass of isoprene rubber (Nipol IR2200 manufactured by Nippon Zeon Co., Ltd.) (Mw: 120000) and 0.5 parts by mass of pyridine borane (structure below) were mixed for 5 minutes in a mixer manufactured by Brabender set at 90 ° C. to obtain pyridine. Borane-modified isoprene rubber was synthesized. The obtained rubber is also referred to as specific modified diene rubber 1. The ratio A described above for the specific modified diene rubber 1 is 0.4 mol %.
  • Specific modified diene rubber 2 An isoprene rubber modified with pyridine borane was synthesized according to the same procedure as the specific modified diene rubber 1 described above, except that the amount of pyridine borane was changed to 1.0 parts by mass. The obtained rubber is also referred to as specific modified diene rubber 2. The ratio A described above for the specific modified diene rubber 2 is 0.7 mol %.
  • Specific modified diene rubber 3 Modified with pyridine borane according to the same procedure as the specific modified diene rubber 1 described above, except that 100 parts by mass of isoprene rubber was changed to 100 parts by mass of natural rubber and the amount of pyridine borane was changed to 0.3 parts by mass. synthesized natural rubber. The obtained rubber is also called a specific modified diene rubber 3.
  • the ratio A described above for the specific modified diene rubber 3 is 0.2 mol %.
  • Specific modified diene rubber 4 Modified with pyridine borane according to the same procedure as the specific modified diene rubber 1 described above, except that 100 parts by mass of isoprene rubber was changed to 100 parts by mass of natural rubber and the amount of pyridine borane was changed to 0.5 parts by mass. synthesized natural rubber. The obtained rubber is also referred to as specific modified diene rubber 4 .
  • the ratio A described above for the specific modified diene rubber 4 is 0.4 mol %.
  • Specific modified diene rubber 5 Same as the specific modified diene rubber 1 described above, except that 100 parts by mass of isoprene rubber is changed to 100 parts by mass of natural rubber, and 0.5 parts by mass of pyridine borane is changed to 0.3 parts by mass of picoline borane (structure below). A natural rubber modified with picoline borane was synthesized according to the procedure of . The obtained rubber is also referred to as specific modified diene rubber 5 . The ratio A described above for the specific modified diene rubber 5 is 0.2 mol %.
  • Specific modified diene rubber 6 An isoprene rubber modified with picoline borane was synthesized according to the same procedure as for the specific modified diene rubber 5 described above, except that the amount of picoline borane was changed to 0.4 parts by mass. The obtained rubber is also referred to as specific modified diene rubber 6 .
  • the ratio A described above for the specific modified diene rubber 6 is 0.3 mol % (0.25 mol %).
  • Specific modified diene rubber 7 An isoprene rubber modified with picoline borane was synthesized according to the same procedure as for the specific modified diene rubber 5 described above, except that the amount of picoline borane was changed to 0.5 parts by mass. The obtained rubber is also referred to as specific modified diene rubber 7 .
  • the ratio A described above for the specific modified diene rubber 7 is 0.3 mol % (0.32 mol %).
  • FIG. 1 An infrared absorption spectrum (ATR) was measured for the specific modified diene rubber 2 described above.
  • An infrared absorption spectrum is shown in FIG. FIG. 1 also shows infrared absorption spectra of polyisoprene (isoprene rubber) and pyridine borane.
  • FIG. 1 in the infrared absorption spectrum of IR-pyridine borane (specific modified diene rubber 2), vibrations not seen in ordinary polyisoprene (isoprene rubber) were confirmed. Vibration of the pyridine ring near 1540 cm ⁇ 1 and stretching vibration derived from the B—H bond near 2370 cm ⁇ 1 were confirmed (absorption different from pyridine borane, the starting material).
  • Table 1 shows the amount of bound rubber.
  • a higher amount of bound rubber means a higher amount of the rubber component interacting with the filler.
  • Amount of bound rubber [(mass of sample after immersion in toluene and drying) - (mass of filler)] / (mass of rubber component)
  • ⁇ Relaxation time T2> The relaxation time T2 of rubber molecules in the resulting gel was measured by pulse NMR (nuclear magnetic resonance).
  • the rubber composition was injected into an NMR tube with a diameter of 9 mm, and a pulse NMR spectrometer MU-25 (manufactured by JEOL Ltd.) was used to measure the spin-spin relaxation time ( T2) was obtained.
  • T2 the spin-spin relaxation time
  • Examples 1 and 2 containing the specific modified diene rubber exhibited excellent filler (silica) dispersibility compared to Comparative Example 1 containing no specific modified diene rubber. .
  • Examples 3 to 8 containing the specific modified diene rubber have excellent filler (silica) dispersibility. showed that. From the comparison of Examples 3 and 4 (comparison of the aspects in which only the ratio A of the specific modified diene rubber is different), Example 4 in which the ratio A of the specific modified diene rubber is 0.3 mol% or more is superior. showed good filler (silica) dispersibility. In addition, from the comparison between Example 3 and Example 5 (comparison between the embodiments in which only the mass part of the specific modified diene rubber is different), the content of the specific modified diene rubber in the rubber component is 60% by mass or more.
  • Example 3 showed better filler (silica) dispersibility. Further, from the comparison between Example 3 and Example 6 (comparison between aspects in which only the specific complex of the specific modified diene rubber is different), the nitrogen-containing aromatic compound of the specific complex has an aliphatic hydrocarbon group as a substituent. Example 6 showed better filler (silica) dispersibility and elongation to break.
  • Example 10 Compared to Comparative Example 3, which does not contain the specific modified diene rubber, Examples 9 to 10 containing the specific modified diene rubber have excellent filler (carbon black) dispersion. showed sex. Among them, Example 10, in which the ratio A of the specific modified diene rubber was 0.3 mol % or more, exhibited superior filler (carbon black) dispersibility.
  • the interaction energies between the silica model and various rubber models were determined by quantum chemical calculations.
  • the interaction energy is the difference between the energy when the silica model and the rubber model exist together minus the energy when they exist independently, and the smaller the value, the greater the interaction between the two models. means big.
  • Quantum chemical calculations were performed using Gaussian (calculation method: MP2, basis functions: 6-31G(d, p)). A stable configuration of the two models was determined by geometry optimization, and the interaction energy between the two models was estimated in the mode of the Counterpoise (compensation) method. Table 4 shows the results.

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PCT/JP2022/033245 2021-09-13 2022-09-05 ゴム組成物 Ceased WO2023037998A1 (ja)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023166784A (ja) * 2022-05-10 2023-11-22 横浜ゴム株式会社 ゴム組成物

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128212A (en) * 1958-07-18 1964-04-07 Olin Mathieson Solid high energy borane fuel composition
JPH06340783A (ja) * 1993-03-15 1994-12-13 Kuraray Co Ltd 樹脂組成物
JP2014074134A (ja) * 2012-10-05 2014-04-24 Yokohama Rubber Co Ltd:The ゴム組成物及びこれを用いる空気入りタイヤ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128212A (en) * 1958-07-18 1964-04-07 Olin Mathieson Solid high energy borane fuel composition
JPH06340783A (ja) * 1993-03-15 1994-12-13 Kuraray Co Ltd 樹脂組成物
JP2014074134A (ja) * 2012-10-05 2014-04-24 Yokohama Rubber Co Ltd:The ゴム組成物及びこれを用いる空気入りタイヤ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023166784A (ja) * 2022-05-10 2023-11-22 横浜ゴム株式会社 ゴム組成物

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