WO2022202698A1 - Composition de caoutchouc pour pneumatique, et pneumatique - Google Patents

Composition de caoutchouc pour pneumatique, et pneumatique Download PDF

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Publication number
WO2022202698A1
WO2022202698A1 PCT/JP2022/012779 JP2022012779W WO2022202698A1 WO 2022202698 A1 WO2022202698 A1 WO 2022202698A1 JP 2022012779 W JP2022012779 W JP 2022012779W WO 2022202698 A1 WO2022202698 A1 WO 2022202698A1
Authority
WO
WIPO (PCT)
Prior art keywords
carbon black
mass
recycled
parts
tire
Prior art date
Application number
PCT/JP2022/012779
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English (en)
Japanese (ja)
Inventor
智洋 柏野
学 加藤
Original Assignee
横浜ゴム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 横浜ゴム株式会社 filed Critical 横浜ゴム株式会社
Publication of WO2022202698A1 publication Critical patent/WO2022202698A1/fr

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Classifications

    • 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
    • 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
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L7/00—Compositions of natural rubber
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons

Definitions

  • the present invention relates to a rubber composition for a tire and a tire, and more particularly, for a tire capable of maintaining breaking strength and achieving low heat build-up even when part of the total amount of carbon black is replaced with recycled carbon black.
  • the present invention relates to rubber compositions and tires using the same.
  • recycled carbon black (recycled CB. It is also sometimes called pyrolytic carbon black or recycled carbon black) obtained by pyrolyzing used rubber products such as waste tires is being studied (for example, the following patent Reference 1).
  • recycled carbon black contains impurities derived from reinforcing materials, tire cords, etc., which are raw materials of tires, there is a problem that the strength and heat build-up properties of tires are greatly reduced.
  • an object of the present invention is to provide a rubber composition for a tire and a tire using the same, which can achieve low heat build-up while maintaining breaking strength even when part of the total amount of carbon black is replaced with recycled carbon black. to do.
  • the inventors of the present invention have found that in a rubber composition for tires containing at least a diene rubber, carbon black and recycled carbon black, the nitrogen adsorption specific surface area N 2 SA and DBP oil absorption of carbon black and recycled carbon black is set within a specific range and the content of the recycled carbon black is set within an appropriate range.
  • the present invention provides a rubber composition for tires containing at least a diene rubber, carbon black and recycled carbon black
  • the carbon black has a nitrogen adsorption specific surface area N 2 SA of 30 to 90 m 2 /g and a DBP oil absorption of 70 to 140 ml/100 g
  • the regenerated carbon black has a nitrogen adsorption specific surface area N 2 SA of 65 to 95 m 2 /g and a DBP oil absorption of 75 to 105 ml/100 g
  • the total carbon black amount of the carbon black and the recycled carbon black (excluding the ash contained in the recycled carbon black) is 30 to 130 parts by mass with respect to 100 parts by mass of the diene rubber
  • a rubber composition for a tire is provided, wherein the ratio of the recycled carbon black (excluding ash contained in the recycled carbon black) in the total amount of carbon black is 3 to 30% by mass. be.
  • the rubber composition for tires of the present invention is a rubber composition for tires containing at least a diene rubber, carbon black and recycled carbon black, wherein the nitrogen adsorption specific surface area N 2 SA and DBP oil absorption of carbon black and recycled carbon black are specified. and the blending amount of recycled carbon black is set within an appropriate range, so even if part of the total amount of carbon black is replaced with recycled carbon black, low heat build-up is achieved while maintaining breaking strength. It is possible to provide a rubber composition for tires that can be used and a tire using the same.
  • the diene rubber used in the present invention is not particularly limited, but for example natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene-butadiene copolymer rubber (SBR), acrylonitrile-butadiene copolymer polymer rubber (NBR), ethylene-propylene-diene terpolymer (EPDM), and the like. These may be used alone or in combination of two or more. Further, its molecular weight and microstructure are not particularly limited, and it may be terminally modified with an amine, amide, silyl, alkoxysilyl, carboxyl, hydroxyl group or the like, or epoxidized. From the viewpoint of improving the effects of the present invention, the amount of NR compounded is 30 parts by mass or more, preferably 30 to 50 parts by mass, when the entire diene rubber used in the present invention is 100 parts by mass. should be
  • the carbon black (CB) used in the present invention has a nitrogen adsorption specific surface area N 2 SA of 30-90 m 2 /g and a DBP oil absorption of 70-140 ml/100 g.
  • N 2 SA of the CB is less than 30 m 2 /g, the breaking strength is lowered, and when it exceeds 90 m 2 /g, low heat build-up cannot be obtained.
  • DBP oil absorption of CB is less than 70 ml/100 g, the breaking strength is lowered, and when it exceeds 140 ml/100 g, the low heat build-up deteriorates.
  • the N 2 SA of CB is preferably 30-70 m 2 /g, and the DBP oil absorption is preferably 80-120 ml/100 g.
  • Recycled carbon black (recycled carbon black) used in the present invention can be, for example, recycled CB produced through thermal decomposition of waste tires.
  • Recycled CB is sometimes called pyrolytic carbon black or recycled carbon black.
  • Pyrolysis of waste tires can be carried out according to known methods. For example, a pyrolysis method at a temperature of 650° C. or higher can be mentioned.
  • the regenerated CB used in the present invention has a nitrogen adsorption specific surface area N 2 SA of 65-95 m 2 /g and a DBP oil absorption of 75-105 ml/100 g. If the N 2 SA and DBP oil absorption of the recycled CB are outside the above ranges, the effect of the present invention cannot be obtained.
  • regenerated CB can be used in the present invention.
  • product name rCB660 ANHUI GREAT product name G685, Shandong Kaiyuan product name rCB, LDC product name GCB-774G, and the like.
  • the PB365 is recycled CB produced through thermal decomposition of waste tires, and has an N 2 SA of 76 m 2 /g and a DBP oil absorption of 88 ml/100 g.
  • the above various commercially available recycled CBs contain about 17% by mass of ash.
  • a typical elemental composition contained in the ash of the PB365 is as follows. Generally, when the amounts of silica and calcium are compared in regenerated CB, silica is contained more than calcium.
  • N 2 SA conforms to JIS K6217-2
  • DBP oil absorption conforms to ASTM D2414
  • ash content is measured by a known ICP method.
  • the rubber composition of the present invention contains at least the diene rubber, the CB and the recycled CB, and the total carbon black amount of the CB and the recycled CB (excluding ash contained in the recycled CB) is 30 to 130 parts by mass (preferably 60 to 100 parts by mass) with respect to 100 parts by mass of diene rubber, and the ratio of the recycled CB to the total amount of carbon black (excluding ash contained in the recycled CB) is 3 to 30% by mass (preferably 5 to 15% by mass).
  • the total amount of carbon black is less than 30 parts by mass with respect to 100 parts by mass of the diene rubber, the breaking strength is lowered.
  • the proportion of the recycled CB in the total amount of carbon black is less than 3% by mass, low heat build-up deteriorates, and when it exceeds 30% by weight, the strength at break deteriorates.
  • the rubber composition of the present invention includes vulcanizing or cross-linking agents; vulcanizing or cross-linking accelerators; various fillers such as silica, clay, talc and calcium carbonate; anti-aging agents; ; Resin; Various additives generally blended in rubber compositions such as curing agents can be blended. can be used for The blending amount of these additives can also be a conventional general blending amount as long as it does not contradict the object of the present invention.
  • the rubber composition of the present invention can achieve low heat build-up while maintaining breaking strength even when part of the total amount of carbon black is replaced with recycled carbon black. tread, rim cushion, etc.).
  • the tire of the present invention is preferably a pneumatic tire, and can be filled with air, an inert gas such as nitrogen, or other gases.
  • Breaking strength (TB): Tested at room temperature according to JIS K 6251. The results were indexed with the value of Standard Example 1 or 2 as 100. A larger index indicates better breaking strength.
  • tan ⁇ 60 ° C.: According to JIS K6394: 2007, using a viscoelastic spectrometer (manufactured by Toyo Seiki Seisakusho), under conditions of extension deformation strain rate 10 ⁇ 2%, frequency 20 Hz, temperature 60 ° C., tan ⁇ (60 °C) was measured. The results were indexed with the value of Standard Example 1 or 2 as 100. A smaller index indicates a lower heat build-up. Comparative Examples 1-4 and Examples 1-3 are compared with Standard Example 1, and Comparative Examples 5-8 and Examples 4-6 are compared with Standard Example 2.
  • the rubber compositions of Examples 1 to 6 are tire rubber compositions containing at least a diene rubber, carbon black and recycled carbon black, and the nitrogen adsorption specific surface area of carbon black and recycled carbon black is N 2 Since the SA and DBP oil absorptions are set within specific ranges, and the blending amount of recycled carbon black is set within an appropriate range, compared to the rubber composition of Standard Example 1 or 2, part of the total amount of carbon black is recycled carbon It can be seen that even when replaced with black, low heat build-up can be achieved while maintaining breaking strength.
  • Comparative Examples 3 and 7 the nitrogen adsorption specific surface area N 2 SA of the blended carbon black exceeded the upper limit specified in the present invention, so the heat build-up deteriorated. Comparative Examples 4 and 8 deteriorated in breaking strength because the nitrogen adsorption specific surface area N 2 SA of the blended carbon black was less than the lower limit specified in the present invention.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Tires In General (AREA)

Abstract

Cette composition de caoutchouc pour pneumatiques comprend un caoutchouc à base de diène, du noir de carbone, et du noir de carbone recyclé, le noir de carbone ayant une surface spécifique d'adsorption d'azote N2SA de 30 à 90 m2/g et une absorption d'huile DBP de 70 à 140 ml/100 g, le noir de carbone recyclé a une surface spécifique d'adsorption d'azote N2SA de 65 À 95 2/g et une absorption d'huile DBP de 75-105 ml/100 g , la quantité totale de noir de carbone, qui est la somme du noir de carbone et du noir de carbone recyclé, est de 30 à 130 parties en masse pour 100 parties en masse du caoutchouc à base de diène, et la proportion du noir de carbone recyclé dans la quantité totale de noir de carbone est de 3 à 30 % en masse.
PCT/JP2022/012779 2021-03-22 2022-03-18 Composition de caoutchouc pour pneumatique, et pneumatique WO2022202698A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021047455A JP2022146475A (ja) 2021-03-22 2021-03-22 タイヤ用ゴム組成物およびタイヤ
JP2021-047455 2021-03-22

Publications (1)

Publication Number Publication Date
WO2022202698A1 true WO2022202698A1 (fr) 2022-09-29

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WO (1) WO2022202698A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023249020A1 (fr) * 2022-06-23 2023-12-28 住友ゴム工業株式会社 Pneumatique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024079282A (ja) * 2022-11-30 2024-06-11 株式会社ブリヂストン リサイクルカーボンブラック、ゴム組成物及びタイヤ

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55500113A (fr) * 1978-02-15 1980-02-28
JP2011046299A (ja) * 2009-08-27 2011-03-10 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2012001682A (ja) * 2010-06-21 2012-01-05 Bridgestone Corp ゴム組成物及びそれを用いたタイヤ
CN102634075A (zh) * 2012-04-25 2012-08-15 杭州电子科技大学 一种橡胶补强方法
JP2012521443A (ja) * 2009-03-24 2012-09-13 リッペ リソース リカバリー コーポレイション 廃タイヤからの炭素質材料の再生方法及び廃タイヤ由来の生成物
JP2013151584A (ja) * 2012-01-24 2013-08-08 Toyo Tire & Rubber Co Ltd 防振ゴム用ゴム組成物
JP2014031425A (ja) * 2012-08-02 2014-02-20 Yokohama Rubber Co Ltd:The タイヤリムクッションまたはガムフィニッシング用ゴム組成物およびそれを用いた空気入りタイヤ
CN104479722A (zh) * 2014-05-12 2015-04-01 中机国宏（北京）高分子裂解技术研究院 防止二噁英产生的废旧轮胎连续分段裂解设备及工艺
EP3173251A1 (fr) * 2015-11-27 2017-05-31 Bridgestone Corporation Caoutchouc pour pneu comprenant de noir de carbone recycle
CN111455183A (zh) * 2020-05-14 2020-07-28 沈阳鑫迪环境技术有限公司 一种废轮胎裂解炭黑净化协同回收铅、锌的方法
JP2020523456A (ja) * 2017-06-29 2020-08-06 株式会社ブリヂストン リサイクルカーボンブラックを含む空気入りタイヤ用ゴム配合物

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55500113A (fr) * 1978-02-15 1980-02-28
JP2012521443A (ja) * 2009-03-24 2012-09-13 リッペ リソース リカバリー コーポレイション 廃タイヤからの炭素質材料の再生方法及び廃タイヤ由来の生成物
JP2011046299A (ja) * 2009-08-27 2011-03-10 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2012001682A (ja) * 2010-06-21 2012-01-05 Bridgestone Corp ゴム組成物及びそれを用いたタイヤ
JP2013151584A (ja) * 2012-01-24 2013-08-08 Toyo Tire & Rubber Co Ltd 防振ゴム用ゴム組成物
CN102634075A (zh) * 2012-04-25 2012-08-15 杭州电子科技大学 一种橡胶补强方法
JP2014031425A (ja) * 2012-08-02 2014-02-20 Yokohama Rubber Co Ltd:The タイヤリムクッションまたはガムフィニッシング用ゴム組成物およびそれを用いた空気入りタイヤ
CN104479722A (zh) * 2014-05-12 2015-04-01 中机国宏（北京）高分子裂解技术研究院 防止二噁英产生的废旧轮胎连续分段裂解设备及工艺
EP3173251A1 (fr) * 2015-11-27 2017-05-31 Bridgestone Corporation Caoutchouc pour pneu comprenant de noir de carbone recycle
JP2020523456A (ja) * 2017-06-29 2020-08-06 株式会社ブリヂストン リサイクルカーボンブラックを含む空気入りタイヤ用ゴム配合物
CN111455183A (zh) * 2020-05-14 2020-07-28 沈阳鑫迪环境技术有限公司 一种废轮胎裂解炭黑净化协同回收铅、锌的方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023249020A1 (fr) * 2022-06-23 2023-12-28 住友ゴム工業株式会社 Pneumatique

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