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Rubber composition and pneumatic tire formed from said rubber composition

A rubber composition and rubber technology, applied in special tires, tire parts, transportation and packaging, etc., can solve the problems of rubber composition hardness increase, processability deterioration, low fuel consumption and wear resistance, etc. Achieve good processability, improve low fuel consumption and wear resistance

Active Publication Date: 2017-07-28
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, even with the method of introducing a functional group having an affinity with the filler or the method of using a high-molecular-weight polymer, there are problems that the hardness of the rubber composition increases and the processability deteriorates.
[0005] Patent Document 1 discloses a rubber composition for tires in which low fuel consumption and wear resistance are improved by compounding a liquid resin having a softening point of -20 to 45°C and specific silica. There is still room for improvement in terms of improving these performances in a well-balanced manner while making the workability the best

Method used

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  • Rubber composition and pneumatic tire formed from said rubber composition
  • Rubber composition and pneumatic tire formed from said rubber composition
  • Rubber composition and pneumatic tire formed from said rubber composition

Examples

Experimental program
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Embodiment

[0115] The present invention is specifically described based on examples, but the present invention is not limited to them.

[0116] Various chemicals used in the production examples are described below.

[0117]Ion-exchanged water: manufactured by our company

[0118] Potassium rosinate soap: manufactured by Harima Chemicals, INC.

[0119] Fatty acid sodium soap: manufactured by Wako Pure Chemical Industries, Ltd.

[0120] Potassium chloride: manufactured by Wako Pure Chemical Industries, Ltd.

[0121] Sodium naphthalenesulfonate formaldehyde condensate: manufactured by Kao Co., Ltd.

[0122] Styrene: Styrene manufactured by Wako Pure Chemical Industries, Ltd.

[0123] 1,3-butadiene: 1,3-butadiene manufactured by Takachiho Shoji Co., Ltd.

[0124] Tert-dodecyl mercaptan: tert-dodecyl mercaptan (chain transfer agent) manufactured by Wako Pure Chemical Industries, Ltd.

[0125] Sodium hydrosulfide (sodium hydrosulfide): manufactured by Wako Pure Chemical Industries, Ltd. ...

manufacture example 1

[0137] A stainless steel polymerization reactor with an internal volume of 50 liters was washed, dried, and replaced with dry nitrogen, and then 3,000 g of 1,3-butadiene, 2,000 g of styrene, 5.74 g of t-dodecyl mercaptan, and the above-mentioned emulsifier were added. 9688g, sodium hydrosulfide 6.3ml (1.8M), active agent (FeSO 4 / EDTA / rongalit) 6.3 ml each, and 6.3 ml (2.3 M) of the polymerization initiator were polymerized at 10° C. for 3 hours while stirring. After the polymerization, add 2.9g of N,N-diethylhydroxylamine, carry out the reaction for 30 minutes and take out the contents of the polymerization reaction vessel, add 10g of 2,6-di-tert-butyl-p-cresol, and evaporate most of the water , and then dried under reduced pressure at 55°C for 12 hours to obtain Copolymer 1.

manufacture example 2

[0139] 3000 g of 1,3-butadiene and 2000 g of styrene in Production Example 1 above were changed to 2500 g of 1,3-butadiene, 1000 g of styrene, 1000 g of farnesene, and 500 g of diethyl itaconate (IDE), except Otherwise, it was manufactured by the same method, and the copolymer 2 was obtained.

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PUM

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Abstract

Provided are a rubber composition that shows a balanced improvement in fuel economy and abrasion resistance while having good processability, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition containing: a rubber component including a copolymer containing a structural unit derived from a conjugated diene monomer, a structural unit derived from farnesene, and a structural unit derived from a compound represented by the formula (1) below; and carbon black and / or silica, wherein R11 and R12 are the same as or different from each other and each represent a hydrogen atom or a C1-C30 hydrocarbon group.

Description

technical field [0001] The present invention relates to a rubber composition and a pneumatic tire manufactured using the rubber composition. Background technique [0002] The tire tread is mainly required to provide performances such as low fuel consumption and abrasion resistance at a high level, and various methods of improving these performances are being studied. [0003] For example, as a method of improving low fuel consumption, a method of introducing a functional group having an affinity with a filler into a polymer terminal is known. In addition, as a method of improving wear resistance, a method of using a molecular weight of 250,000 or more is known. method for high molecular weight polymers. [0004] However, even with the method of introducing a functional group having an affinity with the filler or the method of using a high molecular weight polymer, there are problems that the hardness of the rubber composition increases and the processability deteriorates. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00C08L9/06C08K13/02C08K3/36C08K3/04C08K3/22C08K5/09C08K3/06B60C1/00
CPCB60C1/0016C08L9/00C08L9/06C08L2205/035C08L2205/03C08K2003/2296C08L91/06C08K13/02C08K3/36C08K3/04C08K3/22C08K5/09C08K3/06B60C1/00C08F236/22C08F236/06C08F2/24C08F236/10C08L47/00C08L15/00
Inventor 大下雅树渡边显哉端场俊文
Owner SUMITOMO RUBBER IND LTD
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