Rubber composition for tires and pneumatic tire using the same
A rubber composition and tire technology, applied in the rubber composition for tires and the field of pneumatic tires, can solve the problem of high cohesion, low affinity between silica and rubber components, and inability to fully obtain reduced rolling resistance wet performance, etc. problem, to achieve the effect of excellent processability, excellent wet performance, and excellent wear resistance
Inactive Publication Date: 2017-06-09
THE YOKOHAMA RUBBER CO LTD
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Problems solved by technology
To face such a problem, it is known to mix silica into the rubber component constituting the tire tread portion, but the affinity between silica and the rubber component is low, and the cohesion between silica is high, so even in rubber Only silicon dioxide is added to the ingredients, and the silicon dioxide is not dispersed, and there is a problem that the effect of reducing the rolling resistance and the effect of improving the wet performance cannot be sufficiently obtained.
Method used
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Embodiment
[0180] Hereinafter, examples are shown to specifically explain the present invention. However, the present invention is not limited to this.
[0181]
[0182] In a 2L separable flask equipped with a stirrer, a reflux cooler, a dropping funnel and a thermometer, 107.8g of bis(triethoxysilylpropyl)tetrasulfide (KBE-846 manufactured by Shin-Etsu Chemical Industry) (0.2mol), γ-mercaptopropyltriethoxysilane (KBE-803 manufactured by Shin-Etsu Chemical Industry) 190.8g (0.8mol), Octyltriethoxysilane (KBE-3083 manufactured by Shin-Etsu Chemical Industry) 442.4g ( 1.6 mol), 190.0 g of ethanol, and then a mixed solution of 37.8 g (2.1 mol) of 0.5N hydrochloric acid and 75.6 g of ethanol was added dropwise at room temperature. Then, it was stirred at 80°C for 2 hours. Then, it filtered, 17.0g of 5% KOH / EtOH solution was dripped, and it stirred at 80 degreeC for 2 hours. Then, it was concentrated under reduced pressure and filtered to obtain 480.1 g of polysiloxane as a brown transparent ...
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Abstract
The present invention relates to a rubber composition for tires and a pneumatic tire using the rubber composition for tires in tire treads, the rubber composition for tires comprising: 100 parts by mass of diene rubber; 60 to 200 parts by mass The silicon dioxide of part; The average composition formula (1)(A)a(B)b(C)c(D)d(R1)eSiO(4-2a-b-b- c‑d‑e) / 2(1) [wherein, A represents a divalent organic group containing a sulfide group, B represents a monovalent hydrocarbon group with 5 to 10 carbon atoms, C represents a hydrolyzable group, and D represents An organic group containing a mercapto group, R1 represents a monovalent hydrocarbon group with 1 to 4 carbon atoms, satisfying 0≤a<1, 0≤b<1, 0<c<3, 0<d<1, 0≤e<2 , 0<2a+b+c+d+e<4 relational expression. Any one of a and b is not 0. ] the polysiloxane shown; 0.05 to 3.0 parts by mass of thiuram disulfide vulcanization accelerator.
Description
Technical field [0001] The present invention relates to a rubber composition for tires and a pneumatic tire using the rubber composition for tires. Background technique [0002] In the past, tires used in vehicles have been required to improve wet performance (wet gripping performance) from the perspective of safety during driving, and to reduce the rolling resistance of tires from the perspective of fuel efficiency. Faced with such problems, it is known that silica is added to the rubber component constituting the tire tread, but the affinity between silica and the rubber component is low, and the cohesion between silica is high, so even in rubber Only silica is blended in the ingredients, and the silica is not dispersed, and there is a problem that the effect of reducing rolling resistance and the effect of improving wet performance cannot be sufficiently obtained. [0003] In response to such a problem, it is known that a mercaptosilane (a silane coupling agent having a mercapt...
Claims
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IPC IPC(8): C08L9/00C08K3/36C08K5/40C08K5/548C08L83/08C08L83/14B60C1/00
CPCC08L21/00B60C1/0016C08K3/36C08K5/40C08K5/548C08L83/04C08L83/08C08F36/04C08L9/00
Inventor 佐藤正树三原谕
Owner THE YOKOHAMA RUBBER CO LTD