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Rubber composition for tires

A technology of rubber composition and tire, applied in the field of rubber composition of tire tread, can solve problems such as low dispersibility, and achieve the effects of low heat build-up and excellent wear resistance

Inactive Publication Date: 2007-08-08
YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, when silica is compounded into a rubber composition for tires, since the dispersibility of silica in rubber components and the like is low, there is a limit to the content of silica compounded into the rubber composition

Method used

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  • Rubber composition for tires
  • Rubber composition for tires
  • Rubber composition for tires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3 and comparative Embodiment 1～4

[0054] Preparation of test samples

[0055] The components of each rubber formulation shown in Table I below, except sulfur and vulcanization accelerator, were mixed in a 1.8 liter internal mixer for 3-5 minutes. When 150°C was reached, the mixture was discharged as a masterbatch. The sulfur and vulcanization accelerator were then added and mixed by an 8-inch open mill to obtain a rubber composition, which was then used for the following tests.

[0056] Test Methods

[0057] 1) Vulcanization rate (ie optimum vulcanization time T95): Measured according to JIS K6300. Measure t at 1 degree amplitude and 160°C with a vibrating disc vulcanization tester 95 time (min). Comparative Example 1 is shown with an index of 100. The smaller the value, the faster the indicated rubber vulcanizes.

[0058] 2) ΔG': αTechnology RPA2000 is commonly used to measure shear stress-strain G'. The unvulcanized rubber prepared above was vulcanized at 160°C for 20 minutes. G' was measured at ...

Embodiment 4～7 and comparative Embodiment 5～7

[0079] Preparation of rubber composition

[0080] The rubber, silica, carbon black, coupling agent, zinc white and other materials except the vulcanization system were mixed for 5 minutes using a 1.8 liter internal Banbury mixer according to Table II below. The mixture was then discharged from the mixer at 150°C and subsequently cooled to room temperature. Thereafter, the mixture was mixed for 5 minutes using a 1.8-liter internal Banbury mixer, discharged at 150° C., and then the vulcanization accelerator and sulfur were mixed in using an open mill. In Example 4, the rubber, silica, carbon black, coupling agent, zinc white and other materials except the vulcanization system were mixed using a 1.8 liter internal Banbury mixer according to Table II below for 10 minute. The mixture was discharged from the mixer at 150°C and then cooled to room temperature. Thereafter, the mixture was again mixed for 10 minutes using a 1.8 liter internal Banbury mixer. The mixture was discha...

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PUM

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Abstract

The invention relates to a rubber composition for tire, which comprises: (A) conjugated diene rubber of 100 weight, (B) 90 to 150 parts by weight of a reinforcing filler containing silica, (C) 0 to 40 parts by weight of an oil, (D) 4 to 20% by weight, based upon the weight of the silica, a silane coupling agent having the formula (I): Y<3>Si-CH<2n> A (I). Wherein, Y represents the alkyl or alkoxy or chlorine with 1 to 25 carbon atoms, and the three Y's may be the same or different, n is an integer of 1 to 6; A is a hydrosulphonyl or SZ radical, wherein Z is the following radical: formula (1-1), (1-2) or (1-3) and m is the integer of 1 to 6, (E) sulfur, and (F) 0.05 to 5 parts by weight of a thiuram disulfide-based vulcanization accelerator having the formula (II). Wherein, R<5>, R<6>, R<7> and R<8> independently have an alkyl with 2 to 18 carbon atoms, with the greatly shortened vulcanization time, preferable dispersibility of silicon dioxide, with preferable braking performance, abrasion bearing performance and low rolling resistance of the vulcanized rubber.

Description

technical field [0001] The present invention relates to a silica-compounded rubber composition for tires, and more particularly to a rubber composition suitable for use as tires, especially tire treads, which can greatly shorten the vulcanization time, Silica is excellent in dispersibility, and exhibits excellent braking performance, wear resistance, and low rolling resistance after vulcanization. Background technique [0002] If a large amount of silica is compounded into a silica compounded rubber composition, there is a problem of delay in vulcanization due to adsorption of a vulcanization accelerator. There is also a problem that the dispersibility of silica in rubber is poor, and thus the processability and physical properties of the rubber composition are lowered. In order to solve this problem, a technique of using a vulcanization accelerator based on thiuram disulfide to increase the vulcanization rate of a rubber composition compounded with a silane coupling agent ...

Claims

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Application Information

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IPC IPC(8): C08L9/00C08K5/40B60C1/00C08K5/548C08K3/36
CPCY02T10/86
Inventor 龟田庆宽纲野直也
Owner YOKOHAMA RUBBER CO LTD
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