Rubber composition for tire and tire including same

A rubber composition, tire technology, applied in the direction of tire tread/tread pattern, special tire, tire parts, etc. Deterioration of low rolling resistance and reduction of silica dispersibility, resulting in improved driving stability, excellent balance, and good dispersibility

CN113195617AActive Publication Date: 2021-07-30THE YOKOHAMA RUBBER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-07-30

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Abstract

Provided are: a rubber composition for a tire which is excellent in terms of dry steering stability, wet steering stability, low-rolling resistance, and on-snow performance; and a tire including the same. The rubber composition is characterized by being formed by adding 80-100 parts by mass of an inorganic filler and 0.5-5 parts by mass of alkylsilane having a C3-C20 alkyl group to 100 parts by mass of a diene rubber comprising a total 100 mass% of 20-45 mass% of a natural rubber, 20-45 mass% of a styrene butadiene rubber, and 20-45 mass% of a butadiene rubber, wherein the rubber hardness at 23 deg C is 68 or more.
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Description

technical field

[0001] The present invention relates to a rubber composition for tires excellent in dry driving stability, wet driving stability, low rolling resistance and on-snow performance, and a tire comprising the rubber composition for tires. Background technique

[0002] For all-season tires mounted on high-performance vehicles, in order to improve safety at high-speed driving, excellent dry driving stability and wet driving stability are required, and low rolling resistance is required to improve fuel consumption performance. Make on-snow performance high. However, these properties are contradictory, and thus difficult to simultaneously satisfy at a high level. For example, if the rubber hardness of the rubber composition is lowered for the purpose of improving on-snow performance, the rigidity of the tread portion is lowered, and the dry driving stability and wet driving stability are lowered. In addition, if the content of butadiene rubber is increased to lower ...

Examples

Embodiment

[0063] The compounding agents shown in Table 3 are common compounds, and for the 19 kinds of rubber compositions for tires (Examples 1-8, Standard Examples, Comparative Examples 1-10) composed of the compounds shown in Tables 1 and 2 , components other than sulfur and the vulcanization accelerator were kneaded for 5 minutes with a 1.7 L closed-type Banbury mixer, and then released from the mixer and cooled to room temperature. This was put into a 1.7-L closed-type Banbury mixer, and sulfur and a vulcanization accelerator were added and mixed to prepare a rubber composition for tires. In addition, in the column of styrene-butadiene rubber (SBR) in Tables 1 and 2, in addition to the compounded amount of the product, the compounded amount of SBR by net weight excluding the oil-extending component is described in parentheses. In addition, the compounding quantity of the compounding agent described in Table 3 is represented by mass parts with respect to 100 mass parts of diene rubb...