Rubber composition, vulcanized rubber and tire

A rubber composition and vulcanized rubber technology, applied in special tires, tire parts, tire treads/tread patterns, etc., can solve problems such as reduced braking performance, and achieve high hysteresis loss and excellent braking performance on ice. Effect

Active Publication Date: 2020-07-31
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the tires are driven on icy and snowy roads, the tires slip due to the water film formed between the road surface and the tires, and the braking performance decreases

Method used

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  • Rubber composition, vulcanized rubber and tire
  • Rubber composition, vulcanized rubber and tire
  • Rubber composition, vulcanized rubber and tire

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0218] [Preparation of rubber composition]

[0219] The rubber composition of the present invention can be prepared by compounding and kneading the above-mentioned components using a kneader such as a Banbury mixer, a roll, or an internal mixer.

[0220] At this stage, the compounding amounts of the rubber component, filler, and others are the same as those in the above-mentioned rubber component.

[0221] The components may be mixed in a single step or in two or more separate steps. Examples of the method of kneading the components in two steps include where the rubber component, filler, resin, silane coupling agent, hydrophilic short fibers, and other compounding components other than the vulcanizing agent and blowing agent are mixed Mixing in the first step, and mixing the vulcanizing agent and blowing agent in the second step.

[0222] The maximum temperature of the first step of kneading is preferably 130 to 170°C and the maximum temperature of the second step is prefer...

Embodiment

[0230] Hereinafter, the present invention will be described in more detail with reference to examples, but these examples are for the purpose of illustrating the present invention and do not limit the present invention.

[0231] [Preparation of rubber composition]

[0232] According to the compounding recipes shown in Tables 1 and 2, sample rubber compositions were prepared by kneading the compounding components in the rubber composition using a Banbury mixer. Sulfur as a vulcanizing agent and a vulcanization accelerator are blended in the final stage of kneading.

[0233] Table 1

[0234] Rubber components (rubber components 1 to 3 described in Table 2) The amount shown in Table 2 Filler (carbon black) The amount shown in Table 2 Filler (Silica) The amount shown in Table 2 A silane coupling agent 3 resin 20 stearic acid 2 Zinc oxide 2 vulcanization accelerator 1 Vulcanizing agent 2 Antiaging agent 2 Foa...

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Abstract

Provided is a rubber composition which achieves both a low elastic modulus at a low temperature and a large hysteresis loss at a low temperature and from which a tire showing good brake performance onice can be obtained. The rubber composition comprises rubber components comprising a natural rubber, a polybutadiene rubber and a styrene-butadiene copolymer rubber and 50-90 parts by mass, per 100 parts by mass of the rubber components, of a silica-containing filler, wherein: the mass (n) of the natural rubber in the rubber components is 40 mass% or more; the mass (n), the mass (b) of the polybutadiene rubber and the mass (s) of the styrene-butadiene copolymer rubber satisfy the requirement s<=b<=n (provided that when n is equal to b, s is smaller than b); and 50 mass% or more of silica is contained in a phase containing the polybutadiene rubber and the styrene-butadiene copolymer rubber.

Description

technical field [0001] The present invention relates to rubber compositions, vulcanized rubber and tires. Background technique [0002] When a tire is made to run on an ice-snow road, the tire slips due to a water film formed between the road surface and the tire, and braking performance decreases. Therefore, studless tires are required to have improved performance on ice, such as grip and ease of control of the vehicle, even on icy and snowy roads. [0003] For example, PLT 1 discloses a rubber composition for tire treads for the purpose of providing a rubber composition for tire treads that allows a balance between wet performance and wear resistance and on-snow performance beyond conventional levels, wherein the The rubber composition for tire treads is a rubber composition comprising 40% by weight or more of terminal-modified styrene-butadiene rubber, 8 to 35% by weight of natural rubber, and 15 to 40% by weight relative to 100 parts by mass. A diene-based rubber conta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00B60C1/00C08J9/06C08K3/04C08K3/36C08K7/02C08L9/00C08L9/06
CPCB60C1/0016B60C2011/145B60C2011/147C08C19/22C08C19/25C08F36/06C08F236/10C08J9/0061C08J9/0066C08J9/0085C08J9/06C08J2201/026C08J2307/00C08J2400/108C08J2409/00C08J2409/06C08L7/00Y02T10/86C08L15/00C08K3/04C08K3/36C08F4/48C08L9/00C08L9/06C08K7/02
Inventor 岸本祥子
Owner BRIDGESTONE CORP
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