Vulcanized rubber composition and tire using same

A vulcanized rubber and composition technology, applied in special tires, tire parts, transportation and packaging, etc., can solve the problems of inability to achieve wear resistance, damage resistance, low fuel consumption, and deterioration of system dispersion

Active Publication Date: 2021-01-29
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] On the other hand, in the case of polymer blends of butadiene rubber (BR) and styrene butadiene rubber (SBR), the silica is partial to the SBR and does not sufficiently reinforce the BR so that it does not contribute uniformly to the Stress is applied to the entire rubber, and there is a problem that it is impossible to improve the wear resistance and damage resistance; or the dispersion of the entire system is deteriorated, and there is a problem that it is impossible to improve the fuel consumption performance.

Method used

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  • Vulcanized rubber composition and tire using same
  • Vulcanized rubber composition and tire using same
  • Vulcanized rubber composition and tire using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6 and comparative example 1～3

[0093] For each vulcanized rubber composition whose indexes α, β, γ, and δ of the vulcanized rubber composition have the values ​​shown in Table 1, the following tests were used to evaluate wear resistance performance, low fuel consumption performance and fracture resistance performance. The results of each test are listed in Table 1. It should be noted that, regarding the measurement and evaluation of α, δ, wear resistance performance, low fuel consumption performance, and damage resistance performance, the vulcanized rubber composition was stored at room temperature, and after 200 hours (about 1 week) after the vulcanization was completed, Measurements and evaluations were performed on vulcanized rubber compositions. β corresponds to the content (mass) of styrene butadiene rubber incompatible with butadiene rubber relative to the total rubber component (mass) contained in the production of the vulcanized rubber composition, and γ is α / β.

[0094]

[0095] Using the Lambou...

Synthetic example 1

[0128] Synthesis Example 1: Synthesis of SBR1

[0129] 28 g of cyclohexane, 8.6 mmol of tetramethylethylenediamine, and 6.1 mmol of n-butyllithium were added to a 100 ml ampoule purged with nitrogen. Next, 8.0 g of isoprene was gradually added and reacted in an ampoule at 60° C. for 120 minutes to obtain an isoprene block (as an initiator 1).

[0130] Initiator 1 had a weight average molecular weight of 2200, a vinyl bond content of 72.3 (mass %), and a molecular weight distribution (Mw / Mn) of 1.08.

[0131] Next, 4000 g of cyclohexane, 483.5 g of 1,3-butadiene, 211.5 g of styrene, and 0.18 g of tetramethylethylenediamine were charged under a nitrogen atmosphere into an autoclave equipped with a stirrer, and then all the initiators were added. Agent 1, polymerization started at 40°C. After confirming that the polymerization conversion rate reached the range of 95% to 100%, 0.08 mmol of 1,6-bis(trichlorosilyl)hexane was added in the state of a 20% by mass concentration of cyc...

Synthetic example 2

[0147] Synthesis Example 2: Synthesis of SBR2

[0148] Cleaning, drying, and replacement with dry nitrogen in a stainless steel polymerization reactor with an internal volume of 20 liters, and hexane (specific gravity 0.68g / cm 3 ) 10.2kg, 547g of 1,3-butadiene, 173g of styrene, 6.1ml of tetrahydrofuran, and 5.0ml of ethylene glycol diethyl ether were put into the polymerization reactor. Next, 13.1 mmol of n-butyllithium was added as a n-hexane solution to start polymerization.

[0149]The stirring rate was set at 130 rpm, the temperature in the polymerization reactor was set at 65° C., and the monomers were continuously supplied into the polymerization reactor, while performing copolymerization of 1,3-butadiene and styrene for 3 hours. The supplied amount of 1,3-butadiene in all polymerizations was 821 g, and the supplied amount of styrene was 259 g.

[0150] Next, the obtained polymer solution was stirred at a stirring rate of 130 rpm, 11.1 mmol of 3-diethylaminopropyltriet...

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Abstract

A vulcanized rubber composition assuring a well-balanced improvement of abrasion resistance, fuel efficiency and breaking resistance and a tire using a tread made of the vulcanized rubber composition are provided. The vulcanized rubber composition comprises a phase (SBR phase) comprising a styrene butadiene rubber being incompatible with a butadiene rubber and silica, and a phase (BR phase) comprising a butadiene rubber and silica, wherein the SBR phase and the BR phase are incompatible with each other, an abundance ratio alfa of silica in the SBR phase after vulcanization satisfies 0.3 less than or equal to Alfa less than or equal to.7 (Relation 1), and a proportion Beta of the styrene butadiene rubber being incompatible with the butadiene rubber satisfies 0.4 less than or equal to Beta less than or equal to 0.8 (Relation 2), and the tire has a tread composed of the vulcanized rubber composition.

Description

technical field [0001] The present invention relates to a vulcanized rubber composition and a tire having a tread made of the vulcanized rubber composition. Background technique [0002] Conventionally, fuel consumption of vehicles has been reduced by reducing rolling resistance of tires (improving fuel consumption performance). The rolling resistance of tires is mainly determined by the low heat release properties of the rubber used in tire components. Therefore, efforts are being made to achieve low heat release properties of rubber, and various formulations for fuel efficiency have been studied. Especially for fillers, not only conventional carbon black but also silica, which contributes to low fuel consumption, is used in many cases. [0003] On the other hand, as a method of improving various tire performances such as low fuel consumption performance, low-temperature performance, ice and snow performance, and wear resistance in a good balance, mixing two or more polyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/00C08L9/06C08L87/00C08L91/00C08L91/06C08K13/02C08K3/36C08K3/04C08K3/06C08K3/22C08K5/09B60C1/00
CPCB60C1/0016C08K2003/2296C08L9/00C08L9/06C08L87/00C08L2205/02C08L2205/03C08L2205/035C08L91/00C08L91/06C08K13/02C08K3/36C08K3/04C08K3/06C08K3/22C08K5/09
Inventor 伊藤和加奈
Owner SUMITOMO RUBBER IND LTD
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