Method for producing modified conjugated diene polymer/copolymer, modified conjugated diene polymer/copolymer, and rubber composition and tier using the same

一种橡胶组合物、共轭二烯的技术，应用在特殊轮胎、轮胎零部件、车轮等方向，能够解决滚动阻力性能恶化等问题

Active Publication Date: 2011-04-20
BRIDGESTONE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Both of them are used to increase the elastic modulus of the rubber composition used in the sidewall reinforcing layer and the bead filler, and at the same time suppress the decrease in the elastic modulus at high temperature, and can obtain a large improvement in the run-flat durability, but Significant deterioration in rolling resistance performance during normal driving

Method used

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  • Method for producing modified conjugated diene polymer/copolymer, modified conjugated diene polymer/copolymer, and rubber composition and tier using the same
  • Method for producing modified conjugated diene polymer/copolymer, modified conjugated diene polymer/copolymer, and rubber composition and tier using the same
  • Method for producing modified conjugated diene polymer/copolymer, modified conjugated diene polymer/copolymer, and rubber composition and tier using the same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0261] In the case of adding the condensation accelerator during the preparation of the rubber composition I, it is preferable that the condensation accelerator and other components are usually at a temperature of about 20 to 185°C, preferably at a temperature of 60 to 175°C in the first stage. Mix down.

[0262] From the viewpoint of reactivity between silica and silanol, the content of the condensation accelerator in the rubber composition I is preferably 0.1 to 10 parts by mass, more preferably 0.5 to 5 parts by mass, based on 100 parts by mass of the rubber component.

[0263] The rubber component of the rubber composition I of the present invention is preferably composed of 10 to 100% by mass of the modified conjugated diene (co)polymer I represented by the above general formula (3) or the above general formula (4) and 90 to 0 % by mass of diene rubber. This is because the effect of the present invention can be enjoyed if the modified conjugated diene (co)polymer I is 10...

Embodiment

[0454] Next, the present invention will be described in further detail through examples, but the present invention is by no means limited by these examples.

[0455] In addition, the alcohol volatilization amount of the modified conjugated diene (co)polymer obtained in the following examples, the silanol production rate of the modified conjugated diene (co)polymer, and the dynamic loss tangent of the vulcanized rubber composition (tanδ) was measured according to the following method.

[0456] (1) Alcohol volatility

[0457] The sample was treated with a siloxane hydrolysis reagent composed of (0.2 mol / L toluenesulfonic acid) / (0.24 mol / L water) in a solvent containing 15% by mass of n-butanol and 85% by mass of toluene, and measured by headspace gas chromatography Stoichiometric amount of ethanol derived from [EtOSi] remaining in the tested modified conjugated diene (co)polymer.

[0458] (2) Silanol formation rate of modified conjugated diene (co)polymer

[0459]The amount o...

Synthetic example 1

[0470] Synthesis Example 1 (Synthesis of organosilane compound a used in the modification reaction step)

[0471] In a dry, nitrogen-substituted 300-ml pressure-resistant glass container, prepare 1 mol / liter of cyclohexane solution, dropwise add 2 mol / liter of diethyl ether solution of methyllithium (MeLi) with 2 times the molar amount, and stir fully to prepare organosilane compound a{N-(1,3-dimethyl Modifier solution (a) of butylene-3-(dimethylethoxysilyl)-1-propylamine}.

[0472] In addition, as N-(1,3-dimethylbutylene)-3-(triethoxysilyl)-1-propylamine, a product manufactured by Chisso Corporation under the trademark "Sila-Ace S340" was used.

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Abstract

Provided are a method for producing a modified conjugated diene polymer / copolymer including a modified reaction step for causing an organosilane compound having a characteristic group for producing a silanol group by hydrolysis and, in the vicinity of the characteristic group, (i) a functional group for combining the organosilane compound with the conjugated dione polymer / copolymer by performing an addition or substitutive reaction on an active site and, after the reaction, prompting a reaction between the silanol group and a reinforcing filler or (ii) a functional group for prompting the reaction between the silanol group and the reinforcing filler to react with the active site of a conjugated dione polymer / copolymer having the active site, and a hydrosis step performed after completing the modified reaction step; a modified conjugated diene polymer / copolymer having, at an end of a molecular of a conjugated diene polymer / copolymer, a silanol group and, in the vicinity of the silanol group, a functional group for prompting a reaction between the silanolgroup and a reinforcing filler; and a rubber composition having the modified conjugated polymer / copolymer and carbon black of a specific property; and a tier using the rubber composition.

Description

technical field [0001] The present invention relates to a method for producing a modified conjugated diene (co)polymer, the modified conjugated diene (co)polymer, a rubber composition using the same, and a tire using the rubber composition. Background technique [0002] In recent years, in response to social demands for energy saving and resource conservation, rubber materials with low wear and tear resistance have been increasingly desired in view of the durability of tires in order to save fuel consumption of automobiles. [0003] In order to improve the rolling resistance performance of tires, the method of using low heat build-up rubber compositions has become popular, and as a technology for expressing its performance, the use of modified polymers that introduce functional groups that interact with fillers is an extremely effective means . [0004] It is known that deterioration of durability cannot be avoided in the method of reducing the reinforcing filler in order t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C1/00B60C17/00C08F8/32C08K3/04C08L15/00C08L21/00
CPCC08C19/00C08C19/26C08F8/12C08F8/42C08K5/0091C08C19/22C08C19/25C08L9/00C08K5/098C08K5/057C08K3/0033C08L21/00C08L15/00C08C19/44C08L7/00B60C1/00C08K3/04C08K3/36C08K3/013Y10T152/10846C08L2666/08C08K5/5415
Inventor 田中健森贺子伊藤夕记小泽洋一中川隆二松下纯子松尾成晃真崎孝二白石文洋太田文德
Owner BRIDGESTONE CORP
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