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Method for producing modified conjugated diene polymer, modified conjugated diene polymer, and rubber composition

一种橡胶组合物、共轭二烯的技术，应用在轮胎零部件、车辆部件、特殊轮胎等方向，能够解决改性改良少、橡胶组合物改性效果未必充分、无法获得橡胶改性效果等问题，达到加工性良好、耐磨耗性优异的效果

Active Publication Date: 2009-12-09
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of these methods are suitable for polymers whose terminal activity can be easily ensured, and there are few improvements in the modification of cis-1,4-polybutadiene, which is particularly important in tire sidewall rubber, tire tread rubber, etc. , and the modification effect of the rubber composition compounded with carbon black and silica may not be sufficient
Especially for cis-1,4-polybutadiene, the current situation is that it is almost impossible to obtain the modification effect of rubber compounded with carbon black

Method used

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  • Method for producing modified conjugated diene polymer, modified conjugated diene polymer, and rubber composition
  • Method for producing modified conjugated diene polymer, modified conjugated diene polymer, and rubber composition
  • Method for producing modified conjugated diene polymer, modified conjugated diene polymer, and rubber composition

Examples

Experimental program
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Effect test

Embodiment 1

[0176] Embodiment 1 (manufacture of modified polymer A):

[0177] In a nitrogen-substituted 5-liter reactor, 2.4 kg of cyclohexane and 300 g of 1,3-butadiene were charged under a nitrogen atmosphere. To this, a cyclohexane solution of neodymium tertiary carbonate (0.09 mmol), a toluene solution of methylaluminoxane (hereinafter also referred to as "MAO") (3.6 mmol), hydrogenated diisobutyl A toluene solution of aluminum (hereinafter also referred to as "DIBAH") (5.5mmol) and diethylaluminum chloride (0.18mmol) was reacted with 1,3-butadiene (4.5mmol) at 40°C and aged for 30 minutes. The obtained catalyst was polymerized at 60°C for 60 minutes. The reaction conversion of 1,3-butadiene was almost 100%.

[0178] Take out 200 g of this polymer solution into a methanol solution containing 0.2 g of 2,4-di-tert-butyl-p-cresol, stop the polymerization, remove the solvent by stripping, and dry with a roller at 110° C. to obtain Polymer before modification (conjugated diene polymer)....

Embodiment 2

[0184] Embodiment 2 (manufacture of modified polymer B):

[0185] In addition to using polymethylene polyphenyl polycyanate (trade name "PAPI*135" (manufactured by DOWCHEMICAL, Japan)) (hereinafter also referred to as "CMDI" (4.16mmol in NCO conversion)) instead of in Example 1 Modified polymer B (modified conjugated diene polymer) was obtained in the same manner as in Example 1, except for the PMDI (2.08 mmol). Table 1 shows the modification conditions and the results of the modification reaction.

Embodiment 3

[0186] Embodiment 3 (manufacture of modified polymer C):

[0187] Except using hexamethyldisilazane (hereinafter also referred to as "HMDS") instead of HMDA in Example 2, all the other operations were performed in the same manner as in Example 2 to obtain modified polymer C (modified conjugated di ethylenic polymers). Table 1 shows the modification conditions and the results of the modification reaction.

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Abstract

Disclosed is a method for producing a modified conjugated diene polymer, which comprises a step (A) wherein a primary modified conjugated diene polymer is obtained by performing a primary modification reaction wherein a conjugated diene polymer having an active end, while having a vinyl content of less than 10% and a cis-1,4- bond content of not less than 75% is reacted with a heterocumulene compound having two or more specific functional groups; and a step (B) wherein a secondary modified conjugated diene polymer is obtained by further performing a secondary modification reaction wherein the thus-obtained primary modified conjugated diene polymer is reacted with an active hydrogen-containing compound containing one or more functional groups selected from the group consisting of an amino group, an imino group, a mercapto group and a hydroxyl group. This method enables to obtain a modified conjugated diene polymer which is excellent in low heat generation property (low fuel consumption property) and wear resistance.

Description

technical field [0001] The present invention relates to a method for producing a modified conjugated diene polymer, a modified conjugated diene polymer, a rubber composition, a tire component containing the rubber composition, and a tire having the tire component. More specifically, it relates to a method for producing a modified conjugated diene polymer capable of obtaining a modified conjugated diene polymer excellent in low heat generation (energy-saving properties) and abrasion resistance, and a method obtained by the method. A modified conjugated diene polymer, a rubber composition thereof, a tire component containing the rubber composition, and a tire having the tire component. Background technique [0002] In recent years, demands for energy saving of automobiles have become increasingly stringent in connection with social demands for energy saving. In order to meet such demands, further reduction in rolling resistance is required even for tire performance. As a met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/00C08K3/04B60C1/00C08K3/36C08F4/54C08L15/00C08F36/00
CPCC08L15/00B60C1/0041C08K3/36C08L9/06C08L7/00B60C1/0025C08K3/0033C08C19/44C08K3/04C08L21/00B60C1/0016C08L25/10B60C1/00C08F4/44C08F36/04C08K3/06C08K3/00C08L15/02C08K3/013C08L2666/08C08F4/54
Inventor 田中了司谷耕一郎曾根卓男但木稔弘
Owner BRIDGESTONE CORP
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