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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，应用在改性共轭二烯系聚合物及橡胶组合物领域，能够解决加工性差、门尼粘度低等问题，达到形状稳定性优异、门尼粘度高的效果

Active Publication Date: 2010-06-23
ENEOS MATERIALS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the conjugated diene polymer obtained by this conventional method has problems of low Mooney viscosity and poor processability

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
Comparison scheme
Effect test

Embodiment 1

[0149] [1-1] Example 1 (synthesis of polymer A)

[0150] 2750 g of cyclohexane, 41.3 g of tetrahydrofuran, 125 g of styrene, and 365 g of 1,3-butadiene were placed in a nitrogen-substituted reactor with an internal volume of 5 liters. After adjusting the temperature of the reactor contents to 10° C., 215 mg of n-butyllithium was added to start polymerization. Polymerization was carried out under adiabatic conditions and the maximum temperature reached 85°C.

[0151] When the polymerization conversion rate reached 99%, 10 g of 1,3-butadiene was added and further polymerized for 5 minutes. A small amount of the polymer solution in the reactor was added to 30 g of a cyclohexane solution added with 1 g of methanol, and then 600 mg of methyltriethoxysilane was added as an alkoxysilane compound (primary modifier) ​​for modification The reaction was carried out for 15 minutes (step (a)). Then, 3.97 g of bis(2-ethylhexanoic acid) zirconia was added as a condensation accelerator (me...

Embodiment 2

[0156] [1-2] Embodiment 2 (synthesis of polymer B):

[0157] In Example 1, polymer B was obtained in the same manner as in Example 1 except that 3.97 g of bis(2-ethylhexanoate)zirconia was changed to 6.45 g of tetrakis(2-ethylhexanoate)titanium. The composition and physical properties of the obtained polymer B are shown in Table 1 and Table 2.

Embodiment 3

[0158] [1-3] Embodiment 3 (synthesis of polymer C):

[0159] In Example 1, polymer C was obtained in the same manner as in Example 1 except that 3.97 g of bis(2-ethylhexanoic acid) zirconia was changed to 2.49 g of tri-sec-butoxyaluminum. The composition and physical properties of the obtained polymer C are shown in Table 1 and Table 2.

[0160] [1-4] Embodiment 4 (synthesis of polymer D):

[0161] In Example 1, except having changed the primary modifier into 803 mg of 3-glycidoxypropyltrimethoxysilane, it carried out similarly to Example 1, and obtained the polymer D. The composition and physical properties of the obtained polymer D are shown in Table 1 and Table 2.

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Abstract

The invention discloses a method for producing a modified conjugated diene polymer comprising a step (a) for obtaining a primarily modified polymer by performing a primary modification reaction wherein at least one compound selected from the group consisting of alkoxysilane compounds and silanol compounds is introduced into an active alkali metal end of a conjugated diene polymer having an activealkali metal end, and a step (b) for obtaining a secondarily modified polymer (a modified conjugated diene polymer) by subjecting the thus-obtained primarily modified polymer to reactions including the step (b1) and the step (b2) below. This method enables to desirably produce a conjugated diene polymer having high Mooney viscosity and excellent shape stability. Step (b1): The primarily modified polymer is reacted with a condensation accelerator containing a metal element. Step (b2): The primarily modified polymer is reacted with at least one member selected from the group consisting of inorganic acids and metal halides.

Description

technical field [0001] The present invention relates to a method for producing a modified conjugated diene polymer, a modified conjugated diene polymer, and a rubber composition. More specifically, it relates to a method for producing a modified conjugated diene polymer capable of producing a modified conjugated diene polymer having a high Mooney viscosity and excellent shape stability, and a modified product obtained by the production method. A conjugated diene polymer and a rubber composition. Background technique [0002] In recent years, in connection with the social demand for energy saving, the demand for energy saving of automobiles has become increasingly severe. In order to meet such demands, further reduction in rolling resistance is required for tire performance as well. As a method of reducing tire rolling resistance, a method of optimizing the structure of the tire has also been studied, but a general method is to use a material with less heat generation as a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/42C08K3/04C08K3/36C08L15/00
CPCC08C19/12C08C19/16C08L21/00C08K3/0033C08L15/00C08C19/44C08L9/06C08K3/16C08K3/24C08K5/54C08L9/00C08K3/013C08L2666/08C08C19/42C08F8/42C08F36/04
Inventor 松本贵臣柴田昌宏曾根卓男但木稔弘田中健中川隆二
Owner ENEOS MATERIALS CORP
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