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Method for producing modified conjugated diene polymer and rubber composition using polymer produced by the method

A manufacturing method and technology of copolymers, which are applied in transportation and packaging, special tires, tire parts, etc., can solve problems such as difficult to achieve branched structure, difficult to adjust polymer microstructure, and difficult to adjust content

Active Publication Date: 2019-10-01
HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In USP 8278395 B2 and KR20045225 B1, a modifier having a polyvalent glycidyl functional group for terminal modification is also added to a conjugated diene polymer that is initiated and polymerized by an organometallic catalyst such as butyllithium. Molecules are produced by introducing modified conjugated diene polymers with such functional groups into inorganic additives such as silica to improve compatibility and dispersibility, but when coupling active linear polymers , it is difficult to achieve a branched structure with a valence of more than 3, and it is not easy to adjust the content, so it is difficult to adjust the fine structure of the polymer
For such reasons, there is a limit to effectively improving physical properties.

Method used

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  • Method for producing modified conjugated diene polymer and rubber composition using polymer produced by the method
  • Method for producing modified conjugated diene polymer and rubber composition using polymer produced by the method
  • Method for producing modified conjugated diene polymer and rubber composition using polymer produced by the method

Examples

Experimental program
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Effect test

Embodiment 1

[0066] 1) Manufacture of linear SBR

[0067] Put 170g of styrene, 630g of 1,3-butadiene, and 4150g of hexane into a 10L autoclave reactor, add 10ml of tetramethylethylenediamine (TMEDA), and raise the temperature of the reactor while rotating it with a stirrer to 50°C. Butyllithium (BuLi) was placed here, and a linear SBR having a weight average molecular weight (Mw) of about 150,000 g / mol was polymerized through a polymerization reaction. After 10 minutes had elapsed since the reaction temperature reached the highest temperature, 50 g of butadiene was charged, and the terminal end of the polymer was replaced with a butadiene active anion over 5 minutes. Thereafter, ethanol was added as a reaction terminator to terminate the polymerization, and 0.2 wt% of I-1076 was added as an antioxidant to the polymer to prepare a linear SBR solution.

[0068] 2) Manufacture of Dendritic SBR

[0069]Put 170g of styrene, 630g of 1,3-butadiene, and 4150g of hexane into a 10L autoclave reac...

Embodiment 2

[0073] 1) Manufacture of linear SBR

[0074] Put 170g of styrene, 630g of 1,3-butadiene, and 4150g of hexane into a 10L autoclave reactor, add 10ml of tetramethylethylenediamine (TMEDA), and raise the temperature of the reactor while rotating it with a stirrer to 50°C. Butyllithium (BuLi) was placed here, and a linear SBR having a weight average molecular weight (Mw) of about 150,000 g / mol was polymerized through a polymerization reaction. After 10 minutes had elapsed since the reaction temperature reached the highest temperature, 50 g of butadiene was charged, and the terminal end of the polymer was replaced with a butadiene active anion over 5 minutes. Here, fluorobutyllithium (BuLi) in which a modifier diethoxydimethylsilane (diethoxydimethylsilane) was charged at a molar ratio of 1.2 moles was charged, and reacted for 10 minutes. Thereafter, ethanol was added as a reaction terminator to stop the polymerization, and 0.2 wt% of I-1076 was added as an antioxidant to the pol...

Embodiment 3

[0080] 1) Manufacture of linear SBR

[0081] Put 170g of styrene, 630g of 1,3-butadiene, and 4150g of hexane into a 10L autoclave reactor, add 10ml of tetramethylethylenediamine (TMEDA), and raise the temperature of the reactor while rotating it with a stirrer to 50°C. Butyllithium (BuLi) was placed here, and a linear SBR having a weight average molecular weight (Mw) of about 150,000 g / mol was polymerized through a polymerization reaction. After 10 minutes had elapsed since the reaction temperature reached the highest temperature, 50 g of butadiene was charged, and the terminal end of the polymer was replaced with a butadiene active anion over 5 minutes. Here, butyllithium (BuLi) in which a modifier (3-cyanopropyl)dimethylchlorosilane ((3-Cyanopropyl)dimethylchlorosilane) was charged at a molar ratio of 1.2 moles was added and reacted for 10 minutes. Thereafter, ethanol was added as a reaction terminator to terminate the polymerization, and 0.2 wt % of terminator I-1076 was ...

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Abstract

The present invention relates to conjugated diene-based polymer which effectively utilizes solution blending and is used for providing tread raw materials which not only improve storage stability of the products and compatibility with inorganic fillers, but also have sheet workability, low hysteresis loss, and slippage resistance good during rubber composite material production utilizing fillers and vulcanizing agents. More specifically, production of the conjugated diene-based polymer by combining a linear structure the tail end of which is modified into functional groups having good silica mixing performance and dendritic conjugated diene-based macromolecular by utilizing a specific structure and an anionic polymerization technique, low-temperature fluidity during product production can be controlled so as to endow the products with storage stability.

Description

technical field [0001] The present invention relates to a multi-modal conjugated diene polymer, which not only increases the storage stability of the product and the compatibility with the inorganic filler, but also improves the rubber compounding effect of the filler and the vulcanizing agent. A raw material for tire treads that is excellent in the balance of sheet processability, low hysteresis loss, and wet skid property during material production. Background technique [0002] Recently, as interest in environmentally friendly and energy-saving raw materials has increased, modified conjugated diene-based polymer materials in which functional chemical substances have been introduced into diene-based polymers have been used in various ways. Various uses. In particular, there is an increasing demand for the development of raw material technologies for applying such modified conjugated diene-based polymers to automobile tires to improve braking performance and fuel ratio on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L15/00C08L9/06C08F236/10C08F212/08C08C19/44B60C1/00
CPCB60C1/0016C08C19/44C08F236/10C08L15/00C08L2205/02C08F212/08C08L9/06
Inventor 崔准杰李度勋郑镇成金冏河
Owner HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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