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Conjugated diene-vinyl aromatic copolymer

A technology based on aromatic hydrocarbon copolymers and vinyl aromatic hydrocarbons, which is applied in the field of polymers and can solve problems such as unsatisfactory wet skid resistance

Inactive Publication Date: 2018-11-06
CHI MEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the above-mentioned conjugated diene-vinyl aromatic copolymer is used to manufacture tires, it cannot meet the requirements of wet skid resistance.

Method used

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  • Conjugated diene-vinyl aromatic copolymer
  • Conjugated diene-vinyl aromatic copolymer
  • Conjugated diene-vinyl aromatic copolymer

Examples

Experimental program
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Effect test

Embodiment 1

[0051] First, 800 grams of cyclohexane was added into the reaction tank as a solvent, and maintained at 45°C. Next, 2,2-bis(2-tetrahydrofuryl)propane (2,2-ditetrahydrofurylpropane, DTHFP) was added into the reaction tank as a microstructure regulator. Then add 0.2 g of n-butyl lithium into the reaction tank as an initiator for polymer polymerization. Here, the molar ratio of the microstructure modifier to the initiator is substantially about 2:1. Then take 40.3 grams (0.387mole) of styrene (Styrene) and 4.46 grams of 4-tert-butylstyrene (p-tert-butyl styrene), 168.3 grams (3.11mole) of 1,3-butadiene (1 , 3-Butadiene) into the reaction tank for polymer polymerization. After polymer polymerization, a copolymer with living ends can be prepared. At this time, take samples and add antioxidant to terminate the reaction. After removing the solvent, the conjugated diene-vinyl aromatic copolymer of the present invention is obtained, and the vinyl (1,2) structure in the polymer is me...

Embodiment 2～9、 comparative example 1、2

[0054] The preparation methods of Examples 2-9 and Comparative Examples 1 and 2 are similar to Example 1, the difference lies in the amount of 4-tert-butylstyrene used. Among them, what are prepared in Examples 1 to 9 are conjugated diene-vinyl aromatic copolymers added with 4-tert-butyl styrene and conjugated diene-vinyl aromatic copolymers with terminal modification. Comparative example 1 is a conjugated diene-vinyl aromatic copolymer without 4-tert-butylstyrene and a terminal-modified conjugated diene-vinyl aromatic copolymer, and Comparative Example 2 is a conjugated diethylene-vinyl aromatic copolymer without styrene. Diene-vinyl aromatic copolymers and end-modified conjugated diene-vinyl aromatic copolymers. The styrene monomer unit and 4-tert-butyl The weight percentages of styrene monomer units are listed in Table 1 below.

[0055] Next, the glass transition temperatures of the conjugated diene-vinyl aromatic copolymers and the terminal-modified conjugated diene-viny...

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Abstract

A conjugated diene-vinyl aromatic hydrocarbon copolymer including a conjugated diene series monomer unit and a vinyl aromatic hydrocarbon series monomer unit is provided. The vinyl aromatic hydrocarbon series monomer unit includes a styrene series monomer unit and a monomer represented by the chemical formula (1) unit: R is an alkyl group having 3-7 carbon atoms. Based on the total 100 wt% of the styrene series monomer unit and the monomer represented by the chemical formula (1) unit, the content of the styrene series monomer unit is from 5 wt% to 90 wt%, and the content of the monomer represented by the chemical formula (1) unit is from 10 wt% to 95 wt%. The glass transition temperature of the conjugated diene-vinyl aromatic hydrocarbon copolymer is between -17.6 and -21.5 DEG C.

Description

technical field [0001] The invention relates to a polymer, in particular to a conjugated diene-vinyl aromatic hydrocarbon copolymer. Background technique [0002] Conjugated diene-vinyl aromatic copolymers can be used to make tires, so properties such as rolling resistance and wet skid resistance are important for energy saving and driving safety. Existing tires usually add carbon black to the conjugated diene-vinyl aromatic copolymer to increase the strength of the tire. However, due to the gradual depletion of petroleum energy and global warming in recent years, the tire industry has begun to develop white smoke Replace carbon black in order to improve the rolling resistance of tires and reduce energy loss. However, since white smoke is less likely to be uniformly dispersed in conjugated diene-vinyl aromatic copolymers than carbon black, it is necessary to try to improve the compatibility of white smoke and conjugated diene-vinyl aromatic copolymers. [0003] An improved...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F236/10B60C1/00
CPCY02T10/86
Inventor 戴嘉宏谢官霖郭纮睿
Owner CHI MEI CORP
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