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A solution-polymerized styrene-butadiene rubber-polyurethane elastomer material for high-performance tires and its preparation method

A technology for solution-polymerizing styrene-butadiene rubber and polyurethane elastomers, which is applied in the field of polymer synthesis, can solve the problems of unsatisfactory high temperature resistance, wet slip gripping ability, etc., achieve excellent dynamic mechanical properties, overcome poor high temperature resistance, The effect of excellent flex resistance

Active Publication Date: 2020-06-09
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The elastomer material of the present invention is based on the synthesis of traditional polyurethane elastomers, introducing hydroxyl-terminated solution-polymerized styrene-butadiene rubber as a soft segment, while maintaining the polyurethane elastomer material itself is environmentally friendly, highly wear-resistant, oil-resistant, chemical-resistant, low On the basis of the advantages of rolling resistance, combined with the excellent flex resistance and excellent dynamic mechanical properties of solution-polymerized styrene-butadiene rubber, the glass transition temperature of polyurethane elastomer is adjusted, which overcomes the poor high temperature resistance and wet skid resistance of existing polyurethane tires The gripping ability is unsatisfactory and other shortcomings, and the overall performance is excellent. The use of the polyurethane material of the present invention to prepare tires is bound to have a broader development space in the tire industry in the future.

Method used

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  • A solution-polymerized styrene-butadiene rubber-polyurethane elastomer material for high-performance tires and its preparation method
  • A solution-polymerized styrene-butadiene rubber-polyurethane elastomer material for high-performance tires and its preparation method
  • A solution-polymerized styrene-butadiene rubber-polyurethane elastomer material for high-performance tires and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The preparation process of the present embodiment polyurethane elastomer is as follows:

[0059] 1) Preparation of dilithium initiator: select cyclohexane and tetrahydrofuran as a solvent, and react with isoprene and metal lithium in an ice-water bath to form a dilithium initiator. Take 70g of lithium flakes with the oxide layer stripped off and 500ml of tetrahydrofuran into a three-necked flask, protect with argon, and place in an ice-water bath to ensure that the temperature is stable at about 0°C. Mix 200ml of isoprene and 500ml of cyclohexane evenly, add it to a constant pressure titration funnel, slowly add it dropwise to a three-necked flask, and fully react with lithium metal. After the dropwise addition was completed, stirring was continued at 0° C. for 6 h. After the reaction was completed, it was left to stand at low temperature for 24 hours. Filter the upper clarified reaction solution with a G4 sand core funnel to obtain a brown-red transparent initiator s...

Embodiment 2

[0065] The preparation process of the present embodiment polyurethane elastomer is as follows:

[0066] 1) Preparation of dilithium initiator: select cyclohexane and tetrahydrofuran as a solvent, and react with isoprene and metal lithium in an ice-water bath to form a dilithium initiator. Take 60g of lithium flakes stripped of the oxide layer and 500ml of tetrahydrofuran into a three-necked flask, protect with argon, and place in an ice-water bath to ensure that the temperature is stable at about 0°C. Mix 200ml of isoprene and 500ml of cyclohexane evenly, add it to a constant pressure titration funnel, slowly add it dropwise to a three-necked flask, and fully react with lithium metal. After the dropwise addition was completed, stirring was continued at 0° C. for 6 h. After the reaction was completed, it was left to stand at low temperature for 24 hours. Filter the upper clarified reaction solution with a G4 sand core funnel to obtain a brown-red transparent initiator solutio...

Embodiment 3

[0072] The preparation process of the present embodiment polyurethane elastomer is as follows:

[0073] 1) Preparation of dilithium initiator: select cyclohexane and tetrahydrofuran as a solvent, and react with isoprene and metal lithium in an ice-water bath to form a dilithium initiator. Take 90g of lithium flakes stripped of the oxide layer and 500ml of tetrahydrofuran into a three-necked flask, protect it with argon, and place it in an ice-water bath to ensure that the temperature is stable at about 0°C. Mix 200ml of isoprene and 500ml of cyclohexane evenly, add it to a constant pressure titration funnel, slowly add it dropwise to a three-necked flask, and fully react with lithium metal. After the dropwise addition was completed, stirring was continued at 0° C. for 6 h. After the reaction was completed, it was left to stand at low temperature for 24 hours. Filter the upper clarified reaction solution with a G4 sand core funnel to obtain a brown-red transparent initiator s...

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Abstract

The invention discloses a solution-polymerized styrene-butadiene rubber-polyurethane elastomer material for high-performance tires and a preparation method thereof. The elastomer material is obtained by casting the following materials: a soft segment and a hard segment, the mass ratio of the two is 100:(20-50); the soft segment is a hydroxyl-terminated solution-polymerized styrene-butadiene rubber prepared by anionic polymerization ; The hard segment includes isocyanate, a small molecule polyol chain extender, and a crosslinking agent; the molecular weight of the soft segment is 1000-8000; the glass transition temperature of the soft segment is -20-30°C. The elastomer material of the present invention is based on the synthesis of traditional polyurethane elastomers, introducing hydroxyl-terminated solution polystyrene-butadiene rubber as a soft segment, which adjusts the glass transition temperature of polyurethane elastomers, and overcomes the poor high temperature resistance of existing polyurethane tires. The anti-wet grip ability is not satisfactory and other shortcomings, and the comprehensive performance is excellent.

Description

technical field [0001] The invention relates to the field of polymer synthesis, and more particularly relates to a solution-polymerized styrene-butadiene rubber-polyurethane elastomer material for high-performance tires and a preparation method thereof. Background technique [0002] The tire industry is an industry with a long history and a modern civilization. Since the invention of the pneumatic tire in 1855, after several major technological and theoretical changes, the tire manufacturing technology has been perfected day by day, and its products are widely used in many fields such as transportation. The rapid development of the automobile industry and highways has made tires one of the polymer products with the largest output and the highest technical level. However, social development and environmental issues such as increasingly serious energy consumption, increase in safety accidents, and a large amount of tire solid waste due to short service life have put forward h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/65C08G18/69C08G18/32C08G18/10C08F236/10C08F212/08
CPCC08F236/10C08G18/10C08G18/6588C08G18/69C08G2380/00C08G18/3206C08F212/08C08G18/62B60C1/00C08G18/7671C08G18/7678C08F2/14C08F4/48C08F299/06C08G18/6208C08G81/024C08G18/7621C08K5/56C08L9/06C08L75/04
Inventor 张立群秦璇韩丙勇毛立新吴晓辉刘军张宁董栋
Owner BEIJING UNIV OF CHEM TECH
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