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Preparation method of polyurethane elastomer for engineering tire treads

A polyurethane elastomer, engineering tire technology, used in special tires, tire parts, transportation and packaging, etc., can solve the problems of complex production process, environmental pollution, short life of rubber tires, etc., to achieve simple processing technology, wear resistance, etc. The effect of improving and reducing rolling resistance

Inactive Publication Date: 2012-08-22
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the engineering tires produced in the market generally use rubber as the tread, the life of rubber tires is short, the wear resistance and tear resistance are poor, and the load of rubber engineering tires is limited, and tire blowouts often occur; during production and use A lot of waste is produced, it is difficult to recycle and reuse after scrapping, and it is easy to cause environmental pollution during use; its production process is very complicated, and the investment in production equipment is high

Method used

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  • Preparation method of polyurethane elastomer for engineering tire treads
  • Preparation method of polyurethane elastomer for engineering tire treads
  • Preparation method of polyurethane elastomer for engineering tire treads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The polyurethane elastomer that is used for engineering tire tread is synthesized by two-step method, and the isocyanate radical content of prepolymer is set at 3%, and raw material proportioning is configured by following weight percentage:

[0016]

[0017] The sum of the weight percentages of the above four raw materials is 100%, and the catalyst dibutyltin dilaurate is 0.23% of the total amount of raw materials

[0018] After the ratio of raw materials is selected, the specific production process is carried out:

[0019] First, add polytetrahydrofuran diol into the three-necked flask, heat the oil bath to 125°C, start stirring under vacuum conditions, dehydrate for 2.5 hours, then cool down to 60°C, add the measured MDI, let it heat up naturally for 15 minutes, and heat to 80°C. React at a constant temperature for 2 hours, then take a sample and titrate to measure the -NCO content, stop the reaction when it reaches the preset value, then debubble for 30 minutes u...

Embodiment 2

[0021] The polyurethane elastomer that is used for engineering tire tread is synthesized by two-step method, and the isocyanate radical content of prepolymer is set to 4%, and raw material proportioning is configured by following weight percentage:

[0022]

[0023] The sum of the weight percentages of the above four raw materials is 100%, and the catalyst dibutyltin dilaurate is 0.23% of the total amount of raw materials

[0024] After the ratio of raw materials is selected, the specific production process is carried out:

[0025] First, add polytetrahydrofuran diol into the three-necked flask, heat the oil bath to 130°C, start stirring under vacuum conditions, dehydrate for 2.5 hours, then cool down to 59°C, add the measured MDI, let it heat up naturally for 15 minutes, and slowly heat to 83°C, constant temperature reaction for 2 hours, then sampling and titration to measure -NCO content, the reaction can be stopped when the preset value is reached, and then vacuum degass...

Embodiment 3

[0027] The polyurethane elastomer that is used for engineering tire tread is synthesized by two-step method, and the isocyanate radical content of prepolymer is set to 6%, and raw material proportioning is configured by following weight percentage:

[0028]

[0029] The sum of the weight percentages of the above four raw materials is 100%, and the catalyst dibutyltin dilaurate is 0.23% of the total amount of raw materials

[0030] After the ratio of raw materials is selected, the specific production process is carried out:

[0031] First, add polytetrahydrofuran diol into the three-necked flask, heat the oil bath to 120°C, start stirring under vacuum conditions, dehydrate for 3 hours, then cool down to 65°C, add the measured MDI, let it heat up naturally for 15 minutes, and slowly heat to 75°C ℃, constant temperature reaction for 2.5 hours, and then sample titration to measure -NCO content, the reaction can be stopped when the preset value is reached, vacuum degassing for 4...

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Abstract

The invention discloses a preparation method of polyurethane elastomer for engineering tire treads. The polyurethane elastomer is prepared from polytetramethylene glycol with the relative molecular weight of 2000, polyether triol EP-330N with the relative molecular weight of 4800, MDI (diphenylmethane diisocyanate), 1,4-butanediol and dibutyltin dilaurate. The polyurethane elastomer for the engineering tire treads prepared by the method has the advantages of no pollution, small wear, low rolling resistance and thermogenesis and excellent tearing resistance. Additionally, the tensile strength of the polyurethane elastomer reaches 31Mpa, the elongation at break of the polyurethane elastomer reaches 518%, the wear volume of the polyurethane elastomer reaches 0.0158cm3 (1.61km)-1, and the compression fatigue temperature rise of the polyurethane elastomer is only 9.2 DEG C.

Description

technical field [0001] The present invention relates to the technical category of the preparation of a polyurethane elastomer, in particular, to the technical category of the production and preparation of a polyurethane elastomer used for treads of engineering tires. Background technique [0002] At present, the engineering tires produced in the market generally use rubber as the tread, the life of rubber tires is short, the wear resistance and tear resistance are poor, and the load of rubber engineering tires is limited, and tire blowouts often occur; during production and use A lot of waste is produced, it is difficult to recycle and reuse after scrapping, and it is easy to cause environmental pollution during use; its production process is very complicated, and the investment in production equipment is very high. Polyurethane elastomer is a very special elastomer with a wide range of properties and is a polymer material between plastics and rubber. Compared with rubber, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/32C08G18/48C08G18/10B60C1/00
CPCY02T10/86
Inventor 毛立新付会娟张立群华伟琦张昊
Owner BEIJING UNIV OF CHEM TECH
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