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Liquid polybutadiene rubber, epoxidized liquid polybutadiene rubber and preparation methods of two

A technology of liquid polybutadiene and butadiene is applied in the field of liquid polybutadiene rubber, epoxidized liquid polybutadiene rubber and its preparation, which can solve the problem of low molecular chain polarity, limited application and difficult performance. Synergy and other problems, to achieve the effect of small dosage, easy molecular weight and simple production process

Active Publication Date: 2018-04-17
SHANDONG YUHUANG CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of polybutadiene carbon chain, the polarity of its molecular chain is very low, it is difficult to be compatible with other polar materials to achieve performance synergy, which limits its application. Epoxidation modification can make polybutadiene rubber overcome the above-mentioned shortcoming

Method used

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Examples

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preparation example Construction

[0017] This embodiment provides a kind of liquid polybutadiene rubber, and its preparation method comprises:

[0018] Step S1: After mixing the polymerization-grade butadiene monomer with an organic solvent, a butadiene monomer solution is obtained.

[0019] Further, organic solvents include weakly polar organic solvents such as toluene and xylene. More preferably, the organic solvent is xylene.

[0020] Step S2: Mix the butadiene monomer solution with an initiator and a telomer at 30-50° C., polymerize at 30-50° C. for 3-5 hours, and terminate the reaction.

[0021] Wherein, the initiator includes at least one of n-butyllithium, sec-butyllithium, tert-butyllithium and isobutyllithium. It is worth noting that, in this embodiment, during the reaction process, this type of butyllithium reagent not only acts as an initiator, but also acts as a miscicide, which can remove impurities such as water and oxygen in the reaction system. The amount of initiator added can be determined...

Embodiment 1

[0037] The present embodiment provides a kind of liquid polybutadiene rubber, and its preparation method comprises:

[0038] After anhydrous and oxygen-free treatment, add 1500mL of xylene and 180g of polymer-grade butadiene monomer into a 3000mL flask, start stirring, and preheat to 40°C in a constant temperature water bath to obtain a butadiene monomer solution .

[0039] In the butadiene monomer solution, add 2.4mL of diethylene glycol dimethyl ether (polarity regulator and heterocidal color developer, according to the molar ratio of diethylene glycol dimethyl ether to Li = 10 to determine diethylene glycol dimethyl ether Adding amount of glycol dimethyl ether), when the solution is slightly yellow, add 0.8mL of the initiator n-butyllithium required for the design molecular weight, and potassium tert-butoxide 2.0mL (according to the mol ratio of K and Li is 1.0, determine the adjustment Adding amount of polymerization agent), continue to react at 40°C for 4h, use ethanol a...

Embodiment 2

[0043] The present embodiment provides a kind of liquid polybutadiene rubber, and its preparation method comprises:

[0044] After anhydrous and oxygen-free treatment, add 1500mL of xylene solution and 180g of polymer-grade butadiene monomer into a 3000mL flask, start stirring, and preheat to 40°C in a constant temperature water bath to obtain butadiene monomer solution.

[0045] In the butadiene monomer solution, add 1.2mL of diethylene glycol dimethyl ether (as a polarity regulator and a heterocidal color developing agent, according to the molar ratio of diethylene glycol dimethyl ether to Li=5 to determine the diethylene glycol dimethyl ether Add-on of ethylene glycol dimethyl ether), when the solution is slightly yellow, add 0.8mL of the initiator n-butyllithium required for the design molecular weight, and potassium tert-butoxide 2.0mL (according to the mol ratio of K and Li is 1.0, determine Adding amount of telomer), continue to react at 40° C. for 4 h, and use methano...

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Abstract

The invention provides liquid polybutadiene rubber, epoxidized liquid polybutadiene rubber and preparation methods of the two and relates to the field of rubber preparation. The preparation method ofthe liquid polybutadiene rubber comprises the following steps: mixing a polymer grade butadiene monomer and an organic solvent, mixing with an initiator and a telomere at the temperature of 30-50 DEGC, carrying out a polymerization reaction at the temperature of 30-50 DEG C for 3-5 hours, and terminating the reaction. According to the method, the liquid polybutadiene rubber can be obtained, and the molecular weight and the structure of the liquid polybutadiene rubber are adjustable. The preparation method of the epoxidized liquid polybutadiene rubber comprises the following steps: mixing theliquid polybutadiene rubber with an organic acid and hydrogen peroxide, and carrying out an epoxidation reaction. The reaction process is simple, the epoxidation process is mild in reaction, and the prepared epoxidized liquid polybutadiene rubber is stable in performance.

Description

technical field [0001] The invention relates to the field of rubber preparation, in particular to a liquid polybutadiene rubber, an epoxidized liquid polybutadiene rubber and a preparation method thereof. Background technique [0002] The concept of "green tires" is gradually rising in today's society. "Green tires" have obvious advantages over traditional tires in terms of energy saving, safety, and environmental protection. Due to the characteristics of polybutadiene carbon chain, the polarity of its molecular chain is very low, it is difficult to be compatible with other polar materials to achieve performance synergy, which limits its application. Epoxidation modification can make polybutadiene rubber overcome the above-mentioned shortcoming. [0003] There have been patents and research reports on the preparation of epoxidized rubber at home and abroad. The patent (CN103910816A) emulsion method prepares the preparation method of epoxidized trans isoprene rubber, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F136/06C08F2/38C08F8/08C08C19/06
CPCC08C19/06C08F8/08C08F136/06C08F2500/02C08F2/38
Inventor 焦俊卿苏忠魁侯红霞王建伟王胜伟
Owner SHANDONG YUHUANG CHEM CO LTD
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