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Preparation method of styrene-butadiene rubber and styrene-butadiene rubber

A styrene-butadiene rubber and latex technology, applied in the rubber field, can solve the problems of high tensile strength requirement, tensile strength less than 32MPa, unsatisfactory, etc., and achieves the effects of low price, reduced production cost and simple preparation method

Active Publication Date: 2021-11-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the embodiments of the present invention is to provide a preparation method of styrene-butadiene rubber and styrene-butadiene rubber, which can solve the problem that the tensile strength cannot reach 32MPa and cannot meet the requirements of replacing natural rubber, and then be applied to conveyor belts and other objects. Problems with rubber products requiring high tensile strength

Method used

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  • Preparation method of styrene-butadiene rubber and styrene-butadiene rubber

Examples

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preparation example Construction

[0031] In the first aspect, the embodiment of the present invention also provides a preparation method of styrene-butadiene rubber, the preparation method comprising:

[0032] 180-200 parts by weight of deionized water, 3.5-5.0 parts by weight of emulsifier, 0.62-1.04 parts by weight of buffer, 0.05-0.1 parts by weight of activator, 0.10-0.20 parts by weight of molecular weight regulator, 64- Add 68 parts by weight of butadiene and 32 to 36 parts by weight of styrene into the polymerization tank and stir evenly, and control the temperature of the polymerization tank to drop to a preset temperature, and add 0.02 to 0.1 parts by weight of an initiator to make butadiene and Styrene polymerizes.

[0033] When the conversion rate of butadiene and styrene reaches 60%-65%, 0.35-0.5 parts by weight of a terminator is added to terminate the polymerization reaction to obtain styrene-butadiene rubber latex.

[0034] Adding styrene-butadiene rubber latex into sulfuric acid solution with ...

Embodiment 1

[0067] The present embodiment provides a kind of styrene-butadiene rubber, and this styrene-butadiene rubber is prepared by the following method: vacuumize the polymerization kettle, then 190 parts by weight of deionized water, 4.5 parts by weight of disproportionated potassium abietate soap, 0.2 parts by weight phosphoric acid, 0.3 parts by weight of potassium hydroxide, 0.03 parts by weight of EDTA tetrasodium salt, 0.1 parts by weight of sodium dodecylbenzenesulfonate, 0.01 parts by weight of ferrous sulfate, 0.03 parts by weight of formaldehyde Sodium bisulfite, 0.025 parts by weight of ethylenediaminetetraacetic acid tetrasodium salt, 0.105 parts by weight of tertiary dodecyl mercaptan, 68 parts by weight of butadiene, and 32 parts by weight of styrene are added to the polymerization kettle, and stirred evenly . The temperature of the polymerization tank was controlled at 5° C., and 0.05 parts by weight of p-menthane hydrogen peroxide was added into the reaction tank to c...

Embodiment 2

[0069]This embodiment provides a kind of styrene-butadiene rubber, and this styrene-butadiene rubber is prepared by the following method: vacuumize the polymerization kettle, then add 185 parts by weight of deionized water, 4.7 parts by weight of fatty acid sodium soap, and 0.21 parts by weight of hydrochloric acid , 0.32 parts by weight of sodium hydroxide, 0.02 parts by weight of EDTA tetrasodium salt, 0.1 parts by weight of sodium dodecylbenzenesulfonate, 0.01 parts by weight of ferrous sulfate, 0.03 parts by weight of formaldehyde sulfoxylate Sodium hydrogen, 0.025 parts by weight of tetrasodium ethylenediaminetetraacetic acid, 0.20 parts by weight of tertiary dodecyl mercaptan, 66 parts by weight of butadiene, and 34 parts by weight of styrene were added to the polymerization tank and stirred evenly. The temperature of the polymerization tank was controlled at 4° C., and 0.06 parts by weight of p-menthane hydrogen peroxide was added into the reaction tank to cause the poly...

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Abstract

The invention discloses a preparation method of styrene-butadiene rubber and the styrene-butadiene rubber, belonging to the field of rubber. The styrene-butadiene rubber is prepared by the following method: 180-200 parts by weight of deionized water, 3.5-5.0 parts by weight of emulsifier, 0.62-1.04 parts by weight of buffer, 0.05-0.1 parts by weight of activator, 0.10-0.20 parts by weight Parts by weight of molecular weight regulator, 64-68 parts by weight of butadiene, and 32-36 parts by weight of styrene are added to the polymerization tank and stirred evenly, and the temperature of the polymerization tank is controlled to drop to the preset temperature, and 0.02-0.1 parts by weight of Initiator to make butadiene and styrene polymerize; when the conversion rate of butadiene and styrene reaches 60% to 65%, add 0.35 to 0.5 parts by weight of terminator to terminate the polymerization reaction to obtain styrene-butadiene rubber Latex: adding styrene-butadiene rubber latex to sulfuric acid solution with a mass percentage of 0.3% to 0.8%, stirring to obtain coagulation, washing and drying the coagulation to obtain styrene-butadiene rubber. The tensile strength of the styrene-butadiene rubber is above 32MPa, which can replace natural rubber.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a preparation method of styrene-butadiene rubber and the styrene-butadiene rubber. Background technique [0002] Styrene-butadiene rubber (English name Styrene, 1,3-butadiene polymer, abbreviated as SBR) is one of synthetic rubbers, which can be prepared by emulsion polymerization with low production cost and simple production process. The output and consumption of styrene-butadiene rubber are large, and it is widely used in the production of industrial and civil products. However, styrene-butadiene rubber is a non-self-reinforcing rubber, which cannot play a reinforcing role when it is stressed, and its factory index requires a tensile strength greater than 24MPa. Natural rubber is a self-reinforcing rubber. When stretched, the macromolecular chains will be oriented along the stress direction to form crystals, and the crystal grains play a reinforcing role. Under the standard formula, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F236/10C08F212/08C08F2/38
Inventor 侯军殷兰郭睿达庞建勋孙继德李永茹王秀芝石捷强刘宏伟
Owner PETROCHINA CO LTD