Oil-extended styrene-butadiene rubber and preparation method thereof
A technology of oil-extended styrene-butadiene rubber and styrene-butadiene rubber, which is applied in the field of rubber, can solve the problems of low rolling resistance, good wear resistance, and inability to meet wet skid resistance at the same time, achieve low rolling resistance, improve wear resistance and Effect of wet skid resistance, excellent abrasion resistance and wet skid resistance
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[0022] As described in the background art, the existing oil-extended styrene-butadiene rubber cannot simultaneously have good wet skid resistance, wear resistance and low rolling resistance. In order to solve the above-mentioned technical problems, the present application provides a preparation method of oil-extended styrene-butadiene rubber, the preparation method further comprises: under vacuum and nitrogen replacement conditions, using styrene, butadiene, a first emulsifier, electrolyte, The initiator, reducing agent, molecular weight regulator and water are used as reaction raw materials to carry out the emulsion polymerization reaction. When the conversion rate of the emulsion polymerization reaction system is 65-70%, a terminator is added to the emulsion polymerization reaction system to obtain styrene-butadiene rubber, wherein , by weight, the reaction raw materials include 35.5-37.5 parts of styrene, 62.5-64.5 parts of butadiene, 4.0-5.5 parts of emulsifier, 0.63-1.03 p...
Embodiment 1
[0037] A preparation method of environment-friendly oil-extended styrene-butadiene rubber, the preparation method comprises the following steps:
[0038] (1) First, carry out vacuum and nitrogen replacement to the polymerization kettle. Add soft water, emulsifier, electrolyte solution, reducing agent, tert-dodecyl mercaptan, styrene and butadiene into the polymerization kettle in turn. When the temperature of the polymerization kettle drops to 5°C, add initiator hydrogen peroxide to the polymerization kettle. alkane, carry out a polymerization experiment, when the conversion rate reaches 70%, add a terminator to terminate the reaction to obtain styrene-butadiene rubber.
[0039] The raw materials used in the emulsion polymerization reaction of the above steps (1) are (by weight): 36 parts of styrene, 64 parts of butadiene, 4.5 parts of emulsifier disproportionated potassium rosinate soap, 0.63 parts of electrolytes, 0.065 parts of hydrogen peroxide to montane (initiator), 0.0...
Embodiment 2
[0045] The difference from Example 1 is:
[0046] The raw materials used in the above-mentioned step (1) emulsion polymerization reaction are (by weight): 35.5 parts of styrene, 64.5 parts of butadiene, 4.6 parts of emulsifier disproportionated potassium rosinate soap, 0.63 parts of electrolytes, 0.065 parts of hydrogen peroxide to Menthane (initiator), 0.065 part of reducing agent, 0.10 part of t-dodecanethiol (molecular weight regulator), 190 parts of water and 0.24 part of terminator.
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