Branched type functionalized solution polymerized styrene-butadiene rubber and preparation method thereof

A solution-polymerized styrene-butadiene rubber and functionalization technology is applied in the field of solution-polymerized styrene-butadiene rubber containing siloxane branched modification and its synthesis, and can solve the problem that the comonomer is expensive and the functionalized solution-polymerized styrene-butadiene rubber is difficult to industrialize. and other problems, to achieve good wet skid resistance, excellent physical and mechanical properties, and improve product performance.
CN110387012AInactive Publication Date: 2019-10-29PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2019-10-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides branched type functionalized solution polymerized styrene-butadiene rubber and a preparation method thereof. A molecular chain of the prepared branched type functionalized solution polymerized styrene-butadiene rubber contains siloxy having good compatibility with white carbon black, a structural diagram is shown as (a), and the siloxane branched chain content is 0.1%-8% ofthe solution polymerized styrene-butadiene rubber by weight. The preparation method of the branched type functionalized solution polymerized styrene-butadiene rubber comprises the steps that organolithium is used as an initiator, a structural modifier is added, so that butadiene and styrene generate copolymerization, when the monomer conversion rate of the copolymerization is close to 100%, long-chain hydrosiloxane is then added, a beta-selective hydrosilylation catalyst and an addition agent are added for hydrosilylation, the reaction temperature is 60-120 DEG C, the reaction time is 30-120 minutes, after the reaction is completed, the branched type functionalized solution polymerized styrene-butadiene rubber is obtained through termination, coagulation and drying. The abrasion performance and wetting resistance of the solution polymerized styrene-butadiene rubber can be improved, and rolling resistance is lowered.
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Description

technical field

[0001] The invention belongs to the technical field of synthetic rubber, and relates to a solution-polymerized styrene-butadiene rubber and a branched modification method thereof, in particular to a solution-polymerized styrene-butadiene rubber containing siloxane branched modification in a molecular chain and a synthesis method thereof. Background technique

[0002] With the development of the automobile industry, the requirements for the performance of synthetic rubber for tires are getting higher and higher. While highlighting the impact of tires on the fuel economy of the vehicle, higher requirements are put forward for the high-speed safety performance of tires. Solution styrene-butadiene rubber (SSBR) has the characteristics of good wet skid resistance and low rolling resistance, and is an ideal material for high-performance tires. The combination of solution polystyrene butadiene rubber and white carbon black can better play the characteristics of high...

Claims

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