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.

Inactive Publication Date: 2019-10-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, comonomers are expensive, there is no large-scale industrial product, and it is dif...

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In a jacketed 10L polymerization kettle, the system was replaced 3 times with nitrogen gas. Add 4088g of hexane, 160g of styrene, 480g of butadiene, and 0.51g of tetrahydrofuran to the polymerization kettle, raise the temperature to 40°C, add 4.3mmol of n-butyllithium, and naturally raise the temperature to 80-100°C. After 2 hours of polymerization, the conversion rate Reach 100%, the number average molecular weight of synthetic linear polymer is 150,000, and molecular weight distribution index is 1.2, adds 89mmol H-Si-(OC 8 h 17 )(C 12 h 25 ) 2 , 1.02mmol Speier catalyst (chloroplatinic acid hydrate) and 0.24mmol trichloroethylene, heated up to 100°C, continued to react for 1 hour, terminated the reaction, added anti-aging agent, discharged, the glue was coagulated by wet method, and dried. The nuclear magnetic test results show that the branched siloxane content accounts for 0.48wt% of the weight of the solution-polymerized styrene-butadiene rubber.

Embodiment 2

[0034] In a jacketed 10L polymerization kettle, the system was replaced 3 times with nitrogen gas. Add 5620g of cyclopentane, 220g of styrene, 660g of butadiene, and 0.38g of tetrahydrofurfuryl ether into the polymerization kettle, raise the temperature to 50°C, add 4.3mmol of n-butyllithium, naturally raise the temperature to 90-100°C, and polymerize for 1 hour Afterwards, conversion ratio reaches 100%, synthetic number average molecular weight is 200,000, and molecular weight distribution index is the linear polymkeric substance of 1.3, adds 85mmol H-Si-(OC 12 h 25 ) 3 , 0.15mmol Wilkinson catalyst (rhodium complex) and 0.11mmol ethylene glycol dimethyl ether, maintain the temperature at 90-100°C, continue the reaction for 1 hour, terminate the reaction, add anti-aging agent, discharge, the glue is coagulated by wet method ,drying. The nuclear magnetic test results show that the branched siloxane content accounts for 1.45% by weight of the solution-polymerized styrene-but...

Embodiment 3

[0038] In a jacketed 10L polymerization kettle, the system was replaced 3 times with nitrogen gas. Add 5620g of cyclohexane, 110g of styrene, 610g of butadiene, 0.51g of tetramethyldivinyldiamine into the polymerization kettle, raise the temperature to 50°C, add 2.9mmol of n-butyllithium, and naturally raise the temperature to 60-70°C , after 1.5 hours of polymerization, the conversion rate reached 100%, adding 0.87mmol tin tetrachloride coupling agent, the number average molecular weight obtained was 350,000, and the molecular weight distribution index was a star-shaped polymer of 1.4, adding 60mmol H-Si-(OC 10 h 21 ) 3 , 0.68mmol Wilkinson catalyst (rhodium complex) and 0.24mmol pyridine, maintain the temperature at 60-70°C, continue the reaction for 1.5 hours, terminate the reaction, add anti-aging agent, discharge, the glue is coagulated by wet method, and dried. The nuclear magnetic test results show that the siloxane branched chain content accounts for 2.42wt% of the w...

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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.

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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Application Information

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IPC IPC(8): C08F236/06C08F212/08C08F8/42
CPCC08F8/42C08F236/06C08F212/08
Inventor 董静宋同江李福崇李旭张华强龚光碧郑聚成李晶梁滔汤海鲲陶惠平丛日新
Owner PETROCHINA CO LTD
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