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A kind of styrene, butadiene, isoprene star copolymer and preparation method thereof

A star-shaped copolymer, isoprene technology, used in tire parts, rolling resistance optimization, transportation and packaging, etc., can solve the problems of unsatisfactory rubber rolling resistance, and achieve good physical and mechanical properties and polymerization conditions. Controllable and improve the effect of comprehensive mechanical properties and dynamic mechanical properties

Active Publication Date: 2011-12-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Synthetic SIBR has good overall performance, but the rolling resistance of rubber is still unsatisfactory

Method used

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  • A kind of styrene, butadiene, isoprene star copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In a jacketed 15L stainless steel reactor, the system was replaced 3 times with argon gas. Add 2241g of cyclohexane, 298g of isoprene, and 0.52g of tetrahydrofuran into the polymerization kettle, add 12.1mmol of n-butyllithium, raise the temperature to 40°C, and polymerize for 80min. Mix 4.66g of tetrahydrofuran, 3480g of cyclohexane, and 57.6g of Press the mixture of ethylene and 518.4g butadiene into the polymerization kettle, control the polymerization temperature at 40°C, continue the reaction for 80min, then press the mixture of 5.18g tetrahydrofuran, 3470g cyclohexane, 230.4g styrene and 345.6g butadiene into the polymerization kettle , the reaction time is 60 minutes, and the polymerization temperature is gradually increased from 40°C to 70°C within 60 minutes, and the temperature is increased by 0.5°C per minute. After the reaction is completed, 336g cyclohexane and 43.2g butadiene are added to the polymerization kettle to continue the reaction for 30 minutes , ...

Embodiment 2

[0032] In a jacketed 15L stainless steel reactor, the system was replaced 3 times with argon gas. Add 3480g of cyclohexane, 576g of isoprene, and 1.02g of tetrahydrofuran into the polymerization kettle, add 24.2mmol of n-butyllithium, raise the temperature to 50°C, polymerize for 60min, and mix 9.33g of tetrahydrofuran, 3018g of cyclohexane, and 38.8g of benzene Press the mixture of ethylene and 349.2g butadiene into the polymerization kettle, control the polymerization temperature at 50°C, continue the reaction for 60min, then press the mixture of 10.37g tetrahydrofuran, 3703g cyclohexane, 105.2g styrene and 370.8g butadiene into the polymerization kettle , the reaction time is 40 minutes, within 40 minutes, the polymerization temperature is gradually increased from 50°C to 80°C, and the temperature is increased by 0.75°C per minute. After the reaction is completed, 336g cyclohexane and 43.2g butadiene are added to the polymerization kettle to continue the reaction for 20 minu...

Embodiment 3

[0036] In a jacketed 15L stainless steel reactor, the system was replaced 3 times with argon gas. Add 3,361g of cyclohexane, 432g of isoprene, and 1.02g of tetrahydrofuran to the polymerization kettle, add 8.1mmol of n-butyllithium, raise the temperature to 60°C, and polymerize for 50min, mix 3.11g of tetrahydrofuran, 2,975g of cyclohexane, and 50.4g of The mixture of ethylene and 332g butadiene was pressed into the polymerization kettle, the polymerization temperature was controlled at 60°C, and the reaction was continued for 50 minutes, and the mixture of 3.46g tetrahydrofuran, 4867g cyclohexane, 93.6g styrene and 532g butadiene was pressed into the polymerization kettle, and the reaction The time is 40 minutes, and the polymerization temperature is controlled to gradually increase from 60°C to 90°C within 40 minutes, and the temperature is raised by 0.75°C per minute. After the reaction is completed, 224g cyclohexane and 28.8g butadiene are added to the polymerization kettle...

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Abstract

The invention provides a star-shaped copolymer of styrene, butadiene and isoprene and a preparation method thereof. The structure of the star-shaped copolymer is described as follows: (-IR-SBR1-SBR2-B3-)nY, wherein Y is Sn or Si; IR is an isoprene homopolymer block; SBR1 is a random copolymer block of styrene and butadiene, wherein the content of styrene is 5-10%; SBR2 is the random copolymer block of styrene and butadiene, wherein the content of styrene is 20-50%; the ratio of SBR1 to SBR2 is (1:1)-(1:2); B3 is terminated butadiene, and n is between 2 and 4; and if the total weight of the monomer is 100%, in the star-shaped copolymer, the content of isoprene is 20-50%, the content of styrene is 10-30%, and the content of butadiene is 20-60%. The copolymer provided by the invention has good properties of natural rubber, cis-butadiene rubber and butadiene-styrene rubber; when the copolymer is applied to treaded rubber of a tyre, the tyre has higher slippery-resisting performance and lower rolling resistance.

Description

technical field [0001] The present invention relates to a star copolymer of styrene, butadiene and isoprene and its preparation method, in particular to a ternary copolymer rubber with excellent comprehensive performance, high wet skid resistance and low rolling resistance and its preparation method. Preparation. Background technique [0002] In recent years, people's requirements for tire rubber have been continuously improved, not only good wet skid resistance and wear resistance, but also lower rolling resistance, so as to meet the needs of energy saving and safety. Studies have shown that there are obvious contradictions among the various properties of various general-purpose tread rubbers. Rubber with low rolling resistance and good wear resistance has poor wet skid resistance, and vice versa. No rubber can meet these comprehensive requirements at the same time. Therefore, this requirement can only be achieved through the combination of various rubber types. This mecha...

Claims

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Application Information

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IPC IPC(8): C08F297/04C08F8/42B60C1/00
CPCY02T10/86
Inventor 董静胡才仲陈红张华强康安福宋同江史工昌崔英龚光碧梁滔李锦山汤海鲲陶惠平怀惠珍周漫
Owner PETROCHINA CO LTD
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