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Double-terminal functionalized butadiene-isoprene copolymer rubber and preparation method thereof

A technology of isoprene and butadiene, which is applied in the field of new butadiene-isoprene copolymerized rubber and its preparation, can solve the problems that hydroxyl groups cannot react with each other, the degree of functionalization is not high, and there are no public reports. Achieve good end-capping effect and good solubility

Active Publication Date: 2016-10-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Judging from the existing reported technologies, the functionalization of lithium-based polymers is concentrated in solution-polymerized styrene-butadiene rubber, and the synthesis methods of functional groups are mostly prepared by end-capping methods. Due to the high viscosity of the late polymerization system, the degree of functionalization is not high, and the Chlorine impurities create difficulties in solvent refining
The functional group prepared by the functionalized initiator method has a high degree of functionalization, but the commonly used functionalized initiators are tin-lithium, lithium amide, etc., which cannot react with the hydroxyl groups on the surface of silica and form a strong interaction
There is no public report on improving the strength and dynamic mechanical properties of NBR

Method used

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  • Double-terminal functionalized butadiene-isoprene copolymer rubber and preparation method thereof
  • Double-terminal functionalized butadiene-isoprene copolymer rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Under the protection of anaerobic, anhydrous, and argon, add 700ml of hexane and 3mol of metal lithium wire into a 1000ml three-necked flask equipped with a condenser, dropping funnel, and magnetic stirrer, raise the temperature to 50°C, and add Add 1.36 mol of trimethoxy (4-chlorobutoxy) silane solution slowly into the three-necked flask, stir during the dropwise addition and use cold oil to cool down, control the reaction temperature at 50-60°C, dropwise time is 1h, dropwisely add After completion, the constant temperature reaction was continued for 2 h, and the crude product was filtered under an inert atmosphere to obtain a functionalized initiator, and finally an organolithium initiator containing silicon ether was obtained for future use.

[0025] In a jacketed 15L stainless steel polymerization kettle, the system was replaced 3 times with argon gas. Add 6536g of cyclohexane, 900g of butadiene, 100g of isoprene, 0.12g of diethylene glycol dimethyl ether into the p...

Embodiment 2

[0029] Under the protection of anaerobic, anhydrous, and argon, add 700ml of hexane and 3mol of metal lithium wire into a 1000ml three-necked flask equipped with a condenser, dropping funnel, and magnetic stirrer, raise the temperature to 50°C, and add Add 1.36 mol of triethoxy (4-chlorobutoxy) silane solution slowly into the three-necked flask, stir during the dropwise addition and use cold oil to cool down, control the reaction temperature at 50-60°C, dropwise time is 1h, dropwise After the addition was complete, the constant temperature reaction was continued for 2 hours, and the crude product was filtered under an inert atmosphere to obtain a functionalized initiator, and finally an organolithium initiator containing silicon ether was obtained for future use.

[0030] In a jacketed 15L stainless steel polymerization kettle, the system was replaced 3 times with argon gas. Add 6548g of cyclohexane, 800g of butadiene, 200g of isoprene, and 0.08g of tetrahydrofuran into the po...

Embodiment 3

[0034] The preparation of the functionalized catalyst was the same as in Example 1.

[0035] In a jacketed 15L stainless steel polymerization kettle, the system was replaced 3 times with argon gas. Add 6559g of cyclohexane, 700g of butadiene, 300g of isoprene, 0.18g of tetrahydrofuran into the polymerization kettle, add 5.0mmol of n-butyllithium, raise the temperature to 70°C, polymerize for 70min, and add 15mmol of N,N-Dimethylaminobenzaldehyde acetal p-methylaniline was subjected to capping reaction, and the reaction time was 20 minutes. After the end-capping reaction is completed, add 10 g of antioxidant 1010 [tetrakis-(4-hydroxy-3,5-tert-butylphenylpropionic acid) pentaerythritol ester] and stir. The glue is coagulated and dried by wet method.

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Abstract

The invention relates to a macromolecular-chain double-terminal functionalized modified butadiene-isoprene copolymer rubber. According to the invention, a functionalized initiator and an end-capping method are combined, so that the two ends of the molecular chain contain different functional groups at the same time, the two ends have good bonding force with carbon black / white carbon black; one end employs an organic lithium initiator of a protective group, so that the molecular chain contains [-Si-(OR)3], nano dispersion of a filling material in a rubber matrix can be realized; the other end contains a (-NR1R2) group, is good for mutual effect with carbon black, so that the dispersion of carbon black in the rubber matrix can be promoted. At the same time, effect between two ends of the molecular chain and carbon black / white carbon black reduce the free degree of a chain link between a final junction point in the rubber network and chain terminal, elastic recovery of a whole crosslinking network can be effectively joined, energy loss in periodical deformation is reduced, and heat and rolling resistance are improved. The double-terminal functionalized butadiene-isoprene copolymer rubber has excellent low temperature performance, and can increase the strength and dynamic mechanical property.

Description

technical field [0001] The invention belongs to the technical field of synthetic rubber, and relates to a novel butadiene-isoprene copolymer rubber with excellent comprehensive properties, especially high wet skid resistance and low rolling resistance, and a preparation method thereof. Background technique [0002] In recent years, with the development of the automobile industry, the requirements for tire safety have also been continuously improved. The raw materials used in tires are also different according to the seasons. Winter tires are required to be designed for ice and snow roads, which can better avoid skidding during driving. . Butadiene rubber has the lowest glass transition temperature (Tg=-150°C) among synthetic rubbers. However, due to the good flexibility of the molecular chain and no large side groups on the molecular chain, it is easy to crystallize at low temperatures, and the material becomes brittle and loses rubber. flexibility. Therefore, the preparat...

Claims

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Application Information

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IPC IPC(8): C08F236/06C08F236/08C08F4/48C08F8/32C08L9/00
Inventor 董静张华强崔英崔彦君宋同江赵洪国康安福陶惠平龚光碧郑聚成李晶梁滔丛日新
Owner PETROCHINA CO LTD
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