A double-end functionalized butadiene-isoprene copolymer rubber and its preparation method
A technology of isoprene and butadiene is applied in the field of novel butadiene-isoprene copolymerized rubber and its preparation, which can solve the problems of inability of hydroxyl groups to react with each other, low degree of functionalization, high viscosity of the system, etc. To achieve the effect of good end capping and good solubility
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Embodiment 1
[0025] 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.
[0026] 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
[0030] 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.
[0031] 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
[0035] The preparation of the functionalized catalyst was the same as in Example 1.
[0036] 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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