Preparation method for butadiene styrene rubber and butadiene styrene rubber
A technology of styrene-butadiene rubber and butadiene, which is applied in the direction of organic chemistry and can solve the problems of inaccessibility
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[0017] On the one hand, the present invention provides a kind of preparation method of styrene-butadiene rubber, and this method comprises: under the existence of organic solvent and solution polymerization reaction condition, butadiene, styrene are contacted with rare earth catalyst, and in described rare earth catalyst Contain the rare earth complex of structure shown in formula (I):
[0018]
[0019] Among them, R 1 , R 2 and R 3 each independently hydrogen or C 1 -C 20 Hydrocarbyl; R 4 and R 5 each independently hydrogen or C 1 -C 6 The hydrocarbon group; Ln is one of the rare earth metals; THF represents tetrahydrofuran.
[0020] The inventors of the present invention found in research that by specific, R 1 , R 2 , R 3 , R 4 and R 5 A good catalytic effect can be achieved when the rare earth complex formed is used as a component of a catalyst for catalyzing the preparation of styrene-butadiene rubber. Therefore, preferably, in the present invention, R 1 ...
preparation example 1
[0057] This preparation example is used to prepare the rare earth complex described in the present invention.
[0058] At 20°C, the Lu(CH 2 SiMe 3 ) 3 (THF) 2 (17.41g, 0.03mol) was added to 370mL of toluene, and then added dropwise in a solution of 8-(N-2,6-dimethyl)imino 1,2-dihydroquinoline (8.28g, 0.03mol ) in toluene (150mL), reacted at 20°C for 8h, vacuum-dried the toluene to obtain an oily residue, added hexane, filtered to remove the insoluble matter, and added toluene to the oily residue to obtain the rare earth complex Q1;
[0059]Analysis results show:
[0060] FD-Mass: 696.3 (calcd: 696.3)
[0061] Elemental analysis: measured value C: 53.44% by weight, H: 7.04% by weight, N: 4.01% by weight
[0062] Theoretical values C: 53.43%, H: 7.04%, N: 4.02%. It can be seen that the structural formula of the rare earth complex Q1 is:
[0063]
preparation example 2
[0065] This preparation example is used to prepare the rare earth complex described in the present invention.
[0066] At 20°C, Sc(CH 2 SiMe 3 ) 3 (THF) 2 (13.51g, 0.03mol) was added to 370mL of toluene, and then added dropwise in a solution of 8-(N-2,6-dimethyl)imino 1,2-dihydroquinoline (8.28g, 0.03mol ) in toluene (150mL), the reaction solution was reacted at 20°C for 8h, the toluene was vacuum-dried to obtain an oily residue, hexane was added, and the insoluble matter was removed by filtration to obtain the rare earth complex Q2;
[0067] Analysis results show:
[0068] FD-Mass: 566.4 (calcd: 566.3)
[0069] Elemental analysis: measured value C: 65.69% by weight, H: 8.66% by weight, N: 4.92% by weight
[0070] Theoretical value C: 65.69% by weight, H: 8.65% by weight, N: 4.94% by weight.
[0071] It can be seen that the structural formula of the rare earth complex Q2 is:
[0072]
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