Preparation method of vinyl tris(2-methoxyethoxy)silane coupling agent
A technology of methoxyethoxy and silane coupling agents, applied in chemical instruments and methods, compounds of group 4/14 elements of the periodic table, organic chemistry, etc., can solve the problems affecting the quality of vinyl alkoxysilane products, Recycling solvents consumes a lot of energy, and the catalytic system is complicated, etc., to achieve the effects of good selectivity and stability, reduced requirements, and high catalytic efficiency
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Embodiment 1
[0028] Add 800 g of vinyl tris (2-methoxyethoxy) silane solvents to a self-made three-mouth long-bottomed reaction vessel with a constant pressure dropping funnel, an acetylene air duct with a bubbler, a thermometer and a condenser tube, and then add 800 g of vinyl tris (2-methoxyethoxy) silane solvent, and then add 200 ml of At a flow rate of / min, dry and purified acetylene was introduced and the temperature began to rise slowly. When the system temperature reached 45°C, 40uL of pt(0) divinyltetramethyldisiloxane solution catalyst was added, and the temperature continued to rise until the system temperature reached 85°C At this time, start to drop a total of 400g of tris(2-methoxyethoxy)hydrosilane at a uniform speed, and finish dropping after 6 hours. base) hydrosilane content is 0.32%, stop feeding acetylene and lower the temperature to obtain the reaction crude product. The reaction crude product was distilled under reduced pressure to obtain 441.2 g of vinyl tris(2-metho...
Embodiment 2
[0030] Add 800 g of vinyl tris (2-methoxyethoxy) silane solvents to a self-made three-port long-bottomed reaction vessel with a constant pressure dropping funnel, an acetylene gas guide tube with a bubbler, a thermometer and a condenser tube, and then add 800 g of vinyl tris (2-methoxyethoxy) silane solvent, and then add 170 ml At a flow rate of / min, dry and purified acetylene was introduced and the temperature began to rise slowly. When the system temperature reached 45°C, 60uL of pt(0) divinyltetramethyldisiloxane solution catalyst was added, and the temperature continued to rise until the system temperature reached 90°C At this time, a total of 400 g of tris(2-methoxyethoxy)hydrosilane was added dropwise at a uniform speed, and the drop was completed in 6.5 hours. Oxygen) hydrosilane content is 0.28%, stop feeding acetylene and lower the temperature to obtain the reaction crude product. The reaction crude product was distilled under reduced pressure to obtain 438.5 g of vi...
Embodiment 3
[0032] Add 800 g of vinyl tris (2-methoxyethoxy) silane solvents to a self-made three-port long-bottomed reaction vessel with a constant pressure dropping funnel, an acetylene gas guide tube with a bubbler, a thermometer and a condenser, and then add 800 g of vinyl tris (2-methoxyethoxy) silane solvent, and then add 220 ml At a flow rate of / min, dry and purified acetylene was introduced and the temperature began to rise slowly. When the system temperature reached 45°C, 60uL of pt(0) divinyltetramethyldisiloxane solution catalyst was added, and the temperature continued to rise until the system temperature reached 95°C At this time, a total of 400g of tris(2-methoxyethoxy)hydrosilane was added dropwise at a constant speed, and the drop was completed after 7 hours. base) hydrosilane content is 0.22%, stop feeding acetylene and lower the temperature to obtain the reaction crude product. The reaction crude product was distilled under reduced pressure to obtain 439.7 g of vinyl tr...
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