Dendritic organosilicon compounds with multiterminal functional groups and preparing method of dendritic organosilicon compounds
A technology of organosilicon compounds and functional groups, applied in the field of dendritic organosilicon compounds and their preparation, can solve problems such as poor repeatability, and achieve the effects of good modifiability, good solubility and clear structure
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[0018] Embodiments of the present invention provide a method for preparing a dendritic organosilicon compound with multi-terminal functional groups, comprising the following steps:
[0019] Step S1, polymethoxysilane (R (4-n) Si(OCH 3 ) n ; R is any one of alkyl and phenyl; n=2,3) and tetramethyldihydrodisiloxane (HSi(CH 3 ) 2 OSi(CH 3 ) 2 H) Mix according to a certain ratio, adjust the pH value to 1 with acid, add a catalyst with a total mass of 2000ppm, react at 50±2°C for 1h to 1.5h, reduce the pressure to 6kPa after the reaction, and distill at 120°C for 2h to obtain terminal silicon hydrogen bonded silicone products (R (4-n) Si(OSi(CH 3 ) 2 h) n ); the acid used to adjust the pH is selected from any of hydrochloric acid, sulfuric acid, glacial acetic acid, etc.; the catalyst is selected from any of p-toluenesulfonic acid, dodecylbenzenesulfonic acid, acetic anhydride or trifluoromethanesulfonic acid.
[0020] Step S2, in a nitrogen atmosphere, combine the silico...
Embodiment 1
[0025] (1) Mix 41.27 g of phenyltrimethoxysilane with 44.80 g of tetramethyldihydrodisiloxane, adjust the pH value to 1 with hydrochloric acid, then add 1.56 g of trifluoromethanesulfonic acid and react at 50°C for 1 hour. After the reaction Reduced pressure to 6kPa and distilled at 120°C for 2h to obtain 59.49g of organosilicon product A with silicon-hydrogen bond;
[0026] (2) In a nitrogen environment, take 33.06g of the silicon-hydrogen bond-terminated organosilicon product A obtained in step (1) and mix it with 88.94g of vinyltrimethoxysilane, and then add 0.1220g of a platinum catalyst to undergo a hydrosilylation reaction, React at 80°C for 5h, after the reaction is over, reduce the pressure to 6kPa and distill at 120°C for 2h to obtain 71.45g 3 ) 3 ) organosilicon product A;
[0027] (3) Mix 31.00 g of the organosilicon product A with multiple methoxy groups at the end obtained in step (2) with 31.44 g of tetramethyldihydrodisiloxane, adjust the pH value to 1 with hy...
Embodiment 2
[0034] (1) Mix 27.20g of methyltrimethoxysilane with 52.49g of tetramethyldihydrodisiloxane, adjust the pH value to 1 with hydrochloric acid, then add 0.24g of trifluoromethanesulfonic acid and react at 50°C for 1h. After the end, reduce the pressure to 6kPa and distill at 120°C for 2h to obtain 40.58g of organosilicon product C with silicon-hydrogen bond;
[0035] (2) In a nitrogen environment, take 24.15g of the silicon-hydrogen bond-terminated organosilicon product C obtained in step (1) and mix it with 60.06g of vinyltrimethoxysilane, then add 0.0675g of a platinum catalyst to undergo a hydrosilylation reaction, React at 90°C for 5h, after the reaction is over, reduce the pressure to 6kPa and distill at 120°C for 2h to obtain 55.86g of 3 ) 3 ) organosilicon product C;
[0036] (3) Take 14.26g of the end obtained in step (2) with multiple methoxy groups (-Si(OCH 3 ) 3 ) organosilicon product C and 15.72g tetramethyldihydrodisiloxane press, adjust the pH value to 1 with ...
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