A kind of addition type silica gel and its preparation method and application
A technology of addition type and silica gel, which is applied in the field of addition type silica gel and its preparation, can solve the problems affecting the imitation rate of pattern patterns and the curing effect of silica gel, and achieve the effect of good curing effect, low cost and simple preparation method
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Embodiment 1
[0032] 100 parts of a mixture of vinyl silicone oil and hydrogen-containing silicone oil (the number of moles of silicon-hydrogen bonds in hydrogen-containing silicone oil: the number of moles of vinyl groups in vinyl silicone oil = 2.3:1), 25 parts of vinyl MQ liquid silicone resin, and gas phase 13 parts of white carbon black, 8 parts of viscosity modifiers, viscosity is 12mPa.s, 0.8 part of inhibitor, and after mixing 2.5 parts of platinum catalysts, stir 5 minutes under high-speed mixer, the rotating speed of mixer is 2500r / min, obtains viscosity is 800mPa.s addition type silica gel.
[0033] Take the addition-type silica gel, stir at 25°C for 6 minutes, then vacuumize at -0.07mpa for 3 minutes, and then pour it on the surface of the yogi-wrapped model. The pouring time is controlled within 6 minutes.
[0034] After the operation is completed, cure at 25°C for 25 minutes, and observe the degree of curing of the silicone and the simulation degree of the pattern after demoul...
Embodiment 2
[0036] 100 parts of a mixture of vinyl silicone oil and hydrogen-containing silicone oil (the number of moles of silicon-hydrogen bonds in hydrogen-containing silicone oil: the number of moles of vinyl groups in vinyl silicone oil = 2.2:1), 20 parts of vinyl MQ liquid silicone resin, and gas phase 12 parts of white carbon black, 5 parts of viscosity regulator, viscosity is 10mPa.s, 0.7 part of suppressor, and after 2 parts of platinum catalysts are mixed, stir 5 minutes under high-speed mixer, the rotating speed of mixer is 2500r / min, obtains viscosity is 600mPa.s addition type silica gel.
[0037] Take the addition-type silica gel, stir at 24°C for 6 minutes, then vacuumize at -0.07mpa for 2 minutes, and then pour it on the surface of the yogi-wrapped model. The pouring time is controlled within 6 minutes.
[0038] After the operation is completed, cure at 23°C for 30 minutes, observe the degree of curing of the silicone and the simulation degree of the pattern after demouldi...
Embodiment 3
[0040] 100 parts of a mixture of vinyl silicone oil and hydrogen-containing silicone oil (the number of moles of silicon-hydrogen bonds in hydrogen-containing silicone oil: the number of moles of vinyl groups in vinyl silicone oil = 2.4:1), 30 parts of vinyl MQ liquid silicone resin, and gas phase 14 parts of white carbon black, 10 parts of viscosity regulator, viscosity is 15mPa.s, 0.9 part of suppressor, and after 3 parts of platinum catalysts are mixed, stir 5 minutes under high-speed mixer, the rotating speed of mixer is 2500r / min, obtains viscosity is 1000mPa.s addition type silica gel.
[0041] Take the addition-type silica gel, stir at 23°C for 6 minutes, then vacuumize at -0.07mpa for 3 minutes, and then pour it on the surface of the yogi-wrapped model. The pouring time is controlled within 7 minutes.
[0042]After the operation is completed, cure at 24°C for 20 minutes, and observe the degree of curing of the silicone and the simulation degree of the pattern after dem...
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