High transparent organic silica gel for high temperature resistant LED (light-emitting diode)
An organic silica gel, high temperature resistant technology, used in non-polymer organic compound adhesives, adhesives, non-polymer adhesive additives, etc., can solve the problem of poor heat resistance and oxidation resistance, complex product synthesis steps, It is difficult to solve problems such as overall performance, and achieve the effect of improving coating and bonding effect, stable and reliable refractive index, and good heat resistance.
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Embodiment 1
[0040] A high-transparency organic silica gel for high-temperature-resistant LEDs, comprising the following components in parts by weight: 100 parts of methyl vinyl silicone rubber, 40 parts of methyl-terminated polybisphenylmethylsilazane, vinyl trimethoxy 10 parts of base silane, 4 parts of 1-ethynyl-1-cyclohexanol, and 0.2 parts of isopropanol solution of chloroplatinic acid with a platinum content of 5000 ppm.
[0041] The methyl-terminated polybisphenylmethylsilazane is prepared through the following steps:
[0042] S1, in parts by mass, add 1 part of diphenyldichlorosilane to the reaction kettle, add 6 parts of toluene into the reaction kettle, stir and feed ammonia gas until it is not absorbed, and test that the reaction solution is alkaline with pH test paper, Stop the reaction after maintaining the ammonia gas state at 11°C for 1 hour;
[0043] S2, add ammonia water at 13°C and stir until there is no visible solid in the solution, dehydrate and separate to obtain the...
Embodiment 2
[0055] A high-transparency organic silica gel for high-temperature resistant LEDs, comprising the following components in parts by weight: 100 parts of methyl vinyl silicone rubber, 80 parts of methyl-terminated polybisphenylmethylsilazane, vinyl trimethoxy 20 parts of silane, 2 parts of propynyl alcohol, and 0.3 parts of isopropanol solution of chloroplatinic acid with a platinum content of 1000 ppm.
[0056] The methyl-terminated polybisphenylmethylsilazane is prepared through the following steps:
[0057] S1, in parts by mass, add 1 part of diphenyldichlorosilane to the reaction kettle, add 4 to 6 parts of toluene into the reaction kettle, stir and pass ammonia gas until it is not absorbed, and test the reaction solution to be alkaline with pH test paper Afterwards, the reaction was stopped after maintaining the state of feeding ammonia gas for 5 hours at 8°C;
[0058] S2, add ammonia water at 10-13°C and stir until there is no visible solid in the solution, dehydrate and ...
Embodiment 3
[0070] A high-transparency organic silica gel for high-temperature-resistant LEDs, comprising the following components in parts by weight: 100 parts of methyl vinyl silicone rubber, 60 parts of methyl-terminated polybisphenylmethylsilazane, vinyl trimethoxy 40 parts of methyl silane, 2 parts of methyl butynol, and 0.1 part of isopropanol solution of chloroplatinic acid with a platinum content of 10000 ppm.
[0071] The methyl-terminated polybisphenylmethylsilazane is prepared through the following steps:
[0072] S1, in parts by mass, add 1 part of diphenyldichlorosilane to the reaction kettle, add 4 parts of toluene into the reaction kettle, stir and feed ammonia gas until it is not absorbed, and test that the reaction solution is alkaline with pH test paper, Stop the reaction after maintaining the ammonia gas state for 3 hours at 10°C;
[0073] S2, add ammonia water at 11°C and stir until there is no visible solid in the solution, dehydrate and separate to obtain the oil ph...
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