Application of amine stabilizer in preparation of hydrophilic silicone oil with stable viscosity and preparation method of hydrophilic silicone oil
A technology of amine stabilizer and hydrophilic silicone oil, which is applied in the field of preparation of hydrophilic silicone oil, can solve problems such as unstable viscosity, achieve the effects of improving appearance, increasing viscosity stability, and reducing dehydrogenation condensation
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Embodiment 1
[0046] The present embodiment relates to a kind of preparation method of hydrophilic silicone oil, specifically comprises the following steps:
[0047] S1, under the protection of nitrogen, add 400g cyclooctamethyltetrasiloxane, 52g high hydrogen-containing silicone oil (hydrogen content is 1.59%), 13g hexamethyldisiloxane and 8g concentrated sulfuric acid into the reactor, React at 40°C for 9 hours, and control the stirring speed at 500r / min. After the reaction was completed, 12 g of sodium carbonate was added to adjust the reaction system to a pH of 6.5, and the reaction system was filtered to obtain the intermediate product low-hydrogen silicone oil F-101 (hydrogen content: 0.18%);
[0048]S2. Under the protection of nitrogen, add 50 g of low-hydrogen silicone oil F-101, 80 g of allyl polyether (Mw=750 g / mol) and 0.04 g of tri-n-butylamine into the reactor, Heat while stirring, when the temperature reaches 80°C, add 0.2g chloroplatinic acid / ethanol solution, control the sy...
Embodiment 2
[0053] The present embodiment relates to a kind of preparation method of hydrophilic silicone oil, specifically comprises the following steps:
[0054] S1, under the protection of nitrogen, add 200g cyclooctamethyltetrasiloxane, 68g high hydrogen-containing silicone oil (hydrogen content is 1.59%), 43g hexamethyldisiloxane and 6g concentrated sulfuric acid into the reactor, React at 40°C for 10 h, and control the stirring speed at 400 r / min. After the reaction, 9g of sodium carbonate was added to adjust the reaction system to a pH of 6.0, and the reaction system was filtered to obtain the intermediate product low-hydrogen silicone oil F-102 (with a hydrogen content of 0.30%).
[0055] S2. Under the protection of nitrogen, add 50g of low-hydrogen silicone oil F-102, 110g of allyl polyether (Mw=500g / mol) and 0.02g of tri-n-butylamine into the reactor, while Heating while stirring, when the temperature reaches 85°C, add 0.4g chloroplatinic acid / isopropanol solution, control the ...
Embodiment 3
[0060] The present embodiment relates to a kind of preparation method of hydrophilic silicone oil, specifically comprises the following steps:
[0061] Under nitrogen protection, add 50g of low-hydrogen silicone oil F-103, 240g of allyl polyether (Mw=950g / mol) and 0.08g of dibutylaminoethanol into the reactor, heat while stirring until the temperature reaches 75°C 0.5g Karstedt / ethanol solution was added, and the temperature of the system was controlled so that it did not exceed 150°C. After 4 hours of reaction, the hydrogen content in the reaction system was detected to be lower than 0.1mL / g, and the reaction was stopped to obtain clear and transparent hydrophilic silicone oil S-103.
[0062] Among them, low-hydrogen silicone oil F-103 is a commercially available product, purchased from Dongguan Jiechen Chemical Co., Ltd., AA-201, with a hydrogen content of 0.40%.
[0063] Divide the hydrophilic silicone oil S-103 obtained from the reaction into three batches, place them in t...
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