Synthetic Formulation of Ice Feeling Silicone Oil
Smooth crude oil generally use linear body as raw material. First, pump the linear body into the kettle, turn on the stirring, add piperazine-based coupling agent, coupling agent generally do not need to be hydrolyzed, raise the temperature to 70-80 ℃, add the catalyst, catalyst for tetramethylammonium hydroxide, potassium hydroxide, lithium hydroxide, according to the viscosity of the different catalysts, choose different catalysts, the addition of the amount of one ten thousandth of a percent or so. Continue to raise the temperature to 110-120 ℃, hold for 1 hour, vacuum, vacuum time depends on the viscosity of the oil, generally 10-60 minutes. After the viscosity of the oil meets the requirements, cool to below 80 ℃ out of the material, standby.
Production of silicone oil
Loose type crude oil generally use D4 or DMC as raw material. The production method of making amino silicone oil with D4 or DMC is:
1、Hydrolysis of coupling agent
First, put 100kg of piperazine-based coupling agent into the reactor, add 20kg of deionized water, turn on the stirring, open the exhaust valve of the receiver, raise the temperature, to 80 ℃, turn on the cooling water of the condenser, and continue to raise the temperature to 130 ℃, close the exhaust valve, turn on the vacuum, and in the process of pumping the vacuum, raise the temperature of the material to 150 ℃, cool it to less than 80 ℃, discharged and weighed.
Yield = weight after dehydration/input quantity (generally at 0.8)
2、Synthesis of amino silicone oil
200kg of DMC pumped into the reactor, warmed to 80 ℃, add (20g potassium hydroxide + 180g water), warmed to 145 ~ 150 ℃, hold 1 hour, measured viscosity in 2000 ~ 5000 CP. do not need to cool down, add thoroughly hydrolyzed piperazine-based coupling agent, such as doing 0.6N (12kg * yield), and then make up for the addition of potassium hydroxide (20g potassium hydroxide +) 20g water ), at 145+150℃, hold for 1 hour, viscosity above 5000. Can be cooled to below 80 ℃, if the viscosity requirements of high material can be in the cooling before the vacuum reaction, pumping to the required viscosity. If the viscosity requirement is small, you can add MM or MDM capping agent before cooling, and then make up the catalyst, the viscosity will be reduced.
The oils produced with D4 or DMC are: 0.6N viscosity of 5000 to 1000 CP, 0.9N viscosity of 1000 CP.
Production of Ice Feeling Silicone Oil
Mix all kinds of crude oil in the formula, add emulsifier, stir for 5-10 minutes, add acid water, add glycerin, stir and disperse at high speed for 30-60 minutes, then add the remaining water slowly until all the water is added, adjust the pH value to 5-6, filter and pack.
B、Soft type
Loose and soft type add high ammonia value silicone oil, can not add too much, otherwise the cotton feeling is too strong, the reference formula is as follows:
Emulsification process:
First add 10-20kg of water to the high-speed mixing kettle, add T05, T07, stirring evenly, will be a variety of aminosilicone oil added to the kettle, high-speed mixing for 20 minutes, add glacial acetic acid, and then glycerol several times, high-speed mixing for 40-60 minutes, will slowly add water until all the water is added, adjust the pH value of 6-7, static, filtration, packaging.
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