Method for improving stability of organic silicon emulsion
A technology of silicone emulsion and stability, applied in the field of fine chemical preparations, can solve the problem that the emulsification efficiency of the emulsifier needs to be further improved, and achieve the effect of improving the emulsification efficiency and improving the function
Inactive Publication Date: 2019-09-20
南京澳莉峰环保科技有限公司
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0003] At present, the use of silicon polyether, sorbitan polyether derivatives, alkylphenol polyether derivatives, etc. as emulsifiers to disperse silicone mixtures is the main method, but the emulsification efficiency of these emulsifiers needs to be further improved
Method used
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Embodiment 1
[0042] Preparation of active substances
[0043] Mix 94% of polydimethylsiloxane with a viscosity of 1000mPa.s and 4% of A-200 white carbon black at room temperature, add 2% NaOH, and then keep it at 150°C for 5h, the system Always maintain a negative pressure state in order to remove low molecules. Cool to room temperature to obtain Active A.
Embodiment 2
[0045] Preparation of active substances
[0046] Mix 90% of polydimethylsiloxane with a viscosity of 10,000mPa.s and 7% of A-200 white carbon black at room temperature, add 3% NaOH, and then keep it at 280°C for 6h. Negative pressure is always maintained in the system to remove low molecules. Cool to room temperature to obtain active substance B.
Embodiment 3
[0048] Preparation of active substances
[0049] Mix 95% of polydimethylsiloxane with a viscosity of 500mPa.s and 3% of A-200 white carbon black at room temperature, add 2% NaOH, and then keep it at 80°C for 3h, the system Always maintain a negative pressure state in order to remove low molecules. After cooling to room temperature, active substance C was obtained.
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Abstract
The invention provides a method for improving stability of an organic silicon emulsion. The organic silicon emulsion comprises active substances, high-grade fatty alcohol polyether, an emulsifier and polyether modified polysiloxane. The method comprises the following steps: R1, fully mixing the active substances, the high-grade fatty alcohol polyether, the emulsifier and the polyether modified polysiloxane by stirring for 10-50 minutes, preferably 15-30 minutes; R2, after the R1 is completed, raising the temperature of the system to 55-85 DEG C, then keeping the temperature of the system, slowly adding water, increasing the stirring speed to change the W / O type emulsion into an O / W type emulsion for phase transformation, and continuing adding water until a required mass concentration is achieved, wherein the required mass concentration is generally 40%-70%, and preferably 50-65%; and R3, further emulsifying the crude emulsion in the R2 by a colloid mill, and finally diluting the crude emulsion with thick water to a required emulsion concentration. According to the invention, the high-grade fatty alcohol polyether is added into the mixture when the organic silicon mixture is emulsified, so that emulsifying efficiency of the emulsifier can be greatly improved, and more stable organic silicon emulsion can be obtained, so that the function of the active substances is greatly improved.
Description
technical field [0001] The invention relates to the preparation of fine chemical additives, belongs to the technical field of fine chemical preparation technology, and specifically relates to a method for improving the stability of organic silicon emulsion. Background technique [0002] Silicone emulsion is one of the important silicone products. Due to its unique properties and characteristics, it is widely used in industry, such as papermaking, textile, slurry, coating, construction, leather, medicine, cosmetics, etc. , and the application field is constantly expanding, and the application potential is great. In the above application fields, the use of silicone in the form of water emulsion is the most economical, convenient and safe, and at the same time meets the requirements of environmental protection. The silicone emulsion used in the industrial process is mainly oil-in-water type (O / W). The preparation of O / W silicone emulsion mainly has the following two preparatio...
Claims
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IPC IPC(8): C08J3/03C08L83/04C08L83/12C08L71/02
CPCC08J3/03C08J2383/04C08J2471/02C08J2483/04C08J2483/12
Inventor李飞狄海燕
Owner南京澳莉峰环保科技有限公司