Preparation method of inverse emulsion, thickening agent and emulsifying agent
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An inverse emulsion and emulsifier technology, applied in skin care preparations, cosmetics, pharmaceutical formulations, etc., can solve the problems of non-emulsion emulsification ability disclosure, low operation efficiency, complex process, etc., to achieve emulsified heat storage stability, high intensity effect
Pending Publication Date: 2022-04-15
WANHUA CHEM GRP CO LTD
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[0003] In the prior art, US8668915B2, US7033600B1, and US8765822B2 have disclosed in detail the preparation process of this type of inverse emulsion. Among them, US8668915B2 has detailed restrictions on repeatedly adjusting the pH of the aqueous solution, which is relatively complicated in process and low in operating efficiency; US7033600B1 only fu
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Embodiment 1
[0059] 1) Mix 130g AM, 220g AMPS, 300g AMPS-Na solution, 0.2g MBA, 1g EDTA-2Na, 180g deionized water, neutralize with 50wt% NaOH solution, adjust the pH to 5.5, and obtain the first aqueous solution;
[0060] 2) Mix 13g AM, 0.05g MBA, and 15g deionized water to obtain a second aqueous solution;
[0061] 3) Mix 300g Isopar M and 30g 511 emulsifier, and cool down to 5°C;
[0062] 4) Under stirring conditions, add the aqueous solution of 1) dropwise to the oil phase of 3), add 10 g of 2% SPS aqueous solution at one time, and deoxygenate for 30 minutes;
[0063] 5) 20g of 2% IAA aqueous solution was added dropwise to initiate polymerization, the dropwise addition time was 1h, and the dropwise addition was completed at 70°C for further insulation for 1h;
[0064] 6) Add the second aqueous solution dropwise to the system after the reaction in 5), and according to the above initiation method, add 2g of 2% SPS aqueous solution at one time, remove oxygen for 15 minutes, add dropwise 3...
Embodiment 2-4
[0067] Carry out according to the operation of embodiment 1, relevant material consumption is as shown in table 1.
Embodiment 5
[0069] With the amount of materials in Table 1, carry out according to the following process conditions:
[0070] In step 1), adjust the pH of the first aqueous solution to 7; in step 3), control the temperature of the oil phase to 15°C; in step 5), the time for adding the reducing agent to the first aqueous solution is 2 hours; The temperature is 40° C.; all the other conditions are the same as in Example 1.
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Abstract
The invention discloses a preparation method of an inverse emulsion, a thickening agent and an emulsifying agent. The method comprises the following steps: a, dissolving a hydrophilic nonionic monomer, an acidic monomer and/or salt, a cross-linking agent and a chelating agent in water, and adjusting the pH value to obtain a first aqueous solution; b, dissolving a hydrophilic nonionic monomer and a cross-linking agent in water to obtain a second aqueous solution; c, mixing the oil phase and the water-in-oil emulsifier, and cooling to 5-15 DEG C; d, dropwise adding the first aqueous solution into a product in the step c to form a water-in-oil system, adding an oxidizing agent at one time and removing oxygen, then dropwise adding a reducing agent to initiate polymerization, and preserving heat after polymerization is finished; and e, dropwise adding the second aqueous solution into the product in the step d, adding an oxidizing agent at one time, removing oxygen, dropwise adding a reducing agent for polymerization, preserving heat after polymerization, cooling, adding an oil-in-water emulsifier, filtering and discharging to obtain the inverse emulsion. The inverse emulsion has excellent thickening performance and emulsifying performance, and can be used in the nursing application fields of cosmetic cream and the like.
Description
technical field [0001] The invention relates to a preparation method of an inverse emulsion, as well as a thickener and an emulsifier. Background technique [0002] Thickeners used in cosmetics are used to thicken aqueous phases, or cream-gel systems. In the cream-gel system, especially when a high content of oil is added to the system, a certain amount of emulsifier needs to be added. However, emulsifiers are generally low molecular weight substances, which are less tolerated by the skin than polymers. Therefore, there is a need to develop polymers with both thickening and emulsifying functions. In the current published patent application, it is mentioned that 2-acrylamido-2 methylpropanesulfonic acid (AMPS) and acrylamide (AM) are obtained under the crosslinking action of N, N-methylenebisacrylamide inverse emulsion. The patent US 8668915 B2 discloses in detail the preparation process of this type of inverse emulsion. The emulsion with thickening and emulsification fun...
Claims
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