Aqueous cosmetic preparation for skin
一种化妆品、皮肤的技术,应用在水性皮肤化妆品或水包油型乳化皮肤化妆品领域,能够解决乳化剂发粘感、配方构成制约等问题,达到适应性良好、紧致感优异的效果
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[0161] Next, examples are given below to describe the present invention in detail. The present invention is not limited to the following examples. The blending amount is expressed in mass % unless otherwise specified.
[0162] First, a synthesis example of the microgel constituting the thickener used in the present invention will be described. The microgel obtained in the synthesis example is a thickener composed of microgel of the component (B) used in the present invention.
Synthetic example 1
[0164] 40 g of dimethylacrylamide (manufactured by Kojin) and 9 g of 2-acrylamide-2-methylpropanesulfonic acid (manufactured by Sigma) were dissolved in 250 g of ion-exchanged water, and the pH was adjusted to 7.0 with sodium hydroxide. In a 1000ml three-necked flask equipped with a reflux device, add 250g of n-hexane, polyoxyethylene (3) oleyl ether (EMALEX 503, manufactured by Japan Emulsion) 8.2g and polyoxyethylene (6) oleyl ether (EMALEX 506, manufactured by Japan Emulsion) 16.4g, mix and dissolve and carry out N 2 replacement. Add monomer aqueous solution in this three-necked flask, under N 2 While stirring under the atmosphere, it was heated to 65°C to 70°C with an oil bath. When the temperature of the system reaches 65° C. to 70° C., after confirming that the system is in a translucent microemulsion state, 2 g of ammonium persulfate is added to the polymerization system to initiate polymerization. The polymerization system was maintained at 65°C to 70°C for 3 hours ...
Synthetic example 2
[0166] 35 g of dimethylacrylamide (manufactured by Kohjin) and 17.5 g of 2-acrylamide-2-methylpropanesulfonic acid (manufactured by Sigma) were dissolved in 260 g of ion-exchanged water and adjusted to pH=7.0 with sodium hydroxide. In a 1000ml three-neck flask equipped with a reflux device, add 260g of n-hexane, polyoxyethylene (3) oleyl ether (EMALEX 503, manufactured by Japan Emulsion) 8.7g and polyoxyethylene (6) oleyl ether (EMALEX 506, manufactured by Japan Emulsion) 17.6g, mix and dissolve and carry out N 2 replacement. Add monomer aqueous solution in this three-necked flask, under N 2While stirring under the atmosphere, it was heated to 65°C to 70°C with an oil bath. When the temperature of the system reaches 65° C. to 70° C., after confirming that the system is in a translucent microemulsion state, 2 g of ammonium persulfate is added to the polymerization system to initiate polymerization. The polymerization system was maintained at 65°C to 70°C for 3 hours while st...
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