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

Active Publication Date: 2014-10-22
SHISEIDO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, when blending them into oil-in-water emulsified skin cosmetics, the compatibility with other oils in the oil phase, such as hydrocarbon oils, ester oils, waxes, etc., must be considered, which limits the formulation composition (For example, refer to Patent Document 2, Patent Document 3)
[0010] Furthermore, when oily components such as siloxanes, esters, and hydrocarbons are blended into a water-based base, emulsification is required, and an emulsifier is required, and the sticky feeling derived from this emulsifier is often a problem

Method used

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  • Aqueous cosmetic preparation for skin
  • Aqueous cosmetic preparation for skin
  • Aqueous cosmetic preparation for skin

Examples

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Embodiment

[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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Abstract

The present invention provides a water-based skin cosmetic comprising the following ingredients (A) and (B) : (A) A compound represented by the following formula (I) (In this formula, 1 and m can be either the same or different; each denotes an integer 10-25.) (B) A thickener composed of microgel obtained by using a composition that has an organic solvent or oil component as the dispersion medium and water as the dispersion phase, dissolving a water soluble ethylenically unsaturated monomer in the dispersion phase, and radically polymerizing it in the dispersion phase, wherein said microgel is obtained by radically polymerizing dimethylacrylamide and 2-acrylamido-2-methylpropane sulfonic acid under the conditions in which single phase microemulsion or fine W / 0 emulsion is formed by using a surfactant.

Description

technical field [0001] The present invention relates to skin cosmetics excellent in usability. More specifically, it relates to water-based skin cosmetics or oil-in-water cosmetics that have good spreadability and adaptability to the skin, no sticky feeling, and extremely excellent feeling of use such as supple feeling, soaking feeling, emollient feeling, firming feeling, etc. Type emulsifying skin cosmetics. Background technique [0002] Conventionally, in skin cosmetics, polyalcohols such as glycerin, 1,3-butanediol, and dipropylene glycol have been mixed as water-based ingredients in order to express a moisturizing richness, smooth spreadability, and emolliency. Then with stearic acid, palmitic acid, myristic acid, behenic acid Higher fatty acids such as acid; waxes such as petrolatum, carnauba wax, candelilla wax, ceresin wax, microcrystalline wax; higher alcohols such as lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol and behenyl alcohol A method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/86A61K8/81A61Q19/00
CPCA61Q19/00A61K8/86A61K8/042A61K8/585A61Q19/02A61K8/8158A61Q19/08A61K8/062A61K8/375
Inventor 大村孝之
Owner SHISEIDO CO LTD
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