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Liquid oil-in-water composition

A technology for liquid water and composition, applied in the field of liquid oil-in-water composition, can solve the problems of lack of viscosity stability, viscosity over time, instability, etc., achieve excellent emulsion stability, maintain effect, and improve stability Effect

Pending Publication Date: 2021-12-17
KOBAYASHI KOSE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since α-gel is an intermediate phase between lamellar liquid crystals and coagulants, it is generally unstable, and the oil-in-water emulsion compositions containing α-gel obtained by the techniques of the above-mentioned Patent Documents 1 and 2 also have a viscosity change over time. In the case of lack of viscosity stability such as ground rise
In addition, the technologies of the above-mentioned Patent Documents 1 and 2 are based on the thickening action of α-gel to provide emulsion stability. Since the viscosity becomes relatively high immediately after preparation, it is difficult to apply this technology to liquid cosmetics such as lotion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

reference example 1

[0118] Reference Example 1: Preparation of liposome-containing lotion

[0119] A lotion having the composition shown below was prepared by the following preparation method. The obtained lotion was observed with an electron microscope. Electron micrographs are shown in Figure 4 middle.

[0120] Reference example 1: lotion

[0121] (Element) (%)

[0122] 1. Phospholipids 1.0

[0123] 2. Xanthan gum 0.1

[0124] 3. Carboxyvinyl polymer 0.05

[0125]4. 1,3-Butanediol 20.0

[0126] 5. Glycerin 4.5

[0127] 6. Sodium hydroxide 0.02

[0128] 7. Parabens 0.1

[0129] 8. Spices trace

[0130] 9. Purified water balance.

[0131] (Preparation)

[0132] A: liposome part of No. 1, 8 and 9

[0133] B: Mix all remaining ingredients

[0134] C: Mix A and B to obtain lotion.

[0135] image 3 The emulsified droplet having the α-gel film structure of the present invention has an oil phase in the interior, in contrast to this, Figure 4 Liposomes in do not have an oil phase in...

Embodiment 1~14 and comparative example 1~12

[0138] Lotions having the compositions shown in Tables 3 to 6 below were prepared by the following preparation method. For the obtained lotion, the viscosity and emulsification state were evaluated immediately after preparation and after storage at 50° C. for one month according to the following measurement methods and judgment criteria. In addition, the presence of the α-gel film structure covering the emulsified droplet was evaluated by the following method. The results are combined and shown in Tables 3-6. In addition, the numerical value in the composition of Tables 3-6 means %.

[0139] [table 3]

[0140]

[0141] *1 Nikkol SMT (manufactured by Nikko Chemicals Co., Ltd.)

[0142] *2 Amisoft HA-P (manufactured by Kaei Kogyo Co., Ltd.)

[0143] *3 Nikkol DDP-8 (manufactured by Nikko Chemicals Co., Ltd.).

[0144] [Table 4]

[0145]

[0146] [table 5]

[0147]

[0148] [Table 6]

[0149]

[0150]

Embodiment 1、7、8、10

[0152] A: Heat and mix numbers 1~15 evenly to dissolve

[0153] B: Heat and mix numbers 16~19 evenly to dissolve

[0154] C: Add A to B for emulsification and mixing

[0155] D: Cool C, and perform high-pressure dispersion treatment (pressure 200 MPa) twice with a micro-fluidizer to obtain lotion.

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Abstract

The present invention addresses the problem of providing an oil-in-water emulsified composition that is liquid, but has excellent temporal viscosity stability and emulsification stability. The liquid oil-in-water composition according to the present invention as a solution to the problem is characterized by containing components (A)-(C): (A) a straight-chain saturated higher alcohol having 16 or more carbon atoms; (B) at least one anionic surfactant selected from the group consisting of sodium N-stearoyl-N-methyl taurate, and N-stearoyl-L-glutamic acid and salts thereof; and (C) a liquid oil, wherein the molar content ratio (A / B) of the component (A) to the component (B) is 2.8-6, the mass content ratio ((A+B) / C) of the total of the components (A) and (B) to the component (C) is 0.3-0.75, and the average emulsified particle size thereof is 160 nm or less.

Description

technical field [0001] The present invention relates to a liquid oil-in-water composition, and more specifically, to a liquid oil-in-water composition that is excellent in viscosity stability and emulsification stability over time despite being liquid. Background technique [0002] Conventionally, in an oil-in-water composition, when the content of the oil agent is increased, there has been a problem that separation and emulsion stability decrease such as separation and creaming occur over time. On the other hand, it has been attempted to blend a hydrophilic anionic surfactant and a higher aliphatic alcohol at a predetermined molar ratio to form an α-gel with a gel transition temperature of 60° C. or higher (Patent Document 1), or to prepare Mixing a mixture of higher alcohol and anionic surfactant in a specified molar ratio, and mixing a mixture of a water-soluble solvent with a specific IOB value and water in a specified mass ratio to form a bicontinuous microemulsion phas...

Claims

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Application Information

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IPC IPC(8): A61K8/44A61K8/06A61K8/31A61K8/34A61K8/46A61K8/891A61Q19/00
CPCA61Q19/00A61K8/31A61K8/44A61K8/34A61K8/46A61K8/06A61K8/891A61K8/062A61K8/342
Inventor 阿部茜H·早濑
Owner KOBAYASHI KOSE CO LTD
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