Dispersion composition and cosmetic material
A composition and dispersion technology, which can be used in cosmetics, cosmetic preparations, cosmetic preparations, etc., can solve the problems of insoluble amino acid addition limit and other problems
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[0176] The stirring method and stirring time in the preparation of the acidic aqueous solution are not particularly limited.
[0177] The pH of the acidic aqueous solution is not particularly limited as long as it is less than 7. In order to neutralize the alkaline aqueous solution containing insoluble amino acids and liquid fatty acids, the pH of the acidic aqueous solution is preferably 6.0 or less, more preferably 5.0 or less.
[0178] The nonionic surfactant may be contained in any one of an alkaline aqueous solution, an amino acid-containing liquid, or an acidic aqueous solution, or may be added to the solution after neutralizing the amino acid-containing liquid, preferably after neutralizing the amino acid-containing liquid. added later.
[0179] When adding a nonionic surfactant after neutralization of the amino acid-containing liquid, a surfactant solution containing the nonionic surfactant and the aforementioned aqueous medium can be prepared and added to the neutrali...
Embodiment 1～7、 comparative example 1～4
[0215]
[0216] (Preparation of Amino Acid Containing Liquid)
[0217] The following components were stirred and dissolved at 70° C. for 1 hour to obtain a basic amino acid-containing liquid containing L-cystine and isostearic acid.
[0218]
[0219] (neutralize)
[0220] While stirring the basic amino acid-containing liquid obtained above, 8.33 g of 1 mol / L HCl [acidic aqueous solution] was added to neutralize the amino acid-containing liquid. Hereinafter, the neutralized amino acid-containing liquid is referred to as the L-cystine-containing liquid.
[0221] (Preparation of aqueous surfactant solution)
[0222] The following components were stirred and dissolved at 70° C. for 1 hour to obtain an aqueous surfactant solution.
[0223]Decaglyceryl Isostearate [Nonionic Surfactant] 2.00g
[0224] Glycerin 56.40g
[0225] Pure water 13.24g
[0226] While stirring the L-cystine-containing solution, add the aqueous surfactant solution, and continue stirring until fully m...
Embodiment 8
[0262] [Example 8: Lotion 1]
[0263]
[0264]
[0265] The above (1) was added to (10) and dissolved to obtain an aqueous phase. Next, dissolve (2)-(5) and (7)-(8) in (6), and stir and mix with the previous water phase. Furthermore, (9) was added and stirred and mixed to obtain lotion. The obtained lotion was excellent in transparency, and did not become cloudy even after standing at 50° C. for one month.
[0266] From this, it can be seen that the dispersion composition of this example exhibits very excellent transparency and dispersion stability even when blended into cosmetics.
[0267]
[0268] The following components were dissolved under heating at 70° C. for 1 hour to obtain an aqueous phase composition A.
[0269]
[0270] The following components were melt|dissolved for 1 hour, heating at 70 degreeC, and the oil phase composition A was obtained.
[0271]
[0272] The aqueous phase composition A obtained above was kept at 70°C and stirred (10,000 rpm...
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