Claims
- 1. An external preparation for skin consisting essentially of:
- a quaternary ammonium salt having the formula (I) of: ##STR3## wherein R.sup.1, R.sup.2, and R.sup.3 are alkyl groups having a carbon number from 1 to 6, wherein the total numbers of carbon in R.sup.1, R .sup.2, R.sup.3 and n is 8 or less, and wherein the carbon number of R.sup.1, R.sup.2, R.sup.3 is the same or different; and
- an enhancer for the quaternary ammonium salt, wherein said enhancer improves moisturizing effect of the quaternary ammonium salt,
- wherein said enhancer is selected from the group consisting of at least one of a vitamin E derivative, a vitamin A derivative, and an acrylate alkyl methacrylate copolymer.
- 2. The external preparation according to claim 1, wherein the amount of said quaternary ammonium salt is in the range from 0.1% by weight to 30% by weight with respect to the whole amount of the external preparation.
- 3. The external preparation according to claim 1, wherein the amount of said quaternary ammonium salt is in the range from 0.1% by weight to 20% by weight with respect to the whole amount of the external preparation.
- 4. The external preparation according to claim 1, wherein said vitamin E derivative is at least one selected from the group consisting of tocopherol, vitamin E acetate, vitamin E nicotinate, and .alpha.-tocopherol-2, L-ascorbic acid phosphate diester.
- 5. The external preparation according to claim 4, wherein the amount of said vitamin E derivative is in the range from 0.0001% by weight to 2.0% by weight with respect to the whole amount of the external preparation.
- 6. The external preparation according to claim 4, wherein the amount of said vitamin E derivative is in the range from 0.001% by weight to 0.5% by weight with respect to the whole amount of the external preparation.
- 7. The external preparation according to claim 1, wherein said vitamin A derivative is vitamin A ester.
- 8. The external preparation according to claim 7, wherein the amount of said vitamin A derivative is in the range from 1.times.10.sup.-5 % by weight to 5.0% by weight with respect to the whole amount of the external preparation.
- 9. The external preparation according to claim 7, wherein the amount of said vitamin A derivative is in the range from 1.times.10.sup.-4 % by weight to 0.5% by weight with respect to the whole amount of the external preparation.
- 10. The external preparation according to claim 1, wherein the amount of said acrylate alkyl methacrylate copolymer is in the range from 0.01% by weight to 5.0% by weight with respect to the whole amount of the external preparation.
- 11. The external preparation according to claim 1, wherein the amount of said acrylate alkyl methacrylate copolymer is in the range from 0.05% by weight to 2.0% by weight with respect to the whole amount of the external preparation.
- 12. The external preparation according to claim 1, wherein said quaternary ammonium salt is trimethyl glycine.
Priority Claims (3)
Number |
Date |
Country |
Kind |
7-199103 |
Jul 1995 |
JPX |
|
7-276831 |
Sep 1995 |
JPX |
|
7-276345 |
Sep 1995 |
JPX |
|
Parent Case Info
This application claims the priority of PCT application JP 96/01940, filed on Jul. 12, 1996.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/JP96/01940 |
7/12/1996 |
|
|
4/16/1997 |
4/16/1997 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO97/02803 |
1/30/1997 |
|
|
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Dec 1976 |
|
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Dec 1984 |
|
5384115 |
Bissett et al. |
Jan 1995 |
|
5580549 |
Fukuda et al. |
Dec 1996 |
|
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Number |
Date |
Country |
0 203 750 |
Dec 1986 |
EPX |
06293625A |
Oct 1994 |
JPX |
WO 92 19275 |
Nov 1992 |
WOX |
WO 92 19218 |
Nov 1992 |
WOX |
WO 92 19216 |
Nov 1992 |
WOX |
Non-Patent Literature Citations (2)
Entry |
CTFA Cosmetic Ingredient Dictionary, pp. 271, 374, 1982. |
CA 121: 186797, Uno et al, May 10, 1994. |