Claims
- 1. A method for preventing precipitation of zinc pyrithione in an anti-dandruff composition comprising zinc pyrithione, comprising:
- incorporating zinc pyrithione into said composition in solution form obtained by dissolving zinc pyrithione with a zinc pyrithione-dissolving agent represented by formula III: ##STR6## wherein, n is an integer from 10 to 18, in order to increase the solubility of zinc pyrithione.
- 2. The method according to claim 1, wherein said zinc pyrithione-dissolving agent is selected from the group consisting of sodium lauroyl ethylenediaminetriacetate, sodium myristoyl ethylenediaminetriacetate, sodium palmitoyl ethylenediaminetriacetate, sodium stearoyl ethylenediaminetriacetate and sodium cocoyl ethylenediaminetriacetate.
- 3. The method of claim 1, wherein said composition further comprises one or more chelating agents selected from the group consisting of ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, nitrilotriacetic acid, cyclohexanediaminetetraacetic acid, triethanolamine ethylenediaminetetraacetic acid, tetraethylenetriamine, ethylenediamine and diethylenetriamine, or a salt thereof.
- 4. A method for reducing dandruff formation, comprising;
- applying to a subject in need thereof, a composition comprising zinc pyrithione and an effective amount of a zinc pyrithione-dissolving agent represented by formula III: ##STR7## wherein, n is an integer from 10 to 18.
- 5. The method according to claim 4, wherein said zinc pyrithione-dissolving agent is selected from the group consisting of sodium lauroyl ethylenediaminetriacetate, sodium myristoyl ethylenediaminetriacetate, sodium palmitoyl ethylenediaminetriacetate, sodium stearoyl ethylenediaminetriacetate and sodium cocoyl ethylenediaminetriacetate.
- 6. The method of claim 4, wherein said composition further comprises one or more chelating agents selected from the group consisting of ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, nitrilotriacetic acid, cyclohexanediaminetetraacetic acid, triethanolamine ethylenediaminetetraacetic acid, tetraethylenetriamine, ethylenediamine and diethylenetriamine, or a salt thereof.
- 7. A method for stabilizing an anti-dandruff composition comprising zinc pyrithione comprising:
- adding to said composition an effective amount of a zinc pyrithione-dissolving agent represented by formula III: ##STR8## wherein, n is an integer from 10 to 18.
- 8. The method according to claim 7, wherein said zinc pyrithione-dissolving agent is selected from the group consisting of sodium lauroyl ethylenediaminetriacetate, sodium myristoyl ethylenediaminetriacetate, sodium palmitoyl ethylenediaminetriacetate, sodium stearoyl ethylenediaminetriacetate and sodium cocoyl ethylenediaminetriacetate.
- 9. The method of claim 7, wherein said composition further comprises one or more chelating agents selected from the group consisting of ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, nitrilotriacetic acid, cyclohexanediaminetetraacetic acid, triethanolamine ethylenediaminetetraacetic acid, tetraethylenetriamine, ethylenediamine and diethylenetriamine, or a salt thereof.
- 10. An antidandruff composition comprising:
- zinc pyrithione and a zinc pyrithione-dissolving agent represented by formula III: ##STR9## wherein, n is an integer from 10 to 18.
- 11. The composition according to claim 10, wherein said zinc pyrithione-dissolving agent is selected from the group consisting of sodium lauroyl ethylenediaminetriacetate, sodium myristoyl ethylenediaminetriacetate, sodium palmitoyl ethylenediaminetriacetate, sodium stearoyl ethylenediaminetriacetate and sodium cocoyl ethylenediaminetriacetate.
- 12. The composition of claim 10, wherein said composition further comprises one or more chelating agents selected from the group consisting of ethylenediamine-tetraacetic acid, diethylenetriaminepentaacetic acid, nitrilotriacetic acid, cyclohexanediaminetetraacetic acid, triethanolamine ethylenediaminetetraacetic acid, tetraethylenetriamine, ethylenediamine and diethylenetriamine, or a salt thereof.
Priority Claims (4)
Number |
Date |
Country |
Kind |
97-2207 |
Jan 1997 |
KRX |
|
97-2208 |
Jan 1997 |
KRX |
|
97-9984 |
Mar 1997 |
KRX |
|
97-17380 |
May 1997 |
KRX |
|
Parent Case Info
This application is a continuation of application Ser. No. 09/100,753, filed Jun. 22, 1998 abandoned; which is a divisional of Ser. No. 08/861,720, filed May 22, 1997 now U.S. Pat. No. 5,886,031.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3236733 |
Karsten |
Feb 1966 |
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Foreign Referenced Citations (1)
Number |
Date |
Country |
268 911 |
Jun 1988 |
EPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
861720 |
May 1997 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
100753 |
Jun 1998 |
|