Claims
- 1. An essentially anhydrous, hydrophobic, substantially pigment free, homogeneous and stable carier gel, free of synthetic oils, consisting essentially of a minor proportion by weight of a waxy solid and a major proportion by weight of a naturally occurring vegetable oil, the gel having particles of waxy solid in a size range from about 0.1 μm to 10 μm homogeneously distributed as a disperse phase the gel having a viscosity in the range from 10,000 cP at 25° C. measured with a T-A bar at 0.5 rpm, to about 100,000 cp at 25° C. measured with a T-F bar at 0.1 rpm, each measured with a Brookfield Model DV-II+ Viscometer on a Model D Helipath stand, the gel being stable for at least 30 days when confined in a container in an air atmosphere at 40° C. at substantially sea level.
- 2. The carrier gel of claim 1 wherein the vegetable oil includes from 0 to 15% by weight of a hydrogenated vegetable oil.
- 3. The carrier gel of claim 1 wherein the vegetable oil is present in an amount in the range from about 55% to 95%, and the waxy solid is present in an amount in the range from about 5% to 40%.
- 4. The carrier gel of claim 3 wherein the vegetable oil is present in an amount in the range from about 60% to 90% by weight of the gel, and the waxy solid is present in an amount in the range from about 10% to 25%.
- 4. A method for preparing a carrier gel, comprising,
heating a mixture of a minor proportion by weight of a waxy solid and a major proportion by weight of a naturally occurring vegetable oil to a temperature above the melting point of the waxy solid but below a temperature at which either of the components is degraded; cooling the mixture to a temperature below about 38° C. (100° F.) to form a slurry having an initial viscosity in the range from about 2,000 cp to 50,000 cp at 25° C.; continuously mixing the slurry with sufficient energy to raise the temperature at least 5° C. to form a rheopectic mass and simultaneously cooling the mass to a temperature below 49° C. (120° F.); thereafter cooling the rheopectic mass to ambient temperature; and, recovering a cool and stable carrier gel having no visible slump at 30° C. for a period of 24 hr, and a viscosity in the range from 10,000 cP at 25° C. measured with a T-A bar at 0.5 rpm, to about 100,000 cP at 25° C. measured with a T-F bar at 0.1 rpm, each measured with a Brookfield Model DV-II+ Viscometer on a Model D Helipath stand.
- 5. The method of claim 4 wherein the cool and stable gel is held open to the atmosphere for at least 8 hr to enhance the stability of the gel.
- 6. The method of claim 4 including heating the mixture to a temperature from about 5° C. to 20° C. above the melting point of the waxy solid; and, wherein the vegetable oil is present in an amount in the range from about 55% to 95%, and the waxy solid is present in an amount in the range from about 5% to 45%.
- 7. An emollient carrier gel produced by
heating a mixture of a minor proportion by weight of a waxy solid and a major proportion by weight of a naturally occurring vegetable oil to a temperature above the melting point of the waxy solid but below a temperature at which either of the components is degraded; cooling the mixture to a temperature below about 38° C. (100° F.) to form a slurry having an initial viscosity in the range from about 2,000 cp to 50,000 cp at 25° C.; continuously mixing the slurry with sufficient energy to raise the temperature at least 5° C. to form a rheopectic mass and simultaneously cooling the mass to a temperature below 25 49° C. (120° F.); thereafter cooling the rheopectic mass to ambient temperature; and, recovering a cool and stable carrier gel having no visible slump, a viscosity in the range from 10,000 cP at 25° C. measured with a T-A bar at 0.5 rpm, to about 100,000 cP at 25° C. measured with a T-F bar at 0.1 rpm and a Brookfield Model DV-II+ Viscometer on a Model D Helipath stand.
- 8. The carrier gel of claim 7 wherein the cool and stable gel is held open to the atmosphere for at least 8 hr to enhance the stability of the gel.
- 9. The carrier gel of claim 7 including heating the mixture to a temperature from about 5° C. to 20° C. above the melting point of the waxy solid; and, wherein the vegetable oil is present in an amount in the range from about 55% to 95%, and the waxy solid is present in an amount in the range from about 5% to 45%.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation-in-part of copending application Ser. No. 10/436,555 filed May 13, 2003, which is a continuation of copending application Ser. No.10/126,414 filed Apr. 19, 2002 now abandoned, which is a continuation-in-part application of Ser. No. 09/994,416 filed Nov. 27, 2001, now abandoned.
Continuations (1)
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Number |
Date |
Country |
Parent |
10126414 |
Apr 2002 |
US |
Child |
10436555 |
May 2003 |
US |
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
10436555 |
May 2003 |
US |
Child |
10661656 |
Sep 2003 |
US |
Parent |
09994416 |
Nov 2001 |
US |
Child |
10126414 |
Apr 2002 |
US |