Solid Cosmetic Composition with Structurant and Electrolyte Solution
A water soluble cosmetic or pharmaceutical or pharmaceutical actives in an electrolyte solution which, when impregnated with one or more retentive fillers (such as, for example, silica or hydrophobically modified silica, lamellar filler, crosspolymer, cellulosic, resins, or silicone elastomers) can form stable solid compositions with structurants. Such solid compositions do not require a higher buffer pH or leave residues upon application to the skin. Solid compositions according to the present invention are suitable for cosmetic and pharmaceutical purposes such as antiperspirants, deodorants, lip products, and other topical applications.
1 . A cosmetic or pharmaceutical composition comprising:
one or more cosmetic or pharmaceutical actives in a concentration of about 1% to 60% of the total formula wherein said cosmetic or pharmaceutical active is;
solubilized in an electrolyte solution free of water-absorbing polymers, dipropylene glycol, and emulsifiers and is
impregnated within one or more retentive fillers,
has one or more structurants having a melting point higher than about 50° C.,
and an oil phase selected from the group consisting of organic or silicone compounds or a combination of both such that the oil phase is greater than about 10% w/w and less than about 80% w/w, and
said composition is capable of forming a solid composition.
2 . The composition of claim 1 , wherein the water soluble cosmetic or pharmaceutical active is in a concentration of 15 to 45%.
3 . The composition of claim 1 , wherein the water soluble cosmetic or pharmaceutical active to retentive filler ratio is less than about 142:1.
4 . The composition of claim 1 , wherein the water soluble cosmetic or pharmaceutical active to retentive filler ratio is between about 7:1 and 99:1.
5 . The composition of claim 1 , wherein the retentive filler is selected from the group comprising silica, hydrophobically modified silica, lamellar filler, crosspolymer, cellulosic, resins, silicone elastomers and any combination thereof.
6 . The composition of claim 1 , wherein the one or more structurants are in a concentration of 0.1-50%.
7 . The composition of claim 1 , wherein the oil phase comprises volatile oils, non-volatile oils, or a combination of both.
8 . The composition of claim 1 , wherein the composition optionally includes excipients, pigments, essential oils, natural oils, wash-off agents, preservatives, gums, powders, synthetic ingredients, fragrances, masking agents, high refractive index material, sunscreen and combinations thereof.
9 . The composition of claim 1 , wherein the one or more structurant is selected from the group consisting of waxes, fiber-forming gellants, silicone waxes and combinations thereof.
10 . The Process of preparing the composition of claim 1 comprising:
a. add active and silica powder;
b. optionally mix and add a portion of (a) to the oil phase;
c. add (b) to the structurant and optionally cool;
d. reheat (c) and add the remaining (a);
e. optionally add additional ingredients; and
f. heat (e) until it forms a pourable liquid and pour in molds to obtain a solid composition.
11 . The Process of claim 10 , wherein step (c) is merged with step (b).
12 . The Process of claim 10 wherein step (b) is merged with step (a) and step (d) comprises only reheating.