Lotion composition for personal use
View Patent ↗This invention relates to emulsion compositions that can warm on contact with ambient moisture and can be used as lubricants on the skin of a person. They may be formulated in the form of a lotion and maintain stability for a significant period of time.
1. A glycol-in-silicone emulsion lubricant composition comprising a discontinuous substantially anhydrous phase dispersed in a continuous oil phase, wherein said phases are mixed and homogenized, wherein the discontinuous substantially anhydrous phase comprises less than 20 percent by weight of water, wherein the continuous oil phase comprises a linear silicone polyether, wherein the linear silicone polyether has a structure selected from the group consisting of (a) a rake type structure wherein the polyoxyethylene or polyoxyethylene-polyoxypropylene copolymeric units are grafted onto a siloxane backbone, and (b) an ABA block copolymeric structure wherein A represents the polyether portion and B represents the siloxane portion of an ABA structure; wherein the continuous oil phase further comprising silicone fluids; and wherein the discontinuous substantially anhydrous phase further comprising two polyols, wherein the first polyol is selected from the group consisting of glycerine and propylene glycol and the second polyol is polyethylene glycol, at least one salt and at least one coemulsifier wherein said composition has a lubricity of at least about 33 wherein the discontinuous substantially anhydrous phase comprises less than about 5% water by weight of the composition.
2. A glycol-in-silicone emulsion lubricant composition according to claim 1 wherein the continuous oil phase comprises about 1.8 to about 3.5 percent by weight of the linear silicone polyether, about 18 to about 27 percent by weight of a volatile silicone solvent, wherein said volatile silicone solvent comprises a volatile cyclic alkyl siloxane with the formula (R′″2SiO) d or a volatile linear alkyl siloxane with the formula R′″3SiO(R′″ 2SiO) e SiR′″3 in which R′″ is an alkyl group containing 1-6 carbon atoms, d is 3-6 and e is 0-5.
3. The glycol-in-silicone emulsion lubricant composition according to claim 1 wherein the volatile silicone solvent is selected from the group consisting of hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, octamethyltrisiloxane, hexamethyldisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, tetradecamethylhexasiloxane, and hexadecamethylheptasiloxane.
4. The glycol-in-silicone emulsion lubricant composition according to claim 1 wherein said salt is an inorganic salt soluble in the discontinuous substantially anhydrous phase.
5. The glycol-in-silicone emulsion lubricant composition according to claim 4 wherein said salt is selected from the group consisting of sodium chloride, potassium chloride, ammonium chloride, magnesium chloride, calcium bromide, sodium bromide, sodium acetate, potassium acetate, sodium citrate and combinations thereof.
6. The glycol-in-silicone emulsion lubricant composition according to claim 4 , wherein said salt comprises from about 0.1 to about 1% by weight of the composition.
7. The glycol-in-silicone emulsion lubricant composition according to claim 1 , wherein the coemulsifier comprises polyoxyethylene sorbitan fatty acids selected from the group consisting of polysorbate 20, polysorbate 40, polysorbate 60, polysorbate 80 and combinations thereof.
8. The glycol-in-silicone emulsion lubricant composition according to claim 7 , wherein said co-emulsifier comprises from about 0.5 to about 2% by weight of the composition.
9. A glycol-in-silicone emulsion lubricant composition according to claim 1 wherein said linear silicone polyether is selected from the group consisting of (i) volatile polydimethylsiloxanes selected from the group consisting of hexamethyldisiloxane, octamethyltrisiloxane, and decamethylcyclopentasiloxane; and (ii) nonvolatile polydimethylsiloxanes having a viscosity from about 5 to about 30,000 centistoke (mm 2 /s).
10. A glycol-in-silicone emulsion according to claim 1 wherein said emulsion further comprises silicone gums.
11. The glycol-in-silicone emulsion lubricant composition according to claim 10 wherein the silicone gums comprise from about 2 to about 10% by weight of the composition.