Spreadable warming lubricant
A substantially anhydrous, spreadable warming lubricant composition comprising a mixture of glycerin, a polyhydric alcohol, and a non-ionic surfactant, the viscosity of the composition being less than that of glycerin but greater than that of the polyhydric alcohol, thereby promoting formation of a useful thin layer on a surface with which the composition is brought into contact, the surfactant improving wetting and spreadability of the composition on skin and latex, such that the composition can be applied to skin or a condom and provide an optimal warming effect upon contact with ambient moisture during use and such that the composition can be added to a condom package and, over the course of about a week, spread and coat nearly the entire internal and external surfaces of the condom.
1. An article, comprising:
a condom; and
a layer on the condom of a spreadable warming lubricant that comprises glycerin in an amount in the range of 48% to 49.95% by weight; a polyhydric alcohol in an amount in the range of 48% to 49.95% by weight and the glycerin and the polyhydric alcohol being present in a weight ratio of about 1:1; and a non-ionic surfactant in an amount in the range of 0.1% to 1% by weight.
2. The article of claim 1 , wherein the glycerin and the polyhydric alcohol are present in the spreadable warming lubricant a total amount in the range of 99% to 99.9% by weight.
3. The article of claim 1 , wherein the layer has a thickness in the range of 0.01 to 0.1 mm on the surface of the condom.
4. The article of claim 1 , wherein the polyhydric alcohol comprises propylene glycol.
5. The article of claim 1 , wherein the non-ionic surfactant comprises a polyoxyethylene sorbitan monoester.
6. The article of claim 5 , wherein the polyoxyethylene sorbitan monoester comprises polyoxyethylene sorbitan monolaurate.
7. The article of claim 1 , wherein the polyhydric alcohol is propylene glycol and the non-ionic surfactant is polyoxyethylene sorbitan monolaurate.
8. The article of claim 1 , wherein the lubricant comprises 49.5-49.95% by weight glycerin, 49.5-49.95% by weight propylene glycol and 0.1-1% by weight polyoxyethylene sorbitan monolaurate.
9. An article comprising:
a condom;
a spreadable lubricant on a surface of the condom, the lubricant generating warmth when contacting moisture, wherein the spreadable lubricant comprises a first polyhydric alcohol and a second polyhydric alcohol, wherein the total amount of the first and second polyhydric alcohols is in the range of 99 wt % to 99.9 wt %; a non-ionic surfactant in an amount in the range of 0.1 wt % to 1 wt %; and
a package containing the condom having the lubricant on the surface thereof.
10. The article of claim 9 , wherein the lubricant on the surface of the condom spreads to a thickness of 0.01 to 0.1 mm on the surface of the condom.
11. The article of claim 9 , wherein the first polyhydric alcohol is glycerin, the second polyhydric alcohol is propylene glycol, and the non-ionic surfactant is polyoxyethylene sorbitan monolaurate.
12. The article of claim 9 , wherein about 0.2 to about 5 ml of the lubricant is on the surface of the condom.
13. The article of claim 9 , wherein a stabilized contact angle between the spreadable lubricant and the condom is less than or equal to about 20 degrees.
14. The article of claim 9 wherein a first viscosity of the first polyhydric alcohol is in the range of 500 to 600 centipoise and a second viscosity of the second polyhydric alcohol is in the range of 25 to 40 centipoise.
15. The article of claim 9 , wherein the lubricant consists essentially of 49.5-49.95% by weight glycerin, 49.5-49.95% by weight propylene glycol and 0.1-1% by weight polyoxyethylene sorbitan monolaurate.
16. The article of claim 9 , wherein the lubricant has a viscosity of at least 140 centipoise.
17. A method of applying a spreadable warming lubricant onto the internal and external surfaces of a latex condom, which method comprises:
providing a spreadable warming lubricant that comprises glycerin in an amount in the range of 49.5% to 49.95% by weight; a polyhydric alcohol in an amount in the range of 49.5% to 49.95% by weight; and a non-ionic surfactant in an amount in the range of 0.1% to 1% by weight;
contacting the latex condom with about 0.2 to 5 ml of the spreadable warming lubricant;
forming a thin lubricious layer of the lubricant on the surfaces of the condom upon spreading of the lubricant.
18. The method of claim 17 wherein the thin lubricious layer of the lubricant has a thickness of in the range of 0.01 to 0.1 mm.
19. The method of claim 17 , wherein the lubricant comprises glycerin and propylene glycol in a weight ratio of 1:1 and 0.1-1% by weight polyoxyethylene sorbitan monolaurate.
20. The article of claim 1 , wherein a drop of the lubricant in the amount of 25 μL spreads to a diameter of at least 10.5 mm after about 5 minutes on moist skin.