Methods and compositions for use with gel dispensers
View Patent ↗A method is provided for reducing the frequency of mis-directed output of hydroalcoholic gel from a dispenser. The hydroalcoholic gel includes at least 30 wt. % of a C 1-4 alcohol, a polyacrylate thickener, and a plug-preventing additive that may be a C 6-10 alkane diol. A method of reducing the formation of coagulated gel deposits, and dispensable hydroalcoholic gel compositions are also provided.
1. A method of reducing the frequency of mis-directed output from a gel dispenser, the method comprising the steps of:
combining a C 1-4 alcohol, an effective amount of a polyacrylate thickener, and a plug-preventing additive to form a homogeneous dispensable gel composition; wherein said plug-preventing additive is a C 6-10 alkane diol; and wherein said composition comprises at least 50 wt. % of said alcohol, from about 0.01to about 10 wt. % of said thickener, and from about 0.05 to about 4 wt. % of said plug-prevent additive, all based upon the total weight of the dispensable gel composition; and
storing the dispensable gel composition in a pump dispenser that includes an outlet and that is activated on a periodic basis, wherein the frequency of mis-directed output is reduced by at least 50% when compared to a dispensable gel composition that is identical to said homogeneous dispensable gel composition except that it does not include the plug-preventing additive.
2. The method of claim 1 , wherein C 1-4 alcohol is selected from the group consisting of ethanol, propanol, isopropanol, butanol, isobutanol, tertiary butanol, methanol, and mixtures thereof.
3. The method of claim 2 , wherein the plug-preventing additive is 1,2-octanediol, 1,2-hexanediol, 1,9-nonanediol, 1,2-decanediol, 1,10-decanediol, or a mixture thereof.
4. The method of claim 3 , wherein the polyacrylate thickener is selected from the group consisting of acrylates/C 10-30 alkyl acrylate crosspolymers, copolymers of acrylic acid and alkyl C5-C10 acrylate, copolymers of acrylic acid and maleic anhydride, carbomers, and mixtures thereof.
5. The method of claim 1 , wherein the plug-preventing additive is 1.2-octanediol, and wherein the 1.2-octanediol is present in an amount of from about 0.1 to about 1 wt. %, based upon the total weight of the composition.
6. The method of claim 1 , wherein the composition has a viscosity of from about 1000 to about 65,000 centipoise, when measured using RV or LV spindles at 22° C.
7. The method of claim 1 , wherein the C 6-10 alkane diol is present in an amount of from about 0.15 to about 0.7 wt. %, based upon the total weight of the composition.
8. The method of claim 1 , wherein the C 6-10 alkane diol is present in an amount of from about 0.2 to about 0.6 wt. %, based upon the total weight of the composition.
9. The method of claim 1 , wherein the C 6-10 alkane diol is 1,2-octane diol.
10. The method of claim 9 , wherein the composition comprises at least 60 wt. % of said alcohol.
11. The method of claim 10 , wherein the thickener is a carbomer.