Liquid dentifrice compositions
AssigneeLion Corporation
InventorsYoshihiro Ebine, Kenji Kaneko, Satoshi Hayashi
Life of this patent
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Abstract
Liquid dentrifice compositions having an abrasive uniformly dispersed in aqueous medium have a low viscosity to maintain flow and stability with the lapse of time. The compositions contain 5-40% of silica or similar abrasive and an optional xanthan gum/polyacrylate binder such that they have a visocity of 20-180 poise at 25.degree.C. and a yield value of 1-60 Pa at 25.degree. C.
Claims25
A pump dispenser or squeeze bottle container liquid dentifrice composition comprising an aqueous medium containing a binder in the form of xanthan gum and a humectant, and 5 to 40% by weight of the composition being a silica abrasive having a specific surface area of 5 to 100 m.sup.2 /g as measured by BET method, said liquid dentifrice composition having a viscosity of 20 to 180 poise at 25.degree. C. and a yield value of 1 to 60 Pascal at 25.degree. C., said liquid dentifrice composition being:
- a) dispensed as a fluid, by extrusion,
- b) sufficiently viscous to remain on top of, and not quickly soak through, the bristles of the toothbrush,
- c) easily rinsed away from a toothbrush, and,
- d) after rinsing, leaving no significant deposits adhered to the bristles, said liquid dentifrice having improved stringiness, and being neither a gel dentifrice nor a toothpaste, said abrasive kept stably dispersed without settling down, and with minimized lowering of fluidity, with a binder in an amount of 0.05 to 2% by weight, and 10 to 80% by weight of a humectant in an amount effective to achieve the viscosity and yield value in the specified ranges.
A liquid dentifrice composition comprising an aqueous medium containing a binder in the form of a mixture of xanthan gum and a polyacrylic acid salt in a weight ratio of from 3:1 to 1:5 and a humectant, and 5 to 40% by weight of the composition being a silica abrasive having a specific surface area of 5 to 100 m.sup.2 /g as measured by BET method, said liquid dentifrice composition having a viscosity of 20 to 180 poise at 25.degree. C. and a yield value of 1 to 60 Pascal at 25.degree. C., said liquid dentifrice composition being:
- a) dispensed as a fluid, by extrusion,
- b) sufficiently viscous to remain on top of, and not quickly soak through, the bristles of the toothbrush,
- c) easily rinsed away from a toothbrush, and,
- d) after rinsing, leaving no significant deposits adhered to the bristles, said liquid dentifrice having improved stringiness, and being neither a gel dentifrice nor a toothpaste, said abrasive kept stably dispersed without settling down, and with minimized lowering of fluidity, with a binder in an amount of 0.05 to 2% by weight, and 10 to 80% by weight of a humectant in an amount effective to achieve the viscosity and yield value in the specified ranges.
Dependencies are inferred from the claim text.