A transparent liquid dentifrice which comprises a particulate silica abrasive material present in from 10 to 15% by weight of the composition, stably suspended in an aqueous liquid vehicle with the aid of a suspending agent; and a humectant system which consists essentially of sorbitol, present in from 50 to 55% by weight of the composition (measured as the 100% active), and polyethylene glycol with average molecular weight in the range 200 to 600, present in from 0.5 to 3% by weight of the composition.
This is a continuation of PCT application Ser. No. PCT/EP95/00557 filed Feb. 15, 1995 which claimed priority from GB 9403581.3 filed on Feb. 24, 1994, GB9410654.9 filed on May 27, 1994 and GB9424346.6 filed Dec. 2, 1994 .
Priority Data
Feb 24, 1994 [GB] 9403581 May 27, 1994 [GB] 9410654 Dec 02, 1994 [GB] 9424346
The invention provides a substantially nonirritating oral composition containing a surfactant system comprised of a combination of an anionic surfactant, an amphoteric surfactant and a nonesterified alkyl polyglucoside surfactant.
According to the present invention there is provided a visually clear, dentrifice gel comprising; a) sufficient tetrasodium pyrophosphate to provide from 0.2% to 5% pyrophosphate anion; b) a silica dental abrasive having a refractive index of from 1.445 to 1.47; c) from 0.7% to 3% sodium alkyl sulphate; and d) an aqueous liquid carrier. The gel has excellent clarity, high anticalculus efficiency and good foaming. According to a further aspect of the invention there is provided a process for making a clear dentifrice gel comprising the step of adding anhydrous tetrasodium pyrophosphate to an aqueous carrier, the gel comprising: a) a silica dental abrasive having a refractive index of from 1.445 to 1.47; and b) an aqueous liquid carrier comprising less than 27% total water. The use of anhydrous tetrasodium pyrophosphate allows greater formulation flexibility at the processing stage by freeing up water for the dissolution and/or hydration of other dentrifice components.
An oral composition comprising in an orally acceptable vehicle, an effective antiplaque amount of an halogenated diphenyl ether or phenolic antibacterial compound, and an amount of an mixed anionic/zwitterionic surfactant system which is effective to increase the uptake of the antibacterial compound to dental tissue so as to enhance the therapeutic efficacy of the administered antibacterial compound.
