| 摘要 |
1,168,331. Toothpastes containing sodium chloride. J. R. GEIGY A.G. 18 Jan., 1967 [19 Jan, 1966], No. 2656/67. Heading A5B. A toothpaste comprises a concentrated aqueous sodium chloride solution in admixture with gelling agents which gel in such a solution, moisture-retaining agents, abrasives, surface active agents which give a surface tension of 45-60 dynes/cm. when 1 part of paste is dispersed in 20 parts of water, and if desired, 0.03-0.2% of sodium, saccharine and/or 0.3- 1.5% of sodium cyclamate and flavouring agents. The sodium chloride, which may be marine salt, suitably comprises 12-17% by weight of the composition, and moistureretaining agents, such as glycerin, sorbitol or other polyols, may form 5-20% thereof. The surface active agent, preferably a polypropylene glycol-ethylene oxide condensate or other like non-ionic substance is present in amounts of 0.1-1% to give the required surface tension, which is approximately that of saliva. Gelling agents, such as methyl- or hydroxyethyl-cellulose form 0.5-2.5% of the composition, while suitable abrasives are dicalcium phosphate dihydrate and insoluble sodium metaphosphate. Colloidal silicic acid, in amounts of 0.5-5%, may also be present. |
