IE36322L - Dentifrices - Google Patents

Abstract

1347650 Visually clear dentifrice COLGATEPALMOLIVE CO 20 April 1972 [30 April 1971] 18416/72 Heading A5B Visually clear dentifrice comprises a dentally acceptable water-insoluble particulate polishing agent in a gel vehicle having the same refractive index as the polishing agent, the polishing agent being a synthetic amorphous complex aluminosilicate salt of an alkali metal (e.g. sodium, potassium or lithium), alkaline earth metal (e.g. magnesium or calcium), or ammonia, in which silica is interbonded with alumina and which contains up to 3.3% by weight of the polishing agent of alumina, and in which the mole ratio of silica to alumina is at least 45:1, the polishing agent having a refractive index of 1.44 to 1.47, containing up to 20% by weight of moisture and up to 10% by weight of alkali metal or alkaline earth metal oxide. The dentifrice may contain water, a humectant such as glycerine and/or sorbitol, a gelling agent such as sodium carboxymethyl cellulose, a surface active agent such as sodium lauryl sulphate, a flavouring agent such as chloroform, a sweetening agent such as sodium saccharin, a fluorine-containing compound such as sodium monofluorophosphate and/or sodium fluoride, a colouring or whitening agent or dyestuff, a preservative such as sodium benzoate, a silicone, a chlorophyll compound, an ammoniated material, an antibacterial agent, and/or a thickening agent such a synthetic finely divided silica. Bubbles of air or another gas such as nitrogen or carbon dioxide, visible particles of dyes, pearlescent flakes or particles of insoluble salts of antibacterial agents may be distributed in the dentifrice. [GB1347650A]