Dentrifices
AssigneeColgate-Palmolive Company
InventorKenneth Harvey
Life of this patent
Estimating the term…
Abstract
An additive, 0.05% to 5% of phytic acid, a chelator, unlike other chelators such as tartaric acid or ethylene diamine tetra acetic acid, prevents or reduces color fading of from 0.0007% to 0.5% of a water-soluble non-toxic red or yellow monoazo or blue triarylmethane dye-colored visually clear dentrifice containing both alkali metal monofluorophosphate in an amount to provide from 0.01% to 1% of fluorine and from 5% to 50% of a selected siliceous polishing agent having an index of refraction between 1.44 and 1.47, in a liquid vehicle having an index of refraction matching that of said siliceous polishing agent.
Claims10
A visually clear dentrifice comprising a dentrifice vehicle containing from 5% to 50% of a siliceous polishing agent having an empirical SiO.sub.2 content of at least 70%, a particle size in the range from 1 to 35 microns, a substantially amorphous X-ray structure and an index of refraction between 1.44 and 1.47;
- a liquid vehicle having an index of refraction matching that of said siliceous polishing agent;
- alkali metal monofluorophosphate in amount to provide from 0.01% to 1% of fluorine;
- from 0.0007% to 0.5% of a water-soluble non-toxic red or yellow monoazo dye or blue triarylmethane dye;
- and from 0.05% to 5% of phytic acid as an additive which prevents or reduces colour fading.
Dependencies are inferred from the claim text.