BLEACHING COMPOSITIONS IN FORM OF DENTIFRICE WITH PARTICLES OF SILICON DIOXIDE AS CORE/SHELL WITH ADDITION OF ZINC Russian patent published in 2020 - IPC A61K8/25 A61K8/02 A61K8/19 A61K8/27 A61K8/46 A61K8/49 A61Q11/00 

FIELD: hygiene.

SUBSTANCE: group of inventions relates to oral care. Whitening composition in form of a dentifrice comprises a blue dye, comprising at least one of a blue pigment and a blue dye, where blue dye is characterized by colour from blue to blue-violet with colour tone angle according to CIELAB system in range from 200 to 320 degrees; from 15 to 30 wt. % of silicon dioxide particles by core/shell type with addition of zinc (Zn-CSS), wherein the Zn-CSS particle comprises a core of silicon dioxide and a surface of a silicon dioxide core etched by metal silicate; and a carrier medium which is acceptable for use in the oral cavity, containing a non-aqueous solvent and water, where the bleaching composition in the form of a dentifrice contains no peroxide bleaching agents and oxidising agents. Method for bleaching a tooth surface and using a zinc oxide (Zn-CSS) particle-like silicon dioxide particle (Zn-CSS) as an agent for enhancing teeth whitening in a bleach composition in the form of a dentifrice are also disclosed.

EFFECT: group of inventions provides higher effectiveness of bleaching.

17 cl, 5 tbl, 3 ex