ORAL CARE COMPOSITIONS FOR TOOTH DESENSITISING Russian patent published in 2018 - IPC A61K8/34 A61K8/362 A61K8/73 A61K8/81 A61Q11/00 

FIELD: hygiene.

SUBSTANCE: group of inventions relates to oral care compositions for tooth desensitising. Desensitising composition is disclosed, comprising: a) at least 40 %, by weight of the composition, water; b) from 0.01 % to 25 %, by weight of the composition, of a desensitising agent selected from oxalic acid, oxalic acid salts, and mixtures thereof; c) from 1 % to 2.5 %, by weight of the composition, of an adhesive polymer thickener, wherein the adhesive-creating polymer is selected from high molecular weight homopolymers and copolymers of acrylic acid, cross-linked with polyalkenyl polyester, and mixtures thereof; d) from 3 % to 5 %, by weight of the composition, of a secondary crosslinking polymer thickener selected from carboxymethylcellulose and mixtures thereof; e) from 10 % to 40 %, by weight of the composition, humectant; f) less than 0.1 %, by weight of the composition, abrasive. Composition contains a secondary structuring polymer in an amount equal to or greater than the amount of the adhesive-creating polymer; wherein the composition has a pH value less than 10 and exhibits a delta angle value of less than 35°. Complex modulus corresponds to Equation 1: Complex modulus ≥ 1,700e^{(-0.05 delta angle)} (Equation 1). Also disclosed is a desensitising composition containing: a) from 50 % to 65 %, by weight of the composition, water; b) from 1 % to 5 %, by weight of the composition, of a desensitising agent selected from oxalic acid, potassium salts of oxalic acid, and mixtures thereof; c) from 1 % to 2.5 %, by weight of the composition, of an adhesive polymer thickener selected from high molecular weight homopolymers and copolymers of acrylic acid, crosslinked with polyalkenyl polyester, and mixtures thereof; d) from 3 % to 5 %, by weight of the composition, of a secondary crosslinking polymer thickener selected from polycarboxylates, carboxylate-substituted polymers, and mixtures thereof; e) from 25 % to 40 %, by weight of the composition, humectant; and f) less than 0.1 %, by weight of the composition, abrasive; wherein, the ratio of the adhesive polymer and the secondary structuring polymer ranges from 1:1 to 1:5.

EFFECT: compositions can be used in a delivery system of a desensitising agent, where the delivery system of a desensitising agent will be stable during storage and transportation; the desensitising agent will be released from the composition to a target area; a delivery device will adhere to the desired site in the oral cavity for the desired period of time; and / or, in the case of the use of a protective coating, so that the strip and composition can be sufficiently released from the coating without leaving more than half of the composition thereon.

16 cl, 9 dwg, 8 tbl, 4 ex