# US 9,867,764 B2 · Oral care composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,867,764 B2 - Document ID: US9867764B2 - Status: Granted - Kind: B2 - Application number: 14/914,120 - Filed: 2014-09-02 - Published: 2016-07-21 - Granted: 2018-01-16 - Earliest claimed: 2013-09-10 - Assignees: Conopco, Inc. - Applicants: Conopco, Inc. - Inventors: Xiaoke Li; Weining Liu - Web page: https://patentgrep.com/patent/US9867764B2 ## CPC - A61K 8/25: Silicon; Compounds thereof - A61K 8/0241: {Containing particulates characterized by their shape and/or structure (see also A61K8/04, A61K8/11, and A61K8/14, further aspects are classified in A61K2800/40 and subcodes)} - A61K 8/29: Titanium; Compounds thereof - A61Q 11/00: Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses - A61K 2800/621: by inorganic compounds - A61K 2800/651: The particulate/core comprising inorganic material - A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D) - A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS ## Abstract An oral care composition is disclosed comprising calcium silicate and high refractive index composite particles, wherein the refractive index of the composite particles is in the range from 1.9 to 4.0, and wherein the calcium silicate and high refractive index composite particles are present at a calcium silicate to composite particles weight ratio of 1:10 to 2:1. ## Claims ### Claim 1 An oral care composition comprising: a) calcium silicate; and b) high refractive index composite particles having diameters of 10 nm to less than 50 microns, wherein the high refractive index composite particle comprises a first component core and a second component coating comprising calcium silicate; wherein the first component core comprises a metal salt selected from the group consisting of zinc oxide, titanium dioxide, zirconium dioxide, and a mixture thereof; wherein the refractive index of the composite particles is in the range from 1.9 to 4.0; and wherein the calcium silicate and high refractive index composite particles are present in a weight ratio (a:b) of 1:10 to 2:1. ### Claim 2 (depends on 1) The oral care composition according to claim 1, wherein the calcium silicate of component (a) is calcium silicate hydrate which comprises water of hydration in an amount of from 5 to 50% by weight of the calcium silicate hydrate. ### Claim 3 (depends on 1) The oral care composition according to claim 1, wherein the calcium silicate of component (a) is present in an amount from 0.1 to 50% by weight of the composition. ### Claim 4 (depends on 3) The oral care composition according to claim 3, wherein the calcium silicate of component (a) is present in an amount from 1 to 20% by weight of the composition. ### Claim 5 (depends on 1) The oral care composition according to claim 1, wherein the refractive index of the composite particles is in the range from 2.5 to 3.0. ### Claim 6 (depends on 1) The oral care composition according to claim 1, wherein the second component coating further comprises an element selected from the group consisting of potassium, sodium, magnesium, aluminum and a mixture thereof. ### Claim 7 (depends on 1) The oral care composition according to claim 1, wherein the first component core of high refractive index composite particle is titanium dioxide. ### Claim 8 (depends on 1) The oral care composition according to claim 1, wherein the high refractive index composite particle is present in an amount from 0.25 to 60% by weight of the composition. ### Claim 9 (depends on 8) The oral care composition according to claim 8, wherein the high refractive index composite particle is present in an amount from 1 to 30% by weight of the composition. ### Claim 10 (depends on 1) The oral care composition according to claim 1, wherein the relative weight ratio of calcium silicate to high refractive index composite particles ranges from 1:3 to 2:1. ### Claim 11 (depends on 1) The oral care composition according to claim 1, wherein the composition is substantially free of phosphate source. ### Claim 12 (depends on 1) A method for whitening the teeth of an individual comprising applying the composition as claimed in claim 1 to at least one surface of the teeth of the individual. ### Claim 13 (depends on 1) A process for manufacturing the oral care composition as claimed in claim 1 wherein the process comprises the steps of: i) manufacturing high refractive index composite particles; ii) mixing the composite particles with calcium silicate to form the oral care composition. ### Claim 14 An oral care composition comprising: a) calcium silicate; and b) high refractive index composite particles, wherein the high refractive index composite particles comprise a first component core and a second component coating, wherein the first component core is titanium dioxide and the second component coating is calcium silicate; wherein the refractive index of the composite particles is in the range from 1.9 to 4.0; wherein the calcium silicate and high refractive index composite particles are present in a weight ratio (a:b) of 1:10 to 2:1. ### Claim 15 (depends on 14) The oral care composition according to claim 14, wherein the high refractive index composite particle is present in an amount from 0.25 to 60% by weight of the composition. ### Claim 16 (depends on 14) The oral care composition according to claim 14, wherein the high refractive index composite particle is present in an amount from 1 to 30% by weight of the composition. ### Claim 17 (depends on 16) The oral care composition according to claim 16, wherein the relative weight ratio of calcium silicate to high refractive index composite particles ranges from 1:3 to 2:1.