US 11,779,525 B2
Process and cosmetic composition for gloss and blur
Huailing Gao, Hefei (CN); Zhao Pan, Hefei (CN); Lin Wang, Shanghai (CN); Shuhong Yu, Hefei (CN); and Shuqi Zhu, Shanghai (CN)
Assigned to CONOPCO, INC., Englewood Cliffs, NJ (US)
Appl. No. 17/295,620
Filed by CONOPCO, INC., Trumbull, CT (US)
PCT Filed Dec. 9, 2019, PCT No. PCT/EP2019/084230
§ 371(c)(1), (2) Date May 20, 2021,
PCT Pub. No. WO2020/136001, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 19153862 (EP), filed on Jan. 28, 2019.
Prior Publication US 2022/0015994 A1, Jan. 20, 2022
Int. Cl. A61K 8/25 (2006.01); A61K 8/02 (2006.01); A61K 8/58 (2006.01); A61K 8/96 (2006.01); A61Q 1/12 (2006.01)
CPC A61K 8/0254 (2013.01) [A61K 8/025 (2013.01); A61K 8/585 (2013.01); A61K 8/965 (2013.01); A61Q 1/12 (2013.01); A61K 2800/26 (2013.01); A61K 2800/412 (2013.01); A61K 2800/621 (2013.01)] 15 Claims
 
1. A method of preparing composite particles comprising a non-porous spherical particulate inorganic material deposited on a plate-like inorganic material, where refractive index of said particulate inorganic material is greater than that of said plate-like inorganic particulate material, wherein, said spherical material occupies 20 to 80% of total surface area of said plate-like material and wherein the amount of said spherical material accounts for 2 to 20 wt % of said composite particles, further wherein said plate-like inorganic material is mica and said non-porous spherical particulate inorganic material is silicon dioxide, said method comprising the steps of:
(i) silanization of said plate-like inorganic material to get a silanized material having functional groups “A”;
(ii) silanization of said non-porous spherical particulate inorganic material to get a silanized material having functional groups “B”, where “A”≠“B”; and where said “A” and said “B” are capable of reacting with each other such that by way of their reaction, said non-porous spherical particulate inorganic material deposits on said plate-like inorganic material; and,
(iii) reacting said silanized material having functional groups “A” with said silanized material having functional groups “B”.