Patent SG-11201806104U-A (SG)
Title: Hexagonal silica platelets and methods of synthesis thereof
Inventor: YONG GEN
IPC: C08K3/36
Filed: 2017-01-18
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 27 July 2017 (27.07.2017) WIPO I PCT (10) International Publication Number WO 2017/127021 Al 11111111111111011101010111110101111101110111010111011010111011111111111110111111 (51) International Patent Classification: CO1B 33/12 (2006.01) C07F 7/02 CO1B 33/18 (2006.01) C08K 3/36 B82Y 30/00 (2011.01) A61K 8/25 (21) International Application Number: PCT/SG2017/050025 (22) International Filing Date: 18 January 2017 (18.01.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 10201600387Y 18 January 2016 (18.01.2016) SG (71) Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH [SG/SG]; 1 Fusionopolis Way, #20-10 Connexis, Singapore 138632 (SG). (72) Inventors: YONG, Gen; c/o Institute of Materials Re- search & Engineering, 2 Fusionopolis Way, Innovis, #08- 03, Singapore 138634 (SG). XU, Weiyin; c/o Institute of Materials Research & Engineering, 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634 (SG). LIU, Connie Kin Man; c/o Institute of Materials Research & Engineer- ing, 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634 (SG). (74) Agent: SPRUSON & FERGUSON (ASIA) PTE LTD; P.O. Box 1531, Robinson Road Post Office, Singapore 903031 (SG). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: — of inventorship (Rule 4.17(iv)) Published: with international search report (Art. 21(3)) (2006.01) (2006.01) (2006.01) W O 20 17127 / 0 21 Al (54) Title: HEXAGONAL SILICA PLATELETS AND METHODS OF SYNTHESIS THEREOF (57) : The present invention relates to a method for forming silica nanoparticles in an aqueous medium, the method com- prising steps of providing a surfactant solution comprising a cationic surfactant in an aqueous medium; and mixing a silane source with the surfactant solution under pH conditions of about pH 5 to 8 for forming said silica nanoparticles. The present invention also relates to silica suspension comprising a plurality of hexagonally shaped silica platelets, said platelets being substantially monod - isperse and having a width dimension from around 50 to 1000 nm, said platelets being suspended in an aqueous medium, wherein said aqueous medium comprises a single type of cationic surfactant. Furthermore, the invention relates to a silica nanoparticle pre- pared by reacting a silane source with a volumetric excess of a surfactant under pH of about 5 to about 8 in the presence of an aqueous solvent. Also, the present invention relates to a silica platelet obtainable by a method as disclosed herein.