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公开(公告)号：US20240034823A1
公开(公告)日：2024-02-01
申请号：US18359626
申请日：2023-07-26
Applicant: Agency for Science, Technology and Research
Inventor： Srinivasa Reddy Mothe , Praveen Thoniyot
IPC: C08F222/10 , C08F222/26 , C08F2/06
CPC classification number: C08F222/10 , C08F222/26 , C08F2/06
Abstract: A polymer particle production method includes: providing (12) one or more vinyl monomers; performing (14) free radical ring-opening polymerization (rROP) of cyclic ketene acetal (CKA) with the one or more vinyl monomers in a first organic solvent with a radical source to obtain a rROP reaction mixture; and emulsifying (16) the rROP reaction mixture in a second organic solvent to produce a plurality of polymer particles.
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公开(公告)号：US12053754B2
公开(公告)日：2024-08-06
申请号：US17279001
申请日：2019-09-24
Applicant: Agency for Science, Technology and Research
Inventor： Praveen Thoniyot , Alexander M. Van Herk
Abstract: There is provided a method of producing silica capsules, the method comprising: adding a silica precursor to emulsified droplets in the presence of salt and alcohol to enhance silica growth around the emulsified droplets by an ion association effect, thereby forming silica capsules. Also provided are silica capsules producible by such a method.
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公开(公告)号：US20220169801A1
公开(公告)日：2022-06-02
申请号：US17438773
申请日：2020-04-09
Applicant: Agency for Science, Technology and Research
Inventor： Praveen Thoniyot
IPC: C08G81/02
Abstract: An organic solvent-free method of producing a polyester is disclosed herein. The method may include providing a mixture comprising at least one precursor of the polyester, wherein the at least one precursor is a liquid, and contacting the mixture with a gaseous inorganic acid to produce the polyester. A polyester obtained according to such a method is also disclosed herein.
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公开(公告)号：US20220243075A1
公开(公告)日：2022-08-04
申请号：US17599048
申请日：2020-03-27
Applicant: Agency for Science, Technology and Research
Inventor： Ritwik Panigrahi , Alexander Maria Van Herk , Praveen Thoniyot
Abstract: There is provided a composition comprising: (i) a polymer; (ii) inorganic particles; and (iii) aqueous medium, wherein the inorganic particles are adapted to interact with the polymer to cause an increase in glass transition temperature (Tg) during film formation of the composition. Also provided are a film, a method of preparing said film, a kit and a coated substrate.
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公开(公告)号：US20220032254A1
公开(公告)日：2022-02-03
申请号：US17279001
申请日：2019-09-24
Applicant: Agency for Science, Technology and Research
Inventor： Praveen Thoniyot , Alexander M. Van Herk
Abstract: There is provided a method of producing silica capsules, the method comprising: adding a silica precursor to emulsified droplets in the presence of salt and alcohol to enhance silica growth around the emulsified droplets by an ion association effect, thereby forming silica capsules. Also provided are silica capsules producible by such a method.
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Patent Agency Ranking
公开(公告)号：US20230323176A1
公开(公告)日：2023-10-12
申请号：US17718802
申请日：2022-04-12
Inventor： Praveen Thoniyot , Sam Siming Dong , Yi Jie Eng , Steve Tan , Amanda Khoo
CPC classification number: C09K5/02 , C04B22/06 , C04B24/04 , B01J13/04 , C04B24/383 , C04B2103/0071
Abstract: There is provided a composition comprising a slurry of capsules, the capsules having shells comprising silica and said shells encapsulating phase change materials (PCM); and a cementitious binder. There is also provided a method for preparing said composition.
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公开(公告)号：US11529317B2
公开(公告)日：2022-12-20
申请号：US16499560
申请日：2018-03-28
Applicant: Agency for Science, Technology and Research
Inventor： Eun Ju Park , Alexander M. Van Herk , Praveen Thoniyot
Abstract: There is provided a method of preparing silica nanocapsules, the method comprising mixing a surfactant with water at a temperature that is above the gel-to-liquid transition temperature of the surfactant to form a mixture, passing the mixture one or more times through at least one pore to obtain a dispersion of vesicles, and adding a silica precursor to the dispersion of vesicles to form silica nanocapsules. Also provided is a silica nanocapsule formed from a vesicle template, and a method of delivering one or more types of molecules to a subject. In a specific embodiment, hollow silica nanocapsules having substantially lens-shaped are synthesized by employing dimethyldioctadecylammonium bromide (DODAB) or dioctadecyldimethyl ammonium chloride (DODAC) as the vesicle template and tetraethyl orthosilicate (TEOS) as the silica precursor.
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公开(公告)号：US20230070998A1
公开(公告)日：2023-03-09
申请号：US17285302
申请日：2019-10-15
Applicant: Agency for Science, Technology and Research
Inventor： Praveen Thoniyot , Alexander Maria Van Herk , Wenguang Zhao
Abstract: There is provided a method of preparing a hybrid capsule, the method comprising heterocoagulating organic polymer latex particles with a primary capsule to form an organic polymer coating layer over a shell of the primary capsule.
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公开(公告)号：US11534375B2
公开(公告)日：2022-12-27
申请号：US16498284
申请日：2018-03-27
Applicant: Agency for Science, Technology and Research
Inventor： Praveen Thoniyot , Parijat Kanaujia , Alexander M. Van Herk
Abstract: Present disclosure relates to a solvent-free method of encapsulating a hydrophobic active in personal care, hydrophobic active in crop protection or a hydrophobic active pharmaceutical ingredient (API) in polymeric nanoparticles. The method includes mixing the hydrophobic active in a polymer melt, wherein the polymer melt comprises a melt of a block co-polymer, wherein the polymer melt acts as a solvent for the hydrophobic active. The method further includes maintaining the polymer melt in water for sufficient time to allow self-assembly of the block co-polymer to encapsulate the hydrophobic active therein.
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公开(公告)号：US20200179248A1
公开(公告)日：2020-06-11
申请号：US16498284
申请日：2018-03-27
Applicant: Agency for Science, Technology and Research
Inventor： Praveen Thoniyot , Parijat Kanaujia , Alexander M. Van Herk
Abstract: Present disclosure relates to a solvent-free method of encapsulating a hydrophobic active in personal care, hydrophobic active in crop protection or a hydrophobic active pharmaceutical ingredient (API) in polymeric nanoparticles. The method includes mixing the hydrophobic active in a polymer melt, wherein the polymer melt comprises a melt of a block co-polymer, wherein the polymer melt acts as a solvent for the hydrophobic active. The method further includes maintaining the polymer melt in water for sufficient time to allow self-assembly of the block co-polymer to encapsulate the hydrophobic active therein.
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