公开(公告)号：US20230365419A1

公开(公告)日：2023-11-16

申请号：US18247242

申请日：2021-09-21

Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.

Inventor： Yasuyuki MURAKAMI ,  Satsuki MOTOISHI ,  Hisao KOIZUMI ,  Satoshi KOMORI ,  Hironobu OGATA

IPC: C01B33/193

CPC classification number: C01B33/193 ,  C01P2002/02 ,  C01P2004/64 ,  C01P2004/04 ,  C01P2002/54 ,  C01P2006/12 ,  C01P2002/88

Abstract: Provided is a boron-containing amorphous silica powder more excellent in terms of low temperature sinterability than conventional silica powders. The present invention relates to amorphous silica powder containing boron atoms, the boron-containing amorphous silica powder having an average particle size of 10 to 100 nm, as determined from 40 particles selected at random in a transmission electron micrograph, the boron-containing amorphous silica powder having a decrement in a boron content of 10 mass % or less, when fired under the following conditions:

5 to 10 g of a dried product of the boron-containing amorphous silica powder is filled into an alumina crucible, heated in the atmosphere at 200° C./hour to 1000° C. to 1100° C., maintained as it is for 5 hours, and cooled to room temperature.

公开(公告)号：US20200297598A1

公开(公告)日：2020-09-24

申请号：US16767946

申请日：2018-09-21

Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.

Inventor： Hisao KOIZUMI ,  Momoko ISHIKAWA ,  Nanae OGATA ,  Kenji MORI

IPC: A61K8/29 ,  A61Q1/12 ,  A61Q1/10 ,  C09K11/57 ,  C09K11/64 ,  A61K8/26 ,  A61K8/27 ,  C09K11/54

Abstract: The present invention provides a cosmetic product capable of making the skin look youthful and producing a natural three-dimensional appearance. The present invention relates to a cosmetic product including two or more phosphors each containing an inorganic compound, wherein the cosmetic product, upon excitation by excitation light having a wavelength of 365 nm, emits an emission spectrum having a fluorescence emission peak in each of the range of 400 to 530 nm and the range of 620 to 720 nm and having an I2/I1 of 1 to 30, where I1 is a maximum emission intensity in the range of 530 to 620 nm and I2 is a maximum peak intensity in the range of 620 to 720 nm.

公开(公告)号：US20240002240A1

公开(公告)日：2024-01-04

申请号：US18247010

申请日：2021-09-21

Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.

Inventor： Yasuyuki MURAKAMI ,  Satsuki MOTOISHI ,  Hisao KOIZUMI ,  Satoshi KOMORI ,  Hironobu OGATA

IPC: C01B33/141

CPC classification number: C01B33/1415 ,  C01P2004/51 ,  C01P2002/01 ,  C01P2004/32 ,  C01P2004/64

Abstract: The present invention provides a boron-containing silica dispersion having better dispersion stability at a high concentration, and higher binding properties between boron and silica than conventional dispersions. The present invention is a boron-containing silica dispersion containing amorphous silica particles containing boron atoms and a dispersion medium; the boron-containing amorphous silica particles having an average particle size of 10 to 100 nm, as determined from 40 particles selected at random in a transmission electron micrograph; the boron-containing silica dispersion having a solids content of 5 to 30 mass %; and the boron-containing silica dispersion having a sedimentation rate of the particles of 4% or less, when the boron-containing silica dispersion is left standing for 1000 hours, and proportions of SiO2 and B2O3 of 90.0 to 99.8 mass % and 0.2 to 10.0 mass %, respectively, in 100 mass % of a total of SiO2 and B2O3, all terms of oxide, when the boron-containing silica dispersion is subjected to ultrafiltration by the following method and dried; washing is performed by sequentially adding pure water in an amount of 6 times the volume of the boron-containing silica dispersion at a flow rate of a liquid fed of 3660 ml/minute using an ultrafiltration membrane with a fraction molecular weight of 13,000.