| 发明名称 | Process of producing polylactic acid-based resin microparticles, polylactic acid-based resin microparticles and cosmetics | ||
| 摘要 | A process of producing polylactic acid-based resin microparticles includes a dissolving process that forms a system, which can cause phase separation into two phases of a solution phase mainly composed of polylactic acid-based resin (A) and a solution phase mainly composed of polymer (B) different from polylactic acid-based resin, by dissolving the polylactic acid-based resin (A) and the polymer (B) different from polylactic acid-based resin in an ether-based organic solvent (C), an emulsion-forming process that forms an emulsion by applying a shear force to the system, and a microparticle-forming process that precipitates polylactic acid-based resin microparticles by contacting the emulsion with a poor solvent which has lower solubility of the polylactic acid-based resin (A) than the ether-based organic solvent (C). | ||
| 申请公布号 | US9017812(B2) | 申请公布日期 | 2015.04.28 |
| 申请号 | US201113982804 | 申请日期 | 2011.12.22 |
| 申请人 | Toray Industries, Inc. | 发明人 | Takezaki Hiroshi;Kobayashi Hiroshi;Saito Makiko;Asano Itaru |
| 分类号 | B32B5/16;A61K9/14;A61K8/85;C08J3/14;C08J9/26;C08J9/28;G03G9/08;G03G9/087;A61Q1/02;A61Q1/10;A61K8/02;C08G63/08 | 主分类号 | B32B5/16 |
| 代理机构 | DLA Piper LLP (US) | 代理人 | DLA Piper LLP (US) |
| 主权项 | 1. Polylactic acid-based resin microparticles having a number average particle diameter of 1 to 25.1 μm and a linseed oil absorption of 90 ml/100 g or greater, wherein a molar ratio of monomer units of L-lactic acid and D-lactic acid is 90 mole % or more, and said microparticles have a particle diameter distribution index of 1 to 2. | ||
| 地址 | JP | ||