公开(公告)号：US20170319458A1

公开(公告)日：2017-11-09

申请号：US15536165

申请日：2015-12-17

Applicant: L'OREAL

Inventor： Shinichi MATSUFUJI ,  Toshifumi SHIROYA ,  Christophe DUMOUSSEAUX ,  Andres CARDOZO PEREZ

IPC: A61K8/81 ,  A61K8/29 ,  A61K8/06 ,  C08L33/12 ,  A61Q19/00 ,  C08L1/02 ,  A61K8/11 ,  A61K8/73

CPC classification number: A61K8/8152 ,  A61K8/0266 ,  A61K8/062 ,  A61K8/11 ,  A61K8/29 ,  A61K8/731 ,  A61K8/8117 ,  A61K8/8147 ,  A61K2800/262 ,  A61K2800/412 ,  A61K2800/594 ,  A61K2800/614 ,  A61K2800/624 ,  A61K2800/651 ,  A61K2800/654 ,  A61Q1/00 ,  A61Q19/00 ,  C08L1/02 ,  C08L33/12 ,  C08L2207/53

Abstract: The present invention relates to a composite particle comprising: at least one hydrophilic core particle; and a plurality of hydrophobic particles, wherein the surface of the hydrophilic core particle is substantially discontinuously covered by the hydrophobic particles. The novel composite particle according to the present invention can have surface active properties sufficient to prepare stable Pickering emulsions, and can maintain the surface active properties over a long period of time. The present invention also relates to a method for preparing the above composite particle.

公开(公告)号：US20220313566A1

公开(公告)日：2022-10-06

申请号：US17607926

申请日：2020-05-06

Applicant: L'OREAL

Inventor： Andres CARDOZO PEREZ ,  Antoine MONTAUX-LAMBERT

IPC: A61K8/02 ,  A61K8/29 ,  A61K8/25 ,  A61Q17/04 ,  A61K8/19

Abstract: The invention relates to i) a multilayer material; ii) a process for preparing said multilayer materials; iii) a cosmetic composition comprising one or more multilayer materials; iv) a process for treating keratin materials, notably human keratin materials such as the skin; v) the use of multilayer material for screening out ultraviolet (UV) rays. Said multilayer material has an odd number N of layers: ▪comprising at least three layers, each layer of which consists of a material A or of a material B different from A, said successive layers A and B being alternated and two adjacent layers having different refractive indices; ▪for which the thickness of each layer obeys the mathematical formula (I) below: [x/y/(αx/y)a/x] in which formula (I): x is the thickness of the inner and outer layer; y is the thickness of the layer adjacent to the inner layer αx or the outer layer x; α is an integer or fraction and α=2±0 to 15%, preferably α=2±0 to 10%, more preferentially α=2±0 to 5%, the intermediate odd layers (αx) have a double thickness±0 to 15% of the thickness of said outer layers x; and a represents an integer greater than or equal to 0, connected to the number of alternated layers N such that a=(N−3)/2; it being understood that: ▪preferably, x has a different thickness from y; ▪when several layers are of thickness x, this means that each layer has a thickness x±0 to 15%, preferably±0 to 10%, more preferentially±0 to 5%; ▪when several layers are of thickness y, this means that each layer has a thickness y±0 to 15%, preferably±0 to 10%, more preferentially±0 to 5%; and ▪when several layers are of thickness α x, this means that each layer has a thickness α x±0 to 15%, preferably±0 to 10%, more preferentially±0 to 5%.