US 12,133,910 B2
Oil agent-containing silicone elastomer particle and use thereof in cosmetic composition, etc
Mari Wakita, Ichihara (JP); Hiroko Taniguchi, Ichihara (JP); Yasue Kanzaki, Ichihara (JP); and Seiji Hori, Ichihara (JP)
Assigned to DOW TORAY CO., LTD., Tokyo (JP)
Appl. No. 17/041,699
Filed by DOW TORAY CO., LTD., Tokyo (JP)
PCT Filed Mar. 27, 2019, PCT No. PCT/JP2019/013253
§ 371(c)(1), (2) Date Sep. 25, 2020,
PCT Pub. No. WO2019/189394, PCT Pub. Date Oct. 3, 2019.
Claims priority of application No. 2018-059333 (JP), filed on Mar. 27, 2018.
Prior Publication US 2021/0113452 A1, Apr. 22, 2021
Int. Cl. A61K 8/891 (2006.01); A61K 8/02 (2006.01); A61K 8/06 (2006.01); A61K 8/19 (2006.01); A61K 8/23 (2006.01); A61K 8/25 (2006.01); A61K 8/26 (2006.01); A61K 8/27 (2006.01); A61K 8/29 (2006.01); A61K 8/31 (2006.01); A61K 8/34 (2006.01); A61K 8/365 (2006.01); A61K 8/368 (2006.01); A61K 8/37 (2006.01); A61K 8/41 (2006.01); A61K 8/49 (2006.01); A61K 8/58 (2006.01); A61K 8/60 (2006.01); A61K 8/73 (2006.01); A61K 8/81 (2006.01); A61K 8/86 (2006.01); A61K 8/894 (2006.01); A61K 8/92 (2006.01); A61Q 1/02 (2006.01); A61Q 1/04 (2006.01); A61Q 1/08 (2006.01); A61Q 1/10 (2006.01); A61Q 1/12 (2006.01); A61Q 5/06 (2006.01); A61Q 17/04 (2006.01); A61Q 19/00 (2006.01); A61Q 19/08 (2006.01)
CPC A61K 8/891 (2013.01) [A61K 8/0208 (2013.01); A61K 8/022 (2013.01); A61K 8/0241 (2013.01); A61K 8/062 (2013.01); A61K 8/064 (2013.01); A61K 8/19 (2013.01); A61K 8/23 (2013.01); A61K 8/25 (2013.01); A61K 8/26 (2013.01); A61K 8/27 (2013.01); A61K 8/29 (2013.01); A61K 8/31 (2013.01); A61K 8/345 (2013.01); A61K 8/365 (2013.01); A61K 8/368 (2013.01); A61K 8/37 (2013.01); A61K 8/41 (2013.01); A61K 8/416 (2013.01); A61K 8/4946 (2013.01); A61K 8/585 (2013.01); A61K 8/60 (2013.01); A61K 8/735 (2013.01); A61K 8/8117 (2013.01); A61K 8/8147 (2013.01); A61K 8/8158 (2013.01); A61K 8/86 (2013.01); A61K 8/894 (2013.01); A61K 8/92 (2013.01); A61K 8/922 (2013.01); A61K 8/925 (2013.01); A61Q 1/02 (2013.01); A61Q 1/04 (2013.01); A61Q 1/08 (2013.01); A61Q 1/10 (2013.01); A61Q 1/12 (2013.01); A61Q 5/065 (2013.01); A61Q 17/04 (2013.01); A61Q 19/00 (2013.01); A61Q 19/007 (2013.01); A61Q 19/08 (2013.01); A61K 2800/10 (2013.01); A61K 2800/412 (2013.01)] 20 Claims
 
1. An oil-including silicone elastomer particle, which is produced by:
subjecting a cross-linkable silicone emulsion particle to a cross-linking reaction in water;
wherein the cross-linkable silicone emulsion particle is obtained by:
emulsifying in water a mixture of:
(A) a cross-linkable silicone composition comprising at least (a) an organopolysiloxane having at least two alkenyl groups, with carbon numbers between 4 and 20, within the molecule; and
(B) an oil that is liquid at 40° C.;
thereby, wherein:
the silicone elastomer particle includes, within the silicone elastomer particle, the oil that is a liquid at 40° C. (B);
the silicone elastomer particle has a structure wherein at least two silicon atoms within the silicone elastomer particle are cross-linked through a silalkylene group with a carbon number between 4 and 20; and
the content of the oil that is a liquid at 40° C. (B) and included in the silicone elastomer particle is in a range of between 5 and 60 mass % with respect to the silicone elastomer particle as a whole.