	US 11,725,072 B2
	Alkyl-modified carboxyl group-containing copolymer, thickener containing said copolymer, and method for preparing said copolymer
Rie Kiyomoto, Himeji (JP); Satoshi Nishiguchi, Tokyo (JP); Ryosuke Murakami, Himeji (JP); and Naoyuki Hashimoto, Himeji (JP)
Assigned to SUMITOMO SEIKA CHEMICALS CO., LTD., Hyogo (JP)
Appl. No. 16/643,437
Filed by SUMITOMO SEIKA CHEMICALS CO., LTD., Hyogo (JP)
PCT Filed Aug. 24, 2018, PCT No. PCT/JP2018/031290 § 371(c)(1), (2) Date Feb. 28, 2020, PCT Pub. No. WO2019/044679, PCT Pub. Date Mar. 7, 2019.
Claims priority of application No. 2017-165399 (JP), filed on Aug. 30, 2017.
Prior Publication US 2020/0207894 A1, Jul. 2, 2020
Int. Cl. C08F 220/06 (2006.01); C09K 23/52 (2022.01); A61K 8/81 (2006.01); C08F 2/08 (2006.01); A61Q 19/00 (2006.01); C08L 33/02 (2006.01)

CPC C08F 220/06 (2013.01) [C08L 33/02 (2013.01); C08L 2201/10 (2013.01)]

10 Claims

1. An alkyl-modified carboxyl group-containing copolymer being a copolymer of 100 parts by mass of a (meth)acrylic acid, 1.5 to 4.5 parts by mass of an alkyl (meth)acrylate ester having an alkyl group having 18 to 24 carbon atoms, and 0 to 0.1 parts by mass of a compound having two or more ethylenically unsaturated groups, the alkyl-modified carboxyl group-containing copolymer comprising 1.5 to 4.5 parts by mass of a nonionic surfactant

wherein the nonionic surfactant is composed of a hydrophobic moiety and a hydrophilic moiety, and

wherein the hydrophobic moiety is a type selected from the group consisting of a polyhydric alcohol fatty acid ester and an addition polymer of a hydroxy fatty acid, and

wherein the nonionic surfactant has a hydrophilic-lipophilic balance (HLB) of 5 to 8.