	US 12,454,594 B2
	Block copolymer with improved resistance to sebum
Blandine Testud, Serquigny (FR); and Quentin Pineau, Serquigny (FR)
Assigned to ARKEMA FRANCE, Puteaux (FR)
Appl. No. 17/614,835
Filed by Arkema France, Colombes (FR)
PCT Filed May 27, 2020, PCT No. PCT/FR2020/050888 § 371(c)(1), (2) Date Nov. 29, 2021, PCT Pub. No. WO2020/240132, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 1905746 (FR), filed on May 29, 2019.
Prior Publication US 2022/0242994 A1, Aug. 4, 2022
Int. Cl. C08F 293/00 (2006.01); C08L 77/12 (2006.01)

CPC C08F 293/00 (2013.01) [C08L 77/12 (2013.01)]

15 Claims

1. A sebum-resistant block copolymer, wherein it comprises rigid blocks and flexible blocks comprising at least 50% by weight of PCL, based on the total weight of flexible blocks, which represents 100%, wherein the PCL is a polycaprolactone polyol,

wherein the flexible blocks (FB) comprise, further to PCL, at least one of the following polymers: polyether; polyester; polysiloxane; polyolefin; polycarbonate; and mixtures thereof.