	US 12,240,996 B2
	Curable photochromic composition including a segmented polymer
Stephen G. Robinson, Murrysville, PA (US); and Cathy A. Taylor, Allison Park, PA (US)
Assigned to Transitions Optical, Ltd., Tuam (IE)
Appl. No. 17/789,050
Filed by Transitions Optical, Ltd., Tuam (IE)
PCT Filed Dec. 27, 2019, PCT No. PCT/EP2019/087070 § 371(c)(1), (2) Date Jun. 24, 2022, PCT Pub. No. WO2021/129941, PCT Pub. Date Jul. 1, 2021.
Prior Publication US 2023/0048395 A1, Feb. 16, 2023
Int. Cl. C09D 5/29 (2006.01); C08G 18/22 (2006.01); C08G 18/40 (2006.01); C08G 18/44 (2006.01); C08G 18/62 (2006.01); C08G 18/73 (2006.01); C08K 5/1545 (2006.01); C09D 7/41 (2018.01); C09D 175/04 (2006.01); C09K 9/02 (2006.01)

CPC C09D 5/29 (2013.01) [C08G 18/227 (2013.01); C08G 18/4063 (2013.01); C08G 18/44 (2013.01); C08G 18/6279 (2013.01); C08G 18/73 (2013.01); C08K 5/1545 (2013.01); C09D 7/41 (2018.01); C09D 175/04 (2013.01); C09K 9/02 (2013.01); C09K 2211/1007 (2013.01); C09K 2211/1018 (2013.01)]

18 Claims

1. A curable photochromic composition comprising:

(a) a photochromic compound;

(b) a segmented polymer comprising active hydrogen groups, at least one first segment, and at least one second segment, wherein:

(i) each first segment independently comprises a fluorinated polymer segment, and

(ii) each second segment independently comprises a segment selected from the group consisting of a polycarbonate segment, a polyester segment, a polyether segment, a polyurethane segment, and a segment of copolymers thereof; and

(c) a curing agent comprising reactive functional groups that are reactive with the active hydrogen groups of the segmented polymer, wherein the curing agent comprises at least one of a polyisocyanate, a polyisothiocyanate, or an aminoplast.