	US 12,247,168 B2
	Curable photochromic compositions including an oxazoline functional material
Ramaiahgari Reddy, Murrysville, PA (US); Brad S. Veldkamp, Allison Park, PA (US); and Anil Kumar, Murrysville, PA (US)
Assigned to Transitions Optical, Ltd., Tuam (IE)
Appl. No. 17/789,037
Filed by Transitions Optical, Ltd., Tuam (IE)
PCT Filed Dec. 27, 2019, PCT No. PCT/EP2019/087069 § 371(c)(1), (2) Date Jun. 24, 2022, PCT Pub. No. WO2021/129940, PCT Pub. Date Jul. 1, 2021.
Prior Publication US 2023/0059569 A1, Feb. 23, 2023
Int. Cl. C09K 9/02 (2006.01); C09D 167/04 (2006.01); C09D 169/00 (2006.01); C09J 167/04 (2006.01); C09J 169/00 (2006.01)

CPC C09K 9/02 (2013.01) [C09D 167/04 (2013.01); C09D 169/00 (2013.01); C09J 167/04 (2013.01); C09J 169/00 (2013.01)]

15 Claims

1. A curable photochromic adhesive composition comprising:

(a) an oxazoline functional material comprising at least two oxazoline groups;

(b) a carboxylic acid functional material having at least two carboxylic acid groups, and having an acid equivalent weight of greater than or equal to 600 g/mole; and

wherein an equivalents ratio of oxazoline equivalents of said oxazoline functional material to carboxylic acid equivalents of said carboxylic acid functional material, is from 0.5:1 to 10:1.