US 11,814,528 B2
Diester of bisphenol fluorene compounds and thermochromic pigment compositions comprising the same
Alexander Bourque, Montevrain (FR)
Assigned to Société BIC, Clichy (FR)
Appl. No. 17/278,457
Filed by Société BIC, Clichy (FR)
PCT Filed Sep. 20, 2019, PCT No. PCT/EP2019/075305
§ 371(c)(1), (2) Date Mar. 22, 2021,
PCT Pub. No. WO2020/064537, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 18306234 (EP), filed on Sep. 24, 2018.
Prior Publication US 2021/0363371 A1, Nov. 25, 2021
Int. Cl. C09D 11/50 (2014.01); C09D 11/17 (2014.01); B43K 7/00 (2006.01); B43K 29/02 (2006.01); C07C 69/28 (2006.01); C09B 57/00 (2006.01); C09B 67/22 (2006.01); C09K 9/02 (2006.01); C09B 5/00 (2006.01)
CPC C09D 11/50 (2013.01) [B43K 7/00 (2013.01); B43K 29/02 (2013.01); C07C 69/28 (2013.01); C09B 5/00 (2013.01); C09B 67/0033 (2013.01); C09D 11/17 (2013.01); C09K 9/02 (2013.01); C07C 2603/18 (2017.05); C09K 2211/1007 (2013.01); C09K 2211/1011 (2013.01)] 20 Claims
OG exemplary drawing
 
1. Method of regulating temperature change in a thermochromic ink composition, comprising incorporating into the composition a compound represented by the following formula (I):

OG Complex Work Unit Chemistry
wherein R1 and R2, identical or different, represent a C2-C30 alkyl group, a C2-C30 alkenyl group, a C2-C30 alkynyl group, or a C2-C30 alkoxy group, wherein the groups are optionally substituted with at least one hydroxy, halogen, amino, C1-C8 alkyl, or C1-C8 alkoxy group.