US 12,202,994 B2
Thermochromic pigment compositions
Christelle Debrauwer, Saint Germain sur Morin (FR); Anne-Lise Damiano, Lagny sur Marne (FR); Alexander Bourque, Montevrain (FR); Francois Foulonneau, Bordeaux (FR); and Guillaume Chollet, Leognan (FR)
Assigned to SOCIETE BIC, Clichy (FR)
Appl. No. 16/608,321
Filed by SOCIETE BIC, Clichy (FR)
PCT Filed Apr. 24, 2018, PCT No. PCT/FR2018/051033
§ 371(c)(1), (2) Date Mar. 21, 2022,
PCT Pub. No. WO2018/197809, PCT Pub. Date Nov. 1, 2018.
Claims priority of application No. 1753680 (FR), filed on Apr. 27, 2017.
Prior Publication US 2021/0102083 A1, Apr. 8, 2021
Int. Cl. C09D 11/50 (2014.01); B41M 5/337 (2006.01); C07C 69/612 (2006.01); C07C 69/616 (2006.01); C09D 11/17 (2014.01); B41M 5/30 (2006.01); B41M 5/327 (2006.01); B41M 5/333 (2006.01)
CPC C09D 11/50 (2013.01) [B41M 5/3375 (2013.01); C07C 69/612 (2013.01); C07C 69/616 (2013.01); C09D 11/17 (2013.01); B41M 5/305 (2013.01); B41M 5/3275 (2013.01); B41M 5/3335 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A thermochromic pigment composition comprising:
(A) at least one electron-donor organic dye compound,
(B) at least one electron-acceptor compound, and
(C) at least one compound responding to the following formula (I):

OG Complex Work Unit Chemistry
wherein:
R1 represents H or a phenyl group,
R2 represents H or a phenyl group, and
n=1-8.