	US 12,435,230 B2
	De-inkable inks with high bio-renewable content
Paul Wallace, South Normanton (GB)
Assigned to SUN CHEMICAL B.V., Weesp (NL)
Appl. No. 18/995,435
Filed by SUN CHEMICAL B.V., LV Weesp (NL)
PCT Filed Nov. 14, 2023, PCT No. PCT/GB2023/052974 § 371(c)(1), (2) Date Jan. 16, 2025, PCT Pub. No. WO2024/105376, PCT Pub. Date May 23, 2024.
Claims priority of application No. 2216946 (GB), filed on Nov. 14, 2022.
Prior Publication US 2025/0257230 A1, Aug. 14, 2025
Int. Cl. C09D 11/322 (2014.01); C08K 5/00 (2006.01); C08K 5/053 (2006.01); C08K 5/09 (2006.01); C09D 9/00 (2006.01); C09D 11/38 (2014.01); D21C 5/02 (2006.01)

CPC C09D 11/322 (2013.01) [C08K 5/0041 (2013.01); C08K 5/0058 (2013.01); C08K 5/053 (2013.01); C08K 5/09 (2013.01); C09D 9/00 (2013.01); C09D 11/38 (2013.01); D21C 5/027 (2013.01); C08K 2201/005 (2013.01)]

23 Claims

1. A printing ink composition comprising one or more keratin-based pigment(s) and water, wherein the one or more keratin-based pigment(s) has an average particle size of no more than 3000 nm, wherein average particle size is Dv50 measured by dynamic light scattering wherein the keratin-based pigment(s) are milled.