	US 12,392,088 B2
	Aqueous slurry for a coating colour composition for paper, board or the like
Jaakko Hiltunen, Espoo (FI); Annaleena Kokko, Espoo (FI); and Tapio Honkanen, Espoo (FI)
Assigned to KEMIRA OYJ, Helsinki (FI)
Appl. No. 18/019,894
Filed by KEMIRA OYJ, Helsinki (FI)
PCT Filed Sep. 16, 2021, PCT No. PCT/FI2021/050612 § 371(c)(1), (2) Date Feb. 6, 2023, PCT Pub. No. WO2022/058655, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. 20205902 (FI), filed on Sep. 18, 2020.
Prior Publication US 2023/0313465 A1, Oct. 5, 2023
Int. Cl. D21H 19/52 (2006.01); D21H 21/08 (2006.01); D21H 21/28 (2006.01)

CPC D21H 19/52 (2013.01) [D21H 21/08 (2013.01); D21H 21/28 (2013.01)]

12 Claims

1. An aqueous slurry for manufacture of a coating colour composition for paper or board, the slurry comprising inorganic mineral particles and a dispersion agent, which is an anionic lignin-carbohydrate complex, where lignin and one or more carbohydrates are covalently bound with each other, wherein the one or more carbohydrates in the anionic lignin-carbohydrate complex are formed from monosaccharides and the lignin-carbohydrate complex has a weight average molecular weight MW >8000 g/mol, wherein the lignin-carbohydrate complex has a lignin:carbohydrate ratio from 90:10 to 10:90, and wherein the difference between a first viscosity value, measured for the slurry immediately after its preparation, and a second viscosity value, measured for the slurry after 2 hours, is less than 10%.