	US 12,083,195 B2
	Microparticles of cellulose nanocrystals with pigment nanoparticles bound thereto and method of production thereof
Mark P. Andrews, Westmount (CA); Timothy Morse, Toronto (CA); Monika Rak, Montreal (CA); and Mary Bateman, St. Lazare (CA)
Assigned to ANOMERA INC., Québec (CA)
Appl. No. 17/419,524
Filed by ANOMERA INC., Montréal (CA)
PCT Filed May 6, 2020, PCT No. PCT/CA2020/050604 § 371(c)(1), (2) Date Jun. 29, 2021, PCT Pub. No. WO2020/227815, PCT Pub. Date Nov. 19, 2020.
Claims priority of provisional application 62/846,302, filed on May 10, 2019.
Prior Publication US 2022/0040053 A1, Feb. 10, 2022
Int. Cl. A61K 8/02 (2006.01); A61K 8/73 (2006.01); A61Q 1/12 (2006.01)

CPC A61K 8/0275 (2013.01) [A61K 8/731 (2013.01); A61Q 1/12 (2013.01); A61K 2800/412 (2013.01); A61K 2800/413 (2013.01); A61K 2800/43 (2013.01); A61K 2800/621 (2013.01); A61K 2800/622 (2013.01)]

21 Claims

1. A microparticle comprising carboxylated, sulfated, or phosphated cellulose nanocrystals and pigment nanoparticles, wherein the cellulose nanocrystals and the pigment nanoparticles are agglomerated together thereby forming said microparticle, and wherein the pigment nanoparticles are bound directly to the surface of the cellulose nanocrystals by covalent bonding or noncovalent bonding selected from hydrogen bonding, ionic bonding, van der Waals interactions, hydrophobic interactions and combinations thereof, and without using polyelectrolyte.