	US 12,083,211 B2
	Methods of increasing the volume of a fiber, such as mammalian hair, and/or altering the structure of a fiber with a chitosan polyelectrolyte complex
Andrew Savaides, Stamford, CT (US); Rushi Tasker, Stamford, CT (US); Mona Vaidya, Stamford, CT (US); and Jasmine Martich, Stamford, CT (US)
Assigned to HENKEL AG & CO. KGAA, (DE)
Filed by Henkel AG & Co. KGaA, Duesseldorf (DE)
Filed on Jun. 30, 2020, as Appl. No. 16/917,087.
Prior Publication US 2021/0401720 A1, Dec. 30, 2021
Int. Cl. A61K 8/34 (2006.01); A61K 8/65 (2006.01); A61K 8/73 (2006.01); A61Q 5/06 (2006.01)

CPC A61K 8/736 (2013.01) [A61K 8/347 (2013.01); A61K 8/65 (2013.01); A61Q 5/06 (2013.01)]

16 Claims

1. A method of increasing the volume of a fiber comprising: applying to the fiber a chitosan cross linked with an aldehyde-bearing compound, and in a separate step,

a polyanion, and

drying the fiber to form a polyelectrolyte complex between the chitosan cross linked with an aldehyde-bearing compound and the polyanion on the fiber that increases the dimension of the fiber wherein the drying step is carried out at about 21° C.