US 11,708,464 B2
Poly (amino acid) rheology modifier compositions and methods of use
Jeremy J. Minty, Ann Arbor, MI (US); Samuel Kohley, Ann Arbor, MI (US); Daniel Lee, Arlington, VA (US); and Harry Poppick, Ann Arbor, MI (US)
Assigned to Ecovia Renewables Inc., Ann Arbor, MI (US)
Appl. No. 16/616,815
Filed by Ecovia Renewables Inc., Ann Arbor, MI (US)
PCT Filed May 25, 2018, PCT No. PCT/US2018/034678
§ 371(c)(1), (2) Date Nov. 25, 2019,
PCT Pub. No. WO2018/222545, PCT Pub. Date Dec. 6, 2018.
Claims priority of provisional application 62/511,994, filed on May 27, 2017.
Prior Publication US 2020/0095386 A1, Mar. 26, 2020
Prior Publication US 2021/0040275 A9, Feb. 11, 2021
Int. Cl. C08J 3/12 (2006.01); C08J 3/24 (2006.01); A23L 29/20 (2016.01); C09D 7/43 (2018.01); C09K 8/68 (2006.01); C09K 8/70 (2006.01); A61K 8/02 (2006.01); A61K 47/42 (2017.01); C04B 16/04 (2006.01); C04B 24/12 (2006.01); C09D 11/04 (2006.01); C04B 24/26 (2006.01); C11D 3/37 (2006.01); A61K 8/88 (2006.01); C09K 8/035 (2006.01); A01N 25/00 (2006.01); A61Q 19/00 (2006.01); C04B 103/00 (2006.01)
CPC C08J 3/124 (2013.01) [A01N 25/00 (2013.01); A23L 29/20 (2016.08); A61K 8/0241 (2013.01); A61K 8/88 (2013.01); A61K 47/42 (2013.01); A61Q 19/00 (2013.01); C04B 16/04 (2013.01); C04B 24/12 (2013.01); C04B 24/2652 (2013.01); C08J 3/24 (2013.01); C09D 7/43 (2018.01); C09D 11/04 (2013.01); C09K 8/035 (2013.01); C09K 8/685 (2013.01); C09K 8/70 (2013.01); C11D 3/3719 (2013.01); A23V 2002/00 (2013.01); A61K 2800/10 (2013.01); A61K 2800/41 (2013.01); A61K 2800/48 (2013.01); A61K 2800/546 (2013.01); C04B 2103/0079 (2013.01); C08J 2377/04 (2013.01)] 5 Claims
 
1. A method of preparing a rheology modifier comprising:
cross-linking a poly(amino acid) with a cross-linker to produce a cross-linked poly(amino acid) and simultaneously drying the cross-linked poly(amino acid) by heating a solution of the poly(amino acid) and a cross-linker in water at a temperature at which the water evaporates and the cross-linker crosslinks the poly(amino acid) to form a dried resin including the cross-linked poly(amino acid);
dispersing the dried resin in water to rehydrate the dried resin with the cross-linked poly(amino acid); and
grinding the rehydrated cross-linked poly(amino acid) to have a mean equivalent diameter when fully swollen in deionized water of up to about 1000 μm, as measured by laser diffraction.