Ultra-stable printing and coatings using aqueous complex coacervates, and compositions and methods thereof

Patent metadata

Field	Value
Publication number	US-10767060-B2
Application number	US-201815985855-A
Country	US
Kind code	B2
Filing date	May 22, 2018
Priority date	May 22, 2017
Publication date	Sep 8, 2020
Grant date	Sep 8, 2020

Abstract

The invention provides compositions and methods for ultra-stable coating or printing from aqueous complex coacervates.

First claim

What is claimed is:

1. A method for forming a coating on a substrate, comprising:
providing an aqueous coacervate suspension comprising a polyanion or macroanion, a polycation or macrocation, and a salt;
coalescing the aqueous coacervate suspension into a homogeneous coacervate phase; and
depositing the coacervate phase on a substrate to form a coating on the substrate, wherein the polycation or macrocation comprises poly(diallyldimethyl ammonium), the polyanion or macroanion comprises poly(styrene sulfonate), and the salt comprises KBr.

2. The method of claim 1 , wherein the aqueous coacervate suspension comprises no organic solvent or co-solvent.

3. The method of claim 1 , wherein the aqueous coacervate suspension comprises no crosslinking agent.

4. The method of claim 1 , wherein the stoichiometry of polyanion or macroanion to polycation or macrocation in the aqueous coacervate suspension is from about 0.25 to about 0.75.

5. The method of claim 1 , wherein the substrate is conventional paper or cardboard.

6. The method of claim 1 , wherein the substrate is a plastic, fabric, metallic or inorganic material.

7. The method of claim 1 , wherein polycation or macrocation and polyanion or macroanion are of substantially equal length.

8. The method of claim 1 , wherein polycation or macrocation and polyanion or macroanion are of substantially different length.

9. A coating formed by the method of claim 1 .

10. The coating of claim 9 , having a substantially uniform thickness.

11. The coating of claim 10 , wherein the substantially uniform thickness is in the range from 5 nm to about 500 of μm.

12. A method for printing from an aqueous coacervate composition, comprising:
providing an aqueous coacervate suspension comprising a polyanion or macroanion, a polycation or macrocation, and a salt;
coalescing the aqueous coacervate suspension into a homogeneous coacervate phase; and
depositing the coacervate phase on a substrate to form a print on the substrate, wherein the stoichiometry of polyanion or macroanion to polycation or macrocation in the aqueous coacervate suspension is from about 0.25 to about 0.75.

13. A print formed by the method of claim 12 .

14. An aqueous ink, comprising a polyanion or macroanion, a polycation or macrocation, and a salt, wherein the polycation or macrocation comprises poly(diallyldimethyl ammonium), the polyanion or macroanion comprises poly(styrene sulfonate), and the salt comprises KBr.

15. The method of claim 12 , wherein the aqueous coacervate suspension comprises no organic solvent or co-solvent and no crosslinking agent.

16. The method of claim 12 , wherein the substrate is conventional paper or cardboard.

17. The method of claim 12 , wherein the substrate is a plastic, fabric, metallic or inorganic material.

18. The method of claim 12 , wherein the polycation or macrocation is selected from poly(diallyldimethyl ammonium), chitosan and poly(allylamine hydrochloride) and the polyanion or macroanion is selected from poly(styrene sulfonate), hyaluronic acid, poly(acrylic acid), poly(galacturonic acid) and alginate.

19. The method of claim 12 , wherein the salt is selected from NaCl, KCl, LiCl, NaBr, KBr, LiBr, NaI, KI, LiI, Na 2 SO 4 , NaNO 3 , CaCl 2 , MgCl 2 , MgSO 4 , ammonium formate, as well as transition metal salts, lanthanides, and actinides.

20. The method of claim 12 , wherein the polycation or macrocation comprises poly(diallyldimethyl ammonium), the polyanion or macroanion comprises poly(styrene sulfonate), and the salt comprises KBr.

Assignees

• Univ Massachusetts

Inventors

• Meng Xiangxi
• Perry Sarah L
• Schiffman Jessica D

Classifications

• C09D11/08 Primary

  based on natural resins · CPC title

• C09D11/38

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• C09D11/03

  characterised by features other than the chemical nature of the binder · CPC title

• C09D11/023 Primary

  Emulsion inks · CPC title

• C09D11/10

  based on artificial resins · CPC title