High bio-renewable content printing inks

Patent metadata

Field	Value
Publication number	US-11820902-B2
Application number	US-202017774517-A
Country	US
Kind code	B2
Filing date	Dec 23, 2020
Priority date	Dec 30, 2019
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

The present invention provides compositions, such as varnishes, ink vehicles, and finished inks, having high bio-renewable carbon (BRC) content. The compositions comprise protein and colophony.

First claim

What is claimed:

1. A water-soluble varnish, comprising:
(a) 5 wt % to 20 wt % one or more neutralized unsaturated organic acids, based on the total weight of the varnish; wherein the unsaturated organic acid is in the form of colophony; and wherein the colophony comprises, in its structure, unsaturated acid containing isomers of abietic acid;
(b) 40 wt % to 80 wt % water, based on the total weight of the varnish; and
(c) 5 wt % to 20 wt % one or more proteins, based on the total weight of the varnish, wherein the protein is solubilized in an acid-water medium to form chemically modified cysteine that does not form disulfide bonds;
wherein the varnish comprises equal to or greater than 90% bio-renewable carbon (BRC) content.

2. The varnish of claim 1 , wherein the protein is selected from the group consisting of soy, albumin, hemp, pea, potato, wheat gluten, rice, and combinations thereof.

3. The varnish of claim 1 , comprising equal to or greater than 95% BRC content.

4. The varnish of claim 1 , comprising 100% BRC content.

5. The water-soluble varnish of claim 1 , comprising 10 wt % to 20 wt % one or more proteins, based on the total weight of the varnish, wherein the protein is solubilized in an acid-water medium to form chemically modified cysteine that does not form disulfide bonds.

6. The varnish of claim 1 , wherein the protein comprises neutralized anionic moieties.

7. The varnish of claim 6 , wherein the anionic moieties are neutralized with ammonia or a volatile amine.

8. The varnish of claim 1 , further comprising one or more neutralizing agents; and wherein the neutralizing agent is present in an amount of 1 wt % to 20 wt %.

9. The varnish of claim 8 , wherein the neutralizing agent is selected from the group consisting of ammonia, higher amines, and combinations thereof.

10. The varnish of claim 1 , further comprising one or more additives selected from the group consisting of waxes, defoamers, silicones, coefficient of friction adjusting additives, adhesion promoters, stabilizers, optical brighteners, de-gassing additives, flow promoters, antioxidants, surfactants, dispersants, plasticizers, rheological additives, and combinations thereof; wherein the additives, when the additive is present, are each individually present in an amount of 0.1 wt % to 5 wt %, based on the total weight of the varnish; wherein one or more of the additives are natural materials; and
wherein the natural materials have a BRC content of 70% to 100%.

11. The varnish of claim 10 , wherein the waxes are selected from the group consisting of amide wax, erucamide wax, polypropylene wax, paraffin wax, polyethylene wax, polytetrafluoroethylene wax, carnuba wax, soybean wax, and combinations thereof.

12. A printed substrate comprising the varnish of claim 1 .

13. An article comprising the printed substrate of claim 12 .

14. The article of claim 13 , wherein the article is a packaging material.

15. A method of printing a substrate, comprising the steps of:
(a) providing a substrate;
(b) providing the varnish of claim 1 ;
(c) applying the varnish on the substrate; and
(d) drying or curing the varnish on the substrate.

16. An ink vehicle comprising the varnish of claim 1 , and an emulsion polymer; wherein the varnish is present in an amount of 10 wt % to 80 wt %, and the emulsion polymer is present in an amount of 5 wt % to 50 wt %, based on the total weight of the ink vehicle.

17. The ink vehicle of claim 16 , wherein the emulsion polymer is based on styrene and acrylates.

18. The ink vehicle of claim 16 , wherein equal to or greater than 45% of the carbon containing materials are in the form of bio-renewable carbon.

19. A finished ink comprising the ink vehicle of claim 18 ; wherein (a) the finished ink consists of the ink vehicle and is a clear finished ink; or (b) the finished ink comprises:
i. 30 wt % to 99 wt % of the ink vehicle, based on the total weight of the finished ink; and
ii. 1 wt % to 70 wt % one or more colorants, based on the total weight of the finished ink.

20. The finished ink of claim 19 , wherein the ink vehicle is present in an amount of 50 wt %, based on the total weight of the finished ink, and the colorant is present in an amount of 50 wt %, based on the total weight of the finished ink.

21. The finished ink of claim 19 , wherein equal to or greater than 45% of the carbon containing materials are in the form of bio-renewable carbon.

22. A printed substrate comprising the finished ink of claim 19 .

23. An article comprising the printed substrate of claim 22 .

24. The article of claim 23 , wherein the article is a packaging material.

25. A method of printing a substrate, comprising the steps of:
(a) providing a substrate;
(b) providing the finished ink of claim 22 ;
(c) applying the finished ink on the substrate; and
(d) drying or curing the finished ink on the substrate.

Assignees

• Sun Chemical Corp

Inventors

• Vanoudenhoven Guy

Classifications

• C09D11/04 Primary

  based on proteins · CPC title

• B41M5/0023

  Digital printing methods characterised by the inks used (inks per se C09D11/00) · CPC title

• B65D65/42

  Applications of coated or impregnated materials · CPC title

• C09D11/023

  Emulsion inks · CPC title

• C09D11/033

  characterised by the solvent · CPC title