Water-based coatings

Patent metadata

Field	Value
Publication number	US-10655026-B2
Application number	US-201515113280-A
Country	US
Kind code	B2
Filing date	Jan 7, 2015
Priority date	Jan 24, 2014
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

The present invention is directed to a water-based printing ink or coating composition comprising an acrylic resin emulsion and an epoxy ester resin dispersion. The present invention also provides a process for preparing the printing ink or coating composition comprising forming an emulsion of an acrylic resin having the general formula I by copolymerizing monomers in water, forming an epoxy ester resin dispersion by adding the epoxy ester resin to a solvent and combining the acrylic resin emulsion and the epoxy resin ester dispersion to provide the composition. Finally the present invention provides a process for preparing an article with a coating or an ink printed thereon which comprises applying the ink or coating composition to a surface of an article and drying the composition. The compositions exhibit a high degree of alkali resistance, acid resistance and/or water softener resistance.

First claim

We claim:

1. A water-based printing ink or coating composition comprising an acrylic resin emulsion and an epoxy ester resin dispersion wherein the acrylic resin in the acrylic resin emulsion consists of an acrylic resin that has the general formula I:
[—CH 2 —CH(CO 2 C 4 H 9 )—] V [—CH 2 —C(CH 3 )(CO 2 (CH 3 )—] W [—CH 2 —CH(C 6 H 5 )—] X

[—CH 2 —CH(CONHC(CH 3 ) 2 (CH 2 COCH 3 )—] Y [—CH 2 —C(CH 3 )(CO 2 H)—] Z    Formula I

and wherein the monomer units v, w, x, y and z are present in the copolymer in the amounts of v between 10-50 wt %, w between 10-50 wt %, x between 10-30 wt %, y between 1-10 wt % and z between 0.1-5 wt %; and
wherein the ink or coating composition comprises between 10-30 wt % of acrylic resin emulsion, and between 5-75 wt % of epoxy ester resin dispersion.

2. The composition according to claim 1 wherein the monomer units y and z are present in the copolymer in the amounts of y between 2-8 wt % and z between 0.5-4 wt %.

3. The composition according to claim 1 wherein the monomer units v, w, x, y and z are present in the copolymer in the amounts of v between 30-40 wt %, w between 30-40 wt %, x between 15-25 wt %, y between 5-7 wt % and z between 1-3 wt %.

4. The composition according to claim 1 comprising between 2-15 wt % of water.

5. The composition according to claim 1 further comprising a pH sensitive crosslinker.

6. The composition according to claim 5 wherein the pH sensitive crosslinker is dihydrazide crosslinker.

7. The composition according to claim 5 comprising 0.1 to 1.0 wt % of dihydrazide crosslinker.

8. The composition according to claim 6 wherein the acrylic resin to dihydrazide crosslinker has a weight ratio of between 25:1 to 50:1.

9. The composition according to claim 6 wherein the dihydrazide crosslinker is adipic dihydrazide.

10. The composition according to claim 6 further comprising a styrene maleic anhydride resin.

11. The composition according to claim 10 wherein the styrene maleic anhydride resin is in an aqueous solution before combining with composition.

12. The composition according to claim 11 wherein the aqueous styrene maleic anhydride solution comprises between 70-80 wt % water content as calculated before combining with composition.

13. The composition according to claim 1 further comprising a 2-12 wt % of aqueous styrene maleic anhydride resin solution comprising between 70-80 wt % water content as calculated before combining with composition.

14. The composition according to claim 1 further comprising a defoamer.

15. The composition according to claim 14 comprising 0.1-3 wt % of defoamer.

16. The composition according to claim 1 further comprising clay.

17. The composition according to claim 16 comprising 1-20 wt % of clay.

18. The composition according to claim 1 further comprising 1-5 wt % of silica.

19. The composition according to claim 1 further comprising 1-5 wt % of dimethylethanolamine.

20. The composition according to claim 1 further comprising a further polymeric component selected from the group consisting of alkyd, rosinated alkyd, polyester, acrylic, epoxy, melamine-formaldehyde, urea-formaldehyde, nitrocellulose, cellulosic, polyester-urethane and urethane.

21. The composition according to claim 1 further comprising one or more oxygen-containing water-tolerant solvents selected from the group consisting of 1-propoxy-2-propanol, n-propanol, isopropanol and ethyl alcohol.

22. The composition according to claim 1 further comprising components selected from one or more organic or inorganic pigments or dyes, pigment dispersants and surfactants.

23. The composition according to claim 1 which is essentially free of aziridine or metal oxide/alkoxide crosslinkers.

24. The composition according to claim 1 wherein the acrylic resin emulsion has a D90 mean particle size below about 100 nm.

Assignees

• Marshall Bruce
• Schmidt Mike
• Arcurio Ralph
• Sun Chemical Corp

Inventors

• Marshall Bruce
• Schmidt Mike
• Arcurio Ralph

Classifications

• C09D11/322

  Pigment inks · CPC title

• C08K3/36

  Silica · CPC title

• C08L2312/00

  Crosslinking · CPC title

• C09D11/107 Primary

  from unsaturated acids or derivatives thereof · CPC title

• C08L2201/54

  Aqueous solutions or dispersions · CPC title