Water-based coatings

Patent metadata

Field	Value
Publication number	US-2016333207-A1
Application number	US-201515113280-A
Country	US
Kind code	A1
Filing date	Jan 7, 2015
Priority date	Jan 24, 2014
Publication date	Nov 17, 2016
Grant date	—

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

1 . A water-based printing ink or coating composition comprising an acrylic resin emulsion and an epoxy ester resin dispersion wherein the acrylic resin 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 )(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 0-60 wt %, w between 0-60 wt %, x between 0-40 wt %, y between 1-10 wt % and z between 0.1-5 wt %.

2 . A 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 10-50 wt %, w between 10-50 wt %, x between 10-30 wt %, y between 2-8 wt % and z between 0.5-4 wt %.

3 . A 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 . A composition according to claim 1 comprising between 10-30 wt % of acrylic resin emulsion.

5 . A composition according to claim 1 comprising between 5-75 wt % of epoxy ester resin dispersion.

6 . A composition according to claim 1 comprising between 2-15 wt % of water.

7 . A composition according to claim 1 further comprising a pH sensitive crosslinker.

8 . A composition according to claim 7 wherein the pH sensitive crosslinker is dihydrazide crosslinker.

9 . A composition according to claim 7 comprising 0.1 to 1.0 wt % of dihydrazide crosslinker.

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

11 . A composition according to claim 8 wherein the dihydrazide crosslinker is adipic dihydrazide.

12 . A composition according to claim 8 further comprising a styrene maleic anhydride resin.

13 . A composition according to claim 12 wherein the styrene maleic anhydride resin is in aqueous solution.

14 . A composition according to claim 13 wherein the aqueous styrene maleic anhydride solution comprises between 70-80 wt % water.

15 . A composition according to claim 12 comprising 2-12 wt % of aqueous styrene maleic anhydride resin solution comprising between 70-80 wt % water.

16 . A composition according to claim 1 further comprising a defoamer.

17 . A composition according to claim 16 comprising 0.1-3 wt % of defoamer.

18 . A composition according to claim 1 further comprising clay.

19 . A composition according to claim 18 comprising 1-20 wt % of clay.

20 . A composition according to claim 1 further comprising 1-5 wt % of silica.

21 . (canceled)

22 . A composition according to claim 1 further comprising 1-5 wt % of dimethylethanolamine.

23 . (canceled)

24 . A 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.

25 . A 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.

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

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

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

29 . A process for preparing the printing ink or coating composition according to claim 1 comprising:
a) forming an emulsion of an acrylic resin having the general formula I by copolymerizing the monomers in water;
b) forming an epoxy ester resin dispersion by adding the epoxy ester resin to a solvent and
c) combining the acrylic resin emulsion and the epoxy resin ester dispersion to provide the composition.

30 . A process for preparing an article with a coating or an ink printed thereon which comprises:
a) applying the ink or coating composition according to claim 1 to a surface of an article and b) drying the composition.

31 . A process according to claim 30 wherein the article is a storage article is selected from the group consisting of a bag, a box, a container a sack, a packaging material or a cover.

32 . (canceled)

33 . An article with an ink or a coating thereon comprising a cured ink or coating composition according to claim 1 on a surface of the article.

34 . An article produced by a process comprising:
c) applying the ink or coating composition according to claim 1 to a surface of an article and d) drying the composition.

Assignees

• Sun Chemical Corp

Inventors

• Marshall Bruce
• Schmidt Mike
• Arcurio Ralph

Classifications

• C09D11/38

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

• B41F23/04

  by heat drying, by cooling, by applying powders {(B41F23/005 takes precedence)} · CPC title

• C09D11/037

  characterised by the pigment · CPC title

• C08K3/346

  Clay · CPC title

• C09D5/08

  Anti-corrosive paints · CPC title