Energy curable inks with improved adhesion and a method for formulating

Patent metadata

Field	Value
Publication number	US-2016333203-A1
Application number	US-201415107775-A
Country	US
Kind code	A1
Filing date	Dec 19, 2014
Priority date	Jan 8, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

Provided are energy curable inks and coatings, comprising acrylated silicone and monomers/oligomers containing acrylate functional groups, that have improved adhesion on flexible substrates, such as non-chemical coated flexible films at fast speed. The energy curable inks and coatings have a robust slide angle upon surface abrasion, resulting in a reduction of the slippage of printed substrates, such as bags, when piled on top of each other. Also provided are raw material screening methods for quantifying acrylate group concentration, which is used to adjust the ink or coating formula to improve the cure at the surface and bottom and to improve tape adhesion and MEK resistance of energy cured inks and coatings.

First claim

1 . An energy curable printing ink or coating composition, comprising:
a) an acrylated silicone; and b) a monomer containing an acrylate group or oligomer containing an acrylate group, or a combination thereof;
wherein the composition has a relative acrylate group concentration >4.0.

2 . The energy curable printing ink or coating composition of claim 1 , wherein the monomer is present in an amount of up to 75 wt % based on the weight of the composition.

3 . The energy curable printing ink or coating composition of claim 1 , wherein the oligomer is present in an amount of up to 50 wt % based on the weight of the composition.

4 . The energy curable printing ink or coating composition of claim 1 , wherein the monomer is selected from the group consisting of propoxylated neopentyl glycol diacrylate, 1,6-hexanediol diacrylate, hexanediol diacrylate, dipentaerythritol hexaacrylate, ethoxylated hexanediol diacrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, dipropylene glycol diacrylate and combinations thereof.

5 . The energy curable printing ink or coating composition of claim 1 , wherein the oligomer is selected from the group consisting of an acidic acrylate, epoxy acrylate, polyester acrylate, ethoxylated acrylate, unsaturated polyester, polyamide acrylate, polyimide acrylate and urethane acrylate and combinations thereof.

6 . The energy curable printing ink or coating composition of claim 1 , wherein the acrylated silicone is present in an amount of up to 1 wt %.

7 . The energy curable printing ink or coating composition of claim 1 , wherein the acrylated silicone is selected from the group consisting of Tego Rad 2010, 2011, 2200N, 2250, 2300, 2500, 2600, and 2700, and BYK—UV 3500, 3505, 3530, 3570, 3575, and 3576.

8 . The energy curable printing ink or coating composition of claim 1 , wherein the slide angle from the first slide to the third slide drops by no more than 5°.

9 . The energy curable printing ink or coating composition of claim 1 , further comprising an acidic or amine modified adhesion promoter.

10 . The energy curable printing ink or coating composition of claim 1 , further comprising a pigment or dye or a combination thereof.

11 . The energy curable printing ink or coating composition of claim 1 , further comprising one or more materials selected from a photoinitiator, resin, oil, talc, pigment dispersant, gelled vehicle, a polyvinylethyl ether and poly(n-butyl) acrylate, a wax, ammonia, a defoamer, a stabilizer, a non-acrylated silicone and a plasticizer and combinations thereof.

12 . The energy curable printing ink or coating composition of claim 1 , wherein the relative acrylate group concentration is >4.25.

13 . The energy curable printing ink or coating composition of claim 1 , wherein the relative acrylate group concentration is >4.5.

14 . The energy curable printing ink or coating composition of claim 1 , wherein the relative acrylate group concentration is >4.75.

15 . The energy curable printing ink or coating composition of claim 1 , wherein the relative acrylate group concentration is >5.0.

16 . The energy curable printing ink or coating composition of claim 1 , wherein the relative acrylate group concentration is >5.25.

17 . The energy curable printing ink or coating composition of claim 1 , wherein the relative acrylate group concentration is >5.5.

18 . The energy curable printing ink or coating composition of claim 1 , wherein the composition includes monomer and oligomer and a ratio of monomer:oligomer X:Y is from 0.1:10 to 100:0.1, wherein X ranges from 0.1 to 100 and Y ranges from 0.1 to 10.

19 . The energy curable printing ink or coating composition of claim 1 , wherein viscosity of the ink or coating is 2,000 cP or less when measured at 25° C. at a shear rate of 100 sec-1.

20 . A method of formulating an energy curable printing ink or coating composition, comprising combining an acrylated silicone with a monomer containing an acrylate group or oligomer containing an acrylate group or a combination thereof, wherein the ink or coating composition has a relative acrylate group concentration >4.0.

21 . The method of claim 20 , wherein the ink or coating composition exhibits a slide angle from the first slide to the third slide that drops by no more than 5°.

22 . The method of claim 20 , wherein the relative acrylate group concentration is >4.25.

23 . The method of claim 20 , wherein the relative acrylate group concentration is >4.5.

24 . The method of claim 20 , wherein the relative acrylate group concentration is >4.75.

25 . The method of claim 20 , wherein the relative acrylate group concentration is >5.00.

26 . The method of claim 20 , wherein the relative acrylate group concentration is >5.25.

27 . The method of claim 20 , wherein the relative acrylate group concentration is >5.50.

28 . The method of claim 20 , wherein the ink or coating is formulated to have a viscosity suitable for deposition by a process selected from the group consisting of flexographic, lithographic, gravure, roller coating, cascade coating, curtain coating, slot coating, wire bound bar and digital.

29 . The method of claim 28 , wherein the deposition process is flexographic.

30 . The method of claim 20 , wherein the ink or coating is formulated to be curable by any one of UV, LED, H—UV and EB radiation or a combination thereof.

31 . The method of claim 30 , wherein the ink or coating is curable by UV radiation.

32 . The method of claim 20 , wherein the viscosity of the ink or coating is 2,000 cP or less when measured at 25° C. at a shear rate of 100 sec-1.

33 . A printed article comprising a cured ink or coating of claim 1 .

Assignees

• Sun Chemical Corp

Inventors

• Zhang Yuemei
• Webster Glenn
• Schottland Philippe

Classifications

• C09D11/107

  from unsaturated acids or derivatives thereof · CPC title

• C09D11/322

  Pigment inks · CPC title

• C09D11/101 Primary

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title

• C09D11/102

  containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds · CPC title

• C09D11/037

  characterised by the pigment · CPC title