	US 12,410,331 B2
	LED-curable offset inks containing aluminum additives
Christian Johnke, Karlstein am Main (DE); Kai-Uwe Gaudl, Karlstein am Main (DE); and Matthias Hellblau, Karlstein am Main (DE)
Assigned to SUN CHEMICAL B.V., Weesp (NL)
Appl. No. 18/859,926
Filed by SUN CHEMICAL B.V., LV Weesp (NL)
PCT Filed Sep. 22, 2023, PCT No. PCT/EP2023/076287 § 371(c)(1), (2) Date Oct. 24, 2024, PCT Pub. No. WO2024/068483, PCT Pub. Date Apr. 4, 2024.
Claims priority of application No. 22199131 (EP), filed on Sep. 30, 2022.
Prior Publication US 2025/0109307 A1, Apr. 3, 2025
Int. Cl. C09D 11/101 (2014.01); B41J 2/01 (2006.01); B41J 2/21 (2006.01); C09D 11/03 (2014.01); C09D 11/037 (2014.01); C09D 11/104 (2014.01); C09D 11/322 (2014.01)

CPC C09D 11/101 (2013.01) [B41J 2/01 (2013.01); B41J 2/2107 (2013.01); C09D 11/03 (2013.01); C09D 11/037 (2013.01); C09D 11/104 (2013.01); C09D 11/322 (2013.01)]

24 Claims

1. A printing ink or varnish composition comprising:

25-85% of one or more acrylates, wherein at least one acrylate is a pentaacrylate or hexaacrylate;

0-20% of one or more photoinitiators;

5-60% of one or more rosin-modified polyester resins, wherein the rosin-modified polyester resin has a molecular weight of 5,000 to 35,000 Daltons;

0.2-5% of one or more aluminum additives;

0.1-5% of one or more polymerization stabilizers; and

0-50% colorant, wherein the rosin-modified polyester resin is derived from i) a gum-rosin, wood rosin or tall oil rosin; ii) one or more difunctional acids or anhydrides; iii) one or more mono-, di-, tri- or tetra-functional polyols; and iv) one or more monofunctional acids.