Electrically conductive UV-curable ink
View Patent ↗An ultraviolet or electron beam curable conductive material for use in the electronics industry. The conductive material has a low viscosity and is capable of application to a substrate by high speed printing techniques such as flexography and rotogravure and provides high electrical conductivity following cure. The conductive material comprises one or more oligomers, one or more acrylate carriers, one or more reactive monomers such as vinyl ether, conductive filler and one or more photoinitiators. Optional additional ingredients, such as diluents, dispersants, etc. may be added as desired.
1. A composition comprising one or more chlorinated polyester oligomers, one or more acrylate carriers, hydroxybutylvinylether, one or more conductive fillers and one or more photoinitiators.
2. The composition of claim 1 , further comprising one or more leveling agents.
3. The composition of claim 2 , wherein the one or more leveling agents are selected from the group consisting of acrylate copolymers; polyether modified polydimethylsiloxane; polyether modified dimethylsiloxane; polyurethane derivative or modified polyurethane; solvent-free anionic aliphatic ester; modified polyurethane dispersant; monofunctional oleo alkylene oxide block copolymer; polymeric dispersant; polyether amido acid polyamine derivative; polyacrylate and polyurethane, and mixtures thereof.
4. The composition of claim 2 , wherein the leveling agent comprises in the range of about 0.1 to about 5 weight percent of the composition.
5. The composition of claim 4 , wherein the leveling agent comprises in the range of about 0.1 to about 1.5 weight percent of the composition.
6. The composition of claim 1 , wherein the one or more acrylate carriers is selected from the group consisting of diacrylates, triacrylates, tetraacrylates and mixtures thereof.
7. The composition of claim 6 , wherein the acrylate carrier is trimethylolpropane triacrylate.
8. The composition of claim 1 , wherein the conductive filler is silver flakes.
9. The composition of claim 1 , wherein the photoinitiator is chosen from the group consisting of 1-hydroxy-cyclohexyl-phenylketone; 2-hydroxy-2-methyl-1-phenyl-1-propanone; 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methyl-1-propanone; alpha, alpha-dimethoxy-alpha-phenylacetophenone; 2-benzyl-2-(dimethylamino)-1-[4(4-morpholinyl)-1-butanone; 2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholinyl)-1-propanone; diphenyl(2,4,6-trimethylbenzoyl)-phosphine oxide; phosphine oxide, phenyl bis(2,4,6-trimethyl benzoyl; phosphine oxide; lodonium; 4-methylphenyl[4-(2-methylpropyl) phenyl]-hexafluorophosphate; mixed arylsulfonium hexafluoroantimonate salts; mixed arylsulfonium hexofluorophosphate salts, benzophenone; 4-phenyl benzophenone; 4-methyl benzophenone; 2-isopropyl thioxanthone; 2-chlorothioxanthone; 2,4-diethylthioxanthone; 2-dimethylamino-ethylbenzoate; ethyl-4-(dimethylamino)benzoate; 2-ethyl-4-(dimethylamino)benzoate; isoamyl 4-(N,N-dimethylamino)benzoate and mixtures thereof.
10. The composition of claim 1 , wherein the oligomers comprise in the range of about 5 to about 20 weight percent of the composition.
11. The composition of claim 10 wherein the oligomers comprise in the range of about 5 to about 15 weight percent of the composition.
12. The composition of claim 1 , wherein the acrylate carrier comprises in the range of about 0.1 to about 5 weight percent of the composition.
13. The composition of claim 12 , wherein the acrylate carrier comprises in the range of about 0.1 to about 1.5 weight percent of the composition.
14. The composition of claim 1 , wherein the reactive monomer comprises in the range of about 5 to about 20 weight percent of the composition.
15. The composition of claim 14 , wherein the reactive monomer comprises in the range of about 5 to about 15 weight percent of the composition.
16. The composition of claim 1 , wherein the conductive filler comprises in the range of about 40 to about 80 weight percent of the composition.
17. The composition of claim 16 , wherein the conductive filler comprises in the range of about 30 to about 50 weight percent of the composition.
18. The composition of claim 1 , wherein the photoinitiator comprises in the range of about 0.1 to about 5 weight percent of the composition.
19. The composition of claim 18 , wherein the photoinitiator comprises in the range of about 0.1 to about 1.5 weight percent of the composition.