Removable Radiation Cured Composition And Process For Protecting A Micro-Fluid Ejection Head
There is disclosed a removable radiation cured member suitable for use in protecting a micro-fluid ejection head. Further, a reactant mixture suitable for sealing a micro-fluid ejection head comprising a vinyl-containing oligomer, a filler, and optionally a reactive diluent and/or a photoinitiator is disclosed.
1 . A reactant mixture suitable for sealing a micro-fluid ejection head comprising:
a vinyl-containing oligomer, a filler, and optionally a reactive diluent, and/or a photoinitiator.
2 . The reactant mixture of claim 1 , wherein the vinyl-containing oligomer comprises a polymerizable functionality.
3 . The reactant mixture of claim 2 , wherein the polymerizable functionality comprises one or more of an acrylate, a methacrylate, a vinyl ether, a urethane, a siloxane, an eater, an ether, an epoxy-derived component, and an anime-containing component functionality.
4 . The reactant mixture of claim 1 , wherein the vinyl-containing oligomer comprises an acrylate oligomer.
5 . The reactant mixture of claim 1 , wherein the vinyl-containing oligomer comprises a urethane acrylate oligomer.
6 . The reactant mixture of claim 1 , wherein the vinyl-containing oligomer comprises a urethane diacrylate oligomer.
7 . The reactant mixture of claim 1 , wherein the vinyl-containing oligomer comprises about 50 wt % or more of the reactant mixture.
8 . The reactant mixture of claim 1 , wherein the vinyl-containing oligomer has a molecular weight of from about 1,500 to about 20,000 g/mole.
9 . The reactant mixture of claim 1 , wherein the vinyl-containing oligomer composes about 1 to about 6 vinyl groups per molecule.
10 . The reactant mixture of claim 1 , wherein the reactive diluent comprises one or more of an aliphatic urethane acrylate or a diacrylate of propoxylated neopentyl glycol.
11 . The reactant mixture of claim 1 , wherein the reactive diluent comprises one or more functional groups comprising a urethane, a siloxane, an ester, an ether, a metallic acrylate, a fluorine-containing component, a vinyl ether, a thiolene, an n-vinyl pyrrolidone, a styrene, a vinyl acetate, a maleic anhydride, and a maleimide.
12 . The reactant mixture of claim 1 , wherein the reactive diluent comprises one or more of isobornyl acrylate, 2(2-ethoxyethoxy)ethyl acrylate, 2,2,2-trifluoroethyl methacrylate, octadecyl vinyl ether, and trimethylolpropane tris(3-mercaptoproprionate).
13 . The reactant mixture of claim 1 , wherein the reactive diluent composes about 40 wt % or less of the reactant mixture.
14 . The reactant mixture of claim 1 , wherein the reactive diluent comprises about 1 to about 6 vinyl groups per molecule.
15 . The reactant mixture of claim 1 , wherein the reactive diluent has a molecular weight of from about 50 to about 1500 g/mol.
16 . The reactant mixture of claim 1 , wherein the filler comprises one or more of a hydrophobic fumed silica, a hydrophilic fumed silica, polymethyl methacrylate spherical beads, and polymethylsilsesquioxane.
17 . The reactant mixture of claim 1 , wherein the filler comprises one or more of a fumed silica aftertreated with a methacrylsilane, a fumed silica aftertreated with HMDS (hexamethyldisilazane), and a hydrophobic fumed silica after treated with DDS (dimethyldichlorosilane).
18 . The reactant mixture of claim 1 , wherein the filler comprises about 20 wt % or less of the reactant mixture.
19 . Use reactant mixture of claim 1 , wherein the photoinitiator comprises any suitable Norrish Type I compound, a Norrish Type II compound, or combination thereof.
20 . The reactant mixture of claim 19 , wherein the Norrish Type I compound comprises one or more of an alpha-hydroxy ketone, an acylphosphine, and an aminoalkylphenone.
21 . The reactant mixture of claim 19 , wherein the Norrish Type II compound comprises a benzophenone.
22 . The reactant mixture of claim 19 , wherein the photoinitator comprises a Norris Type II compound and a Norrish Type II co-initiator.
23 . The reactant mixture of claim 22 , wherein the Norrish Type II co-initiator comprises one or more of a primary, secondary, and ternary amine or ether.
24 . The reactant mixture of claim 1 , wherein the photoinitiator comprises about 10 wt % or less of the reactant mixture.
25 . The reactant mixture of claim 1 wherein the viscosity of the reactant mixture ranges from about 10 cps to about 10,000,000 cps at room, temperature.
26 . The reactant mixture of claim 1 wherein the viscosity of the reactant mixture ranges from about 50,000 cps to about 750,000 cps at 15 rpm.
27 . The reactant mixture of claim 1 , wherein the reactant mixture is substantially free of organic solvents.