Aqueous inkjet ink and receiver combination
View Patent ↗An aqueous inkjet ink and receiver combination wherein the aqueous inkjet ink comprises: a pigment; a polymer binder containing less than 25% of a hydrophilic monomer by weight of the total polymer; the binder being dispersible but insoluble in aqueous media; at least one surfactant; a humectant; and wherein the receiver comprises a non-absorbing substrate.
1. An aqueous inkjet ink and receiver combination wherein said aqueous ink jet ink comprises:
a pigment;
a polymer binder containing less than 25% of hydrophilic monomer by weight of the total polymer, the binder being dispersible but insoluble in aqueous media;
at least one surfactant;
a humectant; and wherein said receiver comprises a non-absorbing substrate.
2. The combination of claim 1 wherein the weight ratio of the pigment to the polymer binder is 1:20 to 20:1.
3. The combination of claim 1 wherein the weight ratio of the pigment to the polymer binder is 1:5 to 2:1.
4. The combination of claim 1 wherein said pigment comprises up to 10% by weight of the ink composition.
5. The combination of claim 1 wherein the pigment comprises up to 5% by weight of the ink composition.
6. The combination of claim 1 wherein the pigment has an average particle size of less than 0.5 micron.
7. The combination of claim 1 wherein the surfactant is a siliconated or a fluorinated surfactant or a mixture of both.
8. The combination of claim 1 wherein the polymer binder is a polyester, an acrylic polymer or a polyurethane.
9. The combination of claim 8 wherein the acrylic polymer comprises a hydrophilic monomer unit selected from the group consisting of acrylic acid, methacrylic acid, chloromethacrylic acid, maleic acid, allylamine, N,N-diethylallylamine, vinyl sulfonamide, sodium acrylate, sodium methacrylate, ammonium acrylate, ammonium methacrylate, acrylamidopropane-triethylammonium chloride, methacrylamidopropane-triethylammonium chloride, vinyl-pyridine hydrochloride, sodium vinyl phosphonate and sodium 1-methylvinylphosphonate, sodium vinyl sulfonate, sodium 1-methylvinyl-sulfonate and sodium styrenesulfonate, ethyoxytriethylene glycol methacrylate, methoxypolyethylene oxide methacrylate, methoxypropylene oxide acrylate, polyethyleneoxide methacrylate, polyethylenoxide acrylate and N-vinyl pyrrolidone.
10. The combination of claim 8 wherein the acrylic polymer contains at least one halogenated vinyl monomer unit.
11. The combination of claim 10 wherein the halogenated vinyl monomer is selected from vinyl chloride, vinylidene chloride, vinyl fluoride, vinylidene fluoride, vinyl bromide, vinylidene bromide, and chloromethacrylic acid.
12. The combination of claim 8 wherein the acrylic polymer is a homopolymer or copolymer.
13. The combination of claim 12 wherein the copolymer latex further contains an ethylenically-unsaturated monomer capable of addition polymerization.
14. The combination of claim 13 wherein the ethylenically-unsaturated monomer is selected from the group consisting of methyl methacrylate, ethyl methacrylate, butyl methacrylate, ethyl acrylate, butyl acrylate, hexyl acrylate, n-octyl acrylate, lauryl methacrylate, 2-ethylhexyl methacrylate, nonyl acrylate, benzyl methacrylate, 2-hydroxypropyl methacrylate, acrylonitrile, methacrylonitrile, vinyl acetate, vinyl propionate, vinylidene chloride, vinyl chloride, styrene, t-butyl styrene, vinyl toluene, butadiene, isoprene, N,N-dimethyl acrylamide, acrylic acid, methacrylic acid, chloromethacrylic acid, maleic acid, allylamine, N,N-diethylallylamine, vinyl sulfonamide, sodium acrylate, sodium methacrylate, ammonium acrylate, ammonium methacrylate, acrylamidopropane-triethylammonium chloride, methacrylamidopropane-triethylammonium chloride, vinyl-pyridine hydrochloride, sodium vinyl phosphonate and sodium 1-methylvinylphosphonate, sodium vinyl sulfonate, sodium 1-methylvinyl-sulfonate and sodium styrenesulfonate.
15. The combination of claim 1 wherein the polymer binder is a polyurethane.
16. The combination of claim 1 wherein the ink further comprises a cross-linking agent.
17. The combination of claim 16 wherein the cross-linking agent is a di- or polyamine, di- or polyhydrazide, isophorone diamine, 4,7-dioxadecene-1,10-diamine, or derivatives of dibasic acids.
18. The method of claim 16 wherein the cross-linking agent is melamine or an adduct of melamine and an aldehyde.
19. The combination of claim 17 wherein the dibasic acid is adipic dihydrazide, succinic dihydrazide, phthalica acid dihydrazide, dialkylmine derivatives of polyalkyl glycols, alkyl di- or triamines, epoxies, polyisocyanates, melamine or glycoluril.
20. The combination of claim 1 wherein the polymer binder contains at least one reactive group capable of reacting with a cross-linking agent.
21. The combination of claim 20 wherein the reactive group is an amine, carboxylic, hydroxy, epoxy, urea, urethane, or an active carbonyl.
22. The combination of claim 21 wherein the reactive group is an active carbonyl and wherein said active carbonyl is aldehyde or keto.
23. The combination of claim 1 wherein the polymer binder has a Tg of −50 to 80° C.
24. The combination of claim 1 wherein the polymer binder has an average particle size of less than 0.5 micron.
25. The combination of claim 6 wherein the polymer binder contains less than 10% of hydrophilic monomer by weight of the total polymer.
26. The combination of claim 1 wherein the polymer binder contains less than 5% of hydrophilic monomer by weight of the total polymer.
27. The combination of claim 1 wherein all monomer units in the polymer binder are hydrophobic.
28. The combination of claim 1 where the pigment is a self-dispersing pigment, an encapsulated pigment or a pigment dispersed by a dispersant.
29. The combination of claim 1 wherein the non-absorbing substrate is a plastic, glass, ceramic or metal substrate.
30. The combination of claim 29 wherein the plastic substrate is an untreated vinyl.