Ink composition with pH responsive resin particles
Ink compositions are provided which may comprise water; resin particles; a colorant; and optionally, a wax, wherein the resin particles comprise a polymerization product of reactants comprising a dioxane/dioxalane monomer and an additional monomer, wherein the dioxane/dioxalane monomer is an ester of (meth)acrylic acid with an alcohol comprising a dioxane moiety, an ester of (meth)acrylic acid with an alcohol comprising a dioxalane moiety, or both.
1. An ink composition comprising water; resin particles; a colorant; and optionally, a wax, wherein the resin particles comprise a polymerization product of reactants comprising a dioxane/dioxalane monomer and an additional monomer, wherein the dioxane/dioxalane monomer is an ester of (meth)acrylic acid with an alcohol comprising a dioxane moiety, an ester of (meth)acrylic acid with an alcohol comprising a dioxalane moiety, or both, wherein the water is present at an amount of at least about 50 weight %.
2. The ink composition of claim 1 , wherein the alcohol comprising the dioxane moiety or the alcohol comprising the dioxalane moiety is an acetal of a triol, a ketal of a triol, or a carbonate of a triol.
3. The ink composition of claim 2 , wherein the triol is glycerol or trimethylolpropane.
4. The ink composition of claim 1 , wherein the dioxane/dioxalane monomer has Formula I or Formula II,
wherein R is selected from a group consisting of hydrogen and methyl; R′ is selected from a group consisting of hydrogen and ethyl; and Z is selected from a group consisting of hydrogen, an oxygen of a carbonyl group, an alkyl group, an aryl group, and an alkoxy group.
5. The ink composition of claim 1 , wherein the dioxane/dioxalane monomer is selected from a group consisting of glycerol formal (meth)acrylate, trimethylolpropane formal (meth)acrylate, isopropylideneglycerol (meth)acrylate, and combinations thereof.
6. The ink composition of claim 1 , wherein the dioxane/dioxalane monomer is glycerol formal (meth)acrylate.
7. The ink composition of claim 1 , wherein the resin particles have a D 50 particle size that is dependent upon a pH of a latex comprising water and the resin particles.
8. The ink composition of claim 1 , wherein the resin particles have a D 50 particle size at about pH 3 of no greater than about 90 nm.
9. The ink composition of claim 1 , wherein the ink composition is free of silica particles, a water-soluble resin or emulsion thereof, a water-borne binder, a polymeric dispersant, and combinations thereof.
10. The ink composition of claim 1 , exhibiting a gloss differential of less than about 5 units; a wet rub resistance of at least about 10 as measured using an about 4.5 ng drop of the ink composition; or both.
11. The ink composition of claim 1 , exhibiting a time before gelation upon exposure to air of at least about 2 hours.
12. The ink composition of claim 1 , wherein the ink composition is an aqueous inkjet ink composition.
13. The ink composition of claim 1 , wherein the reactants further comprise styrene, an alkyl (meth)acrylate, an acidic monomer, and a reactive surfactant, wherein one of these is the additional monomer.
14. An ink composition comprising water; resin particles; a colorant; and optionally, a wax, wherein the resin particles comprise a polymerization product of reactants comprising a dioxane/dioxalane monomer and an additional monomer, wherein the dioxane/dioxalane monomer is glycerol formal (meth)acrylate.
15. The ink composition of claim 14 , wherein the reactants further comprise
styrene; an alkyl (meth)acrylate; and methacrylic acid, styrene sulfonic acid, or both, wherein one of these is the additional monomer;
a reactive surfactant;
a multifunctional monomer; and
optionally, a chain transfer agent, an initiator, or both.
16. The ink composition of claim 15 , wherein the glycerol formal (meth)acrylate is present at an amount of from about 2 weight % to about 18 weight %;
the styrene and the alkyl (meth)acrylate are present, together, at an amount of from about 70 weight % to about 97 weight %;
the methacrylic acid, the styrene sulfonic acid, or both, are present, together, at an amount of from about 2 weight % to about 20 weight %; and
the multifunctional monomer is present at an amount of from about 0.001 weight % to about 1 weight %.
17. The ink composition of claim 16 , wherein the resin particles consist of the polymerization product of the reactants and the reactants consist of the glycerol formal (meth)acrylate; the styrene; the alkyl (meth)acrylate; the methacrylic acid, the styrene sulfonic acid, or both; the reactive surfactant; the multifunctional monomer; and optionally, the chain transfer agent, the initiator, or both.
18. The ink composition of claim 17 , wherein the ink composition is an aqueous inkjet ink composition.
19. An ink composition comprising water; resin particles; a colorant; and optionally, a wax, wherein the resin particles comprise a polymerization product of reactants comprising a dioxane/dioxalane monomer and an additional monomer, wherein the dioxane/dioxalane monomer is an ester of (meth)acrylic acid with an alcohol comprising a dioxane moiety, an ester of (meth)acrylic acid with an alcohol comprising a dioxalane moiety, or both, wherein the ink composition exhibits a gloss differential of less than about 5 units; a wet rub resistance of at least about 10 as measured using an about 4.5 ng drop of the ink composition; or both.
20. An ink composition comprising water; resin particles; a colorant; and optionally, a wax, wherein the resin particles comprise a polymerization product of reactants comprising a dioxane/dioxalane monomer and an additional monomer, wherein the dioxane/dioxalane monomer is an ester of (meth)acrylic acid with an alcohol comprising a dioxane moiety, an ester of (meth)acrylic acid with an alcohol comprising a dioxalane moiety, or both, wherein the reactants further comprise styrene, an alkyl (meth)acrylate, an acidic monomer, and a reactive surfactant, wherein one of these is the additional monomer.