Coating compositions for forming inkjet-receptive coatings on a substrate
View Patent ↗Coating compositions for forming inkjet-receptive coatings on a substrate which are glossy, dry rapidly, provide good color density, exhibit low density loss, and are water-resistant, include (a) a crosslinkable cationic terpolymer, (b) an adhesion promoter, (c) a crosslinker, (d) a binder, and (e) water.
1. A coating composition for making inkjet-receptive coatings on a substrate, comprising
(a) a crosslinkable cationic terpolymer, wherein the terpolymer is a terpolymer of quaternized vinyl caprolactam (VCL), dimethylaminopropyl methacrylamide (DMAPMA) and hydroxyl ethyl methacrylate (HEMA),
(b) adhesion promoter,
(c) crosslinker,
(d) binder, and
(e) water,
wherein said binder comprises a quaternized poly(vinylpyrrolidone-co-dimethylaminoethyl methacrylate) copolymer.
2. A coating composition according to claim 1 wherein (a) is 25%; (b) is 15%; (c) is 8%; and (d) is 15%.
3. A coating composition according to claim 1 wherein, by weight, the terpolymer comprises 60-90% VCL, 10-30% DMAPMA, and 2-10% HEMA.
4. A coating composition according to claim 3 wherein, by weight, (a) is 10-50%; (b) is 5-50%; (c) is 1-12%; and (d) is 5-20%.
5. A coating composition according to claim 3 wherein, by weight, (a) is 10-50%; and (d) is 5-20%.
6. A coating composition according to claim 1 wherein (c) is a polyepoxy resin.
7. A coating composition according to claim 1 wherein (b) is a polyethyloxazoline.
8. A coating composition according to claim 1 wherein (d) further includes a binder selected from the group consisting of polyvinyl alcohol, gelatin, starch, latex and combinations thereof.
9. A coating composition according to claim 1 which also includes one or more of barium chloride, aluminum sulfate, aluminum chloride, barium sulfate, titanium dioxide and a surfactant.
10. A coating composition according to claim 1 having a pH of about 9.
11. A coating composition according to claim 1 having a viscosity of about 200-400 cps.
12. An inkjet-receptive coated substrate coated with the composition of claim 1 .
13. An inkjet-receptive coated substrate coated with the composition of claim 3 .
14. An inkjet-receptive coated substrate coated with the composition of claim 3 .
15. An inkjet-receptive coated substrate coated with the composition of claim 6 .
16. An inkjet-receptive coated substrate coated with the composition of claim 7 .
17. An inkjet-receptive coated substrate coated with the composition of claim 8 .
18. An inkjet-receptive coated substrate coated with the composition of claim 9 .