Terpolymer compositions for coating substrates used in computer printers
View Patent ↗Terpolymer compositions of vinyl caprolactam (VCL), dimethylaminopropyl methacrylamide (DMAPMA) and hydroxyethyl methacrylate (HEMA) are described to coat substrates for use in computer printers, and provide advantageous print quality thereon.
1. A formulation including a terpolymer composition consisting essentially of vinyl caprolactam (VCL), dimethylaminopropyl methacrylamide (DMAPMA) and hydroxyethyl methacrylate (HEMA), uncrosslinked or crosslinked, unquaternized or quaternized, which exhibits light stability to dyes found in ink-jet printers, as evidenced by a less than 25% color fading in the ASTM G-53-84 test.
2. A formulation according to claim 1 which includes another water soluble ingredient.
3. A formulation according to claim 2 wherein said ingredient is polyvinylalcohol (PVA), polyvinylpyrrolidone, acrylate, styrene-butadiene latex, gelatin, poly(2-ethyl-2-oxazoline), and/or a cellulosic polymer.
4. A formulation according to claim 2 wherein said ingredient is an inorganic pigment selected from a silicate, aluminate, zirconate, barium sulfate, calcium carbonate and clay.
5. A formulation according to claim 1 wherein the terpolymer is uncrosslinked.
6. A formulation according to claim 1 wherein the terpolymer is crosslinked.
7. A formulation according to claim 1 wherein the terpolymer is unquaternized.
8. A formulation according to claim 1 wherein the terpolymer is quaternized.
9. A formulation according to claim 1 wherein the terpolymer is crosslinked and quaternized.
10. A formulation according to claim 1 wherein the terpolymer composition comprises by wt., 60-90% VCL, 10-30% DMAPMA and 2-10% HEMA.
11. A formulation according to claim 10 wherein the terpolymer composition comprises by wt., 75-80% VCL, 13-16% DMAPMA and 4-6% HEMA.
12. A formulation according to claim 10 wherein the terpolymer composition includes up to about 0.8% of a crosslinking agent.
13. A formulation according to claim 10 wherein the terpolymer composition comprises up to 40% of a quaternizing agent.
14. A formulation according to claim 10 wherein the terpolymer composition comprises a crosslinking agent and the crosslinking agent is pentaerythriol triallyl ether (PETE).
15. A formulation according to claim 10 wherein the terpolymer composition comprises a crosslinking agent present in an amount of 0.5-0.7% by wt. of the terpolymer.