Aqueous coating composition, coating method thereof, and ink-jet recording sheet
AssigneeKonica Corporation
InventorsYOICHI SAITO, MASARU TSUCHIYA, YOSHIHIRO MOCHIZUKI, KEIJI OHBAYASHI
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Abstract
An aqueous coating composition is disclosed. The composition comprises fine organic particles, polyvinyl alcohol, and boric acids or salts thereof and comprising substantially no gelatin, and the same having a viscosity of 10 to 100 cp at 40 ° C., and a viscosity at 15 ° C., which is at least 20 times as much as that at 40 ° C. A coating method of the composition and an ink-jet sheet prepared by employing the composition are also disclosed.
Claims10
An aqueous coating composition comprising fine organic particles, polyvinyl alcohol, and boric acids or salts thereof and comprising substantially no gelatin, and the same having a viscosity of 10 to 100 cp at 40° C., and a viscosity at 15° C., which is at least 20 times as much as that at 40° C.
An ink-jet recording sheet which is produced by coating, onto a support, a coating composition which is obtained by mixing a cationic polymer-containing solution, a fine inorganic particle dispersion, and an aqueous boric acid salt solution, followed by adding an aqueous low-polymerized polyvinyl alcohol solution, and an aqueous high-polymerized polyvinyl alcohol solution in the listed order into the resulting dispersion.
The ink-jet recording sheet which is produced by coating the coating composition onto the support;
- then chilling the coated layer temporarily to no more than 20° C., and thereafter, drying the chilled layer at a temperature of 20 to 70° C.
Dependencies are inferred from the claim text.