Patent ID: 8663757
Filing Date: 2014-03-04
Classification: B41M

Abstract:
1. An inkjet recording medium comprising: a support; and an ink-receiving layer which is provided on the support and which contains an alumina pigment, an alkylsulfonic acid having the carbon number of 1 or more and 4 or less, a polymeric compound, a water-soluble zirconium compound, and a boric acid or a borate, wherein the ink-receiving layer contains 0.5 parts or more and 8 parts or less by mass of the polymeric compound, 0.15 parts or more and 3 parts or less by mass of the water-soluble zirconium compound, and 0.8 parts or more and 3 parts or less by mass of the boric acid or the borate per 100 parts by mass of the alumina pigment; the polymeric compound is one obtained by cationizing with acid at least one amino group of a product, the product being obtained by the reaction of at least three compounds, that is, (i) a sulfur-containing organic compound containing 2 or more active hydrogen atoms, (ii) a polyisocyanate compound containing 2 or more isocyanate groups, and (iii) an amine compound containing 2 or more active hydrogen atoms; and the proportion B/A is 0.02 or more and 6 or less, where A represents parts by mass of the polymeric compound per 100 parts by mass of the alumina pigment and B represents parts by mass of the water-soluble zirconium compound per 100 parts by mass of the alumina pigment.