JP2004090348A5 - - Google Patents

Claims (10)

On at least one surface of the base sheet, the ink-jet recording sheet provided with an ink receiving layer of at least one layer, the ink receiving layer, and an organic polyisocyanate, a high molecular weight hydrophilic polyol and / or polyamine, at least in the molecule 1 a polysiloxane compound having a number of active hydrogen-containing group is formed by using a composition comprising a hydrophilic polyurethane resin and the fine particles of alumina having a hydrophilic segment and a polysiloxane segment obtained by reaction An ink jet recording sheet.   The inkjet recording sheet according to claim 1, wherein the content of the particulate alumina is 5 to 95% by weight with respect to the hydrophilic polyurethane resin.   The fine particle alumina is obtained by using a mixture of high molecular weight hydrophilic polyol or polyamine and fine particle alumina as at least a part of the high molecular weight hydrophilic polyol or polyamine when synthesizing the hydrophilic polyurethane resin. The inkjet recording sheet according to claim 1, which is contained in a polyurethane resin.   The inkjet recording sheet according to claim 1, wherein the fine particle alumina has an average particle diameter of 1 to 300 nm.   2. The inkjet recording sheet according to claim 1, wherein the content of the hydrophilic segment and the polysiloxane segment in the hydrophilic polyurethane-based resin is 30 to 80 wt% and 0.1 to 10 wt%, respectively. On at least one surface of a substrate sheet, a method for producing an ink jet recording sheet provided with an ink receiving layer of at least one layer, the ink receiving layer, and an organic polyisocyanate, a high molecular weight hydrophilic polyol and / or polyamine, molecular in the synthesis of the polysiloxane compound and a hydrophilic polyurethane resin having a hydrophilic segment and a polysiloxane segment by reaction with at least one active hydrogen-containing group within the high molecular weight hydrophilic polyol or polyamine A method for producing an ink jet recording sheet, comprising forming an alumina-dispersed hydrophilic polyurethane-based resin composition using a mixture of a high-molecular-weight hydrophilic polyol or polyamine and fine-particle alumina as at least a part thereof.   The method for producing an ink jet recording sheet according to claim 6, wherein the mixture is obtained by removing a dispersion solvent of alumina sol from a mixture of high molecular weight hydrophilic polyol or polyamine and alumina sol.   The method for producing an ink jet recording sheet according to claim 6 or 7, wherein the content of alumina in the mixture is 5 to 95% by weight based on the hydrophilic polyurethane resin.   The method for producing an ink jet recording sheet according to claim 6, wherein the fine particle alumina has an average particle diameter of 1 to 300 nm.   The method for producing an ink jet recording sheet according to claim 6, wherein the content of the hydrophilic segment and the polysiloxane segment in the hydrophilic polyurethane-based resin is 30 to 80 wt% and 0.1 to 10 wt%, respectively. .