| 摘要 |
PROBLEM TO BE SOLVED: To obtain a hydrophilic polyurethane resin composition containing a large amount of uniformly dispersed particulate alumina to keep transparency and capable of forming a film exhibiting excellent adhesiveness to various substrates and having water-absorptivity, anticlouding property, transparency, flexibility, writability with water-based ink, water-resistance, blocking resistance and slipperiness, and provide a method for producing the composition. SOLUTION: The composition is composed of a hydrophilic polyurethane resin and the particulate alumina. The hydrophilic polyurethane resin is produced by reacting an organic polyisocyanate, a hydrophilic polyol and/or polyamine having a high molecular weight and a polysiloxane having at least one active hydrogen-containing group in the molecule. The particulate alumina is stably dispersed in a solution of the hydrophilic polyurethane resin. COPYRIGHT: (C)2005,JPO&NCIPI
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