Patent ID: 7235279
Filing Date: 2007-06-26
Classification: G21K

Abstract:
1. A process for producing a radiation image storage panel, comprising the steps of: i) preparing a coating composition comprising at least a bivalent europium activated alkaline earth metal halide phosphor, a polyurethane resin binder, and a mixed solvent, which comprises a low boiling temperature solvent having a viscosity of at most 0.6 mPa·s and a high boiling temperature solvent having a viscosity higher than 0.6 mPa·s, boiling temperatures of the low boiling temperature solvent and the high boiling temperature solvent being different by at least 10° C. from each other, wherein the high boiling temperature solvent is n-butyl acetate and the low boiling temperature solvent is methyl ethyl ketone, and wherein a proportion of the methyl ethyl ketone with respect to the total amount of the mixed solvent is within a range of 30% by weight to 70% by weight, ii) applying the coating composition onto a substrate, and iii) drying the coating composition, which has been applied onto the substrate, to remove the mixed solvent, a stimulable phosphor layer being thereby formed on the substrate.