Transparent desiccant for organic el, and method for using same

Abstract

A transparent desiccant for organic EL and methods for using the transparent desiccant are described, which is a cured product of an organopolysiloxane composition that contains (A) an alkenyl-group-containing organopolysiloxane including a linear organopolysiloxane having at least two alkenyl groups per molecule, (B) chemical formula (I):HRSiO  (I)(where R is a C1-10 monovalent hydrocarbon group, a is 0.001-1.0, and b is 0.7-2.1), and (C) a hydrosilylation catalyst. The number of mol Y of silicon-atom-bonded hydrogen atoms (mol) in component (B) satisfies the formula 0.002 (mol)≤(Y-X)≤0.8 (mol) relative to the number of mol X of silicon-atom-bonded alkenyl groups (mol) in component (A). The transparent desiccant for an organic EL is highly transparent, capable of top emission, has low shrinkage growth, suppresses loss of an element light-emitting portion, suppresses the short-circuit phenomenon, and has exceptional defoaming properties in the material curing process.