CURING AGENT, CURABLE COMPOSITION, COMPOSITION FOR OPTICAL MATERIAL, OPTICAL MATERIAL, METHOD FOR PRODUCING THE OPTICAL MATERIAL AND LIQUID CRYSTAL DISPLAY AND LED MADE BY USING THE OPTICAL MATERIAL

摘要

PROBLEM TO BE SOLVED: To obtain a curing agent, a curable composition or a composition for an optical material, capable of giving a cured material having excellent heat resistance, optical transparency and light resistance, an optical material and to provide a method for producing the optical material, a liquid crystal display and an LED using the optical material.;SOLUTION: The curing agent contains at least two SiH groups prepared by hydrosilylating an aliphatic organic compound (α1) having at least two carbon-carbon double bonds each reactive with the SiH group, one to six vinyl group, a molecular weight of less than 900 and a viscosity of less than 1,000 poises with a linear and/or cyclic polyorganosiloxane (β1) having at least two SiH groups or by hydrosilylating an organic compound (α2) represented by formula (I) with a cyclic polyorganosiloxane (β2) having at least two SiH groups.;COPYRIGHT: (C)2002,JPO