METHOD FOR PRODUCING CARBOXYLIC ACID-MODIFIED TRIGLYCIDYL ISOCYANURATE, EPOXY RESIN COMPOSITION, AND CURED PRODUCT OF EPOXY RESIN

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a carboxylic acid-modified triglycidyl isocyanurate, and to provide an epoxy resin composition useful as a sealing material for LED (liquid crystal display) emitting short-wavelength light.

SOLUTION: There is provided the method for producing the carboxylic acid-modified triglycidyl isocyanurate having ≥80% light transmittance when the carboxylic acid-modified triglycidyl isocyanurate is dissolved in methyl ethyl ketone so that the concentration of the carboxylic acid-modified triglycidyl isocyanurate is 80 mass% and measurement is made with a spectrophotometer at 400 nm wavelength using a quartz cell having 1 cm optical path length. The method for producing the carboxylic acid-modified triglycidyl isocyanurate is characterized by reacting a monocarboxylic acid in an amount of 0.1-0.6 mol based on 1 mol of the triglycidyl isocyanurate in an organic solvent in the presence of a quaternary phosphonium salt. The epoxy resin composition comprises an epoxy resin component comprising >90 mass% of the carboxylic acid-modified triglycidyl isocyanurate and a curing agent.

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