O-Cresol → 2-(2-Ethoxyethoxy)ethyl acetate

Participants

Reaction Conditions

Reaction Steps

A reflux condenser, a thermometer, a bleed tube, and a stirrer were set to a four-necked flask. In order to prepare a reaction solution, 203 parts by mass of cresol novolac epoxy resin “YDCN-700-5” (available from NIPPON STEEL CHEMICAL CO., LTD., epoxy equivalent weight: 203), 103 parts by mass of diethylene glycol monoethyl ether acetate, 0.2 parts by mass of hydroquinone, 72.7 parts by mass of acrylic acid, and 0.6 parts by mass of dimethyl benzyl amine were added to the four-necked flask. The reaction solution was heated at 110° C. for 10 hours to cause the addition reaction. Subsequently, into thus-obtained solution in the four-necked flask, 60.8 parts by mass of tetrahydrophthalic acid anhydride and 78.9 parts by mass of diethylene glycol monoethyl ether acetate were added, and then thus-obtained solution was heated at 81° C. for 3 hours to react them. Consequently, a 65 mass % solution (carboxyl group containing resin solution C-3) of resin containing a carboxyl group was obtained.

Provenance & Evidence