| 摘要 |
PURPOSE:To produce the titled resin having high trasparency without lowering electrical properties and plasticity, by mixing a reaction product of a phenolic compound and tung oil with a reaction product of methyl eleostearate and a phenolic compound at a specific ratio, and reacting the mixture with formaldehyde. CONSTITUTION:The reaction product (TP) prepared by the reaction of a phenolic compound with tung oil in the presence of p-toluene-sulfonic acid, triethanolamine, etc. is mixed with the reaction product (EP) prepared by the reacton of methyl eleostearate with a phenolic compound, at a weight ratio [EP/(TP+EP)] of 30-60. The mixture is made to react with formaldehyde in the presence of ammonia water, triethylamine, etc. to obtain the objective resin.
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