Patent ID: 6124420
Filing Date: 2000-09-26
Classification: C08G,C08L

Abstract:
An epoxy resin obtained by using a cresol novolak resin of which the total content of 3 to 6 nucleus bodies is 67 to 90% by weight, said epoxy resin being represented by the following formula (I): ##STR3## (in the formula (I), each P represents a methyl group, R represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and n is a positive number of 0.1 to 20 on average), wherein the plot of melt viscosity of said epoxy resin measured at 150.degree. C. by a cone plate method (variable, y: unit, poise) vs. the ratio of the total weight of 3 to 6 nucleus bodies in said epoxy resin (variable, x: unit, % by weight) satisfies the following conditions:said plot is present within the area surrounded by the lines of:1) y=500e.sup.-0.120x, 2) y=1000e.sup.-0.120x, 3) y=400 and 4) y=0.1, and the ratio of c/d is 1.8 or less, c (% by weight) being the amount of an epoxy resin component contained in a fraction which constitutes the highest peak obtained by gel permeation chromatography (GPC) to the total epoxy resin and d being the amount of an epoxy resin component contained in a fraction which constitutes the second highest peak to the total epoxy resin.