| 摘要 |
PURPOSE:To obtain a laminate outstanding in dielectric constant, heat resistance and electrical insulation, by using a resin composition prepared by blending a carboxyl group-terminated 1,4-polybutadiene, polymaleimide and phenolic antioxidant in an inert solvent. CONSTITUTION:First, a resin composition is prepared by blending, in an inert solvent, (A) a carboxyl group-terminated 1,4-polybutadiene with a number- average molecular weight <=10,000, (B) a polymaleimide of formula (R1 is a- valent 2C organic group; a is 2-10) (pref. N,N'-P,P'-diphenylmethane bismaleimide) and (C) 0.01-3wt.% (based on the total amount of the components A, B and C) of a phenolic antioxidant [pref., 2,2'-methylenebis(4-methyl-6-t- butylphenol)], preferably, by preliminary reaction between the components A and B followed by incorporation of the component C, thence, a substrate is impregnated with this resin composition to form a prepreg; specified number of sheets of which are laminated and, furthermore, if needed, a copper foil is laid thereon followed by pressing while heating to effect curing, thus obtaining the objective laminate. |
