PURPOSE: To provide a copper clad laminated plate having excellent electrical characteristics, chemical resistance, water resistance, and mechanical properties by lamination molding of copper foil with pre-preg consisting of glass cloth impregnated with polybutadiene-modified resol and dried.
CONSTITUTION: A phenolic compound is added to polybutadiene having at least 80% of 1, 4-structure and a number-average MW of 150W10,000 in the presence of acidic catalyst and reacted to form a composition consisting of adduct and phenols. This composition is reacted with formaldehyde to produce polybutadiene-modified resol. This resol is impregnated into glass cloth and dried to form pre-preg. A given number of the pre-pregs are layer with a copper foil, and both are laminated and molded. If polybutadiene used has a number-average MW less than 150, laminated plate has low resistance to chemicals and heat. If MW exceeds 10,000, impregnation into laminate substrate becomes poor and therefore is not preferable.
NOGUCHI MASANOBU
MATSUDA YOSHINOBU
YASUI MASAAKI
