| 摘要 |
<p>PURPOSE:To contrive to improve the heat resistance and plating property of a laminated sheet by a method wherein a prepreg is made by impregnating paper base material with varnish treated by organic solvent containing epoxy resin with epoxy equivalent of 500-1,500, specified amine compound and Lewis acid complex and, after that, drying the resultant base material. CONSTITUTION:Firstly, a paper base material is impregnated with varnish treated by organic solvent containing epoxy resin with epoxy equivalent of 500-1,500, amine compound represented by the formula (1) and Lewis acid complex and, after that, dried in order to make a prepreg. Secondly, a necessary number of the prepregs are heated under pressure in order to obtain the titled laminated sheet. The compound represented by the general formula (1) is employed as the amine compound, which acts as curing agent. Further, boron trifluoride complex is exampled the Lewis acid complex, which acts as curing promotor. Bisphenol A type epoxy resin, brominated bisphenol A type epoxy resin, phthalic acid type epoxy resin, polypropylene type epoxy resin or the like is employed as the epoxy resin. Common organic solvent such as methyl ethyl ketone, acetone, alcohol or the like is used as the organic solvent.</p> |
