| 摘要 |
PURPOSE:To obtain the titled laminated sheet having excellent flame-retardancy and punchability, etc., by adding and reacting a brominated epoxy resin as a flame-retardant to a phenolic resin before resol-forming reaction, impregnating or applying the obtained phenolic resin varnish to a substrate and hot forming the product. CONSTITUTION:A phenolic resin varnish (e.g. tung oil-modified resol phenolic resin) produced by the addition and reaction of a brominated epoxy resin as a flame retardant before the resol-forming reaction is impregnated or applied to a paper substrate at a specific rate and the obtained prepreg is hot formed to obtain a laminated sheet. The mold-releasability can be further improved by adding 0.5-2wt.% mold-release agent such as lauric acid, stearic acid salt, etc., to the varnish.
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