| 摘要 |
PURPOSE:To obtain a laminate for printed circuits, excellent in high-frequency characteristics, by laminating nonwoven glass cloth bases impregnated with a varnish comprising a specified 1,2-polybutadiene resin and DAP resin. CONSTITUTION:Nonwoven glass cloth bases are impregnated with a thermoset ting resin varnish comprising a 1,2-polybutadiene resin having pendant vinyl groups and DAP resin. These nonwoven cloth bases are laminate-molded to obtain the purpose laminate. The DAP resin is prepared by using allyl alcohol which is its hydrolyzate as a principal material, has polymerizable double bonds in the molecule, and undergoes crosslinking with 1,2-polybutadiene to form a three-dimensional polymer. In this way, a laminate having a dielectric constant as high as that obtained when only the polybutadiene resin is used and improved heat resistance can be obtained.
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