| 摘要 |
PROBLEM TO BE SOLVED: To obtain a flame-retardant cyanic ester resin compsn. which, when cured alone, exhibits an improved resistance to soldering heat after moisture absorption by compounding a polyfunctional cyanic ester resin with a specified amt. of a specific epoxy resin. SOLUTION: This compsn. essentially comprises 20-60 pts.wt. polyfunctional cyanic ester resin having at least two OCN groups or its prepolymer (A), 5-50 pts.wt. novolak-type glycidyl ether represented by formula I (wherein Gly is a group represented by formula II; (n) is 0-10; (m) is 1-4; and R is H or a 1-4C alkyl) (B), and 10-40 pts.wt. glycidyl ether of tetrabromobisphenol A (C). An example of ingredient A is represented by formula III, and that of ingredient B, by formula IV. A prepreg is laminated to a copper foil by using the compsn. and thermoformed, thus giving a copper-clad laminate esp. useful for a printed circuit board. |
