| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a nonhalogen flame retardant, especially inorganic filler-based flame retardant reduces processability for mechanical processing such as stamping and drilling, required when processing the laminate for electric insulation to provide a printed circuit board, and causes cracks at the processing, whitening caused by delamination, break of a drill, etc. SOLUTION: This prepreg comprises (a) a thermosetting resin and (b) a polymer having a cross-linked structure and a particle shape having <=2μm average particle diameter, and containing at least one kind selected from acrylonitrile, acrylic acid, ethyl acrylate, butyl acrylate, glycidyl acrylate and butadiene as a comonomer, as indispensable components, and is characterized in that the amount of the component (b) is 1-10 pts.wt. based on 100 pts.wt. component (a). |
