| abstract |
The present invention provides a kind of compositions of thermosetting resin, it includes phosphorous active esters, the compositions of thermosetting resin has many advantages, such as good thermal stability, humidity resistance, dielectric constant and dielectric loss angle tangent is low, water absorption rate is low and halogen-free flameproof effect, and has excellent technique processability；The present invention also provides application of the compositions of thermosetting resin in resin sheet, resin laminated metal foil, prepreg, laminate, metal-clad laminate and printed wiring board. |