| abstract |
The present invention provides a kind of composition epoxy resin and contain its prepreg, metal-clad laminate and printed circuit board, the composition epoxy resin includes epoxy resin, curing agent and nano core shell rubber particle, 80% or more the sheath polymers of the nano core shell rubber particle are that stratum nucleare surface is grafted on chemical bond, and the sheath polymers are with a thickness of 30~80nm.The nano core shell rubber particle is applied in the composition epoxy resin, so that composition epoxy resin nano core shell rubber particle swelling ratio in high temperature cure process is small, do not occur to reunite again each other, curing system melt viscosity is low, it is good to reinforcing material wellability, process operability, processability are strong, and the prepreg thus prepared is apparently excellent, and the plate toughness of preparation, drill processability are excellent. |