abstract |
The present invention relates to a kind of compositions of thermosetting resin.Said composition comprises 20 ~ 70wt% thermosetting resin, 1 ~ 30wt% solidifying agent, 0 ~ 10wt% promotor, tungsten compound and mineral filler, makes prepreg or is made by coating method paint thing by impregnation mode.Said composition can the thermal expansivity of obvious lower layer pressing plate, and effectively can stop UV light and reduce optical transmittance. |