| abstract |
The present invention relates to a phosphorus-containing epoxy composition comprising : (A) phosphorus-containing epoxy, (B) hardener, (C) one or more types of epoxy, and (D) inorganic filler; wherein on the basis of the total weight of components (A), (B) and (C), the hardener (B) comprises 15% to 30% by weight of benzo oxozine,and 2.5% to 9% by weight of phenylethlylene maleic anhydride. The phosphorus-containing epoxy composition comprising specific ratio of benzo oxozine and phenylethlylene maleic anhydride as hardener which provide flame retarding characteristic and heat-resistance, but also have the properties of high stability on dimension, low moisture absorption, and excellent electric characteristic. It is suitable for the manufacturing of pre-immersing materials, laminated materials, IC packaging materials, copper clad laminate, printed circuits, IC package substrates. |