Patent ID: 8198347

Claim:
A high thermal-conductive, halogen-free and flame-retardant resin composition, based on total weight of the resin composition, comprising: (1) 5% to 70% of phosphorus-containing epoxy resin; (2) at most 50% of multifunctional or bifunctional epoxy resin, (3) 1% to 20% of curing agent; (4) 0.01% to 10% of accelerant; (5) at most 20% of inorganic powder for enhancing rigidity if the resin composition is cured, wherein the inorganic powder having an average diameter of 0.01-20 micron(s) is at least one selected from the group consisting of SiO 2 , TiO 2 , Al(OH) 3 , Mg(OH) 3 and CaCO 3 in form of beads or irregular particles; (6) 5% to 85% of high thermal conductivity powder(s) having an average diameter of 0.1-10 micron(s) in form of dust, beads, fibers, chips or pieces, and having closest packed in highest density model by Horsfield packing model, wherein the high thermal conductivity powder is at least one selected from the group consisting of metal nitrides, metal oxides, carbides, corundum and aluminum powder; and (7) 0.01% to 10% of processing agents; wherein the phosphorus-containing epoxy resin is formed through an addition reaction whereby reactive hydrogen atoms of a phosphorus-containing compound are directly bonded to epoxy groups of the multifunctional or bifunctional epoxy resin and at least comprises a chemical structure selected from the group consisting of formulas (a) through (d) below: where 0<m<12, m is an integer; R 1 =H or C 1 -C 4 alkyl; and R 4 and R 5 are independently hydrogen, methyl, or where R 1 is as defined above; and X=A or B, and at least one X is B, wherein wherein E is where X is as defined above; and Q is where X and Q are as defined above; and where X is as defined above; and Y is —(CH 2 ) n - or phenylene, where 0<n<6 and n is an integer.