Patent ID: 8124674

Claim:
A halogen-free resin composition with high frequency dielectric property, calculating according to the parts by weight of organic solids, the total parts by weight of the organic solids being 100, comprising: (A) 10-50 parts by weight of copolymer of styrene-maleic anhydride; (B) 10-50 parts by weight of at least one compound having dihydro benzoxazine ring; (C) 10-24 parts by weight of at least one polyepoxide; and (D) 5-30 parts by weight of at least one phosphorus-containing flame retardant; wherein the molecular structural formula of the copolymer of styrene-maleic anhydride is: wherein, m:n=1:1, 2:1, 3:1, 4:1, 6:1, or 8:1, and the weight average molecular weight is 1300-50000; wherein the compound having dihydrobenzoxazine ring is at least one compound of Bisphenol-A benzoxazine resin, Bisphenol-F benzoxazine resin, allyl Bisphenol-A benzoxazine, and MDA (4,4′-Methylenedianiline) benzoxazine resin; wherein the polyepoxide comprises at least one of the following compounds: (1) bifunctional epoxy resin, selected from the group consisting of Bisphenol-A epoxy resin and Bisphenol-F epoxy resin; (2) phenolic aldehyde epoxy resin, selected from the group consisting of Phenolic novolac epoxy resin, Bisphenol-A novolac epoxy resin, orthocresol novolac epoxy resin, and Dicyclopentadiene novolac epoxy resin; (3) phosphorus-containing epoxy resin, selected from the group consisting of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) modified epoxy resin, 10-(2,5-dihydroxyphenyl)-10-H-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO-NQ) modified epoxy resin, and 10-(2,9-dihydroxynaphthyl)-10-H-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO-NQ) modified epoxy resin; wherein the phosphorus-containing flame retardant is at least one of phosphate compounds, and benzoxyphosphazene compounds.