Patent ID: 6432539
Filing Date: 2002-08-13
Classification: C08G,C08L,H01L,H05K,Y10T

Abstract:
An epoxy resin composition, which is comprised of:(A) an epoxy resin obtained by reacting the repeating unit of the following formula: (a) wherein R1 and R2 may be the same or different and independently represent H, a C1-20 alkyl group, a phenoxy group, a phenyl-C1-4 alkyl group or a phenyl-C1-4 alkyl group wherein a hydroxy group is substituted on the benzene ring, and Ra represents â€ƒor â€”C(R3)Hâ€”, wherein R3 represents H, a C1-4 alkyl group, CH2&boxH;CH, phenyl, furanyl, a C1-4 alkyl-phenyl group or a C1-4 alkyl-phenyl group wherein a hydroxy group is substituted on the benzene ring with an epihalohydrin; and (B) a hardener which is a phosphorus-containing polymer having the following repeating units: (a) wherein R1 and R2 may be the same or different and independently represent H, a C1-20 alkyl group, a phenoxy group, a phenyl-C1-4 alkyl group or a phenyl-C1-4 alkyl group wherein a hydroxy group is substituted on the benzene ring, and Ra represents â€ƒor â€”C(R3)Hâ€”, wherein R3 represents H, a C1-4 alkyl group, CH2&boxH;CH, phenyl, furanyl, a C1-4 alkyl phenyl group or C1-4 alkyl phenyl group wherein a hydroxy group is substituted on the benzene ring; (b) a phosphorus-containing repeating unit which is selected from the group consisting of (b1) wherein R1, R2, and R3 are defined as above, X represents an oxygen atom or an ion pair T represents an oxygen atom or a chemical linkage, and Râ€² and Râ€³ may be the same or different and independently represent a C1-18 alkyl group, phenyl and a phenyl-C1-6 alkyl group, or Râ€² and Râ€³ can be combined together, so that wherein Ri and Rj may be the same or different and independently represent a hydrogen atom or a C1-8 alkyl group; or wherein R1, R2, Râ€², and Ra are defined as above; and a unit of the following formula (c) which is an optional component: wherein Rb represents H, a C1-4 alkyl group, CH2&boxH;CH, phenyl, furanyl, a C1-4 alkyl-phenyl group or a C1-4 alkyl-phenyl group wherein a hydroxy group is substituted on the benzene ring, and wherein Y represents and wherein Rc represents NH2, OH, a C1-10 alkyl group, phenyl or benzoyl.