Patent ID: 8362116
Filing Date: 2013-01-29
Classification: C08G,C09D

Abstract:
1. A low dielectric resin varnish composition for laminates, in which the resin composition includes one or more than one base resin and (D) flame retardant agent, curing agent, accelerator and solvent, wherein said basic resin comprising: 30 to 50% (based on the total resin weight) (C), dicyclopentadiene-dihydrobenzoxazine (DCPD-BX, Resin 2), and 1˜50% (based on the total resin weight) (A), dicyclopentadiene-phenolic resin (DCPD-PN); or 13˜60% (based on the total resin weight) (B), one or more of the epoxy resins, comprising dicyclopentadiene-phenol novolac epoxy (DCPD-PNE, Resin 1), wherein, component (A) dicyclopentadiene-phenolic resin (DCPD-PN) is prepared by reacting dicyclopentadiene with phenolic compounds having the structural formula as follows: Z: —CH n: 0.5˜1.5; component (B) one or more of the epoxy resin, DCPD-PNE, (Resin 1) is prepared by reacting DCPD-PN resin and epichlorohydrin, its structural formula is as follows: Z: —CH n: 0˜2; and component (C) dicyclopentadiene-dihydrobenzoxazine, (DCPD-BX, Resin 2) is prepared by mixing and stirring to react (1) dicyclopentadiene-phenolic resin, (2) primary amine compound with mixed mono-functional group and bi-functional group and (3) formaldehyde or paraformaldhyde compound, its structural formula is as follows: Z: —CH R: alkyl or aryl n: 0˜1.