Substrate cycloolefin resin composition and obtained from the resin composition

Low dielectric constant, low dielectric loss tangent, provides a substrate obtained from a low water absorption, suitably used possible cyclic olefin resin composition as a material for a substrate having excellent heat resistance and the like and the resin composition. In particular, to provide a novel cyclic olefin resin composition which can be suitably used as a material of the substrate for the corresponding high-frequency circuit for transmission of high frequency signals. Cyclic olefin resin composition of the present invention, (A) cyclic olefin polymer 5 to 95 parts by weight of the glass transition temperature of 60 to 200 ° C., and (B) an olefinic compound, a diene compound, and aromatic vinyl be by polymerizing at least two or more kinds of monomers selected from the group consisting of hydrocarbon compounds, the soft copolymer 5-95 parts by weight glass transition temperature of 0 ℃ or less, relative to 100 parts by weight of the total of Te, comprising (D) a radical initiator 0.01 to 5 parts by weight, and (E) a polyfunctional compound 0-5 parts by weight having two or more in the molecule a radically polymerizable functional group.