Resin composition, insulating resin film and use thereof

A resin composition, comprising the following components in parts by mass:

• 50-90 parts of a hydrogenated hydrocarbon resin and 10-50 parts of a benzocyclobutene resin;
• the benzocyclobutene resin comprises at least one structural unit A and at least one structural unit B;
• the structural unit A has a structure as shown in formula I:
• R1 is vinylidene and/or ethylidene, wherein the structural unit A of the benzocyclobutene resin has a molar percentage of more than or equal to 5-80%;
• the structural unit B has a structure as shown in formula II:
• R2 is vinyl, ethyl and/or phenyl, wherein the structural unit B of the benzocyclobutene resin has a molar percentage of 15-85%,
• wherein the benzocyclobutene resin further comprises structural unit C, and the structural unit C has a structure as shown in formula IIIA and/or a structure as shown in formula IIIB:
• wherein the structural unit C of the benzocyclobutene resin has a molar percentage of 8-48%;
• wherein the hydrogenated hydrocarbon resin comprises any one or a combination of at least two of a hydrogenated styrene-butadiene copolymer, a maleic anhydride grafted hydrogenated styrene-butadiene copolymer, and hydrogenated polybutadiene, and
• wherein the hydrogenated hydrocarbon resin has a number average molecular mass of 20000-120000.