Patent ID: 11884815
Assignee: ARISAWA MFG. CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  H | IPC C

Claim 0:
1. A thermosetting resin composition, comprising:
a solid epoxy resin that is solid at 25° C.;
a non-solid epoxy resin that is non-solid at 25° C.;
particulate rubber dispersed in the non-solid epoxy resin;
a curing agent;
an inorganic filler; and
polycarbonate diol-derived polyurethane,
wherein
when a total part by mass of the solid epoxy resin and the non-solid epoxy resin is 100 parts by mass, a content of the solid epoxy resin that is solid at 25° C. is from 60 to 85 parts by mass,
when a total part by mass of the solid epoxy resin and the non-solid epoxy resin is 100 parts by mass, a content of the non-solid epoxy resin that is non-solid at 25° C. is from 15 to 40 parts by mass,
when a total part by mass of the solid epoxy resin and the non-solid epoxy resin is 100 parts by mass, a content of the particulate rubber is from 3 to 15 parts by mass,
an equivalent amount of a curing agent to one equivalent amount of an epoxy group of the solid epoxy resin and the non-solid epoxy resin is from 0.3 to 0.8 equivalents,
when a total part by mass of the solid epoxy resin and the non-solid epoxy resin is 100 parts by mass, a content of the inorganic filler is from 60 to 150 parts by mass,
when a total part by mass of the solid epoxy resin and the non-solid epoxy resin is 100 parts by mass, a content of the polycarbonate diol-derived polyurethane is from 50 to 100 parts by mass,
a NCO/OH ratio of the polycarbonate diol-derived polyurethane at a time of synthesis is from 0.85 to 0.99;
an acid value of the polycarbonate diol-derived polyurethane is from 10 to 30 mgKOH/g, and
a weight average molecular weight of the polycarbonate diol-derived polyurethane is from 15,000 to 50,000.