Patent ID: 11912870
Assignee: NIPPON SHEET GLASS COMPANY, LIMITED
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A cured product of a resin composition, the resin composition comprising a first silsesquioxane having a silicone chain and a plurality of oxetanyl group; a first alicyclic epoxide having a silicone chain and a plurality of first epoxy groups; and a polymerization initiator,
the cured product having an average thermal expansion coefficient α1 [K−1]in a temperature range of 30 to 200° C., the average thermal expansion coefficient al satisfying at least one of α1/α2≥10 and (α1−α2)2×108≥0.4, where a reference value α2 is 350×10−6 [K−1] or less,
the cured product having an absorbance spectrum measured by a Fourier transform infrared spectrometer, the absorbance spectrum including an absorbance Ia derived from a siloxane bond in which two silicon atoms are bonded to one oxygen atom, an absorbance Ib derived from a hydrocarbon group, and an absorbance Ic derived from a hydroxyl group, wherein requirements 0.09≤Ia/Ib≤3.0 and 0.04≤Ic/Ib≤1.0 are satisfied.