POLYCARBOXYLIC ACID RESIN AND POLYCARBOXYLIC ACID RESIN COMPOSITION COMPRISING THE SAME, EPOXY RESIN COMPOSITION, THERMOSETTING RESIN COMPOSITION, CURED PRODUCT OF THE SAME, AND SEMICONDUCTOR DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a polycarboxylic acid resin that has a low refractive index and high sulfur resistance, from which a cured product of high transparency can be obtained.SOLUTION: The present invention provides a polycarboxylic acid resin represented by formula (1) (Xis a C1-20 divalent or trivalent organic group or a bond between T and O; if Xis the divalent organic group or the bond between T and O, m is 1, and if Xis the trivalent organic group, m is 2; Xis a C1-20 divalent organic group; T is a Si2-10 chain, branched, or cyclic siloxane skeleton which may have C, H, or N; n is an integer of 2-4).SELECTED DRAWING: Figure 1