The curable composition, a mesogen-containing cured product and its manufacturing method

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PROBLEM TO BE SOLVED : To provide a curable composition which uses a resin having good solubility and dispersibility although having a mesogenic group and provides a relatively easily producible low-elasticity hardened product, a hardened product of the composition and a production method of the hardened product.SOLUTION : A curable composition comprises (A) a copolymer of formula (1) having a mesogenic group, (B) a silicon compound having two or more hydrogen-silicon bonds and (C) a hydrosilylation catalyst. In formula (1), Rto Rare 2-valent hydrocarbon groups with R≠R; B is -O-, -NH- or -S-; D and E are -O-, *-R-NH- or *-R-S- (* is the direction of bonding to a phenyl group); R is a single bond or a divalent hydrocarbon group; X and Y are a monovalent aliphatic hydrocarbon, a (meth)acrylic group, Cn, OCH, NO, F, Co, Br and/or I; p and q are 0-4; Z is a divalent group containing a silicon atom containing an unsaturated group.