Abstract: A thermosetting resin composition containing a maleimide compound (a) having at least one N-substituted maleimide group, and a compound (b) represented by the following general formula (1) exhibiting no reactivity with the maleimide group of the component (a) (Xb1 represents a single bond or a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 5 carbon atoms; Rb1 and Rb2 each independently represent a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 10 carbon atoms, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 18 ring carbon atoms, a substituted or unsubstituted heterocyclic aromatic hydrocarbon group having 5 to 20 ring atoms, an oxygen atom-containing group, or a group containing a combination of these groups; and m and n each independently represent an integer of 0 to 5).

Abstract: An organic material removing device includes: a container for storing a composite material containing an inorganic material and an organic material decomposable by a treatment liquid; a treatment tank including an accommodation portion for accommodating the container, a treatment liquid inflow portion for allowing the treatment liquid to flow in, and a treatment liquid outflow portion for allowing the treatment liquid to flow out; temperature control means for heating or cooling the treatment liquid; and a treatment liquid circulation means for allowing the treatment liquid to flow in from the treatment liquid inflow portion into the treatment tank and allowing the treatment liquid in the treatment tank to flow out from the treatment liquid outflow portion.

Abstract: A method of treating a thermosetting resin cured product, the method includes a treatment step of contacting an object to be treated, that contains a thermosetting resin cured product, with a treatment liquid containing an alkali metal hydroxide and an alcohol solvent, to decompose and dissolve the thermosetting resin cured product, in which moisture in the treatment liquid is removed during at least a part of a period of time from after preparation of the treatment liquid to completion of the treatment step.

Abstract: An organic material removing method includes a removing step of circulating a heated treatment liquid, in a unidirectional flow, to a plate-shaped composite material containing an inorganic material and an organic material decomposable by the treatment liquid, thereby contacting the heated treatment liquid, in a unidirectional flow, with the plate-shaped composite material to remove the organic material, wherein the composite material is arranged such that the treatment liquid comes into contact with at least a part of a plate surface of the composite material.

Abstract: An organic material removing device includes: a container for storing a composite material containing an inorganic material and an organic material decomposable by a treatment liquid; a treatment tank including an accommodation portion for accommodating the container, a treatment liquid inflow portion for allowing the treatment liquid to flow in, and a treatment liquid outflow portion for allowing the treatment liquid to flow out; temperature control means for heating or cooling the treatment liquid; and a treatment liquid circulation means for allowing the treatment liquid to flow in from the treatment liquid inflow portion into the treatment tank and allowing the treatment liquid in the treatment tank to flow out from the treatment liquid outflow portion.