Abstract: Provided are a compound which is excellent in solubility in a solvent and easily provides a film exhibiting high mobility without complicated processes, an organic semiconductor material using the same, and an organic semiconductor ink which enables easy fabrication of an organic transistor composed of a practical configuration. The problems are solved by a method of producing a dinaphthothiophene derivative, the method including the following steps (I) and (II): (I) a first step of subjecting a naphthol derivative represented by General Formula (A) and a naphthalene thiol derivative represented by General Formula (B) to dehydration condensation in the presence of acid to produce a sulfide derivative represented by General formula (C); and (II) a second step of performing dehydrogenation reaction of the sulfide derivative (C) in the presence of a transition metal salt or a transition metal complex to produce a dinaphthothiophene derivative (D).

Abstract: Provided are a compound which is excellent in solubility in a solvent and easily provides a film exhibiting high mobility without complicated processes, an organic semiconductor material using the same, and an organic semiconductor ink which enables easy fabrication of an organic transistor composed of a practical configuration. The problems are solved by a method of producing a dinaphthothiophene derivative, the method including the following steps (I) and (II): (I) a first step of subjecting a naphthol derivative represented by General Formula (A) and a naphthalene thiol derivative represented by General Formula (B) to dehydration condensation in the presence of acid to produce a sulfide derivative represented by General formula (C); and (II) a second step of performing dehydrogenation reaction of the sulfide derivative (C) in the presence of a transition metal salt or a transition metal complex to produce a dinaphthothiophene derivative (D).

Abstract: The present invention provides an insulating material which has a high curing rate as well as solvent resistance suitable for a printing method while having a high degree of breakdown strength as well as a low leak current density in order to improve the performance of an organic field effect transistor, and also provides an insulating film having the insulating material and a transistor. A resin composition for insulating materials contains a vinyl polymer, and the vinyl polymer has an acid value of 20 mgKOH/g or less, a (meth)acryloyl group equivalent of 220 to 1600 g/eq, and phenyl groups and (meth)acryloyl groups.

Abstract: Provided is a inorganic fine particle dispersant comprising, as an essential component, a compound resin (A) in which a polysiloxane segment (a1) having a structural unit represented by general formula (1) and/or general formula (2) and a silanol group and/or a hydrolyzable silyl group is bonded to a vinyl-based polymer segment (a2) through a bond represented by general formula (3). An inorganic fine particle dispersion liquid that contains the inorganic fine particle dispersant and inorganic fine particles, an inorganic fine particle dispersion containing the inorganic fine particle dispersion liquid, a paint, and a cured product are also provided.

Abstract: Provided is a inorganic fine particle dispersant comprising, as an essential component, a compound resin (A) in which a polysiloxane segment (a1) having a structural unit represented by general formula (1) and/or general formula (2) and a silanol group and/or a hydrolyzable silyl group is bonded to a vinyl-based polymer segment (a2) through a bond represented by general formula (3). An inorganic fine particle dispersion liquid that contains the inorganic fine particle dispersant and inorganic fine particles, an inorganic fine particle dispersion containing the inorganic fine particle dispersion liquid, a paint, and a cured product are also provided.

Abstract: Provided is a inorganic fine particle dispersant comprising, as an essential component, a compound resin (A) in which a polysiloxane segment (a1) having a structural unit represented by general formula (1) and/or general formula (2) and a silanol group and/or a hydrolyzable silyl group is bonded to a vinyl-based polymer segment (a2) through a bond represented by general formula (3). An inorganic fine particle dispersion liquid that contains the inorganic fine particle dispersant and inorganic fine particles, an inorganic fine particle dispersion containing the inorganic fine particle dispersion liquid, a paint, and a cured product are also provided.