Tokuyama Patente

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Provided is a photochromic composition containing: a first photochromic compound represented by formula (1); and a second photochromic compound. The second photochromic compound includes at least one selected from the group consisting of: second A photochromic compounds that are represented by formula (1) and that have structures different from that of the first photochromic compound; second B photochromic compounds represented by formula (2); and second C photochromic compounds represented by formula (3). Also provided are a curable composition, an optical article, a lens, and eyeglasses, which all contain the photochromic composition.

The present invention provides a surface-treated aluminum nitride powder which is surface-treated with a silane compound having a polymerizable unsaturated bond, and when the aluminum nitride powder is filled into an epoxy resin to form a resin composition, low viscosity and a high level of filling can be achieved, the resin composition has a long pot life, and the surface-treated aluminum nitride powder is capable of maintaining high adhesion to the resin in a cured body. The surface-treated aluminum nitride powder of the present invention is an aluminum nitride powder having a silane compound having a polymerizable unsaturated bond in a molecule present on a particle surface, in which a carbon content per 1 m² of a surface of the aluminum nitride powder is 0.4 × 10^-3 g/m² or more and 1.6 × 10^-3 g/m² or less, and an unsaturated bond content per 1 g of carbon present on the surface of the aluminum nitride powder, calculated from an iodine amount determined by Wijs method, is 2.5 × 10²¹ pieces/g or more and 5.5 × 10²¹ pieces/g or less.

Provided is a method for producing a quaternary ammonium compound aqueous solution, said method being characterized in that: the quaternary ammonium compound aqueous solution contains not more than 1,000 ppm of organic impurities that have a molecular weight of not less than 1,000 g/mole; and a raw quaternary ammonium compound aqueous solution that contains specific quaternary ammonium ions and that contains metal impurities is brought into contact with a cation exchange resin which has a crosslinking degree of not less than 6 and counter ions of which are non-metal ions.

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Provided is a semiconductor processing solution containing the following (A) to (E): (A) a quaternary ammonium ion represented by formula (1); (B) a halide ion; (C) a hydroxide ion; (D) an oxidizer; and (E) water. (In the formula, R<1>, R<2>, R<3>, and R<4> are each independently a C1-16 alkyl group, provided that the number of carbon atoms in at least one alkyl group among R<1>, R<2>, R<3>, and R<4> is 2-16.)

Provided is a photoresist developing solution comprising (A), (B), (C), and (D). (A) is a quaternary ammonium ion represented by formula (1), (B) is a halide ion, (C) is a hydroxide ion, and (D) is water. (In the formula, R1, R}2, R3, and R4 are each independently a C1-16 alkyl group; at least one of R¹, R2, R3, and R4 is a C2-16 alkyl group; and not all of R¹, R2, R3, and R4 are the same alkyl group.)

An alkaline aqueous solution for a semiconductor, said solution comprising (A)-(D). (A) A quaternary ammonium ion represented by formula (1), (B) a halide ion, (C) a hydroxide ion, and (D) water (in the formula, R<1>, R<2>, R<3>, and R<4> are each independently an alkyl group having 1-16 carbon atoms. However, the number of carbon atoms of one or more alkyl groups among R<1>, R<2>, R<3> and R<4> is 2-16.)

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Provided are: a first adhesive composition containing a urethane prepolymer having an isocyanate group at a terminal, a blocked isocyanate having an isocyanate group protected by a blocking agent, and an organic solvent; and a second adhesive composition containing a water-dispersible urethane resin, a blocked isocyanate having an isocyanate group protected by a blocking agent, and water. Also provided are a laminate, an optical article, a lens, and eyeglasses that include a coating film of the first or second adhesive composition, and a method for producing a laminate.

Provided is an aqueous alkali solution containing (A) through (E). (A) is a quaternary ammonium ion represented by formula (1), (B) is a halide ion, (C) is a hydroxide ion, (D) is water, and (E) is a corrosion inhibitor. (In the formula, R¹, R², R³, and R⁴ are each independently a C1-16 alkyl group, and at least one of R¹, R², R³ and R⁴ is a C2-16 alkyl group.)

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The purpose of the present disclosure is to provide: a photochromic compound that is superior in terms of the temperature dependence and the color fading rate; a naphthol derivative that could be an intermediate for the photochromic compound; and a curable composition, an optical article, a lens, and eyeglasses each including the photochromic compound. An embodiment of the present invention provides a photochromic compound having a skeleton represented by formula (1). In formula (1), M is C, Si, or Ge. Ring A is a substituted or unsubstituted aromatic ring, a substituted or unsubstituted aromatic heterocyclic ring, or a substituted or unsubstituted condensed polycyclic ring in which an aromatic ring or an aromatic heterocyclic ring is fused on the substituted or unsubstituted aromatic ring or the substituted or unsubstituted aromatic heterocyclic ring. Z1 is a group represented by formula (1a) or a group represented by formula (1b).

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An object of an aspect of the present invention is to provide a fluorescent particle having superior dispersibility. A fluorescent particle (100) in accordance with an aspect of the present invention, includes a core particle (10A) charged with a first charge that is a positive charge or a negative charge, and further includes on the core particle: at least one polymer layer (12) that contains a polymer and is charged with a second charge that is a positive charge or a negative charge; and at least one fluorescent layer (11A, 11B) that contains fluorescent metal nanoclusters (13) and is charged with a third charge having a sign opposite to that of the second charge.

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The purpose of the present disclosure is to provide: a photochromic compound having excellent temperature dependency and an excellent color fading rate; a phenol derivative that can be an intermediate for the photochromic compound; and a curable composition, an optical article, a lens, and an eyeglass, each containing the photochromic compound. An embodiment of the present invention provides a photochromic compound having a backbone represented by formula (1). In formula (1), M represents C, Si, or Ge. Ring A is a substituted or unsubstituted aromatic ring, a substituted or unsubstituted aromatic heterocyclic ring, or a substituted or unsubstituted condensed polycyclic ring obtained through fusing, to either of said rings, an aromatic ring or an aromatic heterocyclic ring. Z1 represents a group represented by formula (1a) or a group represented by formula (1b).

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