Abstract: A compound obtained through Michael addition reaction of an ?-aminoacetophenone skeleton-containing compound (I) represented by the following general formula (1) and a reactive compound (II) having a function as a Michael acceptor is used as a photopolymerization initiator. In the general formula (1), R1 represents an aliphatic group, R2 to R3 each independently represent an aliphatic group, etc., R4 to R7 each independently represent a hydrogen atom, X1 represents a single bond or a C1-6 alkylene group, X2 represents a carbonyl group, Y1 and Y2 represent a group represented by the following general formula (2). However, when Y1 and Y2 both have a structure represented by the general formula (2), X5 in at least one of them is —NH—. In the general formula (2), X3 and X4 each independently represent a linear or branched alkylene group having 2 to 6 carbon atoms, X5 represents a single bond, —O— or —NH—.

Abstract: A compound obtained through Michael addition reaction of an ?-aminoacetophenone skeleton-containing compound (I) represented by the following general formula (1) and a reactive compound (II) having a function as a Michael acceptor is used as a photopolymerization initiator. In the general formula (1), R1 represents an aliphatic group, R2 to R3 each independently represent an aliphatic group, etc., R4 to R7 each independently represent a hydrogen atom, X1 represents a single bond or a C1-6 alkylene group, X2 represents a carbonyl group, Y1 and Y2 represent a group represented by the following general formula (2). However, when Y1 and Y2 both have a structure represented by the general formula (2), X5 in at least one of them is —NH—. In the general formula (2), X3 and X4 each independently represent a linear or branched alkylene group having 2 to 6 carbon atoms, X5 represents a single bond, —O— or —NH—.

Abstract: Provided is an active-energy-ray-curable resin composition for forming a hard coating layer that protects the surface of a touch panel or the like and makes fingerprints less noticeable. The active-energy-ray-curable resin composition includes a urethane (meth)acrylate (A) prepared through a reaction in which a polyalkylene glycol (C) having a weight-average molecular weight Mw in a range of 5,000 to 30,000, a polyisocyanate (D), and a (meth)acrylate (E) intramolecularly including a hydroxyl group serve as essential raw-material components; and a polyfunctional (meth)acrylate (B), with a mass ratio [(A)/(B)] of (A) to (B) being in a range of [0.1/99.9] to [15/85].

Abstract: Provided are a method for producing a dispersion in which pulverization and dispersion of inorganic fine particles can be stably performed with high productivity while thickening and gelation are suppressed; a dispersion that provides a cured coating film having high hardness and high transparency; a coating material including the dispersion; a coating film; and a film provided by forming the coating film. By using a wet ball mill including a vessel (p) filled with a medium, a rotational shaft (q), a stirring impeller (r), a slurry supply port (s), a slurry discharge port (t), and a shaft seal device (u), inorganic fine particles (C) are pulverized and dispersed in a slurry containing as essential components an active-energy-ray-curable compound (A), an active-energy-ray-curable compound (B), and the inorganic fine particles (C).

Abstract: An object of the present invention is to provide a radiation-curable coating material which forms a cured coating film having high hardness and low curing shrinkage, a radiation-curable resin composition for obtaining the radiation-curable coating material, and a method for forming a protective layer using the radiation-curable coating material.

Abstract: Provided is an active-energy-ray-curable resin composition for forming a hard coating layer that protects the surface of a touch panel or the like and makes fingerprints less noticeable. The active-energy-ray-curable resin composition includes a urethane (meth)acrylate (A) prepared through a reaction in which a polyalkylene glycol (C) having a weight-average molecular weight Mw in a range of 5,000 to 30,000, a polyisocyanate (D), and a (meth)acrylate (E) intramolecularly including a hydroxyl group serve as essential raw-material components; and a polyfunctional (meth)acrylate (B), with a mass ratio [(A)/(B)] of (A) to (B) being in a range of [0.1/99.9] to [15/85].

Abstract: With branched epoxy(meth)acrylate which comprises a phenyl skeleton serving as a stiff molecular skeleton, and which comprises in the molecular skeleton a number of branched structures capable of forming a coating structure at a high crosslinking density after ultraviolet curing, it becomes possible to design the coating hardness to be high even if the content of an acryloyl group is designed to be low to effect less crosslinking reaction induced by ultraviolet curing, and it becomes possible to relax distortions inside a cured film due to cure shrinkage which occurs at the time of ultraviolet curing. As a result, there can be realized an ultraviolet-curable composition for an optical disk which has a high elastic modulus and is less tilted at the time of curing even if the coating hardness is designed to be high.

Abstract: An object of the present invention is to provide a radiation-curable coating material which forms a cured coating film having high hardness and low curing shrinkage, a radiation-curable resin composition for obtaining the radiation-curable coating material, and a method for forming a protective layer using the radiation-curable coating material.

Abstract: In order to provide an active energy-ray-curable water-based resin composition, which is excellent in storage stability before curing and able to form a cured coating film having an excellent appearance, wear resistance and water resistance, the present invention provides an active energy-ray-curable water-based resin composition comprising: an acrylic resin (A), and a compound (B), wherein the active energy-ray-curable water-based resin composition is obtained by dispersing the compound (B) having 8.6 to 10.5 mmol/g of a polymerizable unsaturated double bond in a resin solution prepared by dissolving or dispersing the acrylic resin (A) in water; the acrylic resin (A) is obtained by using 2 to 15 wt % of a polymerizable monomer represented by the general formula (1) and 55 to 70 wt % of methyl methacrylate; the acrylic resin (A) contains 1.3 to 2.7 mmol/g of a neutralized carboxyl group; and the ratio ((B)/(A)) of the content of the compound (B) to that of the acrylic resin (A) is 1.5 to 6 in terms of weight.