Abstract: The present invention provides a curable resin composition for stereolithography, which contains a urethane resin (A) having a (meth)acryloyl group and a photopolymerization initiator. The content of (meth)acryloyl group in the urethane resin (A) is 0.8 mmol/g or more and 2.2 mmol/g or less. The curable resin composition for stereolithography has low viscosity and can form a cured product excellent elastic modulus and impact resistance because of high impact strength and little change with time.

Abstract: A curable resin composition that has low viscosity and forms a cured product having excellent mechanical physical properties, a cured product, and a three-dimensional object The curable resin composition contains a urethane resin (A) containing a (meth)acryloyl group, and a monofunctional (meth)acrylate compound (B1) and/or a bifunctional (meth)acrylate compound (B2), in which the urethane resin (A) is formed using, as essential reaction raw materials, a polyester polyol (a1), a polyisocyanate (a2), and a compound (a3) containing a hydroxyl group and a (meth)acryloyl group, and the polyester polyol (a1) is formed using, as essential reaction raw materials, a glycol (a1-1) containing a hydrocarbon group in a side chain, and a polycarboxylic acid (a1-2).

Abstract: The present invention provides a curable resin composition containing a polyester resin (A) having a (meth)acryloyl group and a monofunctional (meth)acrylate compound (B1) and/or a difunctional (meth)acrylate compound (B2). The average functional group number of (meth)acryloyl groups possessed by the polyester resin (A) is within a range of 1.5 or more and 3 or less, and the content of the polyester resin (A) in the curable resin composition is 50% by mass or more. The curable resin composition has low viscosity and produces a cured product having excellent mechanical properties, and thus can be preferably used as a resin composition for optical three-dimensional shaping.

Abstract: The present invention provides an active energy ray-curable composition exhibiting high curability and having excellent offset printability when used for a printing ink, an active energy ray-curable printing ink having both excellent curability and offset printability, and a printed matter using the same. An active energy ray-curable composition includes a urethane (meth)acrylate resin (A) and a polymerization initiator (B), wherein the urethane (meth)acrylate resin (A) is produced by using an aromatic polyisocyanate (a), a hydroxyl group-containing mono(meth)acrylate (b), and a polyol (c) as essential reaction raw materials so that the ratio [(b?)/(a?)] of the number of moles (b?) of hydroxyl groups contained in the hydroxyl group-containing mono(meth)acrylate (b) to the number of moles (a?) of isocyanate groups contained in the aromatic polyisocyanate (a) is within a range of 0.99 to 0.40, and the urethane (meth)acrylate resin (A) has a (meth)acryloyl group concentration within a range of 1.5 to 4.0 mmol/g.

Abstract: The present invention provides an active energy ray-curable composition exhibiting high curability and having excellent offset printability when used for a printing ink, an active energy ray-curable printing ink having both excellent curability and offset printability, and a printed matter using the same. An active energy ray-curable composition includes a urethane (meth)acrylate resin (A) and a polymerization initiator (B), wherein the urethane (meth)acrylate resin (A) is produced by using an aromatic polyisocyanate (a), a hydroxyl group-containing mono(meth)acrylate (b), and a polyol (c) as essential reaction raw materials so that the ratio [(b?)/(a?)] of the number of moles (b?) of hydroxyl groups contained in the hydroxyl group-containing mono(meth)acrylate (b) to the number of moles (a?) of isocyanate groups contained in the aromatic polyisocyanate (a) is within a range of 0.99 to 0.40, and the urethane (meth)acrylate resin (A) has a (meth)acryloyl group concentration within a range of 1.5 to 4.0 mmol/g.

Abstract: The present invention relates to a gelled fluoride resin fine particle dispersion for use as a coating, to a method of production thereof, and to a method using this gelled fluoride resin fine dispersion to protect an alkaline inorganic hardened body.The objective of the present invention is to provide an aqueous resin for use as a coating, this aqueous resin being able to form a high performance coating film that is superior in its ability to inhibit the leaching out of the alkaline substance from the alkaline inorganic hardened body, which has excellent weatherability, water resistance, alkaline resistance, and dirt picking resistance.The present invention accomplishes the stated objective through the utilization of gelled fine particles of a fluorine containing resin.The present invention may be used in the coating field.