Abstract: The present invention aims to provide a coating resin composition which can be formed into a coating film having an anti-fogging property and an anti-dirt property. A coating resin composition is used for forming a coating film and contains: a cyclic ether group-containing polymer (A) which is a polymer of a polymerizable monomer component (a) containing an ethylene-based unsaturated monomer (a11) having a cyclic ether group; and a component (B) consisting of at least one compound selected from a group consisting of a polycarboxylic acid (b1) and a polycarboxylic acid anhydride (b2). A cured product of the coating resin composition which is cured by being heated for 0.1 hour or more at a temperature higher than or equal to 100° C. and lower than or equal to a decomposition temperature of the coating resin composition has a water contact angle of 900 or less under a measurement specified by JIS R3257.

Abstract: The carboxyl-containing resin in accordance with the present invention has a structure resulting from addition of a carboxylic acid to at least one of epoxy groups of a biphenyl novolac epoxy resin. The carboxylic acid includes at least a polybasic acid.

Abstract: The present invention provides a resin composition for resist to be efficiently formed into a cured product with high properties of crack resistance, bulge resistance, protrusion resistance, and the like for filling a through-hole, a via hole, or the like with the cured product. The resin composition for masks in accordance with the present invention contains a first resin and a second resin. The first resin is prepared by an addition reaction of polybasic acid anhydride with an adduct of an ethylenically unsaturated compound having a carboxyl group and bifunctional epoxy resin. The second resin having; a group obtained by an addition reaction of an epoxy group with monocarboxylic acid; and a group obtained by addition reaction of an epoxy group with polybasic acid.

Abstract: The carboxyl-containing resin in accordance with the present invention has a structure resulting from addition of a carboxylic acid to at least one of epoxy groups of a biphenyl novolac epoxy resin. The carboxylic acid includes at least a polybasic acid.

Abstract: The present invention provides a resin composition for resist to be efficiently formed into a cured product with high properties of crack resistance, bulge resistance, protrusion resistance, and the like for filling a through-hole, a via hole, or the like with the cured product. The resin composition for masks in accordance with the present invention contains a first resin and a second resin. The first resin is prepared by an addition reaction of polybasic acid anhydride with an adduct of an ethylenically unsaturated compound having a carboxyl group and bifunctional epoxy resin. The second resin having; a group obtained by an addition reaction of an epoxy group with monocarboxylic acid; and a group obtained by addition reaction of an epoxy group with polybasic acid.