Abstract: A fiber-reinforced molding material includes: as essential raw materials, a vinyl ester (A) which is a reaction product of an epoxy resin (a1) having an epoxy equivalent in the range of 180 to 500 and a (meth)acrylic acid (a2); an unsaturated monomer (B) having a flash point of 100° C. or higher; a thermoplastic resin (C); a polyisocyanate (D); a polymerization initiator (E); and carbon fibers (F) having a fiber length of 2.5 to 50 mm. The mass ratio ((A)/(B)) of the vinyl ester (A) to the unsaturated monomer (B) is in the range of 40/60 to 85/15. The molar ratio (NCO/OH) of the isocyanate group (NCO) of the polyisocyanate (D) to the hydroxy group (OH) of the vinyl ester (A) is in the range of 0.25 to 0.85.

Abstract: A fiber-reinforced molding material includes: as essential raw materials, a vinyl ester (A) which is a reaction product of an epoxy resin (a1) having an epoxy equivalent in the range of 180 to 500 and a (meth)acrylic acid (a2); an unsaturated monomer (B) having a flash point of 100° C. or higher; a thermoplastic resin (C); a polyisocyanate (D); a polymerization initiator (E); and carbon fibers (F) having a fiber length of 2.5 to 50 mm. The mass ratio ((A)/(B)) of the vinyl ester (A) to the unsaturated monomer (B) is in the range of 40/60 to 85/15. The molar ratio (NCO/OH) of the isocyanate group (NCO) of the polyisocyanate (D) to the hydroxy group (OH) of the vinyl ester (A) is in the range of 0.25 to 0.85.

Abstract: Provided is a fiber-reinforced molding material including as essential materials: a vinyl ester (A) that is a reaction product of an epoxy resin (a1) having an epoxy equivalent in the range of 180 to 500 and (meth)acrylic acid (a2); an unsaturated monomer (B) having a flash point of 100° C. or higher; a polyisocyanate (C); a polymerization initiator (D); and carbon fibers (E) having a fiber length of 2.5 to 50 mm, in which the mass ratio ((A)/(B)) of the vinyl ester (A) to the unsaturated monomer (B) is in the range of 40/60 to 85/15, and the molar ratio (NCO/OH) of isocyanate groups (NCO) in the polyisocyanate (C) to hydroxy groups (OH) in the vinyl ester (A) is in the range of 0.25 to 0.85.

Abstract: Provided is a fiber-reinforced molding material including as essential materials: a vinyl ester (A) that is a reaction product of an epoxy resin (a1) having an epoxy equivalent in the range of 180 to 500 and (meth)acrylic acid (a2); an unsaturated monomer (B) having a flash point of 100° C. or higher; a polyisocyanate (C); a polymerization initiator (D); and carbon fibers (E) having a fiber length of 2.5 to 50 mm, in which the mass ratio ((A)/(B)) of the vinyl ester (A) to the unsaturated monomer (B) is in the range of 40/60 to 85/15, and the molar ratio (NCO/OH) of isocyanate groups (NCO) in the polyisocyanate (C) to hydroxy groups (OH) in the vinyl ester (A) is in the range of 0.25 to 0.85.

Abstract: Disclosed is an unsaturated polyester resin composition comprising an unsaturated polyester (A) and a polymerizable unsaturated monomer (B), wherein the “shrinkage stress upon cooling” of a cured article thereof is 17 MPa or less and the ratio of the “shrinkage stress upon cooling/elastic limit” is 1 or less. The cured article has excellent gloss retention and yellowing resistance.

Abstract: Disclosed is an unsaturated polyester resin composition comprising an unsaturated polyester (A) and a polymerizable unsaturated monomer (B), wherein the “shrinkage stress upon cooling” of a cured article thereof is 17 MPa or less and the ratio of the “shrinkage stress upon cooling/elastic limit” is 1 or less. The cured article has excellent gloss retention and yellowing resistance.

Abstract: The present invention provides a curable resin composition comprising: a polymer (A) containing a polymerizable unsaturated bonding group; and a polymerizable unsaturated monomer (B). Polymerizable unsaturated monomer (B) comprises as an essential component an oligoalkyl(C.sub.2 -C.sub.4)ether(n=2-15)-monoalkoxy(C.sub.1 -C.sub.18)-(meth)acrylate. This curable resin composition according to the present invention displays superior adherence, air-drying, water resistance, and storage stability properties in addition to a reduced odor.