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. The fiber-reinforced molding material is excellent in working environment, handleability, and moldability in molding work, and provides a molded article excellent in appearance and various physical properties, such as bending strength, and can therefore be suitably used in automobile members and the like.
提供了一种纤维增强成型材料,其基本材料包括:
乙烯基酯 (A),它是环氧当量在 180 至 500 之间的环氧
树脂 (a1) 和(甲基)
丙烯酸 (a2) 的反应产物;不饱和单体 (B),其闪点为 100°C 或更高;多
异氰酸酯 (C);聚合
引发剂 (D);以及碳纤维 (E),其纤维长度为 2.其中
乙烯基酯(A)与不饱和单体(B)的质量比((A)/(B))在 40/60 至 85/15 之间,多
异氰酸酯(C)中的异
氰酸基(NCO)与
乙烯基酯(A)中的羟基(OH)的摩尔比(NCO/OH)在 0.25 至 0.85 之间。该纤维增强模塑材料在工作环境、可操作性和模塑工作中的成型性方面都非常出色,并能提供外观和各种物理性能(如弯曲强度)都非常出色的模塑制品,因此可适用于汽车构件等。