Sand compositions containing a binder composition and a curing agent, in which the binder composition comprises (a) a binder comprising an acid-curable resin and (b) from 0.5 to 63.0 % by weight, based on the binder composition, of at least one curing accelerator selected from compounds represented by formula (1):
wherein X₁, X₂ each represent a hydrogen atom, a methyl group or an ethyl group;
exhibit an increased curing rate to provide a casting mold having an increased initial strength.
含粘结剂组合物和固化剂的砂组合物,其中粘结剂组合物包括 (a) 由酸性固化
树脂组成的粘结剂和 (b) 至少一种选自式 (1) 所示化合物的固化
促进剂,以粘结剂组合物为基准,重量百分比为 0.5 至 63.0%:
其中 X₁、X₂ 各自代表氢原子、甲基或乙基;
显示出更高的固化速率,以提供具有更高的初始强度的铸模。