基于磷酸盐的有机/无机复合型铸造粘结剂初探

Study on Phosphate-based Organic/inorganic Composite Foundry Binder System

通过无机磷酸铝溶液与有机聚乙烯醇溶液组成全新的粘结剂,探讨磷酸盐在固化剂的作用下发生缩聚反应的同时与聚乙烯醇之间发生脱水反应,从而在磷酸盐空间网络的部分节点上形成憎水点的可能性。试验结果表明,加入聚乙烯醇后,磷酸盐粘结剂的耐湿性得到了很大提高。

A new foundry binder system,which consists of inorganic aluminum phosphate and organic PVA,was developed in order to study the possibility of forming hydrophobic node on dehydrated phosphate network.The results show that the hygroscopic property of phosphate-PVA binder can be greatly increased.