Modified composition of binding agent for titanium alloy investment casting and application thereof

The invention discloses a modified composition of a binding agent for titanium alloy investment casting and application thereof. The modified composition comprises a viscosity reducer and a film assisting agent; the viscosity reducer comprises derivatives of soluble polycarboxylic acid; the film assisting agent contains at least one of diisopropanol adipate, low molecular polyvinyl alcohol or 2, 2, 4-trimethyl 1, 3-glutaryl glycol monoisobutyrate; and the mass ratio of the viscosity reducer to the film assisting agent is 1: (2.5-4). Through the modified composition, the modified binding agentis stable in performance, so that the powder-liquid ratio of surface layer sizing agents is increased, such defects as smaller thickness and weaker compactness of the surface coating layer are improved, and the strength and the quality of the surface layer are greatly improved. 本发明公开了一种钛合金熔模铸造用粘接剂的改性组合物及其应用，包括降粘剂和助膜剂，所述降粘剂包括可溶性聚羧酸的衍生物；所述助膜剂包含二异丙醇己二酸酯、低分子量聚乙烯醇或2,2,4-三甲基1,3-戊二醇单异丁酸酯中的至少一种，所述降粘剂和助膜剂的质量比为1：(2.5～4)。通过本发明方案的改性组