水性木材胶粘剂的制备与性能研究

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以PVA(聚乙烯醇)的醇水溶液、羟基丙烯酸酯乳液为主要原料,制得API(水性高分子-异氰酸酯)胶粘剂的主剂;然后以PAPI(多亚甲基多苯基多异氰酸酯)、DOP(邻苯二甲酸二辛酯)为主要原料,制得API交联剂。研究结果表明:PVA水溶液中有乙醇存在时,能有效提高API胶粘剂的胶接强度;当主剂中m(PVA醇水溶液)∶m(羟基丙烯酸酯乳液)=60∶30、m(水)∶m(乙醇)=78.5∶21.5和m(主剂)∶m(交联剂)=100∶15时,API胶粘剂的胶接强度和耐水性俱佳,并且其成本相对较低。 The main agent of the API (water-based polymer-isocyanate) adhesive is prepared by using PVA (polyvinyl alcohol) alcohol solution and hydroxy acrylate emulsion as the main raw materials, and then PAPI (polymethylene polyphenyl polyisocyanate), DOP (Dioctyl phthalate) as the main raw material, obtained API crosslinking agent. The results show that the presence of ethanol in PVA aqueous solution can effectively improve the bonding strength of API adhesive. When the main agent m (PVA alcohol aqueous solution): m (hydroxy acrylate emulsion) = 60:30, m (Ethanol) = 78.5: 21.5 and m (main agent): m (crosslinker) = 100: 15, the API adhesive has excellent adhesive strength and water resistance, and its cost is relatively low.
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