Environment-friendly water-resistant tannin-based wood adhesive and preparation method thereof

The invention belongs to the technical field of synthesis and preparation of artificial board adhesives, and particularly relates to an environment-friendly epoxy tannin resin-based polyurea adhesive and a preparation method thereof. The copolycondensation adhesive is prepared by taking epoxidized tannin, triethylene tetramine and urea as main raw materials through graft copolymerization and deamination reaction synthesis, and compared with a traditional tannin resin adhesive and a traditional polyurea adhesive, the copolycondensation adhesive is good in water resistance, free of formaldehyde release and wide in application prospect. 本发明属于人造板胶黏剂合成制备技术领域，具体涉及一种环保型环氧单宁树脂基聚脲胶黏剂及其制备方法；具体是以环氧化单宁、三乙烯四胺和尿素为主要原料经过接枝共聚和脱氨反应合成制备而得，相比于传统的单宁树脂胶黏剂和聚脲胶黏剂，该共缩聚胶黏剂耐水性好，无甲醛释放，应用前景广阔。