Plywood aldehyde-free soybean protein glue and preparation method thereof

The invention discloses plywood aldehyde-free soybean protein glue and a preparation method thereof. The aldehyde-free soybean protein glue is prepared from following components: 25 parts of separatedsoybean protein powder, 200-300 parts of deionized water, 25-35 parts of 5% of a sodium hydroxide solution by mass, 20-25 parts of a PAE crosslinking agent for polyamide polyamine epichlorohydrin resin and 5-10 parts of a preservative. The aldehyde-free soybean protein glue is non-poisonous and harmless, low in cost and better in adhesive property. By pressing of the plywood with the aldehyde-free soybean protein glue, the adhesive property of obtained plywood can meet the national standard requirement. 本发明公开了一种胶合板无醛大豆蛋白胶及其制备方法。本发明的无醛大豆蛋白胶由25份大豆分离蛋白粉，200～300份去离子水，25～35份质量分数为5％的氢氧化钠溶液，20～25份聚酰胺多胺环氧氯丙烷树脂PAE交联剂，5～10份防腐剂组成。本发明的无醛大豆蛋白胶无毒无害，价格低廉，具有较好的粘结性能。采用本发明的无醛大豆蛋白胶进行胶合板的压制，制得的胶合板的粘结性能符合国家标准要求。