蓖麻油-丙烯酸酯改性的双组分水性聚氨酯胶粘剂研究

Study of Modification of Two-component Waterborne Polyurethane Adhesive by Castor Oil and Acrylate

以聚醚多元醇(N220)、甲苯二异氰酸酯(TDI-80)、蓖麻油(C.O)、甲基丙烯酸甲酯(MMA)为主要原料,合成了蓖麻油改性的水性聚氨酯(WPUCA)复合乳液。向该复合乳液中加入固化剂,得到复合软包装用双组分改性水性聚氨酯胶粘剂。研究了蓖麻油的添加量以及丙烯酸酯和聚氨酯比例对改性后乳液及胶膜各项性能的影响,同时研究了多异氰酸酯固化剂用量及固化时间对胶粘剂粘结性的影响。实验结果表明,蓖麻油的添加量为3.0%(质量分数),PA、PU质量比为1∶2,固化剂含量为6%(质量分数),固化时间为4h,胶粘剂的性能达到较佳。

Polyurethane hybrid emulsion modified by caster oil and arylate was synthesized with toluene diisocyanate （TDI）, polycaprolactone glycol （ PCL220N）, castor oil, and methyl methacrylate （ MMA）. Then the curing agent was added and the two-component modified waterborne polyurethane adhesive for laminated film was made. The effects of castor oil content and ratio of acrylate and polyurethane on the properties of WPUCA and its film were investigated; and the effects of content of polyisocyanate curing agent and curing time on the adhesive properties were studied. The experimental results showed that the adhesive property of the modified waterborne polyurethane is the best when the content of castor oil is 3.0%, the ratio of PA/PU is 1/2, content of curing agent is 6%, and curing time is 4h.