摘要
以多元醇和二苯基甲烷4,4′-二异氰酸酯(MDI)为主要原料合成了不同-NCO含量的反应型湿固化聚氨酯热熔胶,阐述了固化机理,对其性能进行了测试。结果表明,以自制的多元醇,设定-NCO质量分数为4.0%时,添加适量的EVA和萜烯树脂改性,其性能最好,固化时间为20h,拉伸强度17.9MPa,伸长率430%,初粘强度2.9MPa,剪切强度16.9MPa,基本上满足了家具行业封边的要求。
The moisture-curable polyurethane hot-meh adhesives with different NCO content were synthesized from polyol and diphenyl methane-4,4＇- diisocyanate （MDI）. The curing mechanism was studied and the performances were tested. The results showed that the moisture-curable polyurethane hot-melt adhesives had the best mechanical properties when the NCO content in the self made polyol was 4.0 wt. %, the terpene-resin and EVA were added and the curable time was 20 hours, the tensil strength was 17.9 MPa, the elongation rate was 430%, the initial bond strength was 2.9 MPa, the shearing strength was 16.9 MPa. The hot-melt adhesive basically satisfied with the reguirements of edge sealing for furniture industry.
出处
《粘接》
CAS
2008年第1期18-21,共4页
Adhesion
关键词
湿固化
聚氨酯
热熔胶
家具封边
polyurethane
moisture-curable
hot-melt adhesive
furniture edge sealing
