水性聚氨酯热熔胶的制备及性能  

Preparation and properties of waterborne polyurethane hot melt adhesive

作　　者：门园丽 刘晨 耿佳琦 袁才登[1] MEN Yuanli;LIU Chen;GENG Jiaqi;YUAN Caideng(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学化工学院,天津300350

出　　处：《化学工业与工程》2023年第2期9-16,共8页Chemical Industry and Engineering

摘　　要：以甲苯二异氰酸酯、聚己二酸-1,4-丁二醇酯(PBA)、聚环氧丙烷醚三醇(PPO)为主要单体,2,2-二羟甲基丙酸(DMPA)为羧基单体,1,4-丁二醇为扩链剂合成了聚氨酯预聚体,并以三乙胺为中和剂,进一步制备了阴离子水性聚氨酯乳液。考察了交联单体PPO含量对乳液及胶膜性能的影响。结果表明,n(PBA)∶n(PPO)=9∶1时,乳液稳定性好,聚氨酯膜的拉伸强度为44.18 MPa,断裂伸长率为742.94%,其热分解温度为239℃,对皮革的黏接强度高于皮革的内聚强度,对不锈钢的黏接剪切强度为14.76 MPa。The polyurethane prepolymer was synthesized using toluene diisocyanate,poly(butylene adipate)diol(PBA)and poly(propylene oxide)triol(PPO)as main monomers,2,2-dimethylolpropionic acid(DMPA)as carboxylic monomer and 1,4-butanediol(BDO)as chain extender.Anionic waterborne polyurethane emulsion was further prepared using triethylamine(TEA)as neutralizer.The effect of PPO content on the properties of emulsion and polyurethane film was investigated.The results show that when n(PBA)∶n(PPO)=9∶1,the prepared emulsion has good stability,the tensile strength and elongation at break of the polyurethane film are 44.18 MPa and 742.94%,respectively,the thermal decomposition temperature is 239℃,the bonding strength to leather is higher than the cohesive strength of the leather and the lap shear strength to stainless steel is 14.76 MPa.

关 键 词：水性聚氨酯 热熔胶 黏接强度 搭接剪切强度 

分 类 号：TQ433.4[化学工程]