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Chemcial Industry and Engineering 2023, Vol. 40 Issue (2) :9-16    DOI: 10.13353/j.issn.1004.9533.20210362
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Preparation and properties of waterborne polyurethane hot melt adhesive
MEN Yuanli, LIU Chen, GENG Jiaqi, YUAN Caideng
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China

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Abstract 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.
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MEN Yuanli
LIU Chen
GENG Jiaqi
YUAN Caideng
Keywordswaterborne polyurethane   hot melt adhesive   bonding strength   lap shear strength     
Received 2021-05-08;
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MEN Yuanli, LIU Chen, GENG Jiaqi, YUAN Caideng.Preparation and properties of waterborne polyurethane hot melt adhesive[J]  Chemcial Industry and Engineering, 2023,V40(2): 9-16
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