热交联反应性湿增强剂EA/WEP/PAE的制备及增强性能研究

Preparation and Application of Thermal Crosslinking and Reactive Wet Strength Agent EA/WEP/PAE

采用两步法并加入乙醇胺（EA）和交联剂水溶性环氧树脂（WEP）对聚酰胺多胺环氧氯丙烷（PAE）进行改性,讨论了影响其合成的因素;并采用阴离子聚丙烯酰胺（APAM）作助留剂和阳离子改性PAE同时应用于棉浆抄纸.研究结果表明,n（NH2）/n（COOH）=1.05,n（EPA）/n（EPI）=1.5,n（EA）/n（EPA）=0.08,WEP用量10%,合成温度为60～70℃时,改性PAE对棉浆有很好的增湿强效果.当改性PAE用量为1.0%,助留剂APAM加入量0.3%（相对绝干浆料）,浆料pH值7～8时,成纸的湿强度可达39.8%,耐折度达3435次,裂断长达7.43km.

PAE simultaneously modified by EA and WEP was successfully prepared through a two-step process. The factors affecting the preparation of modified PAE were discussed, and the applied experiment was carried out. Retention aid APAM and cationic PAE were simultaneously applied to the cotton pulp. The results showed that when n（NH2）/n（COOH） = 1.05, n（EPA）/n（EPC） = 1.5, n（EA）/n（EPA） = 0.08, dosage of WEP is 10%, the synthesizing temperature is 60℃- 70℃, EA/WEP/PAE is a kind of reactive wet strength agent with high efficiency. The wet strength of the cotton pulp can reach 39.8%, folding endurance is 3435（double times） and breaking length is 7.43 km when the dosage of EA/WEP/PAE is 1.0% and the retention aid APAM is 0.3%.