新型改性PAE湿强剂的合成工艺  

Study on the Synthesis Technology of Low-Cost New Polyaminoamide Epichlorohydrin

作　　者：李旺[1] 胡惠仁[1] 

机构地区：[1]天津科技大学天津市制浆造纸重点实验室,天津300457

出　　处：《纸和造纸》2014年第5期32-37,共6页Paper and Paper Making

摘　　要：在传统聚酰胺多胺环氧氯丙烷树脂(PAE)的基础上,经过尿素改性制得了低成本新型聚酰胺树脂增湿强剂。第一步反应为缩聚反应,形成聚酰胺预聚体:二乙烯三胺(DETA)与己二酸(AA)的摩尔比为1.1:1,反应温度为170℃左右,保温时间为200 min,预聚体PA(50%)的黏度为340 mPa·s;第二步反应为尿素改性后与环氧氯丙烷(EPI)的交联化反应:尿素用量为PA(绝干)的20%,反应浓度为30%,反应温度为60℃,环氧氯丙烷用量为PA(绝干)的40%。本研究制得的PAE添加到浆料中,搅拌30 s,利用标准纸页成型器抄纸,然后在101℃的烘箱中熟化30min后,测得加入自制PAE的纸页抗张强度保留率为24.5%左右,自制PAE不但具有增湿强效果,而且还具有抗水性。与传统PAE相比,自制改性PAE的抗水性更优。In the present work, a new type of low-cost PAE wet-strength agent was prepared by the modification of urea based on the traditional agent. The first step was a polycondensation to form the polyamide prepolymer（PA）, the molar ratio of diethylenetriamine （DETA） and adipic acid （AA） was 1.1：1, the reaction temperature was about 170℃, holding time was 200min, the viscosity of PA （50%） was 340 mPa·s. The second step was crosslinked reaction of epichlorohydrin （EPI） after the urea-modification, dosage of urea was 20% of PA （absolute dry PA）, the reaction concentration was 30%, temperature was 60℃, epichlorohydrin was 40% of PA （absolute dry PA）. The PAE obtained in this study was added to pulp and stirred 30s to form sheet, then it was cured in the oven at 101℃ about 30min, the tensile strength retention ratio is about 24.5%. Not only did the modified PAE have wet strength effect, but also it has property of water resistant. Compared with traditional PAE, the water resistance of modified PAE was well.

关 键 词：增湿强剂 PAE 环氧氯丙烷 尿素 

分 类 号：TS727.2[轻工技术与工程—制浆造纸工程]