Page 176 - 精细化工2020年第2期

第 37 卷第 2 期 精 细 化 工 Vol.37, No.2
202 0 年 2 月 FINE CHEMICALS Feb. 2020

橡塑助剂
具有亲/疏水链端的混合封端型水性聚氨酯

任龙芳 1,2 ，牛巧宣 1,2

（1. 陕西科技大学 轻工科学与工程学院，陕西 西安 710021；2. 陕西科技大学 轻化工程国家级实验教
学示范中心，陕西 西安 710021）

摘要：以异佛尔酮二异氰酸酯（IPDI）、聚己二酸-1,4-丁二醇酯二醇（PBA2000）、2,2-二羟甲基丙酸（DMPA）
合成聚氨酯预聚体（PPU），以部分封端的羟基硅油（MPSi）作为疏水封端剂，以与 MPSi 同等物质的量的氨基
乙酸（Gly）作为亲水封端剂，合成具有亲/疏水链端的混合封端型水性聚氨酯（MEPU）。研究了 r 值〔n(IPDI)∶
n(PBA2000)〕、DMPA 用量（以 IPDI 和 PBA2000 的总质量为基准，下同）、MPSi 用量（以 PPU 的总质量为基
准，下同）对 MEPU 性能的影响。结果表明，当 r=3.0、w(DMPA)=5%、w(MPSi)=15%时，MEPU 乳液稳定透
明，与未改性的水性聚氨酯相比，MEPU 胶膜吸水率由 16.7%减小到 9.5%，水接触角由 74.5°增加到 92.6°，初
始分解温度由 264 ℃提高到 293 ℃，拉伸强度提高了 0.11 MPa，断裂伸长率提高了 5.81%。在不改变乳液稳定
性的基础上，MEPU 胶膜耐水性和耐热性明显提高。
关键词：水性聚氨酯；有机硅；耐水性；乳化性；橡塑助剂
中图分类号：TQ330；TQ323.8 文献标识码：A 文章编号：1003-5214 (2020) 02-0378-07

Mixed end-capped waterborne polyurethane with
hydrophilic/hydrophobic chain ends

1,2
1,2
Ren Longfang , Niu Qiaoxuan
（1. College of Light Industry Science & Engineering, Shaanxi University of Science & Technology, Xi'an 710021,
Shaanxi, China; 2. National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi
University of Science & Technology, Xi'an 710021, Shaanxi, China）

Abstract: Polyurethane prepolymer (PPU) was synthesized from isophorone diisocyanate (IPDI),
poly(1,4-butanediol adipate) diol (PBA2000) and 2,2-dimethylol propionic acid (DMPA). Subsequently,
hydrophilic/hydrophobic end-capped waterborne polyurethane (MEPU) was prepared using partially
blocked hydroxy silicone oil (MPSi) as hydrophobic end-capped agent and glycine (Gly) as hydrophilic
end-capped agent, in which, MPSi and Gly had the same molar amount. The effects of r value
[n(IPDI):n(PBA2000)], DMPA content (based on the total mass of IPDI and PBA2000, the same below),
and MPSi content (based on the total mass of PPU, the same below) on the performances of MEPU were
studied. The results showed that under the conditions of r=3.0, w(DMPA)=5%, w(MPSi)=15%, the prepared
MEPU emulsion was stable and transparent. Compared with those of unmodified waterborne polyurethane,
the water absorption rate of MEPU latex film decreased from 16.7% to 9.5%, the water contact angle
increased from 74.5° to 92.6°, the initial decomposition temperature increased from 264 ℃ to 293 ℃, the
tensile strength increased by 0.11 MPa, and the elongation at break increased by 5.81%. The water
resistance and heat resistance of MEPU latex film were improved significantly without changing the
stability of emulsion.
Key words: waterborne polyurethane; silicone; water resistance; emulsibility; rubber and plastics auxiliaries

[1]
水性聚氨酯（WPU）以水作溶剂，减少了有机 溶剂带来的环境污染，更符合当今环保的要求 。

收稿日期：2019-05-31; 定用日期：2019-08-04; DOI: 10.13550/j.jxhg.20190492
基金项目：陕西省科技计划项目（2018JM5164）
作者简介：任龙芳（1981—），女，教授，博士，E-mail：renlf1010@163.com。