化工进展

• 材料科学与技术 • 上一篇    下一篇

蓖麻油改性聚醚型水性聚氨酯乳液的性能

蒋洪权,宋湛谦,商士斌,尹延柏   

  1. 中国林业科学研究院林产化学工业研究所;国家林业局生物质化学利用国家工程实验室;
    国家林业局林产化学工程重点开放性实验室
  • 出版日期:2010-02-05 发布日期:2010-02-05

Preparation and properties of castor oil-modified waterborne polyurethane emulsion

JIANG Hongquan,SONG Zhanqian,SHANG Shibin,YIN Yanbai   

  1. Institute of Chemical Industry of Forest Products,CAF;National Engineering Lab for Biomass Chemical Utilization;Key and Open Laboratory on Forest Chemical Engineering,SFA
  • Online:2010-02-05 Published:2010-02-05

摘要: 以聚醚、甲苯二异氰酸酯(TDI)、一缩二乙二醇、蓖麻油为主要原料,二羟甲基丙酸(DMPA)为亲水扩链剂,三乙胺为中和剂制备了稳定的阴离子水性聚氨酯乳液(WPU),研究了NCO/OH摩尔比、DMPA及蓖麻油的加入量对WPU的耐水性、稳定性和力学性能的影响,结果表明:改性后的乳液具有较好的稳定性,适量的蓖麻油可提高胶膜的拉伸强度及耐水性。当聚醚与蓖麻油质量比为7︰3、DMPA为5%、NCO与OH摩尔比为1.3时,WPU综合性能最好。

Abstract: Stable waterborne polyurethane (WPU) was synthesized from toluene diisocyanate (TDI),a polyether polyol and dihydroxymethylpropionic acid (DMPA) using castor oil as the crosslinking agent. Effects of NCO/OH,DMPA and castor oil on the water-resistance,stability and mechanical properties were investigated. Results showed that the castor oil modified WPU has better stability,and suitable amount of castor oil can improve the tensile strength and water-resistant properties of the film from WPU. The obtained WPU has excellent balanced properties when prepared with 7:3 mass ratio of polyether to castor oil,5% mass percent of DMPA,and 1.3 molar ratio of NCO to OH.

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