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Citation: ZHANG Qing-Si, ZHU Xiao-Li, LI Jun-Ying, LI Peng, ZHANG Jiang-Hua, LI Bao-Hai, GAO Yan-Hui. Synthesis and Structural Characterization of a Crosslinker for Waterborne Polyurethane[J]. Chinese Journal of Applied Chemistry, ;2004, 21(11): 1123-1126. shu

Synthesis and Structural Characterization of a Crosslinker for Waterborne Polyurethane

1.
a Shandong Institute of Light Industry, Ji'nan 250100;
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b School of Pharmaceutical Science, Shandong University, Ji'nan

Corresponding author: ZHANG Qing-Si,
Received Date: 31 October 2003
Available Online: 16 March 2004
Fund Project: 山东省教育厅科技项目(J02C10) (J02C10)

A dihydroxyl compound with ketonic moiety was synthesized by the Michael reaction between diethanolamine and diacetone acrylamide. The compound could be used as a crosslinker for waterborne polyurethane. The reaction process was studied by FT-IR, the optimal reaction conditions were n(DEA): n(DAAM)=1:1.01 at 80℃ for 8 h. The structure of the crosslinker was characterized by FT-IR and NMR. The molecular weight of the crosslinker was determined by MS. The crosslinking reaction between ketone and hydrazide during the film forming stage was monitored by FT-IR. It has shown that the crosslinking reaction occurs in the system containing volatile base(such as triethylamine) or in the acid system, but it can't take place in the system containing non-volatile base(such as sodium hydroxide).
- polyurethane,
- waterborne polyurethane crosslinker,
- Michael reaction,
- reaction between ketone and hydrazide
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