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The Research on One-Step Synthesis of DMDHEU Resin

YANG Jing-xin,YANG Lu-lu,JIANG Zi-jun,GU Chun-hao(School of Chemistry and Chemical Engineering,Nantong University,Nantong 226007,China)  
A one-step process for synthesizing DMDHEU resin was introduced and the effects of the factors on the synthesis such as the scale of urea and formaldehyde,pH value,reaction time and temperature were investigated.After comparing the test results of the amount of free formaldehyde of synthesized resin,the amount of released formaldehyde from the finished fabrics and the wrinkle recovery angle,the paper worked out an optimal synthesizing process that n(glyoxal) ∶ n(urea) ∶ n(formaldehyde) = 1∶1∶1.7;pH value was 5.7~5.9;reaction temperature was 70 ℃;heat preservation time was 3 h;and the free formaldehyde of synthesized resin was lower than 0.5 %.
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