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Abstract�� Polyisocyanate with biuret structure was produced by the reaction of crystalline sodium sulfate with hexamethylene diisocyanate(HDI).Continuous extraction apparatus was improved to separate the free HDI monomer in the mixture.The paint compounded with the product and hydroxyl acrylic resins was of good performance.

Keywords�� hexamethylene diisocyanate biuret crystalline sodium sulfate

Received 1999-04-15;

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��,��ΰ,��С��,��,ͿΰƼ,�»��.�ýᾧ��ƺ�HDI�ϳ��Ĺ��̽��[J]. ��ѧ��ҵ�빤��, 1999,16(2): 55-57

Yang Ling Chen Wei Liu Xiaohong Fan Qiongjia Tu Weiping Chen Huanqin .Synthesis of Biuret Using HDI and Crystalline Sodium Sulfate[J]. Chemcial Industry and Engineering, 1999,16(2): 55-57