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该文主要利用松香和TDI合成聚氨酯预聚体,利用甲基二乙醇胺扩链,最后用亚硫酸氢钠作封闭剂,最后乳化得到阳离子松香型聚氨酯。同时,将此种施胶剂应用造纸湿部中,研究了扩链剂用量,pH及APAM用量对聚氨酯施胶性能的影响。实验表明,此种施胶剂在中碱性环境中施胶效果较好。
In this paper, the main use of rosin and TDI polyurethane prepolymer, the use of methyldiethanolamine chain extension, and finally with sodium bisulfite as a blocking agent, and finally emulsified cationic rosin-type polyurethane. At the same time, this kind of sizing agent was applied to the wet end of paper making. The effect of chain extender dosage, pH and APAM dosage on sizing property of polyurethane was studied. Experiments show that this sizing agent sizing effect in the alkaline environment is better.