【摘要】 通过嵌段聚合引入亲水基因COOH制得自乳化聚氨酯乳液。就亲水基因的含量和固含量对乳液的影响进行探讨。结果表明，亲水基团愈多，乳液粒径愈小，粘度愈大，成膜物吸水率愈高；当ωCOOH约为0．99％时，浸泡一周时失重率最小。因含量愈高，乳液粒径愈大，乳液愈不稳定，随着固含量增大，粘度先增大后减小。当ωCOOH为1．05％，固含量≤30％时，乳液稳定性好，贮存期大于一年。更多还原

【Abstract】 By intercalating hydrophilic group COOH, the self-emulsifying Polyurethane emulsion is prepared. The effects of the hydrophilic group content and solid content on polyurethane emulsion are studied. The results indicate that the higher hydrophilic group content, the smaller is particle diameter of emulsion, the higher are viscosity of emulsion and water absorption of film;When COOH content is 0. 99 %,the rate of loss in weight is minimun. The higher the solid content,the bigger the particle diameter of emulsion, the worse the stability of emulsion;the viscosity of emulsion vary with solid contents when COOH content is 1. 05% and solid content is 30% or less, the stability of emulsion is good,and the storage life is over a year.更多还原