改性聚合MDI在聚氨酯高回弹泡沫中的应用

Application of modified polymeric MDI in polyurethane high resilience foam

研究了改性方案和改性剂对异氰酸酯组分黏度和高回弹泡沫性能的影响,确定了改性方案;考察了改性聚合MDI(二苯基甲烷二异氰酸酯)对高回弹泡沫力学性能、环保性能和外观的影响。结果表明,采用复合改性剂对聚合MDI按文中所述方案II进行改性,并将该改性聚合MDI与TDI(甲苯二异氰酸酯)掺混作为B组分,当m(改性聚合MDI):m(B组分)为15%时,所得B组分黏度适中,由其制备的高回弹泡沫在力学性能、环保性能和外观等方面均有所改善。

The influence of the modification scheme and the modifier on the viscosity of the isocyanate component and the performance of the high resilience foam was studied. The modification scheme was confirmed. The influence of the modified polymeric MDI（diphenylmethane diisocyanate） on the mechanical performance, environmental performance and appearance of the high resilience foam was investigated. The results show that using the complex modifiers to modify the polymeric MDI according to the said scheme II in the paper, and blending the modified polymeric MDI with TDI（toluene diisocyanate） as B component, when m（modified polymeric MDI） ：m（B component） is 15%, the viscosity of the obtained B component is moderate, and the mechanical performance, environmental performance and appearance of the high resilience foam prepared by it can be improved.