摘要
采用先氨酯改性再三聚的方法合成了TDI三聚体溶液，并将其用于高回弹泡沫的制备。讨论了聚醚多元醇种类、预聚体NCO含量及三聚催化剂用量对TDI三聚体溶液的影响，并考察了TDI三聚体溶液对高回弹泡沫阻燃性、黄变性等的影响。结果表明，采用复配多元醇对TDI进行氨酯改性，预聚体NCO质量分数为38．0％，每100份TDI预聚体添加0．0375～0．0500份三聚催化剂时，可获得粘度为100～250mPa·s的TDI三聚体溶液，该三聚体溶液可稳定贮存6个月以上，0cI二不结晶。TDI三聚体溶液可有效提高泡沫的阻燃性，并在一定程度上改善泡沫的耐黄变性。
TDI trimer solution was synthesized by urethane modification before trimerization reaction and high resilience foam was prepared with synthesized TDI trimer solution.The effect of types of polyether polyol, NCO content of prepolymer and amount of trimerization catalyst on TDI trimer solution was studied and the effect of TDI trimer solution on flame retardancy, yellowing and other physical properties of the high resilience foam was also studied. The results showed that TDI trimer solution with the viscosity between 100 and 250 mPa. s was prepared when the urethane modifier was using mixed polyols, the prepolymer NCO mass ratio was 38.0% and the amount of trimerization catalyst was 0. 0375-0. 0500 portions in 100 portions TDI prepolymer. The trimer solution could be stored stably for more than 6 months without crystallization at 0℃. The obtained TDI trimer solution could effectively improve the flame retardancy and the yellowing of the high resilience foam to some extent.
出处
《聚氨酯工业》
北大核心
2015年第2期32-35,共4页
Polyurethane Industry
关键词
TDI三聚体
高回弹泡沫
阻燃
黄变
储存稳定性
耐冻性
TDI trimer
high resilience foam
flame retardancy
yellowing
storage stability
freezing resistance
