摘要
以改性二苯基甲烷二异氰酸脂和聚醚多元醇等为原料,合成了噁唑烷潜固化剂改性聚氨酯预聚体,讨论了预聚体的异氰酸酯基含量及噁唑烷潜固化剂用量对固化性能的影响。结果表明,通过傅立叶变换红外光谱(FT-IR)对预聚体成膜的固化动态进行了分析表征,当NCO基质量分数为2.3%、噁唑烷潜固化剂质量分数为2.5%～3.5%时,预聚体固化时不产生发泡膨胀;固化20h后反应完全。
The polyurethane prepolymer modified by oxazolidine latent curing agent was synthesized using modified MDI and polyether polyols. The effect of NCO group content,the amount of oxazolidine latent curing agent on curing condition were studied. The results indicated that when NCO group content was 2.3% , the amount of oxazolidine latent curing agent was 2.5% - 3.5% , the polyurethane prepolymer could not have the phenomenon of expansion and foaming when it was curing. Dynamic curing was analyzed by FT-IR, prepolymer was cured completely after curing 20 hours.
出处
《聚氨酯工业》
北大核心
2010年第2期21-24,共4页
Polyurethane Industry
关键词
噁唑烷潜固化剂
聚氨酯预聚体
性能
oxazolidine latent curing agent
polyurethane prepolymer
property
