投料工艺对浇注型聚氨酯预聚体性能的影响
Influence of Feeding Process on the Properties of Casting Polyurethane Prepolymer
张欣钊 1王功海 1黄华健 1叶清泉 1杜正位1
作者信息
- 1. 广东元星工业新材料有限公司,广东 江门 529000
- 折叠
摘要
在设计配方一致的情况下,研究了不同投料速度和投料方式对聚氨酯预聚体、聚氨酯弹性体的影响.结果表明一次快速投料与两次间歇投料,物料在釜内最高反应放热温度微有差异;所得预聚体NCO值基本无差异;两次间歇投料工艺所得预聚体游离TDI含量更低,黏度更均一;两次间歇投料工艺反应而成的预聚体,固化后制得的弹性体撕裂强度更高.
Abstract
Under the same design formula,the effects of different feeding speeds and feeding methods on polyurethane prepolymer and polyurethane elastomers were studied.The results showed that there was a little difference in the maximum exothermic temperature of the material in the kettle between one rapid feeding and two intermittent feeding;The NCO values of the obtained prepolymer showed no significant difference;The free TDI content of the prepolymer obtained by the two intermittent feeding processes is lower and the viscosity is more uniform;The prepolymer formed by the reaction of two intermittent feeding processes has higher tear strength in the cured elastomer.
关键词
投料工艺/聚氨酯预聚体/聚氨酯弹性体/NCO值/游离TDI含量/撕裂强度Key words
feeding process/polyurethane prepolymer/polyurethane elastomer/nco value/free tdi content/tear strength引用本文复制引用
出版年
2024
NETL
NSTL
万方数据