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

作　　者：张欣钊 王功海 黄华健 叶清泉 杜正位 Zhang Xinzhao;Wang Gonghai;Huang Huajian;Ye Qingquan;Du Zhengwei(Winsin Materials,Inc.,Jiangmen 529000,China)

机构地区：[1]广东元星工业新材料有限公司,广东江门529000

出　　处：《广东化工》2024年第22期43-44,53,共3页Guangdong Chemical Industry

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。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 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]