NIRS测定水性树脂预聚体中NCO的方法研究  

Research on Determination of NCO Content in Waterborne Resin Pre Polymer by NIRS

作　　者：刘翔 李键 陈艳玲 

机构地区：[1]万华化学(宁波)有限公司,浙江宁波315812

出　　处：《广州化工》2016年第13期128-130,142,共4页GuangZhou Chemical Industry

摘　　要：在水性树脂产品生产工艺中,降温后预聚体中NCO含量是否控制在一定的指标范围之内,关系着后续分散扩链工艺的顺利进行,影响着产品的应用性能。目前,预聚体中NCO含量分析方法的一般需时为35 min,加上取样时间,不能满足水性树脂生产时对NCO含量的即时掌握,降低了生产过程中的可控性。近红外光谱仪代替电位滴定测定水性预聚体中NCO含量,可将预聚体含量的分析时间缩短为5~10 min,并降低了分析成本,同时新方法的准确度和精密度都能满足要求。Cooled NCO content in pre polymers was controlled in the range of certain indicators,relationship with subsequent extender chain process smoothly,influenced the application performance of the product.Currently,NCO content analysis method in pre polymers generally took for 35 min,adding sampling time cannot satisfy the waterborne resin production instant control of NCO content,reduced the control in the process of production.Near infrared spectrometer instead of potentiometric titration in the determination of water-based PU pre polymers,NCO content analysis in the process of the dimer content can be shorter time for 5 ~ 10 min,and reduce the cost analysis,at the same time,the new method can meet the requirements of precision and accuracy.

关 键 词：近红外光谱仪 电位滴定仪 NCO 

分 类 号：O656.35[理学—分析化学]