摘要
采用丙酮溶解预聚体,甲苯-二正丁胺为反应体系,考察不同溶剂及反应时间对聚氨酯预聚体中异氰酸酯含量测定的影响,同时考察了溶剂用量对测定结果的影响。结果表明,丙酮为溶剂,甲苯-二正丁胺与异氰酸根反应,结果准确度在国家标准允许范围内,测定异氰酸根含量结果与理论值基本一致。
The effects of different solvents and reaction times on determination of isocyanate group content in polyurethane prepolymer were studied, reaction system was toluene-butylamine using acetone dissolving prepolymet. Meanwhile the influence of the solvent dosage on the test results was investigated. The tests showed that the result accuracy was in the extent permitted of national standard when solvent was acetone, isoeyanate reacted with toluene-dibutylamine. The test result of isocyanate group content was consistent with theoretical values.
出处
《聚氨酯工业》
2014年第3期44-46,共3页
Polyurethane Industry
关键词
聚氨酯预聚体
溶剂
异氰酸根含量
二正丁胺
polyurethane prepolymer
solvent
isocyanate group content
dibutylamine
