摘要
聚氨酯丙烯酸酯预聚体的制备是由二步反应完成 ,本文对预聚体合成过程中各种影响因素进行分析比较 ,确定最佳合成聚氨酯丙烯酸酯预聚体的工艺条件为 :第一步反应温度为 6 0~ 6 5℃ ,时间为4h ,n(NCO) :n(OH) =3,催化剂为物料总量的 0 4 % ,第二步反应温度为 70~ 75℃ ,时间为 4h。
The preparation of polyurethane acrylates prepolymer was composed of two steps.In this paper,every kinds of effect factors were compared and analyzed.The optimal technics of polyurethane acrylates prepolymer preparation was determined.In the first step,the temperature and time of reaction were 60~65℃ and 4h respectively.The ratio(mol)of NCO to OH was 3∶1 and the amount of catalyst was 0 4%.In the second step,the temperature and time of reaction were 70~75℃ and 4h respectively.
出处
《化学工程师》
CAS
2004年第5期13-14,22,共3页
Chemical Engineer