摘要
脲醛树脂可作为包膜缓释氮肥的包膜材料。将经过缩合聚合过程得到的分子量不同的线型或支链型树脂喷涂于氮肥颗粒上，在酸性和加热的涂膜条件下，使之在颗粒表面上交联成膜。这种膜具有明显缓释作用。通过在尿素样片上涂膜和浸泡试验，可以得出这种树脂膜的控制释放速率曲线，定量地检验出这种膜的缓释效果。
Linear or branched urea-formaldehyde resins of different molecular weight were sprayedon nitrogen fertilizer grains,then cured by heating under acidic conditions to form release-controlled fertilizer. The releasing rate of the nitrogen fertilizer coated with urea-formalde-hyde was quantitatively determined by diffusion method.
出处
《石油化工》
CAS
CSCD
北大核心
1994年第12期816-819,共4页
Petrochemical Technology
关键词
缓释
氮肥
脲醛树脂
速率
测定
包膜
release-controlled nitrogen fertilizer, urea,formaldehyde resin,controlled-releasing
