摘要
研究了聚乙烯醇改性脲醛树脂胶粘剂的制备工艺和配方。实验得出:添加适量聚乙烯醇改性剂,甲醛和尿素的最佳物质的量的比为1.5:1,尿素分3次投料,反应温度控制在100℃左右,反应时问60min,可制得综合性能较好的低毒耐水脲醛树脂胶粘剂。产品质量稳定,固含量〉55%,粘度=120~150s,产品质量达到国家规定的指标。
The paper studies the preparation of urea - formaldehyde resin adhesive modified by polyvinyl alcohol (PVA). The experiments turn out: adding appropriate PVA modifiers, the molar ratio of formaldehyde to urea 1. 5 : 1, adding urea in three portions, reaction temperature 100 ℃, reaction time 60 min. The low - toxic, water - resisting urea - formaldehyde resin adhesive with good comprehensive performances was obtained. The solid content of the product is more than 55 %, and the viscosity is from 120 s to 150 s, the quality follows the criterion regulated by the nation.
出处
《当代化工》
CAS
2006年第2期87-89,共3页
Contemporary Chemical Industry
关键词
脲醛树脂胶
聚乙烯醇
改性
urea- formaldehyde resin adhesive
polyvinyl alcohol
modify