脲醛改性呋喃树脂外观和性能的影响因素研究  

Study on Factors Influence Appearance Stability and Properties of Furan Resin Modified by Urea-Formaldehyde

作　　者：高红梅[1] 黄仁和[1] 伊宁[1] 邱学明[2] 

机构地区：[1]山东科技大学化学与环境工程学院,山东青岛266510 [2]济南钢铁总公司,山东济南250101

出　　处：《铸造》2011年第3期294-298,共5页Foundry

摘　　要：研究了脲醛改性呋喃树脂制备过程中加成阶段甲醛与尿素的摩尔比(F/U),加成及缩聚阶段的pH值、反应温度、反应时间等因素对树脂外观和性能的影响,分析了导致树脂浑浊、分层、放置出现沉淀的原因,总结了各工艺条件与树脂性能的关系。制备出了树脂砂强度高、外观透明、储存稳定性较好的树脂。The factors that affect the appearance stability and properties of urea-formaldehyde modified furan resin during the preparation process were studied,such as the molar ratio of formaldehyde-to-urea（F/U）in addition stage,the pH values,reaction temperature and reaction time in addition and condensation stages.The reason that lead to the turbidity,layered and precipitation of the resin was analyzed,and the relationship between process conditions and the properties of resin was summarized.Finally,the transparent uniform resin with good appearance stability was prepared.

关 键 词：脲醛改性呋喃树脂 外观稳定性 游离醛 

分 类 号：TG221[金属学及工艺—铸造]