水分含量对脲醛呋喃树脂性能的影响分析

摘要

Paraformaldehyde has used instead of part of formaldehyde to form synthesis urea-formaldehyde furan resin. The influence of moisture on resin strength, free formaldehyde, viscosity, up time and stripping time have been investigated. The results showed that, with increasing water content, the strength of resin continued to decrease, free formaldehyde increased, the viscosity lowered, up time and stripping time for resin sand were all extending.%使用多聚甲醛代替部分甲醛水溶液合成不同水分含量的脲醛呋喃树脂，考察不同含水量对树脂强度、游离甲醛、粘度及树脂砂可使用时间、起模时间等性能的影响。结果表明，随着水分含量增多，脲醛呋喃树脂的强度下降、游离甲醛升高、粘度降低，树脂砂的可使用时间和起模时间延长。