双液改性低成本铸造呋喃树脂的生产工艺

Manufacturing Process of Two-Liquid Modified Furan Resin with Low Cost

介绍了用多聚甲醛、多缩醇液、多羟基醛液制作改性低成本铸造呋喃树脂的环保工艺。该树脂在制作过程中无需脱水,因此不污染环境,节约环保费用,提高制作效率。该树脂用多缩醇液和改性多羟基醛液即双液进行改性。多缩醇是生产多元醇产品的蒸馏残液,通常作为废物处理,因此它的使用成本低。多羟基醛价格也远低于糠醇,改性后用来代替部分糠醇,此两者的加入量为树脂含量的8%~10%,这样树脂总成本大为降低。该工艺制作树脂可以废物利用,无需环保设备,并适合小微企业生产,符合国家扶持小微企业的政策。

The manufacturing process of the modified foundry furan resin with low cost and environment protection using paraformaldehyde,polycondensation alcohol liquid and polyhydroxy aldehyde liquid is introduced.In the process of making the resin,no dewatering was needed,so there was no environment pollution,thus the expenses for environment protection was saved,and the efficiency of manufacturing was also enhanced.The resin was modified by both polycondensation alcohol liquid and polyhydroxy aldehyde liquid,i.e.two liquid.The polycondensation alcohol is distillation residue of polyols,and treated as wastes,so its cost of use is extremely low.The price of polyhydroxy is much less than of furan methanol.With the polyhydroxy substituting part of furan methanol,the content of the two modifiers in resin was 8%-10%,so the total cost of the modified resin was lowered highly.Since this process for manufacturing the modified resin can make use of wastes,and no environment protection equipment is needed,it is suitable for the production of micro and small enterprises,which is consistent with national policy supporting micro and small enterprises.