腰果酚改性呋喃树脂的性能研究

Study on Properties of Cardanol Modified Furan Resin

研究了腰果酚与多聚甲醛的反应比例,探索了腰果酚替代苯酚后对呋喃树脂密度、粘度等理化指标的影响,测试了腰果酚改性后树脂的工艺性能,型砂强度、发气量等。结果表明,腰果酚与多聚甲醛的质量反应比例为12/50,腰果酚替代苯酚比例为50%时,树脂性能最佳。对于标准砂和回收砂,使用时间tk与起模时间tq之间的比值σ分别为0.13和0.24,强度分别为1.74 MPa和0.83 MPa,可以满足生产上造型的需求。因腰果酚价格只有苯酚的一半左右,可实现每吨降低成本560元。

Cashew phenol popularly know as cardanol is a monohydroxyl phenol.In the present research,the reaction ratio between cashew phenol and paraformaldehyde was studied.The effect of cardanol-phenol mixture,a substituted phenol by cardanol,in different ratios,on the density,viscosity and other physical and chemical indexes of furan resin were analyzed.In addition,technological properties of the cardanol modified resin,such as gas evolution and strength,were tested.The results show that the reaction ratio of cardanol to paraformaldehyde was 12/50;when the ratio of cardanol to phenol(C/P ratio)was 50%,the best properties of the resin were obtained.For the standard sand and recovery sand,the ratioσof working time tk to striping time tq was 0.13 and 0.24 respectively,and the strength was 1.74 MPa and 0.83 MPa respectively,which can meet the production requirements.Since the cost of cardanol is about half of phenol,the production cost can be reduced by 560 yuan/ton.