CO_2硬化酚醛树脂的合成及其促硬剂的研究  

Synthesis of CO2-Cured Phenol Formaldehyde Resin and Study on Its Hardening-Promoter

作　　者：刘晓宏 刘伟华[1] 宋来[1] 李英民[1] LIU Xiao-hong;LIU Wei-hua;SONG Lai;LI Ying-min(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,Liaoning,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110870

出　　处：《铸造》2020年第3期263-265,共3页Foundry

摘　　要：通过正交试验对CO_2硬化碱性酚醛树脂的合成工艺进行了优化,混砂时添加了一种促硬剂来提高其粘结强度。以抗拉强度为考核指标,当树脂加入量为2.5%,促硬剂的加入量(占砂)为0.4%,CO_2吹气时间为60 s时,所得砂型的即时强度为0.42 MPa,24 h抗拉强度为1.15 MPa,能够满足铸造生产的要求。The synthesis process of CO2 hardening alkaline phenolic resin was optimized through orthogonal test.When sand was mixed,a hardening agent was added to improve its bond strength.The tensile strength was used as the assessment index.When the resin content was 2.5%,the amount of hardening agent powder(accounting for sand)was 0.4%,and the CO2 blowing time was 60 s,the immediate strength of the sand mold was 0.42 MPa,and the tensile strength of 24 h was 1.15 MPa,which can meet the requirements of casting production.

关 键 词：CO2硬化 酚醛树脂 合成工艺 促硬剂 

分 类 号：TG221[金属学及工艺—铸造]