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Citation: HU Fei, TANG Li-Ming, FANG Yu, QI Dong-Chao, ZHU Jian-Xun. Alkaline Phenol-Formaldehyde Resins Cured by Borate[J]. Chinese Journal of Applied Chemistry, ;2004, 21(1): 78-80. shu

Alkaline Phenol-Formaldehyde Resins Cured by Borate

HU Fei ^a ,
TANG Li-Ming ^a,, ,
FANG Yu ^a ,
QI Dong-Chao ^a ,
ZHU Jian-Xun ^b

1.
a Department of Chemical Engineering, Tsinghua University, Beijing 100084;
2.
b Jinan Shengquan Group Share-holding Co. LTD., Ji'nan

Corresponding author: TANG Li-Ming,
Received Date: 21 February 2003
Available Online: 7 July 2003

Three kinds of phenolic resins have been synthesized at pH of 3 (with phenol/formaldehyde molar ratio of 1:0.75 catalyzed by oxalic acid), 8(with phenol/formaldehyde molar ratio of 1:1.4~1:2.4 catalyzed by KOH) and 14(with phenol/formaldehyde molar ratio of 1:1.2~1:1. 5 catalyzed by KOH), respectively. Investigation on the crosslinking reaction between phenolic resins and borate showed that resin synthesized at basic condition can chelated with borate quickly by passing CO₂ through the resin sand. The results indicated that the cured casting of the resin synthesized at pH=14 possessed the highest mechanical strength.
- phenolic-formaldehyde resin,
- borate,
- chelate,
- resin sand
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