MODIFICATION OF EPOXY RESIN WITH MALEIC ANHYDRIDE AND SODIUM HYDROGEN SULFITE

Abstract

Abstract: Epoxy resin was modified by maleic anhydride, then reacted with sodium hydrogen sulfite to attach sulfonyl group on it. The effects of reaction temperature,catalyst amount,the concentration of raw materials,and the ratio of mixed solvents on the synthesis process were investigated experimentally during the process of epoxy resin modified by maleic anhydride. The side reaction which produces cross-linked molecular will be significantly enhanced with increasing temperature,concentration of catalyst and raw material. When solvent ratio of methylbenzene and acetone is relative low,acid value is hard to monitor and side reaction with cross-lined products is enhanced, which is not conducive to the reaction. In further reaction with sodium hydrogen,structure of product is examined through elemental analysis to monitor,and particle size distribution of the according modified epoxy emulsion is monitored by Size Distribution Modal Analysis. Particle size of self-emulsifier aqueous dispersion system prepared under optimal conditions is about 100nm,which also shows great stability.

Key words: bisphenol a epoxy resin, modification, maleic anhydride, sodium hydrogen sulfite

CLC Number:

TB332

LI Peng, ZHANG Xue-mei, CHENG Bin, YANG Xiao-ping. MODIFICATION OF EPOXY RESIN WITH MALEIC ANHYDRIDE AND SODIUM HYDROGEN SULFITE[J]. COMPOSITES SCIENCE AND ENGINEERING, 2013, 0(2): 17-21.

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