Study on Liquid Alkali Developing Type Solder Resists: Reaction of Dibasic Acid Half-ester with Epoxy Compound

摘要

Reaction of dibasic acid half-ester with epoxy compound, which is applied on the technology of liquid alkali developing type solder resists, was investigated in this paper. The half-esters of maleic acid, succinic acid, phthalic acid, cis-1,2,3,6-tetrahydrophthalic acid and cis-hexahydrophthalic acid were used as model compounds. N,N-dimethyl benzylamine, 1-methylimidazole, tetramethyl ammonium bromide and chromium acetylacetonate(CrAA) were used as catalysts. Kinetics behavior of the reaction has been researched. It is found that maleic acid monomethyl ester and Phthalic acid monomethyl ester show relatively high reactivity in most cases. Smaller molecular size is favorable for CrAA catalyzed reaction. Acidity and molecular size of dibasic acid half-ester are two factors that affects the reactivity of the half-ester.