PURPOSE: To obtain an aqueous epoxy resin dispersion improved in chemical, sterilization, low-temperature sterilization and water resistances by including a specified epoxy resin, a dispersant and a carboxyl-containing or -releasing curing agent.
CONSTITUTION: 50-95 wt.% epoxy compound having an epoxy equivalent of 100-2,000 and having at least two epoxy groups in the molecule, 5-50 wt.% aromatic polyol and 0.5-25 wt.% modifying compound having at least two epoxide-reactive groups are subjected to a condensation reaction to obtain an epoxy resin (A). Component A is mixed with a dispersant (B) having an epoxy equivalent of 5,000-400,000 g/mol and prepared by condensing an aliphatic polyol having a weight-average molecular weight of 200-2,000 with an epoxy compound having an epoxy equivalent of 100-2,000 and having at least two epoxy groups in an OH/epoxy equivalent ratio of 1:(0.8-3.5) and a carboxyl- containing or -releasing curing agent (C) having a carboxyl functionality of at least 3 in such amounts that the epoxy/carboxyl equivalent ratio is 1:0.5 or higher.
IERUGU PEETAA GAISURAA
PAURU OOBAARETSUSERU
DEIITAA DORAISHIYUHOTSUFU
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