Poor water resistance of the film
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Select a good water resistance resin and curing agent
The resin dispersion with good water resistance has the following indicators
» Higher hydroxyl value;
» Try to have a low acid value;
» Higher glass transition temperature (less alcohol with soft chain)
» Higher molecular weight, narrower molecular weight distribution;
» Minimal polar monomers;
» Monomers with urea cyclic amines that enhance wet adhesion;
» Suitable salt forming auxiliaries.
