Water-soluble or water-dispersible resinous salts, their preparation, and their use in coatings

Abstract From the Canadian patent

Water-soluble or water-dispersible resinous salts of the formula (I), are prepared by 'tipping' an epoxy resin with a phenol then carrying, out a Mannich reaction with an aldehyde (usually formaldehyde) and an aminosulphonic or aminophosphonic acid followed by salt formation on, the free acid groups preferably using an aliphatic amino alcohol e.g. 2-dimethylaminopropan-1-ol. Such salts may be crosslinked by heating in the presence of an aminoplast, a phenol-formaldehyde resin or a blocked polyisocyanate or when the salts contain free methylol groups by heating alone. They, can be used for preparing coating compositions.