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US 4,064,090 AGranted
Aqueous coating composition of epoxy-amine adduct and an acid with cross-linker
AssigneeDulux Australia Ltd.
InventorsDavid Vincent Gibson, Bruce Leary
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Abstract
Aqueous coating compositions comprising ionizable salts of specific epoxy-amine adducts and acids of pK.sub.a value 1.5 - 6.0 are disclosed. The coatings are particularly useful in a cathodic electrodeposition process.
Claims7
An aqueous coating composition comprising a dispersion in water of an ionizable salt of an epoxy-amine adduct and an acid together with a cross-linking agent for the adduct, characterized in that the ionizable salt consists of the combination of an acid and an epoxy-amine adduct selected from the compounds of the formulae
- B.sub.1 -- A.sub.1 -- C.sub.1 -- A.sub.2 -- B.sub.2 (a)
- and
- B.sub.1 -- A.sub.1 -- C.sub.1 -- A.sub.2 -- C.sub.2 -- A.sub.3 -- B.sub.2 (b)
- A.sub.1 a.sub.2 and A.sub.3 are epoxy free residues of essentially straight-chain di-epoxides;
- B.sub.1 and B.sub.2 are residues of secondary mono-amines which have a pK.sub.b value of 4 maximum;
- C.sub.1 and C.sub.2 are residues of amines selected from the group consisting of methylamine, ethylamine, n-propylamine, iso-propylamine, n-butylamine, phenylamine, benzylamine, ortho-toluidine, metal-toluidine, para-toluidine, ethanolamine, ethylene diamine, hexamethylene diamine, n-propyldiamine, orthophenylene diamine, meta-phenylenediamine, para-phenylene diamine and triethylene tetramine.
3 more elements
Dependencies are inferred from the claim text.