ELECTRODEPOSITED COATINGS FOR USE ON ALUMINIUM SUBSTRATES Russian patent published in 2012 - IPC C08G59/18 C08G59/30 C08G59/50 C09D163/00 C09D5/08 C23C22/05 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of coating aluminium substrates through anionic electrodeposition of phosphated epoxy resin. The method of coating an aluminium substrate is realised by passing electric current between the substrate, which acts as the anode, and a cathode which is in electric contact with an electrodeposition bath containing an aqueous dispersion a base-neutralised resin composition containing a phosphated epoxy resin which does not form gel and which contains a mixture of a product of reaction of one or more polymer epoxy-compounds with phosphoric acid and with organophosphonic acid and/or organophosphinic acid, wherein the aqueous dispersion contains a curing agent. Also disclosed is an aqueous resin dispersion for coating a substrate, containig: (a) a base-neutralised resin composition containing a phosphated epoxy resin which does not form gel and which contains a mixture of a product of reaction of one or more polymer epoxy-compounds with phosphoric acid and with organophosphonic acid and/or organophosphinic acid, and (b) azole containing a sulphur atom.

EFFECT: coating exhibits low tendency to forming point holes.

14 cl, 2 ex