The present disclosure is directed to an electrodepositable coating composition comprising (a) a hydroxyl-functional addition polymer comprising constitutional units, at least 70% of which comprise formula (I) wherein each R.sup.1 is independently one of hydrogen, an alkyl group, a substituted alkyl group, a cycloalkyl group, a substituted cycloalkyl group, an alkylcycloalkyl group, a substituted alkylcycloalkyl group, a cycloalkylalkyl group, a substituted cycloalkylalkyl group, an aryl group, a substituted aryl group, an alkylaryl group, a substituted alkylaryl group, a cycloalkylalkyl group, a substituted cycloalkylaryl group, an arylalkyl group, a substituted arylalkyl group, an arylcycloalkyl group, or a substituted arylcycloalkyl group, and the % based upon the total constitutional units of the hydroxyl-functional addition polymer; (b) an active hydrogen-containing, ionic salt group-containing film-forming polymer; (c) a curing agent; and (d) a curing catalyst.

The present invention provides a paint formulation comprising a binder dispersion and a hydrophobically modified alkali-swellable emulsion. The wet weight ratio of the binder dispersion to the hydrophobically modified alkali-swellable emulsion is from 1:3 to 1:10. The binder dispersion comprises by dry weight based on total dry weight of the binder dispersion, from 0.1% to 80% of polymer particles, and from 0.1% to 5% of a polysaccharide; and the hydrophobically modified alkali-swellable emulsion comprises by dry weight based on total dry weight of the hydrophobically modified alkali-swellable emulsion, from 30% to 50% of an ,-ethylenically unsaturated carboxylic acid monomer, and from 30% to 60% of an ,-ethylenically unsaturated nonionic monomer. The present invention further provides a process for preparing the paint formulation comprising mixing the binder dispersion with the hydrophobically modified alkali-swellable emulsion under stirring.

The present invention provides an epoxy resin that has excellent curability, when a low-activity catalyst is used or when used at low temperatures, that has excellent storage stability, and that yields a coating material having excellent coating film finish properties and corrosion resistance. The present invention further addresses an object of providing an amine-modified epoxy resin produced by reacting the epoxy resin with an amine compound, as well as providing a cationic electrodeposition coating material containing the amine-modified epoxy resin. The solution provided is a modified epoxy resin produced by reaction of at least the following (i) and (ii) and having an average polyfunctionalization degree (X1) per molecule of the modified epoxy resin of 0.10 or greater: (i) a compound (?) having one or more epoxy groups, (ii) a compound (?) having a functional group that is reactive with an epoxy group and that has a total functionality of the functional group of 3 or greater, and/or a compound (?) having a functional group that is reactive with an epoxy group and that has a total functionality of the functional group of 1 or 2, and the average polyfunctionalization degree (X1) per molecule of the modified epoxy resin being represented by Equation (1) below: Equation (1): Average Polyfunctionalization Degree (X1)=Number of Terminals Per Molecule of Modified Epoxy Resin?2

An intumescent coating composition comprising an epoxy resin binder, an epoxy reactive diluent, a curing agent and an acid catalyst, wherein the curing agent is comprised of a mixture of polyamide, polyetheramine and an amine functional monomer and wherein the acid catalyst is effective to forma phosphoric acid on thermal decomposition and wherein the coating composition has a viscosity of between 20,000 and 140,000 mPa/s at 20 C. and shear rate 1.5 s.sup.1. The invention also extends to a coated substrate, coated on at least a portion thereof with said intumescent coating composition.

The present invention is directed to a phosphated epoxy resin comprising at least one terminal group comprising a phosphorous atom covalently bonded to the resin by a carbon-phosphorous bond or by a phosphoester linkage; and at least one carbamate functional group. The present invention is also directed towards aqueous resinous dispersions comprising the phosphated epoxy resin, methods of coating a substrate, coated substrates, and methods of making a phosphated epoxy resin.

Disclosed are coating compositions, such as primer compositions, suitable for providing corrosion protection to metal substrates, as well as related coated articles and methods.