E.i. Dupont De Nemours and Company

Other

Joseph A Antonelli

Christopher Scopazzi

Duck Joo Yang

Tyau-Jeen Lin

Hirotsugu Yasuda

Charles T Berge

Michael J Darmon

Joseph E McLaughlin

Brian P Devlin

Clifford H Strolle

Lee A Becton

Robert John Barsotti

Isidor Hazan

Harry J Spinelli

Renee Jeanne Kelly

Melville J Camelon

Souheng Wu

Henry L Jakubauskas

Kerstin Stranimaier

William Bertus Vanderlinde

Lee Edwin Becton

Christopher E Murphy

Mark M Doherty

An aqueous coating composition comprising a dispersed graft copolymer characterized by macromonomers attached at a terminal end thereof to a polymeric backbone which is acid functional, wherein the functional groups have been neutralized. Such compositions provide improved properties for an automotive finish.

Aqueous branched polymer dispersion

An improved aqueous cathodic electrocoating composition of an aqueous carrier having dispersed therein a film forming binder of (1) an epoxy-resin amine adduct and (2) a blocked polyisocyanate crosslinking agent; wherein the improvement is an epoxy resin amine adduct which is a reaction product of an epoxy resin and a polyhydric phenol which is chain extended with a primary amine to form a chain extended epoxy resin having epoxy end groups and an equivalent amine to epoxy ratio is 1-10 to 4-10 and wherein the epoxy end groups of the resin are reacted with a ketimine and/or a diamine and the resulting chain extended epoxy resin has an epoxy equivalent weight of about 700-2,000 and is neutralized with an organic or inorganic acid; wherein the electrocoating composition has improved throw power and forms coatings that have improved corrosion resistance in comparison to conventional electrocoating compositions formed from epoxy resins extended with conventional diamines or polyols.

Cathodic electrocoating composition containing an epoxy resin chain

An improved method of free radical polymerization conducted in the presence of a relatively low molecular weight macromonomer such as can be made with a metal chelate chain transfer catalyst. This method has various uses, including reducing the molecular weight of a variety of crosslinkable polymers and copolymers.

Preparing crosslinkable polymers employing macromonomer chain transfer

A waterbased dispersion useful for forming aqueous coating compositions containing dispersed hydrophobic material, an aqueous carrier and a branched polymer dispersant (binder);

Aqueous branched polymer dispersant for hydrophobic materials

A waterbased dispersion useful for forming aqueous coating composition containing dispersed pigment, an aqueous carrier and a branched polymer dispersant (binder);

Pigment dispersions containing aqueous branched polymer dispersant

An improved aqueous cathodic electrocoating composition having a binder of an epoxy-amine adduct which is of an epoxy resin that has been reacted with an amine, and a blocked polyisocyanate crosslinking agent; wherein the improvement is the use of an alkane sulfonic acid as the neutralizing agent for the epoxy amine adduct to provide an electrocoating composition having improved throw power.

Cathodic electrocoating compositions containing methane sulfonic acid as

A graft copolymer dispersant (binder) having a weight average molecular weight of about 5,000-100,000 wherein: (1) the graft copolymer has a polymeric backbone formed by polymerizing ethylenically unsaturated monomers; (2) the graft copolymer has macromonomer side chains attached to the backbone at a single terminal point that have weight average molecular weights of about 1,000-30,000 and are formed from by polymerizing ethylenically unsaturated monomers in the presence of a cobalt chain transfer agent. The graft copolymer further contains about 2 to 70% by weight, based on the weight of the graft copolymer, of polymerized constituents having a phosphate moiety or phosphoric acid moleties that are polymerized into the backbone, the side chains, or both. The graft copolymer is neutralized with an inorganic base or an amine.

Stable aqueous metallic flake dispersion using phosphated acrylic

A pigment dispersion useful for forming aqueous coating compositions containing metallic flake pigment, an aqueous carrier and a graft copolymer dispersant (binder); wherein the graft copolymer has a weight average molecular weight of about 5,000-100,000 and comprises a polymeric backbone and macromonomer side chains attached to the backbone wherein

Dispersed polymers comprising microparticles stabilized with two kinds of steric stabilizers are disclosed. The first stabilizer is an essentially linear polymer having a terminal end attached to the microparticle. The second stabilizer is a graft or comb polymer comprising an acrylic backbone having side chains. This stabilizer, in contrast to the first stabilizer may be attached to the core by means of a plurality of functional groups placed along the backbone of the graft polymer.

Dual stabilized microparticles

A curable composition comprising a crosslinkable copolymer, wherein the copolymer is the free radical polymerization product of a mixture of monomers in the presence of a terminally unsaturated oligomeric chain transfer catalyst. Such compositions have advantageous properties when used in a variety of products including high performance coatings.

Curable composition comprising crosslinkable polymers prepared from

A method of preparing macromonomer compositions of a limited average molecular weight containing an olefinic polymerizable end group. The macromonomers may suitably comprise the polymerization product of methacrylate, methacrylonitrile, and methacrylamide monomers, derivatives thereof, and mixtures of such monomers.

Method of preparing macrmonomer compositions

A polymer dispersion of a star polymer dispersed in an organic liquid; wherein the star polymer has a crosslinked core having attached thereto at least three macrononomer arms; where

Star polymers made from macromonomers made by cobalt chain transfer

This invention relates to the use of low temperature plasma technology for significantly improved corrosion protection of metals. The plasma process involves pretreatment of the surface of the metal with a gas plasma to remove oxygen, followed by plasma deposition of a thin polymeric film on the treated surface, followed by cathodic electrocoat application of a primer.

Method of coating metal using low temperature plasma and

A polymer dispersion of a star polymer dispersed in an organic liquid; wherein the star polymer has a crosslinked core having attached thereto at least three macromonomer arms; where

A coating composition comprising a hydroxy functional graft copolymer characterized by macromoners attached at a terminal point to a polymeric backbone. The composition further comprises a polyisocyanate curing agent. Such compositions provide an improved balance of pot life and cure properties.

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Riverton, NJ, United States of America

Joseph A Antonelli