Robert E Nahas, 80194 Levinberg Ln, Wayne, NJ 07470

2004013, Jul 15, 2004

Jul 23, 2003

10/625329

Daniel Demarco - Wilmington DE, US
Basil Gregorovich - Wilmington DE, US
Robert Nahas - Voorhees NJ, US
Shi Zhang - Wilmington DE, US

C23F013/00

205/740000, 205/724000, 205/731000, 205/735000, 204/196110, 204/196220, 204/196260, 204/196370

This invention pertains to the protection of metals from corrosion and/or fouling from exposure to environments such as, for example, seawater. The protection in accordance with this invention is achieved through the use of conductive zinc-containing coatings in combination with applied current cathodic protection.

2011031, Dec 29, 2011

Jan 4, 2010

13/144103

Shi Hua Zhang - Wilmington DE, US
Lorenzo Fred Pelosi - Wilmington DE, US
Robert C. Nahas - Voorhees NJ, US

E.I. DU PONT DE NEMOURS AND COMPANY - Wilmington DE

G01N 27/28

204404

The present invention is directed to a corrosion resistance evaluator suitable for corrosion testing coated metals substrates, such as autobodies. A corrosion resistance evaluator provided with a chamber containing electrolyte to which anode and cathode coated with protective coating being tested are exposed. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages for preset durations that are interspaced with recovery periods. The impedance date collected is then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).

2012009, Apr 19, 2012

Jan 4, 2010

13/143819

Shi Hua Zhang - Wilmington DE, US
Lorenzo Fred Pelosi - Wilmington DE, US
Robert C. Nahas - Voorhees NJ, US

E.I.DuPont De Nemours and Company - Wilmington DE

G06F 19/00

702 30

The present invention is directed to a process for corrosion resistance evaluation of coated metals substrates, such as autobodies. An anode and cathode coated with protective coating being tested are exposed to an electrolyte in a chamber of a corrosion resistance evaluator. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages for preset durations that are interspaced with recovery periods. The impedance data collected are then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).

2012030, Nov 29, 2012

May 22, 2012

13/477450

ROBERT C NAHAS - Voorhees NJ, US
Andrew P Stamegna - Wilmington DE, US

E I DU PONT DE NEMOURS AND COMPANY - Wilmington DE

C09D 151/06
C09D 133/16

524504, 524544

The present disclosure relates to a coating composition comprising a fluoropolymer, especially a fluorine containing graft copolymer. A dried and cured layer of the coating composition can provide a substrate with an easy to clean surface having a high water contact angle and good recoat adhesion.

2013032, Dec 5, 2013

Dec 21, 2011

13/996576

Shi Hua Zhang - Wilmington DE, US
Lorenzo Fred Pelosi - Wilmington DE, US
Robert C. Nahas - Voorhees NJ, US

US COATINGS IP CO. LLC - Wilmington DE

G01N 27/02

702 30

The present invention is directed to a process for evaluating corrosion resistance of coated metals substrates, such as autobodies at accelerated rate. An anode and cathode coated with protective coating being tested are exposed to an electrolyte in a chamber of a corrosion resistance evaluator. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages modulated in a stepwise manner for preset durations that are interspaced with recovery periods. The impedance data collected are then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).

4659799, Apr 21, 1987

Dec 3, 1985

6/804134

Robert C. Nahas - Voorhees NJ
Clifford H. Strolle - Springfield PA

E. I. Du Pont de Nemours and Company - Wilmington DE

C08G 1862
C08G 1818
C08G 1879

528 73

A coating composition that can be cured with a vaporous amine catalyst, cured by baking at elevated temperatures or can be cured at ambient temperatures which has as the binder A. an acrylic polymer containing hydroxyl groups and amine containing groups and has a weight average molecular weight of about 2,000-50,000 and B. an aliphatic polyisocyanate.

4713265, Dec 15, 1987

Nov 17, 1986

6/931078

Robert C. Nahas - Voorhees NJ
Clifford H. Strolle - Springfield PA

E. I. Du Pont de Nemours and Company - Wilmington DE

B05D 304

427341

A process for curing a coating composition with a vaporous amine catalyst, wherein the composition has as the binder A. an acrylic polymer containing hydroxyl groups and amine containing groups and has a weight average molecular weight of about 2,000-50,000 and B. an aliphatic polyisocyanate.

2021033, Oct 28, 2021

Jul 31, 2019

17/264419

- Wilmington, DE
Anja Lothert - Philadelphia PA, US
Gaurang Bhargava - Philadelphia PA, US
Martin Wendt - Philadelphia PA, US
Robert Nahas - Philadelphia PA, US
Iain Harvey - Hatfield PA, US

AXALTA COATING SYSTEMS IP CO., LLC - Wilmington DE

C09D 129/14
C09D 7/61
C09D 5/12

A coating composition includes a (A) binder component and a (B) pigment component. The (A) binder component includes (A1) polyvinyl butyrate, (A2) a particular film forming resin, (A3) an acid, (A4) an optional functionalized tri-alkoxy silane, and (A5) an optional polymeric phosphate ester. The (B) pigment component includes (B1) a calcium ion-exchanged silica, (B2) a corrosion inhibiting pigment, and (B3), a polyalkylene oxide phosphate. The coating composition is formed by combining the aforementioned components. In a method, the coating composition is applied to a substrate.