JOSE A RIVERA
Medical Practice in Philadelphia, PA

5114607, May 19, 1992

Aug 8, 1990

7/565287

Philip D. Deck - Ardsley PA
Jose B. Rivera - Philadelphia PA
William L. Harpel - Langhorne PA

Betz Laboratories, Inc. - Trevose PA

C11D 706, C11D 166

252156

A cleaning and etching solution and method for metal surface is disclosed which is an alkaline formulation which includes a surfactant combination of a low foaming ethylene oxide - propylene oxide block copolymer surfactant and a defoaming reverse ethylene oxide - propylene oxide block copolymer. The preferred cleaner includes an alkali metal hydroxide, an alkali metal salt of gluconic acid and preferably an alkali tripolyphosphate and the surfactant combination.

5905105, May 18, 1999

Sep 18, 1996

8/714303

Lawrence E. Jones - Reading PA
Jose B. Rivera - Philadelphia PA
Michael D. Wert - Laureldale PA

Bulk Chemicals, Inc. - Reading PA

C08K3/36;3/16

524413

A method and composition for treating metal surfaces to improve corrosion resistance and paint adhesion. The composition is a non-corrosive aqueous solution including water, a polymeric compound, an additive, and dispersed silica. In a preferred embodiment, the polymeric compound may be a polymer having a plurality of carboxylic functional groups and a plurality of hydroxyl groups. The polymeric compound may be a bifunctional copolymer or the reaction product of a first polymer having a plurality of carboxylic functional groups (e. g. , polyacrylic acid or polymethylvinylmaleic anhydride), and a second polymer having a plurality of hydroxyl groups (e. g. , polyvinyl alcohol). The additive is selected from at least one of: (i) an acid of a group IV-B element and a weak base, and (ii) an ammonium salt of a group IV-B compound such as ammonium zirconium carbonate. An exemplary acid of a group IV-B element is fluotitanic acid and an exemplary weak base is ammonium hydroxide. Dispersed silica is added, and any attack of the silica is minimized.

5516696, May 14, 1996

Sep 13, 1994

8/305195

Jose B. Rivera - Philadelphia PA

Bulk Chemicals, Inc. - Leesport PA

G01N 2176

436 56

A method and composition for indicating the presence of a chrome-free pretreatment for improving the paint adhesion and corrosion resistance of a metal surface. The presence of the pretreatment is indicated by adding a compound to the chrome-free pretreatment which causes the pretreatment to fluoresce under an ultraviolet light. The additive which causes the pretreatment to fluoresce under an ultraviolet light is an ultraviolet tracer, such as a stilbene or a coumarin derivative, and the method according to this invention includes exposing the coated metal to ultraviolet light.

5859107, Jan 12, 1999

Dec 20, 1996

8/774935

Lawrence E. Jones - Reading PA
Michael D. Wert - Laureldale PA
Jose B. Rivera - Philadelphia PA
Ted M. Schlosser - Tamaqua PA

Bulk Chemicals, Inc. - Reading PA

C09D12004, C08K 310, C08K 316

524406

A method and composition for coating a metal for use in connection with improving corrosion resistance and paint adhesion. The composition is a non-corrosive ester cross-linked polymer system having a plurality of carboxylic functional groups and a plurality of hydroxyl groups. The polymer system may be a bifunctional copolymer or the reaction product of a first polymer having a plurality of carboxylic functional groups (e. g. polyacrylic acid or polymethylvinylmaleic anhydride), and a second polymer having a plurality of hydroxyl groups (e. g. polyvinyl alcohol). The resulting reaction product of these two polymers is a cross-linked polymeric blend. A compound of a Group IV-B element may be added to this polymer blend to increase the degree of cross-linking and improve paint adhesion and corrosion resistance. Such a Group IV-B compound may be an acid such as fluozirconic acid, fluotitanic acid or fluchafnic acid, or a salt such as ammonium zirconium carbonate. The method for improving corrosion resistance and paint adhesion of a metal surface includes contacting the metal surface with a composition of the present invention and drying the composition in place.

2005008, Apr 21, 2005

Oct 21, 2003

10/690349

Jose Rivera - Philadelphia PA, US
Norman Schellenger - Lansdale PA, US

C08L001/00

427331000, 524522000, 524524000, 524262000

A method and composition for treating metal surfaces improves the paint adhesion of the metal surface, particularly its resistance to delamination of paint over a stressed area in the finished metal upon exposure to hot water. The composition is an aqueous composition of an organo-functional silane, a compound of a group IV-B element, and a polymer blend having a plurality of carboxylic functional groups and a plurality of hydroxyl groups. The method includes contacting a metal surface, such as aluminum, with the composition. The polymer blend is preferably a mixture of polymethylvinylether-co-maleic acid and polyvinyl alcohol. The organo-functional silane is preferably an epoxy silane.