Patents Assigned to McWhorter Technologies
-
Patent number: 6541595Abstract: The present invention relates to powder coating compositions which can be cured at low temperatures. The powder coating composition of the invention include a unique combination of a branched oligoester polyol and uretdione crosslinking agent which when cured results in a coating binder with desirable hardness, flexibility, solvent resistance, corrosion resistance, weatherability and gloss.Type: GrantFiled: May 29, 2001Date of Patent: April 1, 2003Assignee: McWhorter Technologies Inc.Inventors: Kamlesh Pai Panandiker, John Michael Bronk, Franklin Paul Spitler
-
Publication number: 20020091206Abstract: The present invention relates to powder coating compositions which can be cured at low temperatures. The powder coating composition of the invention include a unique combination of a branched oligoester polyol and uretdione crosslinking agent which when cured results in a coating binder with desirable hardness, flexibility, solvent resistance, corrosion resistance, weatherability and gloss.Type: ApplicationFiled: May 29, 2001Publication date: July 11, 2002Applicant: McWhorter Technologies, Inc.Inventors: Kamlesh Pai Panandiker, John Michael Bronk, Franklin Paul Spitler
-
Publication number: 20020028874Abstract: The present invention relates to stable aqueous polymer dispersions and a process for their preparation. The aqueous dispersions of the invention have less than about 5 weight percent organic solvent, at least about 30 weight percent solids, a mean particle size of not more than about 400 nm, and a viscosity of less than about 20.0 poise at about ambient temperature.Type: ApplicationFiled: April 5, 2001Publication date: March 7, 2002Applicant: McWhorter Technologies, Inc.Inventors: Joseph Leo Nothnagel, Michael Davis Coad, Minsbo He, Jean Elizabeth Marie Fletcher
-
Patent number: 6306956Abstract: The present invention is directed to an aqueous dispersion of a polyester salt and polymeric vehicles which include the aqueous dispersions of a polyester salt. The polymeric vehicle is particularly effective for providing coating binders in cured primer coatings. The primer coating compositions are useful for multilayer paint coating films which have at least two layers of paint film including the cured primer coating composition film. The use of the primer polymeric vehicles of the present invention in conjunction with one or more additional overlaying top coating film layers provide a multiple layer coatings having improved adhesion and chip resistance.Type: GrantFiled: September 24, 1999Date of Patent: October 23, 2001Assignee: McWhorter Technologies, Inc.Inventors: Gary Eugene Spilman, Michael Charles Knight, Jr., Lisa Kay Kemp, Joseph Leo Nothnagel
-
Patent number: 6284845Abstract: The present invention is directed to a powdered coating composition which includes a carboxyl terminated polyester, epoxy compounds and an onium catalyst or &bgr;-hydroxyalkylamide which provide coatings with outstanding properties when cured at low temperature.Type: GrantFiled: September 16, 1999Date of Patent: September 4, 2001Assignee: McWhorter TechnologiesInventors: Kamlesh Pai Panandiker, Timothy Wiedow, Mark Hendrickson
-
Patent number: 6277953Abstract: The present invention relates to stable aqueous polymer dispersions and a process for their preparation. The aqueous dispersions of the invention have less than about 2 weight percent organic solvent, at least about 30 weight percent solids, a mean particle size of not more than about 300 nm, and a viscosity of less than about 20.0 poise at about ambient temperature.Type: GrantFiled: September 25, 1998Date of Patent: August 21, 2001Assignee: McWhorter Technologies, Inc.Inventors: Joseph Leo Nothnagel, Michael Davis Coad, Kevin Jude O'Callaghan, Carlos Alfredo Kienzie Sterzer
-
Patent number: 6255523Abstract: The present invention relates to powder coating compositions which can be cured at low temperatures. The powder coating composition of the invention include a unique combination of a branched oligoester polyol and uretdione crosslinking agent which when cured results in a coating binder with desirable hardness, flexibility, solvent resistance, corrosion resistance, weatherability and gloss.Type: GrantFiled: September 18, 1998Date of Patent: July 3, 2001Assignee: McWhorter Technologies, Inc.Inventors: Kamlesh Pai Panandiker, John Michael Bronk, Franklin Paul Spitler
-
Patent number: 6248843Abstract: The present invention relates to powder coating compositions which can be cured at low temperatures. The powder coating compositions of the invention include a unique combination of a branched oligoester polyol and triazole blocked isocyanate cross-linking agent which when cured results in a coating binder with desirable hardness, flexibility, solvent resistance, corrosion resistance, weatherability and gloss.Type: GrantFiled: September 18, 1998Date of Patent: June 19, 2001Assignee: McWhorter Technologies, Inc.Inventors: Kamlesh Pai Panandiker, John Michael Bronk, James Duncan Pont
-
Patent number: 6225402Abstract: The present invention is directed to stable aqueous dispersions of an acrylic modified chlorinated polyolefin and a process for their preparation. The aqueous dispersions of acrylic modified chlorinated polyolefin are effective for use as coatings on treated and untreated polyolefinic substrates.Type: GrantFiled: March 15, 1999Date of Patent: May 1, 2001Assignee: McWhorter Technologies, Inc.Inventors: Kevin Jude O'Callaghan, Wayne Taylor Riddick, Michael Davis Coad, Martin Joseph Will, II
-
Patent number: 6174947Abstract: The inventors provide herein polymeric vehicles effective for depositing a coating composition that is curable upon exposure to the atmosphere and which has a low content of a volatile organic component, a high content of nonvolatile materials, a low viscosity, and a short drying time determined under common atmospheric conditions. The polymeric vehicle of the invention contains a polyurethane obtained by combining a polyisocyanate and a polyol having pendant hydroxyl groups, a polyunsaturated resin, oil, and a drier component. The inventors also provide the coating compositions themselves. The compositions have sufficiently low viscosities as to be readily applied to a surface, and which dry to hardness in less than 4.5 hrs.Type: GrantFiled: July 27, 1998Date of Patent: January 16, 2001Assignee: McWhorter TechnologiesInventors: Robert R. Harris, Andrea L. Bander
-
Patent number: 5637654Abstract: The present invention is directed to a powdered coating composition which includes a carboxyl terminated polyester, epoxy compounds and an onium catalyst which provide coatings with outstanding properties when cured at low temperatures.Type: GrantFiled: August 12, 1996Date of Patent: June 10, 1997Assignee: McWhorter TechnologiesInventors: Kamlesh P. Panandiker, Timothy Wiedow
-
Patent number: 5424365Abstract: An ambient curing coating composition made from at least two packages wherein one package contains a copolymer having acetoacetoxy groups and glycidyl groups plus an aluminum catalyst and the other package contains a copolymer having carboxylic acid groups plus a strong organic base catalyst.Type: GrantFiled: March 16, 1994Date of Patent: June 13, 1995Assignee: McWhorter Technologies, Inc.Inventors: Jim D. Elmore, Donald E. Babcock, William J. DeGooyer