Patents Assigned to Whitford Corporation
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Publication number: 20200216669Abstract: The present disclosure provides a hybrid coating composition including a siloxane-based polymer and an organic polymer. The composition can be applied to a wide variety of substrates include metals, ceramic materials, plastics, composites, minerals and the like. A process for making articles is also provided.Type: ApplicationFiled: December 6, 2019Publication date: July 9, 2020Applicant: Whitford CorporationInventors: Matteo Sperindio, Scott C. Lake, Riccardo Piras, Michael J. Lindstrom
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Patent number: 10544306Abstract: The present disclosure provides a hybrid coating composition including a siloxane-based polymer and an organic polymer. The composition can be applied to a wide variety of substrates include metals, ceramic materials, plastics, composites, minerals and the like. A process for making articles is also provided.Type: GrantFiled: May 11, 2015Date of Patent: January 28, 2020Assignee: Whitford CorporationInventors: Matteo Sperindio, Scott C. Lake, Riccardo Piras, Michael J. Lindstrom
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Publication number: 20180187029Abstract: The present disclosure provides a composition for forming a coating including at least one dry lubricant material, at least one binder resin, and at least one ?-alkoxypropionamide solvent. The composition can be applied to a wide variety of rigid and flexible substrates. A process for making articles is also provided.Type: ApplicationFiled: July 7, 2016Publication date: July 5, 2018Applicant: WHITFORD CORPORATIONInventors: Matteo Sperindio, Paolo Luvié, Leonard W. Harvey
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Patent number: 9790358Abstract: Blended fluoropolymer compositions are provided. In one embodiment, a liquid dispersion of a first fluoropolymer is blended with a liquid dispersion of a second fluoropolymer. The first fluoropolymer may be polytetrafluoroethylene (PTFE), such as a low molecular weight PTFE (LPTFE) that has been polymerized via a dispersion or emulsion polymerization process, and which has not been agglomerated, irradiated, or thermally degraded. The LPTFE may be in the form of an aqueous dispersion, having a mean particle size of less than 1.0 microns (?m), with the LPTFE having a first melt temperature (Tm) of 332° C. or less. The second fluoropolymer may be a melt processable fluoropolymer (MPF), such as fluorinated ethylene propylene (FEP), in the form of an aqueous dispersion, and having a mean particle size of less than 1.0 microns (?m).Type: GrantFiled: April 20, 2015Date of Patent: October 17, 2017Assignee: Whitford CorporationInventors: Leonard W. Harvey, Michael Coates, Julie K. Wright
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Patent number: 9090778Abstract: Blended fluoropolymer compositions that, in one exemplary application, may be applied as a coating to a flexible substrate and, optionally, to a flexible substrate that has been previously coated with a primer or basecoat and/or a midcoat. In one embodiment, the composition is a blend of at least one low molecular weight polytetrafluoroethyelene (LPTFE) and at least one melt-processible fluoropolymer (MPF). In another embodiment, the composition includes a fluoropolymer base component including at least one fluoropolymer such as high molecular weight polytetrafluoroethylene (HPTFE), and additionally includes the LPTFE/MPF blended fluoropolymer composition. After being applied to the flexible substrate, optionally over a primer or basecoat and/or midcoat, and then cured, the present compositions form coatings that demonstrate improved abrasion resistance and/or improved release characteristics and/or increased translucency/transparency and/or improved impermeability.Type: GrantFiled: January 23, 2013Date of Patent: July 28, 2015Assignee: Whitford CorporationInventors: Leonard W. Harvey, Helen L. Brain
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Patent number: 9074084Abstract: Blended fluoropolymer compositions are provided, in which a liquid dispersion of a first fluoropolymer is blended with a liquid dispersion of a second fluoropolymer. The first fluoropolymer may be polytetrafluoroethylene (PTFE), such as a low molecular weight PTFE (LPTFE) in the form of an aqueous dispersion having a mean particle size of less than 1.0 microns (?m) and a first melt temperature (Tm) of 332° C. or less. The second fluoropolymer may be a melt processable fluoropolymer (MPF), such as methylfluoroalkoxy (MFA), fluorinated ethylene propylene (FEP), or perfluoroalkoxy (PFA), for example, in the form of an aqueous dispersion having a mean particle size of less than 1.0 microns (?m). When the blended fluoropolymer composition is dried, a crystal structure representing a true alloy of the fluoropolymers is formed, having melt characteristics that differ from those of the individual fluoropolymers.Type: GrantFiled: November 15, 2011Date of Patent: July 7, 2015Assignee: Whitford CorporationInventors: Leonard W. Harvey, Michael Coates, Julie K. Wright
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Patent number: 9051461Abstract: Fluoropolymer compositions that include multiple fluoropolymer components and, in exemplary applications, may be applied as coatings to either rigid or flexible substrates. The compositions may themselves be applied as basecoats or overcoats, or may be combined with other components to formulate basecoats or overcoats. In one embodiment, the compositions include at least one low molecular weight polytetrafluoroethylene (LPTFE) and at least two chemically different melt processible fluoropolymers (MPF). In another embodiment, the compositions include at least one high molecular weight polytetrafluoroethylene (HPTFE), at least one low molecular weight polytetrafluoroethylene (LPTFE), and at least two chemically different melt processible fluoropolymers (MPF).Type: GrantFiled: December 8, 2010Date of Patent: June 9, 2015Assignee: Whitford CorporationInventors: Leonard W. Harvey, Helen L. Brain, Thomas J. Bate, Anita K. Peacock, Susan J. Roberts-Bleming
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Publication number: 20140205757Abstract: Blended fluoropolymer compositions are provided. In one embodiment, a liquid dispersion of a first fluoropolymer is blended with a liquid dispersion of a second fluoropolymer. The first fluoropolymer may be polytetrafluoroethylene (PTFE), such as a low molecular weight PTFE (LPTFE) that has been polymerized via a dispersion or emulsion polymerization process, and which has not been agglomerated, irradiated, or thermally degraded. The LPTFE may be in the form of an aqueous dispersion, having a mean particle size of less than 1.0 microns (?m), with the LPTFE having a first melt temperature (Tm) of 332° C. or less. The second fluoropolymer may be a melt processible fluoropolymer (MPF), such as perfluoromethylvinvyl ether (MFA), fluorinated ethylene propylene (FEP), or perfluoropropylvinvyl ether (PFA), for example, in the form of an aqueous dispersion, and having a mean particle size of less than 1.0 microns (?m).Type: ApplicationFiled: March 24, 2014Publication date: July 24, 2014Applicant: WHITFORD CORPORATIONInventors: Leonard W. Harvey, Michael Coates, Julie K. Wright
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Patent number: 8691344Abstract: Blended fluoropolymer compositions are provided. In one embodiment, a liquid dispersion of a first fluoropolymer is blended with a liquid dispersion of a second fluoropolymer. The first fluoropolymer may be polytetrafluoroethylene (PTFE), such as a low molecular weight PTFE (LPTFE) that has been polymerized via a dispersion or emulsion polymerization process, and which has not been agglomerated, irradiated, or thermally degraded. The LPTFE may be in the form of an aqueous dispersion, having a mean particle size of less than 1.0 microns (?m), with the LPTFE having a first melt temperature (Tm) of 332° C. or less. The second fluoropolymer may be a melt processible fluoropolymer (MPF), such as methylfluoroalkoxy (MFA), fluorinated ethylene propylene (FEP), or perfluoroalkoxy (PFA), for example, in the form of an aqueous dispersion, and having a mean particle size of less than 1.0 microns (?m).Type: GrantFiled: May 19, 2009Date of Patent: April 8, 2014Assignee: Whitford CorporationInventors: Leonard W. Harvey, Michael Coates, Julie K. Wright
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Patent number: 8586677Abstract: Blended fluoropolymer compositions that, in one exemplary application, may be applied as a coating to a substrate and, optionally, may be applied to a substrate that has been previously coated with a primer or basecoat and/or a midcoat. In one embodiment, the composition is a blend of at least one high molecular weight trace modified polytetrafluoroethyelene (TMHPTFE) and at least one melt-processible fluoropolymer (MPF). After being applied to the substrate, optionally over a primer or basecoat and/or midcoat, and then cured, the present compositions form coatings that demonstrate improved abrasion resistance and/or improved release characteristics and/or increased translucency/transparency and/or improved impermeability. The present compositions may also be used to produce films having a high degree of clarity and impermeability. The present compositions in powder form may be melt or paste extruded to form articles with improved impermeability.Type: GrantFiled: April 11, 2011Date of Patent: November 19, 2013Assignee: Whitford CorporationInventors: Leonard W. Harvey, Helen L. Brain, Susan J. Roberts-Bleming, Lawrence D. Leech, Thomas J. Bate
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Publication number: 20130137812Abstract: Blended fluoropolymer compositions that, in one exemplary application, may be applied as a coating to a flexible substrate and, optionally, to a flexible substrate that has been previously coated with a primer or basecoat and/or a midcoat. In one embodiment, the composition is a blend of at least one low molecular weight polytetrafluoroethyelene (LPTFE) and at least one melt-processible fluoropolymer (MPF). In another embodiment, the composition includes a fluoropolymer base component including at least one fluoropolymer such as high molecular weight polytetrafluoroethylene (HPTFE), and additionally includes the LPTFE/MPF blended fluoropolymer composition. After being applied to the flexible substrate, optionally over a primer or basecoat and/or midcoat, and then cured, the present compositions form coatings that demonstrate improved abrasion resistance and/or improved release characteristics and/or increased translucency/transparency and/or improved impermeability.Type: ApplicationFiled: January 23, 2013Publication date: May 30, 2013Applicant: WHITFORD CORPORATIONInventor: Whitford Corporation
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Patent number: 8404309Abstract: Blended fluoropolymer compositions that may be applied as a coating to a flexible substrate. The compositions include at least one high molecular weight polytetrafluoroethylene (HPTFE), at least one a low molecular weight polytetrafluoroethylene (LPTFE) and at least one melt processible fluoropolymer (MPF). After being applied to the flexible substrate, optionally over a primer or basecoat and/or midcoat and then cured, the compositions form coatings that demonstrate improvement in one or more of abrasion resistance, release characteristics, translucency/transparency, and impermeability.Type: GrantFiled: September 25, 2009Date of Patent: March 26, 2013Assignee: Whitford CorporationInventors: Leonard W. Harvey, Helen L. Brain
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Publication number: 20130022740Abstract: Blended fluoropolymer compositions that, in one exemplary application, may be applied as a coating to a substrate and, optionally, may be applied to a substrate that has been previously coated with a primer or basecoat and/or a midcoat. In one embodiment, the composition is a blend of at least one high molecular weight trace modified polytetrafluoroethyelene (TMHPTFE) and at least one melt-processible fluoropolymer (MPF). After being applied to the substrate, optionally over a primer or basecoat and/or midcoat, and then cured, the present compositions form coatings that demonstrate improved abrasion resistance and/or improved release characteristics and/or increased translucency/transparency and/or improved impermeability. The present compositions may also be used to produce films having a high degree of clarity and impermeability. The present compositions in powder form may be melt or paste extruded to form articles with improved impermeability.Type: ApplicationFiled: April 11, 2011Publication date: January 24, 2013Applicant: WHITFORD CORPORATIONInventors: Leonard W. Harvey, Helen L. Brain, Susan J. Roberts-Bleming, Lawrence D. Leech, Thomas J. Bate
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Patent number: 8349434Abstract: A fluoropolymer coating composition that may be applied over a primer and/or at least one midcoat in a non-stick coating system. The coating composition may be prepared and applied in the form of a liquid dispersion, and includes at least one fluoropolymer base component, such as polytetrafluoroethylene (PTFE) and, in particular, at least one high molecular weight PTFE (HPTFE). The coating composition additionally includes a blended fluoropolymer composition. The blended fluoropolymer composition is a blend of at least one low molecular weight PTFE (LPTFE) and at least one melt-processible fluoropolymer. After application directly to a substrate or over an underlying coating, the coating demonstrates improved abrasion and scratch resistance, as well as improved release characteristics, as compared to known coatings that include only HPTFE or HPTFE with a small amount of melt processible fluoropolymer.Type: GrantFiled: March 2, 2012Date of Patent: January 8, 2013Assignee: Whitford Corporation, Inc.Inventors: Leonard W. Harvey, Lawrence D. Leech
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Patent number: 8227548Abstract: A fluoropolymer coating composition that may be applied over a primer and/or at least one midcoat in a non-stick coating system. The coating composition may be prepared and applied in the form of a liquid dispersion, and includes at least one fluoropolymer base component, such as polytetrafluoroethylene (PTFE) and, in particular, at least one high molecular weight PTFE (HPTFE). The coating composition additionally includes a blended fluoropolymer composition. The blended fluoropolymer composition is a blend of at least one low molecular weight PTFE (LPTFE) and at least one melt-processible fluoropolymer. After application directly to a substrate or over an underlying coating, the coating demonstrates improved abrasion and scratch resistance, as well as improved release characteristics, as compared to known coatings that include only HPTFE or HPTFE with a small amount of melt processible fluoropolymer.Type: GrantFiled: September 25, 2009Date of Patent: July 24, 2012Assignee: Whitford CorporationInventors: Leonard W. Harvey, Lawrence D. Leech
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Publication number: 20120165458Abstract: A fluoropolymer coating composition that may be applied over a primer and/or at least one midcoat in a non-stick coating system. The coating composition may be prepared and applied in the form of a liquid dispersion, and includes at least one fluoropolymer base component, such as polytetrafluoroethylene (PTFE) and, in particular, at least one high molecular weight PTFE (HPTFE). The coating composition additionally includes a blended fluoropolymer composition. The blended fluoropolymer composition is a blend of at least one low molecular weight PTFE (LPTFE) and at least one melt-processible fluoropolymer. After application directly to a substrate or over an underlying coating, the coating demonstrates improved abrasion and scratch resistance, as well as improved release characteristics, as compared to known coatings that include only HPTFE or HPTFE with a small amount of melt processible fluoropolymer.Type: ApplicationFiled: March 2, 2012Publication date: June 28, 2012Applicant: WHITFORD CORPORATIONInventors: Leonard W. Harvey, Lawrence D. Leech
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Publication number: 20120149268Abstract: The treatment of textile articles, such as sleeves made of mineral fibers of the type that are used with automotive exhaust system components, by impregnating the textile articles with treatment compositions of various formulations including fluoropolymers and/or mixtures of fluoropolymers with co-resins, followed by heat treatment to cure the compositions, thereby providing protection against impact damage to the sleeve. The treatment serves to impart enhanced resistance to damage of the sleeve by holding the overall fibrous structure of the sleeve together during impact such as by stone impingement, even if underlying fibers themselves are broken or damaged.Type: ApplicationFiled: August 27, 2010Publication date: June 14, 2012Applicant: Whitford CorporationInventors: Scott C. Lake, Leonard W. Harvey, Michael J. Lindstrom
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Publication number: 20120107602Abstract: A method of treating an article made of a fluoropolymer such as PTFE and, in particular, expanded PTFE (ePTFE), to provide a hydrophilic surface characteristic to the article. A filler is dispersed in a solvent and combined with PTFE to form a paste, which is extruded to form a shaped article and then expanded to form a porous ePTFE article, such as a tubular filter, for example, that includes filler particles dispersed and embedded within the bulk ePTFE. Functional groups of at least some of the filler particles are exposed at the surfaces or within the pores of the ePTFE article, which serve as reaction sites for a hydrophilic treatment by which hydrophilic molecules are chemically bound to the filler particles to thereby provide the surface and/or pores of the ePTFE article with a hydrophilic characteristic.Type: ApplicationFiled: October 24, 2011Publication date: May 3, 2012Applicant: WHITFORD CORPORATIONInventor: Daniel C. Chung
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Patent number: 8147915Abstract: A non-stick coating composition comprising a waterborne phenoxy resin, a crosslinker, a silicone compound, and a Fluoropolymer. An article, such as aluminum, may be coated with the composition. The composition may be multi-layers, but only the layers other than the first layer includes the silicone compound. The invention includes the method for applying the coating or coatings.Type: GrantFiled: April 30, 2009Date of Patent: April 3, 2012Assignee: Whitford CorporationInventors: Thomas James Bate, Arthur Wachowski
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Publication number: 20120076944Abstract: Blended fluoropolymer compositions are provided, in which a liquid dispersion of a first fluoropolymer is blended with a liquid dispersion of a second fluoropolymer. The first fluoropolymer may be polytetrafluoroethylene (PTFE), such as a low molecular weight PTFE (LPTFE) in the form of an aqueous dispersion having a mean particle size of less than 1.0 microns (?m) and a first melt temperature (Tm) of 332° C. or less. The second fluoropolymer may be a melt processible fluoropolymer (MPF), such as methylfluoroalkoxy (MFA), fluorinated ethylene propylene (FEP), or perfluoroalkoxy (PFA), for example, in the form of an aqueous dispersion having a mean particle size of less than 1.0 microns (?m). When the blended fluoropolymer composition is dried, a crystal structure representing a true alloy of the fluoropolymers is formed, having melt characteristics that differ from those of the individual fluoropolymers.Type: ApplicationFiled: November 15, 2011Publication date: March 29, 2012Applicant: WHITFORD CORPORATIONInventors: Leonard W. Harvey, Michael Coates, Julie K. Wright