Patents by Inventor Pamela K. Hernandez
Pamela K. Hernandez has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6228935Abstract: A method for polymerizing predominantly one or more acrylate and/or vinyl acetate monomers in the presence of a latex results in high solids dispersions of polymer particles with lower viscosities than traditionally observed. A significant wt. % of added monomers can be present in large particles, having nonspherical shapes. Some of the original latex particles are retained during the polymerization and these increase the solids content and lower the viscosity by packing in the interstices between large particles. The total polymer solids content can easily be varied from 70 to 92 or more wt. % which are higher than achieved in any previously reported aqueous polymerizations. The viscosities at very high solids contents become paste-like but the materials still are stable to storage and further handling without breaking the dispersion into an agglomerated polymer portion and released water. The dispersions are useful to form sealants, membranes, etc., either with or without other additives.Type: GrantFiled: November 30, 1999Date of Patent: May 8, 2001Assignee: Tremco IncorporatedInventors: James H. Dunaway, Pamela K. Hernandez, Gregory P. Bidinger
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Patent number: 6040380Abstract: A method for polymerizing predominantly one or more acrylate and/or vinyl acetate monomers in the presence of a latex results in high solids dispersions of polymer particles with lower viscosities than traditionally observed. A significant wt. % of added monomers can be present in large particles, having nonspherical shapes. Some of the original latex particles are retained during the polymerization and these increase the solids content and lower the viscosity by packing in the interstices between large particles. The total polymer solids content can easily be varied from 70 to 92 or more wt. % which are higher than achieved in any previously reported aqueous polymerizations. The viscosities at very high solids contents become paste-like but the materials still are stable to storage and further handling without breaking the dispersion into an agglomerated polymer portion and released water. The dispersions are useful to form sealants, membranes, etc., either with or without other additives.Type: GrantFiled: August 29, 1997Date of Patent: March 21, 2000Assignee: Tremco IncorporatedInventors: James H. Dunaway, Pamela K. Hernandez, Gregory P. Bidinger
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Patent number: 5744544Abstract: A method for polymerizing at least one unsaturated monomer in the presence of a latex results in a high solids dispersion of polymer particles with lower viscosities than traditionally observed. A significant wt. % of the polymer from added monomers can be present in large particles, having nonspherical shapes. Some of the original latex particles are retained during the polymerization and these increase the solids content and lower the viscosity by packing in the interstices between large particles. The total polymer solids content can easily be varied from 70 to 92 or more wt. %. The viscosities at very high solids contents become paste-like but the materials still are stable to storage and further handling without causing the dispersion to separate into an agglomerated polymer portion and released water. The dispersions are useful to form sealants, membranes, etc., either with or without other additives.Type: GrantFiled: July 26, 1996Date of Patent: April 28, 1998Assignee: The B.F.Goodrich CompanyInventors: James H. Dunaway, Pamela K. Hernandez, Gregory P. Bidinger, Biing-Lin Lee
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Patent number: 5541253Abstract: A method for polymerizing predominantly one or more acrylate and/or vinyl acetate monomers in the presence of a latex results in high solids dispersions of polymer particles with lower viscosities than traditionally observed. A significant wt. % of added monomers can be present in large particles, having nonspherical shapes. Some of the original latex particles are retained during the polymerization and these increase the solids content and lower the viscosity by packing in the interstices between large particles. The total polymer solids content can easily be varied from 70 to 92 or more wt. % which are higher than achieved in any previously reported aqueous polymerizations. The viscosities at very high solids contents become paste-like but the materials still are stable to storage and further handling without breaking the dispersion into an agglomerated polymer portion and released water. The dispersions are useful to form sealants, membranes, etc., either with or without other additives.Type: GrantFiled: October 11, 1994Date of Patent: July 30, 1996Assignee: The B. F. Goodrich CompanyInventors: James H. Dunaway, Pamela K. Hernandez, Gregory P. Bidinger
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Patent number: 5243009Abstract: Silicone-polycarbonate block copolymers are provided resulting from the reaction of certain siloxy aromatic imide siloxanes or hydroxyaromatic ester siloxanes which are made by effecting reaction between an organosiloxane having terminal aromatic anhydride groups or aromatic haloacyl groups which are each attached to silicon by silicon arylene linkages with an appropriate bishydroxyarylene compounds or hydroxyarylene amino compound. The aforementioned hydroxyaromatic imide siloxanes or hydroxyaromatic ester siloxanes are then phosgenated with a dihydric phenol or an aromatic bischloroformate. The silicone-polycarbonate block copolymers have been found to be flame retardant and useful as dielectric films and membranes, and as flame retardants in aromatic polycarbonates.Type: GrantFiled: March 16, 1992Date of Patent: September 7, 1993Assignee: General Electric CompanyInventors: Jonathan D. Rich, Philip J. McDermott, Gary C. Davis, Peter P. Policastro, Karen A. Regh, Pamela K. Hernandez, Thomas L. Guggenheim
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Patent number: 5077360Abstract: The present invention is directed to a one part, sealant composition preferably comprising a free isocyanate functionalized polyacrylate. The unblocked isocyanate is surprisingly stable even in the presence of a blocked amine curing agent. Upon exposure to ambient conditions, the blocked amine will react with ambient humidity to provide an amine which in turn will react with the polyacrylate isocyanate, thereby curing the sealant and providing exceptional sealant properties. The most preferred blocked amine curative is a ketimine.Type: GrantFiled: March 20, 1991Date of Patent: December 31, 1991Assignee: Tremco Inc.Inventors: Michael F. DePompei, Pamela K. Hernandez
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Patent number: 4945148Abstract: Silicone-polycarbonate block copolymers are provided resulting from the reaction of certain siloxy aromatic imide siloxanes or hydroxyaromatic ester siloxanes which are made by effecting reaction between an organosiloxane having terminal aromatic anhydride groups or aromatic haloacyl groups which are each attached to silicon by silicon arylene linkages with an appropriate bishydroxyarylene compounds or hydroxyarylene amino compound. The aforementioned hydroxyaromatic imide siloxanes or hydroxyaromatic ester siloxanes are then phosgenated with a dihydric phenol or an aromatic bischloroformate. The silicone-polycarbonate block copolymers have been found to be flame retardant and useful as dielectric films and membranes, and as flame retardants in aromatic polycarbonates.Type: GrantFiled: March 6, 1989Date of Patent: July 31, 1990Assignee: General Electric CompanyInventors: Jonathan D. Rich, Philip J. McDermott, Gary C. Davis, Peter P. Policastro, Karen A. Regh, Pamela K. Hernandez, Thomas L. Guggenheim
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Patent number: 4945147Abstract: There is provided by the present invention aromatic polyester-siloxane block copolymers which can be made by effecting the condensation between tetramethyldisiloxane bisbenzoic acid or acid chloride with a dihydric phenol such as bisphenol A or in combination with a mixture of such tetramethyldisiloxane bisbenzoic acid and aromatic acids, such as terephthalic acid or isophthalic acid. The aromatic polyester-siloxane block copolymers can be used as molding compounds, extruded films, in making composite matrix materials and as flame retardants for aromatic polycarbonates.Type: GrantFiled: March 6, 1989Date of Patent: July 31, 1990Assignee: General Electric CompanyInventors: Peter P. Policastro, Pamela K. Hernandez, Sandra A. Swint, Gary C. Davis, Jonathan D. Rich, Philip J. McDermott, Thomas L. Guggenheim
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Patent number: 4916194Abstract: Flame retardant aromatic polycarbonate compositions are provided resulting from the use of certain poly(arylene silicon) materials in combination with aromatic polycarbonates. Included among the poly(arylene silicon) materials are aromatic polyester silioxanes, aromatic polyimide siloxanes and aromatic polysilphenylenes.Type: GrantFiled: March 6, 1989Date of Patent: April 10, 1990Assignee: General Electric CompanyInventors: Peter P. Policastro, Pamela K. Hernandez, Gary C. Davis, Jonathan D. Rich
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Patent number: 4826916Abstract: Polyimidesiloxane coating compositions resulting from the intercondensation in the presence of methylanisole of various dianhydrides such as 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]-propane dianhydride or bis(phthalicanhydride)tetramethyldisiloxane, or mixtures thereof with organic diamine such as toluenediamine, aminoalkyl terminated polydimethylsiloxane or oxydianiline.Type: GrantFiled: February 27, 1987Date of Patent: May 2, 1989Assignee: General Electric CompanyInventors: Peter P. Policastro, Pamela K. Hernandez, Jonathan D. Rich
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Patent number: 4820781Abstract: Polyetherimide-silicone copolymer blends are provided having improved resistance to water absorption and a T.sub.g of at least 190.degree. C.Type: GrantFiled: February 22, 1988Date of Patent: April 11, 1989Assignee: General Electric CompanyInventors: Peter P. Policastro, Pamela K. Hernandez, Mark W. Davis
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Patent number: 4795680Abstract: Polyimide-siloxanes are provided resulting from the intercondensation of organic diamines with organosiloxanes having terminal silyl-substituted aromatic organic anhydride groups. Semiconductor devices and composites using such polyimidesiloxanes as dielectric or passivating layers, films, adhesives and composites are also provided.Type: GrantFiled: February 5, 1987Date of Patent: January 3, 1989Assignee: General Electric CompanyInventors: Jonathan D. Rich, Peter P. Policastro, Pamela K. Hernandez