Patents by Inventor Frederick Herbert Walker
Frederick Herbert Walker 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: 9334409Abstract: The present invention provides Mannich base derivatives of N,N?-dimethyl secondary diamine polymers including Mannich base derivatives of methylamine-terminated poly-(N-methylazetidine) and Mannich base derivatives of methylamine-terminated poly-(N-methylazacycloheptane). Amine curing agent compositions and amine-epoxy compositions containing Mannich base derivatives of N,N?-dimethyl secondary diamine polymers are also disclosed.Type: GrantFiled: April 30, 2014Date of Patent: May 10, 2016Assignee: Air Products and Chemicals, Inc.Inventors: Frederick Herbert Walker, Michael Ian Cook, Gamini Ananda Vedage, Robert Marjo Theodoor Rasing
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Publication number: 20140256853Abstract: The present invention provides Mannich base derivatives of N,N?-dimethyl secondary diamine polymers including Mannich base derivatives of methylamine-terminated poly-(N-methylazetidine) and Mannich base derivatives of methylamine-terminated poly-(N-methylazacycloheptane). Amine curing agent compositions and amine-epoxy compositions containing Mannich base derivatives of N,N?-dimethyl secondary diamine polymers are also disclosed.Type: ApplicationFiled: April 30, 2014Publication date: September 11, 2014Applicant: AIR PRODUCTS AND CHEMICALS, INC.Inventors: Frederick Herbert Walker, Michael Ian Cook, Gamini Ananda Vedage, Robert Marjo Theodoor Rasing
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Patent number: 8735512Abstract: The present invention provides Mannich base derivatives of N,N?-dimethyl secondary diamine polymers including Mannich base derivatives of methylamine-terminated poly-(N-methylazetidine) and Mannich base derivatives of methylamine-terminated poly-(N-methylazacycloheptane). Amine curing agent compositions and amine-epoxy compositions containing Mannich base derivatives of N,N?-dimethyl secondary diamine polymers are also disclosed.Type: GrantFiled: April 9, 2008Date of Patent: May 27, 2014Assignee: Air Products and Chemicals, Inc.Inventors: Frederick Herbert Walker, Michael Ian Cook, Gamini Ananda Vedage, Robert Marjo Theodoor Rasing
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Patent number: 8536284Abstract: The present invention provides N,N?-dimethyl secondary diamine polymers including methylamine-terminated poly-(N-methylazetidine) and methylamine-terminated poly-(N-methylazacycloheptane). Amine compositions and amine-epoxy compositions comprising N,N?-dimethyl secondary diamine polymers are also disclosed.Type: GrantFiled: January 19, 2010Date of Patent: September 17, 2013Assignee: Air Products & Chemicals, Inc.Inventors: Frederick Herbert Walker, Michael Ian Cook, Gamini Ananda Vedage, Robert Marjo Theodoor Rasing, Vipul P. Dholakia
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Patent number: 8512594Abstract: The present invention discloses both amine compositions and amine-epoxy compositions containing N,N?-dimethyl-meta-xylylenediamine. A novel process for producing amines such as N,N?-dimethyl-meta-xylylenediamine, and structurally similar amines, is also disclosed.Type: GrantFiled: August 25, 2008Date of Patent: August 20, 2013Assignee: Air Products and Chemicals, Inc.Inventors: Frederick Herbert Walker, Robert Marjo Theodoor Rasing, Gamini Ananda Vedage, Michael Ian Cook, Peter Andrew Lucas
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Publication number: 20100119838Abstract: The present invention provides N,N?-dimethyl secondary diamine polymers including methylamine-terminated poly-(N-methylazetidine) and methylamine-terminated poly-(N-methylazacycloheptane). Amine compositions and amine-epoxy compositions comprising N,N?-dimethyl secondary diamine polymers are also disclosed.Type: ApplicationFiled: January 19, 2010Publication date: May 13, 2010Applicant: Air Products and Chemicals, Inc.Inventors: Frederick Herbert Walker, Michael Ian Cook, Gamini Ananda Vedage, Robert Marjo Theodoor Rasing, Vipul P. Dholakia
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Publication number: 20100048827Abstract: The present invention discloses both amine compositions and amine-epoxy compositions containing N,N?-dimethyl-meta-xylylenediamine. A novel process for producing amines such as N,N?-dimethyl-meta-xylylenediamine, and structurally similar amines, is also disclosed.Type: ApplicationFiled: August 25, 2008Publication date: February 25, 2010Applicant: Air Products and Chemicals, Inc.Inventors: Frederick Herbert Walker, Robert Marjo Theodoor Rasing, Gamini Ananda Vedage, Michael Ian Cook, Peter Andrew Lucas
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Patent number: 7666954Abstract: The present invention provides N,N?-dimethyl secondary diamine polymers including methylamine-terminated poly-(N-methylazetidine) and methylamine-terminated poly-(N-methylazacycloheptane). Amine compositions and amine-epoxy compositions comprising N,N?-dimethyl secondary diamine polymers are also disclosed.Type: GrantFiled: October 20, 2006Date of Patent: February 23, 2010Assignee: Air Products and Chemicals, Inc.Inventors: Frederick Herbert Walker, Michael Ian Cook, Gamini Ananda Vedage, Robert Marjo Theodoor Rasing, Vipul P. Dholakia
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Publication number: 20090259003Abstract: The present invention provides Mannich base derivatives of N,N?-dimethyl secondary diamine polymers including Mannich base derivatives of methylamine-terminated poly-(N-methylazetidine) and Mannich base derivatives of methylamine-terminated poly-(N-methylazacycloheptane). Amine curing agent compositions and amine-epoxy compositions containing Mannich base derivatives of N,N?-dimethyl secondary diamine polymers are also disclosed.Type: ApplicationFiled: April 9, 2008Publication date: October 15, 2009Applicant: AIR PRODUCTS AND CHEMICALS, INC.Inventors: Frederick Herbert Walker, Michael Ian Cook, Gamini Ananda Vedage, Robert Marjo Theodoor Rasing
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Publication number: 20080194776Abstract: The present invention provides N,N?-dimethyl secondary diamine polymers including methylamine-terminated poly-(N-methylazetidine) and methylamine-terminated poly-(N-methylazacycloheptane). Amine compositions and amine-epoxy compositions comprising N,N?-dimethyl secondary diamine polymers are also disclosed.Type: ApplicationFiled: October 20, 2006Publication date: August 14, 2008Inventors: Frederick Herbert Walker, Michael lan Cook, Gamini Ananda Vedage, Robert Marjo Theodoor Rasing, Vipul P. Dholakia
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Patent number: 7112635Abstract: Non-gelled polymeric polyols are prepared by the acid catalyzed copolymerization of water, tetrahydrofuran and multifunctional epoxy resins. The polyols can be cured with OH reactive crosslinkers such as amino resins and polyisocyanates to yield thermosetting coatings with useful properties.Type: GrantFiled: March 12, 2004Date of Patent: September 26, 2006Assignee: Air Products and Chemicals, Inc.Inventor: Frederick Herbert Walker
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Patent number: 6800717Abstract: Non-gelled polymeric polyols are prepared by the acid catalyzed copolymerization of epoxy resins and water. When the starting resin is an epoxy resin derived from bisphenol-A, the resulting product has much lower levels of bisphenol-A and diglycidyl ether of bisphenol-A (DGEBA) compared to traditional epoxy resins of comparable molecular weight prepared by the advancement process. The product can be cured with OH reactive crosslinkers such as amino resins and polyisocyanates to yield thermosetting coatings with useful properties.Type: GrantFiled: January 31, 2002Date of Patent: October 5, 2004Assignee: Air Products and Chemicals, Inc.Inventors: Frederick Herbert Walker, John Bartram Dickenson
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Patent number: 6777088Abstract: A multilayer packaging material comprising (a) at least one layer of a gas-permeable material, and (b) at least one layer of a gas-barrier coating comprising a polymeric polyol made by copolymerizing a multifunctional epoxide resin and water in the presence of an amount of acid effective for polymerizing the epoxide resin and the water, the amount of water being sufficient to avoid gelation, the polymeric polyol optionally reacted with a crosslinking agent for hydroxyl functionality, especially an amino resin.Type: GrantFiled: April 1, 2002Date of Patent: August 17, 2004Assignee: Air Products and Chemicals, Inc.Inventors: Frederick Herbert Walker, Frank Ralph Pepe, John Bartram Dickenson
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Patent number: 6753386Abstract: The present invention relates to a film forming composition, a method of forming the composition, and application of the composition to coating formulations which provide a cured coating having acid rain resistance. A film-forming polyurethane polyol composition comprises a reaction product of an n-functional isocyanate (wherein n is a number ranging from about 2 to about 5) with at least one diol or triol or mixtures thereof and a compound containing isocyanate-reactive functional groups, preferably a monofunctional alcohol or thiol. The low viscosity polyurethane polyol of the present invention is typically crosslinked/cured using a melamine to produce a cured coating which is highly acid etch resistant as well as having other desirable physical-mechanical properties. The coating compositions have improved flow characteristics compared to compositions containing polyurethane polyols prepared without the monofunctional alcohols or thiols.Type: GrantFiled: December 16, 1997Date of Patent: June 22, 2004Assignee: Akzo Nobel N.V.Inventors: Alexander Leo Yahkind, Ian Wagstaff, Frederick Herbert Walker
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Publication number: 20030198815Abstract: A multilayer packaging material comprisingType: ApplicationFiled: April 1, 2002Publication date: October 23, 2003Inventors: Frederick Herbert Walker, Frank Ralph Pepe, John Bartram Dickenson
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Publication number: 20030032738Abstract: Non-gelled polymeric polyols are prepared by the acid catalyzed copolymerization of epoxy resins and water. When the starting resin is an epoxy resin derived from bisphenol-A, the resulting product has much lower levels of bisphenol-A and diglycidyl ether of bisphenol-A (DGEBA) compared to traditional epoxy resins of comparable molecular weight prepared by the advancement process. The product can be cured with OH reactive crosslinkers such as amino resins and polyisocyanates to yield thermosetting coatings with useful properties.Type: ApplicationFiled: January 31, 2002Publication date: February 13, 2003Inventors: Frederick Herbert Walker, John Bartram Dickenson
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Patent number: 6331583Abstract: Compositions of emulsified polymeric polyols, are prepared by a method comprising the acid catalyzed, non-reversible polymerization of lower molecular weight epoxy resins in an aqueous emulsified state. Coating compositions are prepared from the emulsified polymeric polyols crosslinked with various crosslinking agents.Type: GrantFiled: April 4, 2000Date of Patent: December 18, 2001Assignee: Air Products and Chemicals, Inc.Inventor: Frederick Herbert Walker
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Patent number: 6258920Abstract: Compositions of amine terminated polyamidoamine resins useful for curing epoxy resins are disclosed comprising combinations of fatty monocarboxylic acids, aromatic mono- and dicarboxylic acids, and polyethyleneamines, wherein the ratio of equivalents of fatty monocarboxylic acid to aromatic monocarboxylic acid can range from about 1:0.2 to about 1:1.5, the ratio of equivalents of monocarboxylic acids to aromatic dicarboxylic acid can range from about 1:0.1 to about 1:0.6, and the ratio of moles of total polyamine to equivalents of total acid can range from about 0.8:1 to about 1.3:1. Coating compositions comprising these polyamidoamine resins are also disclosed.Type: GrantFiled: January 27, 1999Date of Patent: July 10, 2001Assignee: Air Products and Chemicals, Inc.Inventors: William Edward Starner, David Alan Dubowik, Frederick Herbert Walker
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Patent number: 6008313Abstract: Compositions of amine terminated polyamide resins useful for curing epoxy resins are disclosed comprising combinations of fatty mono-acids, dimer acids, polyethyleneamines, and piperazine ring containing polyamines having an N--H functionality of 2 or 3 per mole selected from the group consisting of piperazine, or N-aminoalkylpiperazine, where the alkyl chain is a C2 to C6 alkyl chain, wherein the ratio of equivalents of fatty mono-acid to dimer acid can range from about 0.001:1 to about 1:1, the ratio of moles of piperazine ring containing polyamine to polyethylene amine can range from about 0.1:1 to about 1:1, and the ratio of moles of polyamine to equivalents of acid can range from about 0.6:1 to about 1.2:1. Coating compositions comprising these polyamide resins are also disclosed.Type: GrantFiled: November 19, 1997Date of Patent: December 28, 1999Assignee: Air Products and Chemicals, Inc.Inventors: Frederick Herbert Walker, William Edward Starner, Andrea Karen Smith
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Patent number: 5688905Abstract: An amine hardener composition for curing epoxy resin based coatings and related products comprising (A) from 5 to 75% of a diamine which possesses a vapor pressure less than about 133 Pascals at 20.degree. C., contains both a primary and a tertiary amine and corresponds to either of the structures: ##STR1## where R.sub.1 and R.sub.2 are independently C.sub.1 -C.sub.8 alkyl; X is --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --CH.sub.2 --, or --CH.sub.2 --O--CH.sub.2 --; and n is 2-6, (B) from 5 to 95% of a polyamide, amidoamine, Mannich base or cycloaliphatic amine curing agent; and (C) from 0 to 50% of other active hydrogen containing dismines or polyamines. Coatings based on the composition can be formulated at up to 100% solids, and have an excellent combination of pot life and dry speed.Type: GrantFiled: September 20, 1995Date of Patent: November 18, 1997Assignee: Air Products and Chemicals, Inc.Inventor: Frederick Herbert Walker