Patents by Inventor David A. Flosser
David A. Flosser 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: 10899873Abstract: An epoxy oligomerization catalyst can be employed to prepare an epoxy resin employing a method including admixing a first epoxy resin having a first epoxy equivalent weight of from about 100 to about 600 with a diphenolic compound, and a catalyst, thereby forming a second epoxy resin having a second epoxy equivalent weight of from about 200 to about 10,000; wherein the catalyst is a guanidinium catalyst. The second equivalent weight is greater than the first equivalent weight.Type: GrantFiled: September 12, 2017Date of Patent: January 26, 2021Assignee: HEXION INC.Inventors: David Flosser, Jerry R. Hite, Larry Steven Corley, Bedri Erdem
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Publication number: 20190077906Abstract: An epoxy oligomerization catalyst can be employed to prepare an epoxy resin employing a method including admixing a first epoxy resin having a first epoxy equivalent weight of from about 100 to about 600 with a diphenolic compound, and a catalyst, thereby forming a second epoxy resin having a second epoxy equivalent weight of from about 200 to about 10,000; wherein the catalyst is a guanidinium catalyst. The second equivalent weight is greater than the first equivalent weight.Type: ApplicationFiled: September 12, 2017Publication date: March 14, 2019Inventors: David FLOSSER, Jerry R. HITE, Larry Steven CORLEY, Bedri ERDEM
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Patent number: 10119046Abstract: Compositions, methods, and coating composition using a curing agent are provided herein. In one embodiment, a curing agent for epoxy resins may be prepared using a formulation including: (a) an adduct of: (i) a diglycidyl ether of a bisphenol, and (ii) a first polyamine; (b) a second polyamine; and (c) water; wherein the composition has an amine hydrogen equivalent weight, based on solids, of less than or equal to 105.Type: GrantFiled: December 16, 2016Date of Patent: November 6, 2018Assignee: HEXION INC.Inventors: David Flosser, Patricia Garcia, Larry Steven Corley, Bedri Erdem, Lucy Phan
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Publication number: 20170137664Abstract: Compositions, methods, and coating composition using a curing agent are provided herein. In one embodiment, a curing agent for epoxy resins may be prepared using a formulation including: (a) an adduct of: (i) a diglycidyl ether of a bisphenol, and (ii) a first polyamine; (b) a second polyamine; and (c) water; wherein the composition has an amine hydrogen equivalent weight, based on solids, of less than or equal to 105.Type: ApplicationFiled: December 16, 2016Publication date: May 18, 2017Inventors: David Flosser, Patricia Garcia, Larry Steven Corley, Bedri Erdem, Lucy Phan
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Patent number: 9550912Abstract: Compositions, methods, and coating composition using a curing agent are provided herein. In one embodiment, a curing agent for epoxy resins may be prepared using a formulation including: (a) an adduct of: (i) a diglycidyl ether of a bisphenol, and (ii) a first polyamine; (b) a second polyamine; and (c) water; wherein the composition has an amine hydrogen equivalent weight, based on solids, of less than or equal to 105.Type: GrantFiled: December 19, 2014Date of Patent: January 24, 2017Assignee: HEXION INCInventors: David Flosser, Patricia Garcia, Larry Steven Corley, Bedri Erdem, Lucy Phan
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Patent number: 9416092Abstract: A transesterification process produces a (meth)acrylate ester product from a mixture comprising an alkyl(meth)acrylate reactant, an alcohol reactant, a catalyst, and a polymerization inhibitor. The mixture is subjected to reaction conditions sufficient to produce a product (meth)acrylate and a product alcohol, which are different than the reactants.Type: GrantFiled: February 11, 2013Date of Patent: August 16, 2016Assignee: Rohm and Haas CompanyInventors: David A. Flosser, Philippe P. Maillot, Nawal K. Sharma, Alejandro Ceron, Mingyu Ye
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Patent number: 9394224Abstract: A transesterification process produces a (meth)acrylate ester product from a mixture comprising an alkyl(meth)acrylate reactant, an alcohol reactant, a catalyst, and a polymerization inhibitor, wherein the water content in the reaction zone at the start of the transesterification step is from 0.2 to 1.1 weight percent, based on the weight of the materials in the reaction zone. The mixture is subjected to reaction conditions sufficient to produce a product (meth)acrylate and a product alcohol, which are different than the reactants.Type: GrantFiled: February 11, 2013Date of Patent: July 19, 2016Assignee: Rohm and Haas CompanyInventors: David A. Flosser, Philippe P. Maillot, Nawal K. Sharma, Alejandro Ceron, Mingyu Ye
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Publication number: 20160177125Abstract: Compositions, methods, and coating composition using a curing agent are provided herein. In one embodiment, a curing agent for epoxy resins may be prepared using a formulation including: (a) an adduct of: (i) a diglycidyl ether of a bisphenol, and (ii) a first polyamine; (b) a second polyamine; and (c) water; wherein the composition has an amine hydrogen equivalent weight, based on solids, of less than or equal to 105.Type: ApplicationFiled: December 19, 2014Publication date: June 23, 2016Inventors: David Flosser, Patricia Garcia, Larry Steven Corley, Bedri Erdem, Lucy Phan
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Patent number: 9067880Abstract: This invention provides a process for reducing biacetyl in alpha-, beta-unsaturated carboxylic acid esters, particularly in acrylic or methacrylic (hereinafter “(meth)acrylic”) esters, which comprise low levels of weak acid.Type: GrantFiled: October 13, 2011Date of Patent: June 30, 2015Inventors: Michael A. Curtis, David A. Flosser, Jamie J. Juliette, Philippe P. Maillot, Donna Williams
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Publication number: 20150045583Abstract: A transesterification process produces a (meth)acrylate ester product from a mixture comprising an alkyl(meth)acrylate reactant, an alcohol reactant, a catalyst, and a polymerization inhibitor. The mixture is subjected to reaction conditions sufficient to produce a product (meth)acrylate and a product alcohol, which are different than the reactants.Type: ApplicationFiled: February 11, 2013Publication date: February 12, 2015Applicant: ROHM AND HAAS COMPANYInventors: David A. Flosser, Philippe P. Maillot, Nawal K. Sharma, Alejandro Ceron, Mingyu Ye
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Publication number: 20150045578Abstract: A transesterification process produces a (meth)acrylate ester product from a mixture comprising an alkyl(meth)acrylate reactant, an alcohol reactant, a catalyst, and a polymerization inhibitor, wherein the water content in the reaction zone at the start of the transesterification step is from 0.2 to 1.1 weight percent, based on the weight of the materials in the reaction zone. The mixture is subjected to reaction conditions sufficient to produce a product (meth)acrylate and a product alcohol, which are different than the reactants.Type: ApplicationFiled: February 11, 2013Publication date: February 12, 2015Applicant: ROHM AND HAAS COMPANYInventors: David A. Flosser, Philippe P. Maillot, Nawal K. Sharma, Alejandro Ceron, Mingyu Ye
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Publication number: 20140200366Abstract: The present invention provides a method for reducing accumulation of solid materials when manufacturing a (meth)acrylic acid ester having low biacetyl content (less than 2 ppm) by adding an aromatic diamine under conditions which provide sufficient residence time and thorough mixing to react up to 100% by weight of the biacetyl in the crude (meth)acrylic acid ester stream, prior to separation and purification. A feedback method is also provided for reducing solids accumulation in the separation and purification equipment of such processes by measuring the biacetyl content and adjusting the aromatic diamine addition rate so that excess aromatic diamine can be minimized. A third embodiment provides a method for reversing an accumulation of solid materials during such processes, while still producing a (meth)acrylic acid ester having low biacetyl content (less than 2 ppm), by reducing or ceasing the addition rate of aromatic diamine for a period of time.Type: ApplicationFiled: June 1, 2012Publication date: July 17, 2014Applicant: ROHM AND HAAS COMPANYInventors: Michael A. Curtis, Michael S. Decourcy, David A. Flosser, Melissa Harris, Jamie J. Juliette, Philippe P. Maillot
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Publication number: 20130217914Abstract: This invention provides a process for reducing biacetyl in alpha-, beta-unsaturated carboxylic acid esters, particularly in acrylic or methacrylic (hereinafter “(meth)acrylic”) esters, which comprise low levels of weak acid.Type: ApplicationFiled: October 13, 2011Publication date: August 22, 2013Applicant: ROHM AND HAAS COMPANYInventors: Michael A. Curtis, David A. Flosser, Jamie J. Juliette, Philippe P. Maillot, Donna Williams