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).

  • Transesterification process
    Patent number: 9416092
    Abstract: 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: Grant
    Filed: February 11, 2013
    Date of Patent: August 16, 2016
    Assignee: Rohm and Haas Company
    Inventors: David A. Flosser, Philippe P. Maillot, Nawal K. Sharma, Alejandro Ceron, Mingyu Ye
  • Transesterification process
    Patent number: 9394224
    Abstract: 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: Grant
    Filed: February 11, 2013
    Date of Patent: July 19, 2016
    Assignee: Rohm and Haas Company
    Inventors: David A. Flosser, Philippe P. Maillot, Nawal K. Sharma, Alejandro Ceron, Mingyu Ye
  • Process for producing methyl methacrylate having reduced biacetyl content
    Patent number: 9067880
    Abstract: 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: Grant
    Filed: October 13, 2011
    Date of Patent: June 30, 2015
    Inventors: Michael A. Curtis, David A. Flosser, Jamie J. Juliette, Philippe P. Maillot, Donna Williams
  • TRANSESTERIFICATION PROCESS
    Publication number: 20150045583
    Abstract: 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: Application
    Filed: February 11, 2013
    Publication date: February 12, 2015
    Applicant: ROHM AND HAAS COMPANY
    Inventors: David A. Flosser, Philippe P. Maillot, Nawal K. Sharma, Alejandro Ceron, Mingyu Ye
  • TRANSESTERIFICATION PROCESS
    Publication number: 20150045578
    Abstract: 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: Application
    Filed: February 11, 2013
    Publication date: February 12, 2015
    Applicant: ROHM AND HAAS COMPANY
    Inventors: David A. Flosser, Philippe P. Maillot, Nawal K. Sharma, Alejandro Ceron, Mingyu Ye
  • METHOD FOR REDUCING FOULING DURING PURIFICATION OF (METH)ACRYLATE ESTERS
    Publication number: 20140200366
    Abstract: 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: Application
    Filed: June 1, 2012
    Publication date: July 17, 2014
    Applicant: ROHM AND HAAS COMPANY
    Inventors: Michael A. Curtis, Michael S. Decourcy, David A. Flosser, Melissa Harris, Jamie J. Juliette, Philippe P. Maillot
  • PROCESS FOR PRODUCING METHYL METHACRYLATE HAVING REDUCED BIACETYL CONTENT
    Publication number: 20130217914
    Abstract: 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: Application
    Filed: October 13, 2011
    Publication date: August 22, 2013
    Applicant: ROHM AND HAAS COMPANY
    Inventors: Michael A. Curtis, David A. Flosser, Jamie J. Juliette, Philippe P. Maillot, Donna Williams