Patents by Inventor Aaron van de Sande

Aaron van de Sande 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).

  • Acrylate monomer preparation using alkali metal alkoxides as ester interchange catalysts and bromide salt polymerization inhibitors
    Patent number: 6215018
    Abstract: The present invention relates to a process to prepare alkyl (meth)acrylate esters from corresponding alkyl/methacrylate esters using an alkali metal alkoxide as an ester interchange catalyst to produce an alkyl (meth)acrylate ester monomer product C The present invention further relates to the use of bromide and iodide salts as free radical polymerization inhibitors. The present invention further relates to the use of a noninterfering alcohol or polyol that prevents anionic polymerization reactions of reactant ester B and/or alkyl (meth)acrylate product C.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: April 10, 2001
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Timothy M. Miller, Narayanan Pondicherry, Louis E. Trapasso, Aaron van de Sande
  • Acrylate monomer preparation using alkali metal alkoxides as ester interchange catalysts and bromide salt polymerization inhibitors
    Patent number: 6008404
    Abstract: The present invention relates to a process to prepare alkyl (meth)acrylate esters from corresponding alkyl/methacrylate esters using an alkali metal alkoxide as an ester interchange catalyst to produce an alkyl (meth)acrylate ester monomer product C ##STR1## The present invention further relates to the use of bromide and iodide salts as free radical polymerization inhibitors. The present invention further relates to the use of a noninterfering alcohol or polyol that prevents anionic polymerization reactions of reactant ester B and/or alkyl (meth)acrylate product C. The present invention further relates to a process for inhibiting polymerization of (meth)acrylates being synthesized in a transesterification or ester-ester interchange reaction system.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: December 28, 1999
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Timothy M. Miller, Narayanan Pondicherry, Louis E. Trapasso, Aaron van de Sande