Patents by Inventor Bryan Christopher McDonald

Bryan Christopher McDonald 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).

  • Method of making N-[2-aminoethyl] aminoalkylalkoxysilanes with ethyenediamine salt recycle
    Patent number: 6452033
    Abstract: A method of preparing 3-[N-(2-aminoethyl)]aminoalkylalkoxysilanes in which ethylenediamine, ethylenediamine hydrochloride salt, and a suitable &ohgr;-chloroalkylalkoxysilane are fed to a reactor at a feed ratio of 3-40 moles total ethylenediamine per mole of chloroalkylalkoxysilane under reaction conditions to produce a such aminoalkylalkoxysilane. The proportions of ethylenediamine and ethylenediamine hydrochloride salt are controlled such that a phase containing the diamine salt is present in said reactor separate from a phase containing the aminoalkylalkoxysilane. Following said reaction, the salt phase is separated from the silane phase for recycle to the two phase reactor.
    Type: Grant
    Filed: February 11, 2002
    Date of Patent: September 17, 2002
    Assignee: Dow Corning Corporation
    Inventors: William C. Maki, Howard Bank, Steven H. Waier, Bryan Christopher McDonald