Patents by Inventor C. Michael Walkup

C. Michael Walkup 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).

  • Patent number: 7498371
    Abstract: A modified phenolic novolak resin is prepared by reacting a phenolic compound (e.g., resorcinol) with an aliphatic polyol. The reaction mixture further reacts with a formaldehyde to produce a modified phenolic novolak resin. The reaction is typically carried out in the presence of an acid or a base catalyst. The resulting resin is characterized by a relatively low level of free resorcinol; and rubber compounds containing the resin exhibit low fuming, lower Mooney viscosity (which means better processing), better dynamic stiffness properties (G?), and/or good tear properties. Therefore, the resulting resin can be used as a methylene acceptor compound in a vulcanizable rubber composition.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: March 3, 2009
    Inventors: Raj B. Durairaj, C. Michael Walkup, Mark A. Lawrence
  • Patent number: 7259221
    Abstract: A silane-modified phenolic resin is prepared by reacting a phenolic compound (e.g., resorcinol) with an aldehyde to produce a phenolic novolak resin. The phenolic novolak resin is further reacted with at least one silane compound to produce the silane-modified phenolic resin. The reaction is typically carried out in the presence of an acid or base catalyst. The resulting resin has a lower softening point and can be used as a methylene acceptor compound in a vulcanizable rubber composition.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: August 21, 2007
    Inventors: Raj B. Durairaj, C. Michael Walkup, Mark A. Lawrence
  • Patent number: 6875807
    Abstract: A silane-modified phenolic resin is prepared by reacting a phenolic compound (e.g., resorcinol) with an aldehyde to produce a phenolic novolak resin. The phenolic novolak resin is further reacted with at least one silane compound to produce the silane-modified phenolic resin. The reaction is typically carried out in the presence of an acid or base catalyst. The resulting resin has a lower softening point and can be used as a methylene acceptor compound in a vulcanizable rubber composition.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: April 5, 2005
    Assignee: Indspec Chemical Corporation
    Inventors: Raj B. Durairaj, C. Michael Walkup, Mark A. Lawrence
  • Patent number: 6828383
    Abstract: A vulcanizable rubber composition comprises (a) a rubber component; (b) a methylene donor compound; and (c) a methylene acceptor comprising a blend of a high ortho-ortho bonded phenolic novolak resin and a resorcinolic resin. The resin blend can be made by a number of methods. For example, it can be prepared by first reacting one or more phenolic compounds represented by the following formula: where R is selected from the group consisting of H, an alkyl group chain of 1-16 carbon atoms and an aralkyl group of 8-12 carbon atoms with an aldehyde in the presence of an ortho directing catalyst and then combining a resorcinol-formaldehyde novolak resin to obtain a phenolic and resorcinolic novolak resin blend.
    Type: Grant
    Filed: February 18, 2003
    Date of Patent: December 7, 2004
    Assignee: Occidental Petroleum
    Inventors: Raj B. Durairaj, C. Michael Walkup, Mark A. Lawrence
  • Publication number: 20040241331
    Abstract: A silane-modified phenolic resin is prepared by reacting a phenolic compound (e.g., resorcinol) with an aldehyde to produce a phenolic novolak resin. The phenolic novolak resin is further reacted with at least one silane compound to produce the silane-modified phenolic resin. The reaction is typically carried out in the presence of an acid or base catalyst. The resulting resin has a lower softening point and can be used as a methylene acceptor compound in a vulcanizable rubber composition.
    Type: Application
    Filed: May 28, 2003
    Publication date: December 2, 2004
    Applicant: INDSPEC Chemical Corporation
    Inventors: Raj B. Durairaj, C. Michael Walkup, Mark A. Lawrence
  • Publication number: 20040116592
    Abstract: A vulcanizable rubber composition comprises (a) a rubber component; (b) a methylene donor compound; and (c) a methylene acceptor comprising a blend of a high ortho-ortho bonded phenolic novolak resin and a resorcinolic resin. The resin blend can be made by a number of methods.
    Type: Application
    Filed: February 18, 2003
    Publication date: June 17, 2004
    Applicant: INDSPEC Chemical Corporation
    Inventors: Raj Durairaj, C. Michael Walkup, Mark A. Lawrence