Patents by Inventor Howard A. Colvin

Howard A. Colvin 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: 10538600
    Abstract: A rubber composition including guayule rubber and 15 to 90 phr silica. The rubber can be cis-1,4 polyisoprene and include 15 to 90 phr silica and contain less than 20% of the proteins associated with Hevea rubber and further include at least a trace of resins present in other natural rubbers. The rubber can be cis-1,4 polyisoprene and further include between at least a trace and 3% by weight of resins present in guayule rubber. The rubber composition can further be comprised of a synthetic rubber and include between about 40-100 phr of guayule rubber, and silica. The silica can be hydrophobated.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: January 21, 2020
    Assignee: COOPER TIRE AND RUBBER COMPANY
    Inventor: Howard A. Colvin
  • Publication number: 20190127495
    Abstract: A process for forming an epoxidized rubber including dissolving a rubber in a solvent and epoxidizing the rubber in the presence of an epoxidation reagent. The solvent is selected such that the rubber is soluble therein but the epoxidized rubber precipitates.
    Type: Application
    Filed: April 4, 2017
    Publication date: May 2, 2019
    Inventors: Nicolas Sauty, Howard Colvin
  • Publication number: 20180265601
    Abstract: A rubber composition including guayule rubber and 15 to 90 phr silica. The rubber can be cis-1,4 polyisoprene and include 15 to 90 phr silica and contain less than 20% of the proteins associated with Hevea rubber and further include at least a trace of resins present in other natural rubbers. The rubber can be cis-1,4 polyisoprene and further include between at least a trace and 3% by weight of resins present in guayule rubber. The rubber composition can further be comprised of a synthetic rubber and include between about 40-100 phr of guayule rubber, and silica. The silica can be hydrophobated.
    Type: Application
    Filed: January 12, 2016
    Publication date: September 20, 2018
    Inventor: Howard A. Colvin
  • Publication number: 20180230243
    Abstract: A latex processing system and method involves mixing a latex and at least one solvent blend in an extruder, in order to remove resin found in the latex and to coagulate the latex to form a coagulum. The at least one solvent blend has a first solvent configured to coagulate the latex, and a second solvent configured to swell the resulting coagulum. In particular, a series of the solvent blends may be used at different locations along a length of the extruder, and may further include distinct blends of the first solvent and the second solvent, introduced at the different locations, and having different ratios of the first solvent and the second solvent.
    Type: Application
    Filed: February 13, 2018
    Publication date: August 16, 2018
    Inventors: Nicolas Sauty, Brittney Sunday, Howard Colvin
  • Publication number: 20180229552
    Abstract: A tire tread composition includes a quantity of an elastomer including guayule natural rubber, and a quantity of a hydrocarbon resin substantially evenly distributed throughout the elastomer. The elastomer of the tire tread composition may consist entirely of guayule natural rubber. The hydrocarbon resin may be selected to have a predetermined miscibility in the guayule natural rubber. The predetermined miscibility is measured by a deviation of actual Tg from predicted Tg for either the tire tread composition or an elastomer-resin mixture consistent with the elastomer and resin used in the tire tread composition. In particular, the predetermined miscibility in the guayule natural rubber is less than about six percent (6%) deviation in the actual Tg from the predicted Tg at a 20 phr loading.
    Type: Application
    Filed: February 13, 2018
    Publication date: August 16, 2018
    Inventors: Howard Colvin, Zachary Walters
  • Publication number: 20180229553
    Abstract: A tire tread composition includes a quantity of an elastomer and a quantity of a hydrocarbon resin substantially evenly distributed throughout the elastomer. The elastomer includes natural rubber. The hydrocarbon resin has a predetermined miscibility in the natural rubber. The predetermined miscibility is measured by a deviation of actual Tg for an elastomer-resin mixture consistent with the elastomer and hydrocarbon resin used in the tire tread composition from predicted Tg as calculated. In particular, the predetermined miscibility in the natural rubber is less than about six percent (6%) deviation in the actual Tg from the predicted Tg at a 20 phr loading.
    Type: Application
    Filed: February 13, 2018
    Publication date: August 16, 2018
    Inventors: Howard Colvin, Timothy Donley, Zachary Walters
  • Patent number: 10030124
    Abstract: A method for manufacturing a modified silica product includes admixing a mercapto silane and a silica to form a hydrophobated silica, and treating the hydrophobated silica with an oxidizing agent. Likewise, a method for manufacturing a silica masterbatch with the modified silica product includes the admixing a mercapto silane solution and a silica slurry to form a hydrophobated silica slurry, and then treating the hydrophobated silica slurry with an oxidizing agent to form a modified silica slurry. The modified silica slurry is blended with a rubber latex, which is then coagulated to form the silica masterbatch. Rubber formulations and articles manufactured with one of the modified silica product and the silica masterbatch are also disclosed.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: July 24, 2018
    Assignee: Cooper Tire & Rubber Company
    Inventors: Howard Colvin, Peter John Wallen
  • Publication number: 20170247477
    Abstract: A method for stabilizing a natural rubber such as guayule. The method includes the step of introducing at least one of an Extraction Curves for Guayule Rubber Samples amine and a phenolic anti-oxidant, such as MADA, to a latex form of the rubber under conditions such that the anti-oxidant becomes chemically bound to the rubber. The method includes the further step of subsequently treating the rubber to remove at least a substantial portion of entrained resins. The method can yield a rubber composition of, for example, guayule rubber and including an anti-oxidant chemically bound thereto. The resultant rubber can be suitable for use in tire construction.
    Type: Application
    Filed: September 10, 2015
    Publication date: August 31, 2017
    Inventors: Howard A. Colvin, Zachary D. Walters
  • Patent number: 9238729
    Abstract: A functionalized silica product includes particles of a hydrophobated silica having a coating of a polymer. A ratio of the hydrophobated silica to the polymer is from about 0.3/1 to about 100/1. The functionalized silica product may be in the form of a friable crumb or a powder, or in the form of a bale, that may be mixed into an elastomer formulation for a rubber article, such as a tire component.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: January 19, 2016
    Assignee: COOPER TIRE & RUBBER COMPANY
    Inventors: Peter John Wallen, Howard Colvin
  • Publication number: 20150376380
    Abstract: A method for manufacturing a modified silica product includes admixing a mercapto silane and a silica to form a hydrophobated silica, and treating the hydrophobated silica with an oxidizing agent. Likewise, a method for manufacturing a silica masterbatch with the modified silica product includes the admixing a mercapto silane solution and a silica slurry to form a hydrophobated silica slurry, and then treating the hydrophobated silica slurry with an oxidizing agent to form a modified silica slurry. The modified silica slurry is blended with a rubber latex, which is then coagulated to form the silica masterbatch. Rubber formulations and articles manufactured with one of the modified silica product and the silica masterbatch are also disclosed.
    Type: Application
    Filed: June 29, 2015
    Publication date: December 31, 2015
    Inventors: Howard Colvin, Peter John Wallen
  • Publication number: 20140350159
    Abstract: A functionalized silica product includes particles of a hydrophobated silica having a coating of a polymer. A ratio of the hydrophobated silica to the polymer is from about 0.3/1 to about 100/1. The functionalized silica product may be in the form of a friable crumb or a powder, or in the form of a bale, that may be mixed into an elastomer formulation for a rubber article, such as a tire component.
    Type: Application
    Filed: August 11, 2014
    Publication date: November 27, 2014
    Inventors: Peter John Wallen, Howard Colvin
  • Patent number: 8865799
    Abstract: The present invention provides a process for making silica-filled rubber masterbatch using silica hydrophobated with a trimethoxy silane coupling agent that is soluble in an alcohol-water solution containing at least about 70 wt % water. One embodiment uses a mixture of trimethoxy silanes, one or more of which react with rubber to bond the silica to the rubber, and one or more of which do not react with rubber, but do hydrophobate the silica. Hydrophobated silica is mixed with latex polymer and incorporated into rubber during coagulation of the latex, which is preferably coagulated with calcium chloride. The present invention further provides a process for making the trimethoxy silane coupling agents. Preferred trimethoxy silane coupling agents include bis-(3-trimethoxysilylpropyl)-disulfide and bis-(3-trimethoxysilylpropyl)-tetrasulfide.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: October 21, 2014
    Assignees: Industrias Negromex, S.A. de C.V., Cooper Tire & Rubber Company
    Inventors: Peter J. Wallen, Christopher J. Hardiman, Howard A. Colvin, Gregory C. Bowman, Jose Eduardo Rojas Reyna
  • Publication number: 20140083598
    Abstract: The present invention provides a process for making silica-filled rubber masterbatch using silica hydrophobated with a trimethoxy silane coupling agent that is soluble in an alcohol-water solution containing at least about 70 wt % water. One embodiment uses a mixture of trimethoxy silanes, one or more of which react with rubber to bond the silica to the rubber, and one or more of which do not react with rubber, but do hydrophobate the silica. Hydrophobated silica is mixed with latex polymer and incorporated into rubber during coagulation of the latex, which is preferably coagulated with calcium chloride. The present invention further provides a process for making the trimethoxy silane coupling agents. Preferred trimethoxy silane coupling agents include bis-(3-trimethoxysilylpropyl)-disulfide and bis-(3-trimethoxysilylpropyl)-tetrasulfide.
    Type: Application
    Filed: January 22, 2013
    Publication date: March 27, 2014
    Inventors: Peter J. Wallen, Christopher J. Hardiman, Howard A. Colvin, Gregory C. Bowman, Jose Eduardo Rojas Reyna
  • Publication number: 20130192746
    Abstract: The present invention provides a process for making silica-filled rubber masterbatch using silica hydrophobated with a trimethoxy silane coupling agent that is soluble in an alcohol-water solution containing at least about 70 wt % water. One embodiment uses a mixture of trimethoxy silanes, one or more of which react with rubber to bond the silica to the rubber, and one or more of which do not react with rubber, but do hydrophobate the silica. Hydrophobated silica is mixed with latex polymer and incorporated into rubber during coagulation of the latex, which is preferably coagulated with calcium chloride. The present invention further provides a process for making the trimethoxy silane coupling agents. Preferred trimethoxy silane coupling agents include bis-(3-trimethoxysilylpropyl)-disulfide and bis-(3-trimethoxysilylpropyl)-tetrasulfide.
    Type: Application
    Filed: January 22, 2013
    Publication date: August 1, 2013
    Inventors: Peter J. Wallen, Christopher J. Hardiman, Howard A. Colvin, Gregory C. Bowman, Jose Eduardo Rojas Reyna
  • Patent number: 8476342
    Abstract: A rubber composition has a base rubber, a filler which is a protein, including soy protein, derived from byproducts resulting from the manufacture of biodiesel fuel and a coupling agent.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: July 2, 2013
    Assignee: Cooper Tire & Rubber Company
    Inventors: Howard A. Colvin, Jeffery M. Opperman
  • Patent number: 8357733
    Abstract: The present invention provides a process for making silica-filled rubber masterbatch using silica hydrophobated with a trimethoxy silane coupling agent that is soluble in an alcohol-water solution containing at least about 70 wt % water. One embodiment uses a mixture of trimethoxy silanes, one or more of which react with rubber to bond the silica to the rubber, and one or more of which do not react with rubber, but do hydrophobate the silica. Hydrophobated silica is mixed with latex polymer and incorporated into rubber during coagulation of the latex, which is preferably coagulated with calcium chloride. The present invention further provides a process for making the trimethoxy silane coupling agents. Preferred trimethoxy silane coupling agents include bis-(3-trimethoxysilylpropyl)-disulfide and bis-(3-trimethoxysilylpropyl)-tetrasulfide.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: January 22, 2013
    Assignees: Industrias Negromex, S.A. de C.V., Cooper Tire & Rubber Company
    Inventors: Peter J. Wallen, Gregory C. Bowman, Howard A. Colvin, Christopher J. Hardiman, José Eduardo Rojas Reyna
  • Patent number: 8048919
    Abstract: This invention is based upon the unexpected discovery that ethyl lactate can be used as an emulsifying/dispersing excipient for numerous biologically active compounds without destroying the pharmacological activity of the active ingredient. Ethyl lactate proves to be an extremely effective agent for solubilizing biologically active compounds that are difficult to solubilize in conventional excipients. The operability of this invention is predicated on the necessity for the ethyl lactate to be essentially free of peroxide compounds. Such pharmaceutical grade ethyl lactate can be made by reducing the level of peroxide compounds in high purity ethyl lactate by hydrogenation, reduction with a non-catalytic chemical reducing agent, absorption into activated carbon or alumina, or distillation.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: November 1, 2011
    Assignee: Archer Daniels Midland Company
    Inventors: Joel Muse, Jr., Howard A. Colvin
  • Publication number: 20100022684
    Abstract: The present invention provides a process for making silica-filled rubber masterbatch using silica hydrophobated with a trimethoxy silane coupling agent that is soluble in an alcohol-water solution containing at least about 70 wt % water. One embodiment uses a mixture of trimethoxy silanes, one or more of which react with rubber to bond the silica to the rubber, and one or more of which do not react with rubber, but do hydrophobate the silica. Hydrophobated silica is mixed with latex polymer and incorporated into rubber during coagulation of the latex, which is preferably coagulated with calcium chloride. The present invention further provides a process for making the trimethoxy silane coupling agents. Preferred trimethoxy silane coupling agents include bis-(3-trimethoxysilylpropyl)-disulfide and bis-(3-trimethoxysilylpropyl)-tetrasulfide.
    Type: Application
    Filed: July 23, 2009
    Publication date: January 28, 2010
    Inventors: Peter J. Wallen, Gregory C. Bowman, Howard A. Colvin, Christopher J. Hardiman, José Eduardo Rojas Reyna
  • Publication number: 20080108733
    Abstract: A rubber composition has a base rubber, a filler which is a protein, including soy protein, derived from byproducts resulting from the manufacture of biodiesel fuel and a coupling agent.
    Type: Application
    Filed: October 24, 2007
    Publication date: May 8, 2008
    Inventors: Howard A. Colvin, Jeffery M. Opperman
  • Publication number: 20070272339
    Abstract: This invention is based upon the discovery that elongated silica has superior characteristics for reinforcing rubbery elastomers as compared to conventional silica. More specifically, elongated silica provides a higher level of reinforcement for elastomers at the same level of loading. Accordingly, elongated silica can be employed to attain an equivalent level of reinforcement at a lower level of loading. This results in lower weight compositions and potential cost savings. Rubber compounds that are reinforced with elongated silica offer significant advantages in tires including reduced rolling resistance, increased tread life, and, of course, reduced weight.
    Type: Application
    Filed: August 10, 2007
    Publication date: November 29, 2007
    Applicant: The Goodyear Tire & Rubber Company
    Inventors: Howard Colvin, Sun Chen