Patents by Inventor Zachary D. Stockdale

Zachary D. Stockdale 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).

  • Salts of pyrophosphonic acid as flame retardants
    Patent number: 10035896
    Abstract: Flame retardant polymer compositions comprising certain thermally stable salts of pyrophosphonic acid as flame retardant materials, which flame retardant materials comprise one or more than one metals, are prepared and have excellent flame retardant activity.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: July 31, 2018
    Assignee: LANXESS SOLUTIONS US INC.
    Inventors: Zachary D. Stockdale, Matthew S. Burge
  • Halogen free high temperature polyamide compositions comprising phosphorus containing flame retardants
    Patent number: 9765204
    Abstract: Flame retardants produced by heating certain phosphonic acid salts at temperatures over 200° C. are readily compounded into high temperature polyamides that are processed at temperatures above 270° C. to provide flame retardant, high temperature polyamide compositions.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: September 19, 2017
    Assignee: LANXESS Solutions US Inc.
    Inventors: Larry D. Timberlake, Mark V. Hanson, Zachary D. Stockdale
  • Process stabilization of polymer compositions comprising phosphorous containing flame retardants
    Patent number: 9758640
    Abstract: Flame retardant polymer compositions comprising certain polymers, a flame retardant material obtained by heating certain phosphonic acid salts at temperatures over 200° C. and certain clays or metal compounds such as select metal borates, oxides, hydroxides, oxide hydroxides etc., are readily processed at elevated temperatures and under high stress conditions whereas similar compositions without the clays or metal compounds of the invention are prone to decomposition. For example, polyamide compositions comprising the flame retardant material obtained by heating certain phosphonic acid salts at temperatures over 200° C., hydrotalcite clays, and/or borates, oxides, hydroxides, oxide hydroxides of zinc or calcium, are highly stable to thermal processing under strenuous conditions such as high temperature extrusion.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: September 12, 2017
    Assignee: LANXESS Solutions US Inc.
    Inventors: Zachary D Stockdale, Larry D Timberlake, Mark V Hanson, William R Fielding
  • Flame retardant polymer compositions comprising heat treated phosphorus compounds and melam
    Patent number: 9752009
    Abstract: Flame retardant polymer compositions with excellent processing stability and flame retardant activity are obtained by incorporating into the polymer a flame retardant obtained by heating certain phosphonic acid salts at temperatures of 200° C. or higher and as flame retardant synergist melam or a melam derivative, which compositions are more readily processed under certain harsh conditions than similar compositions comprising similar synergists such as melem, melon and the like.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: September 5, 2017
    Assignee: LANXESS Solutions US Inc.
    Inventors: Zachary D Stockdale, Larry D Timberlake, Mark V Hanson
  • Phosphorus containing flame retardants
    Patent number: 9745449
    Abstract: Certain phosphonic acid salts heated at temperatures over 200° C. generate thermally stable, highly efficient flame retardant materials well suited for use as flame retardant additives in polymers. The flame retardants of the invention can be used as the sole flame retardant in a composition or in combination with other flame retardants, synergists or adjuvants.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: August 29, 2017
    Assignee: LANXESS Solutions US Inc.
    Inventors: Zachary D. Stockdale, Mark V. Hanson, Larry D. Timberlake, Subramaniam Narayan, William R. Fielding
  • Flame Retardant Polymer Compositions Comprising Heat Treated Phosphorus Compounds and Melam
    Publication number: 20160215122
    Abstract: Flame retardant polymer compositions with excellent processing stability and flame retardant activity are obtained by incorporating into the polymer a flame retardant obtained by heating certain phosphonic acid salts at temperatures of 200° C. or higher and as flame retardant synergist melam or a melam derivative, which compositions are more readily processed under certain harsh conditions than similar compositions comprising similar synergists such as melem, melon and the like.
    Type: Application
    Filed: June 30, 2015
    Publication date: July 28, 2016
    Inventors: Zachary D. Stockdale, Larry D. Timberlake, Mark V. Hanson
  • PROCESS STABILIZATION OF POLYMER COMPOSITIONS COMPRISING PHOSPHOROUS CONTAINING FLAME RETARDANTS
    Publication number: 20160200897
    Abstract: Flame retardant polymer compositions comprising certain polymers, a flame retardant material obtained by heating certain phosphonic acid salts at temperatures over 200° C. and certain clays or metal compounds such as select metal borates, oxides, hydroxides, oxide hydroxides etc., are readily processed at elevated temperatures and under high stress conditions whereas similar compositions without the clays or metal compounds of the invention are prone to decomposition. For example, polyamide compositions comprising the flame retardant material obtained by heating certain phosphonic acid salts at temperatures over 200° C., hydrotalcite clays, and/or borates, oxides, hydroxides, oxide hydroxides of zinc or calcium, are highly stable to thermal processing under strenuous conditions such as high temperature extrusion.
    Type: Application
    Filed: May 20, 2015
    Publication date: July 14, 2016
    Inventors: Zachary D. Stockdale, Larry D. Timberlake, Mark V. Hanson, William R. Fielding
  • SALTS OF PYROPHOSPHONIC ACID AS FLAME RETARDANTS
    Publication number: 20160032076
    Abstract: Flame retardant polymer compositions comprising certain thermally stable salts of pyrophosphonic acid as flame retardant materials, which flame retardant materials comprise one or more than one metals, are prepared and have excellent flame retardant activity.
    Type: Application
    Filed: April 20, 2015
    Publication date: February 4, 2016
    Inventors: Zachary D. Stockdale, Matthew S. Burge
  • HALOGEN FREE HIGH TEMPERATURE POLYAMIDE COMPOSITIONS COMPRISING PHOSPHORUS CONTAINING FLAME RETARDANTS
    Publication number: 20150307690
    Abstract: Flame retardants produced by heating certain phosphonic acid salts at temperatures over 200° C. are readily compounded into high temperature polyamides that are processed at temperatures above 270° C. to provide flame retardant, high temperature polyamide compositions.
    Type: Application
    Filed: July 7, 2015
    Publication date: October 29, 2015
    Inventors: Larry D. Timberlake, Mark V. Hanson, Zachary D. Stockdale
  • Phosphorus Containing Flame Retardants
    Publication number: 20150031805
    Abstract: Certain phosphonic acid salts heated at temperatures over 200° C. generate thermally stable, highly efficient flame retardant materials well suited for use as flame retardant additives in polymers. The flame retardants of the invention can be used as the sole flame retardant in a composition or in combination with other flame retardants, synergists or adjuvants.
    Type: Application
    Filed: July 22, 2014
    Publication date: January 29, 2015
    Applicant: CHEMTURA CORPORATION
    Inventors: Zachary D. Stockdale, Mark V. Hanson, Larry D. Timberlake, Subramaniam Narayan, William R. Fielding