Patents Assigned to Lawter, Inc.
  • Polyamide resins for coating of sand or ceramic proppants used in hydraulic fracturing
    Patent number: 10611954
    Abstract: A proppant includes coating of a polyamide resin. The proppants may be used in subterranean well formations and hydraulic fracturing operations.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: April 7, 2020
    Assignee: LAWTER INC.
    Inventors: Eva Ramos, John Schneider
  • POLYAMIDE RESINS FOR COATING OF SAND OR CERAMIC PROPPANTS USED IN HYDRAULIC FRACTURING
    Publication number: 20180265771
    Abstract: A proppant includes coating of a polyamide resin. The proppants may be used in subterranean well formations and hydraulic fracturing operations.
    Type: Application
    Filed: January 5, 2016
    Publication date: September 20, 2018
    Applicant: Lawter, Inc.
    Inventors: Eva RAMOS, John SCHNEIDER
  • Tackifier dispersion
    Patent number: 9023929
    Abstract: The invention relates to a tackifier dispersion comprising a resinous material and an emulsifier, the emulsifier being obtainable by a method comprising providing an ester of one or more fatty acids containing at least two conjugated double bonds, reacting the ester with a dienophile containing an acid or anhydride group, to form an intermediate product A, and, reacting the intermediate product A with one or more polyalkylene glycols. The invention also relates to a method for the production of a tackifier dispersion, its use as a tackifier, and an adhesive composition comprising the tackifier dispersion. The invention further relates to an emulsifier, a method of producing the same and its use for emulsifying resinous materials.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: May 5, 2015
    Assignee: Lawter, Inc.
    Inventors: Patrick Peter Mario Aarts, Lodewijk Johannes Hubertus Houben, John Hazen
  • Waterbased dimerized rosins and the process to make them
    Patent number: 9012601
    Abstract: The present invention relates to a method to prepare dimerized rosins dispersible in water in presence of extremely low level of dimerization acid catalyst. The present invention relates also to its use as a tackifier resin, solid or in water, and ink resin, and an adhesive composition and ink composition comprising the rosin resin.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: April 21, 2015
    Assignee: Lawter, Inc.
    Inventors: John Hazen, Ivo Kesselaer
  • WATERBASED DIMERIZED ROSINS AND THE PROCESS TO MAKE THEM
    Publication number: 20130345390
    Abstract: The present invention relates to a method to prepare dimerized rosins dispersible in water in presence of extremely low level of dimerization acid catalyst. The present invention relates also to its use as a tackifier resin, solid or in water, and ink resin, and an adhesive composition and ink composition comprising the rosin resin.
    Type: Application
    Filed: August 23, 2013
    Publication date: December 26, 2013
    Applicant: Lawter, Inc.
    Inventors: John Hazen, Ivo Kesselaer
  • Waterbased dimerized rosins and the process to make them
    Patent number: 8557954
    Abstract: The present invention relates to a method to prepare dimerized rosins dispersible in water in presence of extremely low level of dimerization acid catalyst. The present invention relates also to its use as a tackifier resin, solid or in water, and ink resin, and an adhesive composition and ink composition comprising the rosin resin.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: October 15, 2013
    Assignee: Lawter, Inc.
    Inventors: John Hazen, Ivo Kesselaer