Patents by Inventor Patrick CREWDSON

Patrick CREWDSON 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).

  • Highly unsaturated multi-modal polyisoolefin composition and process for preparation thereof
    Patent number: 9982075
    Abstract: A polyisoolefin-based polymer composition having a multimodal molecular weight distribution and a level of unsaturation of greater than about 4 mol % is described, which can be prepared by co-polymerizing 70-96 vol % isoolefin monomer and 30-4 vol % ?-pinene or multi-olefin monomer, based on volume of isoolefin monomer and ?-pinene or multi-olefin monomer, in a solution comprising 0-30 vol % aliphatic hydrocarbon diluent, based on volume of the solution, and an alkylaluminum halide initiator system. The polyisoolefin-based polymer composition has a multimodal molecular weight distribution having a first molecular weight fraction having a peak molecular weight (Mp) of less than about 300 kg/mol, and a second molecular weight fraction having a peak molecular weight (Mp) of greater than about 1000 kg/mol or at least 3 times greater than the Mp of the first molecular weight fraction.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: May 29, 2018
    Assignee: ARLANXEO Singapore Pte. Ltd.
    Inventors: Lorenzo Ferrari, Sarah Chadder, Patrick Crewdson
  • HIGHLY UNSATURATED MULTI-MODAL POLYISOOLEFIN COMPOSITION AND PROCESS FOR PREPARATION THEREOF
    Publication number: 20170051088
    Abstract: A polyisoolefin-based polymer composition having a multimodal molecular weight distribution and a level of unsaturation of greater than about 4 mol % is described, which can be prepared by co-polymerizing 70-96 vol % isoolefin monomer and 30-4 vol % ?-pinene or multi-olefin monomer, based on volume of isoolefin monomer and ?-pinene or multi-olefin monomer, in a solution comprising 0-30 vol % aliphatic hydrocarbon diluent, based on volume of the solution, and an alkylaluminum halide initiator system. The polyisoolefin-based polymer composition has a multimodal molecular weight distribution having a first molecular weight fraction having a peak molecular weight (Mp) of less than about 300 kg/mol, and a second molecular weight fraction having a peak molecular weight (Mp) of greater than about 1000 kg/mol or at least 3 times greater than the Mp of the first molecular weight fraction.
    Type: Application
    Filed: April 28, 2015
    Publication date: February 23, 2017
    Inventors: Lorenzo FERRARI (deceased), Sarah CHADDER, Patrick CREWDSON