Patents by Inventor Thawesak PARAWAN

Thawesak PARAWAN 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).

  • Process for the preparation of polymerized polyethylene wax
    Patent number: 11485806
    Abstract: The present invention relates to a process for the preparation of a polyethylene wax, the process comprising the steps of providing a catalyst solution, wherein the catalyst solution comprises at least one activating compound, an alkylaluminoxane and a me-tallocene complex, wherein the molar ratio of the activating compound to aluminum comprised in the alkylaluminoxane is from 0.0005 to 0.20; and polymerizing ethylene, by contacting the ethylene and the catalyst solution.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: November 1, 2022
    Assignee: SCG Chemicals Co., Ltd.
    Inventors: Saovalak Sripothongnak, Thawesak Parawan, Nittiphat Nealmongkolrattana, Tossapol Khamnaen, Sumate Charoenchaidet
  • Unsymmetrical metallocene catalysts and uses thereof
    Patent number: 11053269
    Abstract: Unsymmetrical metallocene compounds based on cyclopentadienyl ligands are disclosed, as well as catalytic compositions comprising the compounds supported on solid support materials. The compounds and compositions are useful as catalysts in the polymerisation of olefins. In particular, the compounds and compositions are useful catalysts in the preparation of low molecular weight polyethylene (e.g. polyethylene wax) and copolymers formed from the polymerisation of ethylene and other ?-olefins.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: July 6, 2021
    Assignee: SCG CHEMICALS CO., LTD.
    Inventors: Dermot O'Hare, Jean-Charles Buffet, Jessica Lamb, Tossapol Khamnaen, Manutsavin Charernsuk, Thawesak Parawan, Sumate Charoenchaidet
  • PROCESS FOR THE PREPARATION OF POLYMERIZED POLYETHYLENE WAX
    Publication number: 20190263947
    Abstract: The present invention relates to a process for the preparation of a polyethylene wax, the process comprising the steps of providing a catalyst solution, wherein the catalyst solution comprises at least one activating compound, an alkylaluminoxane and a me-tallocene complex, wherein the molar ratio of the activating compound to aluminum comprised in the alkylaluminoxane is from 0.0005 to 0.20; and polymerizing ethylene, by contacting the ethylene and the catalyst solution.
    Type: Application
    Filed: November 6, 2017
    Publication date: August 29, 2019
    Applicant: SCG Chemicals Co., Ltd.
    Inventors: Saovalak SRIPOTHONGNAK, Thawesak PARAWAN, Nittiphat NEALMONGKOLRATTANA, Tossapol KHAMNAEN, Sumate CHAROENCHAIDET
  • CATALYTIC COMPOSITIONS
    Publication number: 20190135954
    Abstract: Catalytic compositions comprising constrained geometry compounds associated with solid polymethylaluminoxane are disclosed.
    Type: Application
    Filed: June 14, 2017
    Publication date: May 9, 2019
    Inventors: Dermot O'HARE, Jean-Charles BUFFET, Tossapol KHAMNAEN, Manutsavin CHARERNSUK, Thawesak PARAWAN
  • UNSYMMETRICAL METALLOCENE CATALYSTS AND USES THEREOF
    Publication number: 20190112325
    Abstract: Unsymmetrical metallocene compounds based on cyclopentadienyl ligands are disclosed, as well as catalytic compositions comprising the compounds supported on solid support materials. The compounds and compositions are useful as catalysts in the polymerisation of olefins. In particular, the compounds and compositions are useful catalysts in the preparation of low molecular weight polyethylene (e.g. polyethylene wax) and copolymers formed from the polymerisation of ethylene and other ?-olefins.
    Type: Application
    Filed: May 10, 2017
    Publication date: April 18, 2019
    Inventors: Dermot O'HARE, Jean-Charles BUFFET, Jessica LAMB, Tossapol KHAMNAEN, Manutsavin CHARERNSUK, Thawesak PARAWAN, Sumate CHAROENCHAIDET