Patents by Inventor Elena Prats

Elena Prats 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).

  • Method to start-up a process to make non-expandable vinyl aromatic polymers
    Patent number: 10093057
    Abstract: The present invention is a method to start-up a process to make expandable vinyl aromatic polymer pellets comprising, a) providing a pelletizer (S) containing means to introduce the molten vinyl aromatic polymer comprising the expandable agent and optionally additives, a die plate having a plurality of holes of small diameter, typically in the range 0.8 to 1.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: October 9, 2018
    Assignee: TOTAL RESEARCH & TECHNOLOGY FELUY
    Inventors: Michel Cassart, Francis Couget, Elena Prats
  • Method to Start-up a Process to Make Non-Expandable Vinyl Aromatic Polymers
    Publication number: 20140319715
    Abstract: A method for producing non-expandable pellets can include introducing a vinyl aromatic polymer to a pelletizer (L). The pelletizer (L) can have a die plate having a holes of large diameter. During the start-up of the production of the non-expandable pellets, pellets can be produced in the pelletizer (L). When the polymer flow rate is in the operating range of the pelletizer (S), the introduction of the vinyl aromatic polymer can be switched from the pelletizer (L) to the pelletizer (S). The pelletizer (S) can be operated at conditions effective to produce the non-expandable pellets. The pelletizer (S) can have a die plate having holes of small diameter. The non-expandable pellets can be recovered from the pelletizer (S), and the pellets can be recovered from the pelletizer (L).
    Type: Application
    Filed: June 11, 2014
    Publication date: October 30, 2014
    Inventors: Michel Cassart, Francis Couget, Elena Prats
  • Method to start-up a process to make expandable vinyl aromatic polymers
    Patent number: 8801982
    Abstract: A method for producing expandable pellets can include introducing a vinyl aromatic polymer and an expandable agent to a pelletizer (L). The pelletizer (L) can have a die plate having a holes of large diameter. During the start-up of the production of the expandable pellets, pellets can be produced in the pelletizer (L). When the polymer flow rate is in the operating range of the pelletizer (S), the introduction of the vinyl aromatic polymer and the expandable agent can be switched from the pelletizer (L) to the pelletizer (S). The pelletizer (S) can be operated at conditions effective to produce the expandable pellets. The pelletizer (S) can have a die plate having holes of small diameter. The expandable pellets can be recovered from the pelletizer (S), and the pellets can be recovered from the pelletizer (L).
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: August 12, 2014
    Assignee: Total Research & Technology Feluy
    Inventors: Michel Cassart, Francis Couget, Elena Prats
  • METHOD TO START-UP A PROCESS TO MAKE EXPANDABLE VINYL AROMATIC POLYMERS
    Publication number: 20130203876
    Abstract: The present invention is a method to start-up a process to make expandable vinyl aromatic polymer pellets comprising, a) providing a pelletizer (S) containing means to introduce the molten vinyl aromatic polymer comprising the expandable agent and optionally additives, a die plate having a plurality of holes of small diameter, typically in the range 0.8 to 1.
    Type: Application
    Filed: January 27, 2011
    Publication date: August 8, 2013
    Applicant: Total Petrochemicals Research Feluy
    Inventors: Michel Cassart, Francis Couget, Elena Prats