Patents by Inventor Sergio A. Guillén-Castellanos

Sergio A. Guillén-Castellanos 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).

  • Halobutyl elastomers
    Patent number: 8198379
    Abstract: The present invention relates to the modification of butyl elastomers, particularly halobutyl elastomers, under solvent free conditions with a phase transfer catalyst in the presence of an alkyl metal salt of an oxygen or sulfur-based nucleophile.
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: June 12, 2012
    Assignee: LANXESS Inc.
    Inventors: John Scott Parent, Ralph Allen Whitney, Sergio A. Guillén-Castellanos, Rui Resendes
  • Methods for the preparation of butyl graft copolymers
    Patent number: 7629418
    Abstract: Preparation of butyl rubber based graft co-polymers from halobutyl elastomers using phase transfer catalysts in the presence of a solution of an alkali metal salt of an oxygen or sulfur nucleophile that is bound to a polymeric substrate. Graft co-polymers can be produced of a butyl polymer (isobutene-co-isoprene) and polymeric substrates such as polyethylene, polypropylene, polystyrene, polybutadiene, polysilanes, polysiloxanes, polyethylene glycol, polyethylene oxide, polyphosphazenes, polyferrocenes or their hybrids.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: December 8, 2009
    Assignees: LANXESS Inc., Queen's University at Kingston
    Inventors: John Scott Parent, Sergio A. Guillén-Castellanos, Ralph Allen Whitney, Rui Resendes
  • HALOBUTYL ELASTOMERS
    Publication number: 20090203850
    Abstract: The present invention relates to the modification of butyl elastomers, particularly halobutyl elastomers, under solvent free conditions with a phase transfer catalyst in the presence of an alkyl metal salt of an oxygen or sulfur-based nucleophile.
    Type: Application
    Filed: August 2, 2006
    Publication date: August 13, 2009
    Applicants: QUEEN'S UNIVERSITY AT KINGSTON, LANXESS Inc.
    Inventors: John Scott Parent, Ralph Allen Whitney, Sergio A. Guillen-Castellanos, Rui Resendes
  • Novel methods for the preparation of butyl graft copolymers
    Publication number: 20070049695
    Abstract: Preparation of butyl rubber based graft co-polymers from halobutyl elastomers using phase transfer catalysts in the presence of a solution of an alkali metal salt of an oxygen or sulfur nucleophile that is bound to a polymeric substrate. Graft co-polymers can be produced of a butyl polymer (isobutene-coisoprene) and polymeric substrates such as polyethylene, polypropylene, polystyrene, polybutadiene, polysilanes, polysiloxanes, polyethylene glycol, polyethylene oxide, polyphosphazenes, polyferrocenes or their hybrids.
    Type: Application
    Filed: August 17, 2006
    Publication date: March 1, 2007
    Inventors: John Parent, Sergio Guillen-Castellanos, Ralph Whitney, Rui Resendes