Patents by Inventor Luisa Fraga Trillo

Luisa Fraga Trillo 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 of preparation of copolymers of 1,3-butadiene and styrene useful for the production of tires with low rolling resistance and copolymers of 1,3-butadiene and styrene thus obtained
    Patent number: 5959041
    Abstract: A method of preparation of copolymers of 1,3-butadiene and styrene, useful for the production of tires or elastic materials, characterized by a reduced rolling resistance without detriment to other properties such as skid resistance. The copolymer is prepared using anionic polymerization of 1,3-butadiene and styrene and coupling of part of the chains in star shape with an appropriate compound of tin or silicon, terminating the remainder of the linear chains without coupling using an appropriately selected different compound. The presence of these linear chains terminated with tin yields a beneficial effect in the reduction of rolling resistance when said product is used in tire formulations. The invention also concerns the copolymers of 1,3-butadiene and styrene obtained by said method.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: September 28, 1999
    Assignee: Repsol Quimica S.A.
    Inventors: Valentin Ruiz Santa Quiteria, Juan Antonio Delgado Oyague, Luisa Fraga Trillo, Carmen Sierra Escudero
  • Method of preparation of copolymers of 1,3-butadiene and styrene useful for the production of tires with low rolling resistance and copolymers of 1,3-butadiene and styrene thus obtained
    Patent number: 5798419
    Abstract: A method of preparation of copolymers of 1,3-butadiene and styrene, useful for the production of tires or elastic materials, characterized by a reduced rolling resistance without detriment to other properties such as skid resistance. The copolymer is prepared using anionic polymerization of 1,3-butadiene and styrene and coupling of part of the chains in star shape with an appropriate compound of tin or silicon, terminating the remainder of the linear chains without coupling using an appropriately selected different compound. The presence of these linear chains terminated with tin yields a beneficial effect in the reduction of rolling resistance when said product is used in tire formulations. The invention also concerns the copolymers of 1,3-butadiene and styrene obtained by said method.
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: August 25, 1998
    Assignee: Repsol Quimica S.A.
    Inventors: Valentin Ruiz Santa Quiteria, Juan Antonio Delgado Oyague, Luisa Fraga Trillo, Carmen Sierra Escudero