Patents by Inventor Raùl Quijada Abarca

Raùl Quijada Abarca 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).

  • Patent number: 9481800
    Abstract: The present invention is related to polymeric materials, in particular thermoplastic or resins, with antifouling, biocidal, antiviral and antimicrobial properties. In particular, the present invention comprises a polymeric material with antimicrobial properties, wherein said antimicrobial property is given by the controlled and maintained in time release of elements or compounds with antimicrobial properties. The present invention also relates to the preparation method and products generated from said polymeric materials with antimicrobial properties.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: November 1, 2016
    Assignee: UNIVERSIDAD DE CHILE
    Inventors: Humberto Cristian Palza Cordero, Raul Quijada Abarca, Katherine Delgado Vargas, Ivette Pinochet Troncoso
  • Publication number: 20150218390
    Abstract: The present invention is related to polymeric materials, in particular thermoplastic or resins, with antifouling, biocidal, antiviral and antimicrobial properties. In particular, the present invention comprises a polymeric material with antimicrobial properties, wherein said antimicrobial property is given by the controlled and maintained in time release of elements or compounds with antimicrobial properties. The present invention also relates to the preparation method and products generated from said polymeric materials with antimicrobial properties.
    Type: Application
    Filed: August 21, 2013
    Publication date: August 6, 2015
    Inventors: Humberto Cristian Palza Cordero, Raul Quijada Abarca, Katherine Delgado Vargas, Ivette Pinochet Troncoso
  • Publication number: 20140377562
    Abstract: The invention discloses a nanoreinforcement to produce polymeric nanocomposites from a natural laminar silicate from volcanic sources. The invention also discloses the manufacture process and use thereof to obtain polyolefin nanocomposites useful for the automotive, aerospace, construction and packaging industries, among others.
    Type: Application
    Filed: November 20, 2012
    Publication date: December 25, 2014
    Inventors: Patricio Toro Estay, Raul Quijada Abarca, Mehrdad Yazdani-Pedram Zobeiri
  • Patent number: 8664308
    Abstract: The present invention relates to compatibilizers to be used for obtaining materials called polyolefin nanocomposites, microcomposites and polymer blends, and it includes the process for obtaining such compatibilizers. Such compatibilizers are obtained from the monomers of the organic compounds itaconic acid (ITA) or its monooctadecyl itaconate (MODIT) derivative. The compatibilizers are polyolefins grafted with those monomers, which are characterized by having functional groups with a hydrophilic character and a polymer backbone with a hydrophobic character. The compatibilizers of this invention are characterized by having controlled degrees of grafting of these monomers, and they can be used optimally in various applications. It also relates to the process for obtaining such compatibilizers.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: March 4, 2014
    Assignee: Universidad de Chile
    Inventors: Mehrdad Yazdani-Pedram, Raúl Quijada Abarca, Edwin Alexander Moncada Acevedo
  • Patent number: 8034867
    Abstract: Hybrid clays for obtaining nanocomposites useful in the automotive, aviation, construction and packaging industry, among others. The hybrid clay comprises clays intercalated with the itaconic acid (ITA) monomer or its derivative monooctadecyl itaconate (MODIT), and a process for the preparation of these hybrid clays and the process to obtain polyolefin/clay nanocomposites.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: October 11, 2011
    Assignee: Universidad de Chile
    Inventors: Raùl Quijada Abarca, Patricio Toro Estay, Mehrdad Yazdani-Pedram
  • Publication number: 20110048282
    Abstract: Nanoparticles with controlled and highly monodispersed morphology made using a modified Stöber sol-gel process. The hybrid silica nanoparticles with controlled morphology having uniform size, shape or both, and contain an aliphatic amine of 2-20 carbon atom, or an alkoxide compound selected from the group consisting of siliceous alkoxide (R?(X)—Si—(OR?)(4-X)), and/or titanium alkoxide (R?(X)—Ti—(OR?)(4-X)) and/or zirconium alkoxide (R?(X)—Zr—(OR?)(4-X)), wherein R? group can be equal or different that R?, and the R group in the chemical structure are between 1 to 18 carbon atoms, and mixtures thereof, having from one to four alkoxy groups, or a combination of said aliphatic amine and said alkoxide compound.
    Type: Application
    Filed: July 29, 2010
    Publication date: March 3, 2011
    Inventors: Raúl QUIJADA ABARCA, Edwin Moncada Acevedo
  • Publication number: 20100160509
    Abstract: The present invention relates to compatibilizers to be used for obtaining materials called polyolefin nanocomposites, microcomposites and polymer blends, and it includes the process for obtaining such compatibilizers. Such compatibilizers are obtained from the monomers of the organic compounds itaconic acid (ITA) or its monooctadecyl itaconate (MODIT) derivative. The compatibilizers are polyolefins grafted with those monomers, which are characterized by having functional groups with a hydrophilic character and a polymer backbone with a hydrophobic character. The compatibilizers of this invention are characterized by having controlled degrees of grafting of these monomers, and they can be used optimally in various applications.
    Type: Application
    Filed: October 10, 2007
    Publication date: June 24, 2010
    Inventors: Mehrdad Yazdani-Pedram, Raul Quijada Abarca, Patricio Toro Estay, Edwin Alexander Moncada Acevedo
  • Publication number: 20090209687
    Abstract: Hybrid clays for obtaining nanocomposites useful in the automotive, aviation, construction and packaging industry, among others. The hybrid clay comprises clays intercalated with the itaconic acid (ITA) monomer or its derivative monooctadecyl itaconate (MODIT), and a process for the preparation of these hybrid clays and the process to obtain polyolefin/clay nanocomposites.
    Type: Application
    Filed: April 13, 2009
    Publication date: August 20, 2009
    Inventors: Raul QUIJADA ABARCA, Patricio Toro Estay, Mehrdad Yazdani-Pedram
  • Patent number: 7459492
    Abstract: This invention reveals polypropylene composites to be used in the automotive, electronics, packaging and textile industries, which comprises a polypropylene homopolymer in a proportion ranging from 10 to 60% by weight, a natural reinforcement based on eggshells, and an antioxidant. This invention also reveals a natural reinforcement produced from eggshells obtained as an agroindustrial waste, the process to obtain said composite, and the process to obtain such reinforcement. By means of this invention, polypropylene composites using the natural reinforcement are obtained that have improved mechanical and thermal behavior when compared to polypropylene composites using traditional mineral reinforcements.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: December 2, 2008
    Assignee: Universidad de Chile
    Inventors: José Luis Arias Bautista, Juan Raúl Quijada Abarca, Patricio Fernando Toro Estay, Pedram Mehrdad Yazdani
  • Patent number: 6133188
    Abstract: A preparation process for a catalytic support, based on a special alumina modified with varying quantities of magnesium chloride is described, a higher rate of MgCl.sub.2 leading to a lesser quantity of heavy molecular chains in the final polymer. The support, prepared by milling the special alumina together with the MgCl.sub.2 previously treated with ethyl benzoate, is impregnated with TiCl.sub.4 in order to create the catalyst. The resulting catalysts show high activity, which enables the metallic residue and chloride eliminating stage to be avoided in the resin so created. Furthermore the types of molecular weight distribution and of mechanical properties are different for the polymers produced.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 17, 2000
    Assignees: Petroleo Brasileiro S.A. - Petrobras, Polialden Petroquimica S.A.
    Inventors: Juan Raul Quijada Abarca, Dellyo Ricardo dos Santos Alvares
  • Patent number: 6018006
    Abstract: A preparation process for a catalytic support, based on a special alumina modified with varying quantities of magnesium chloride is described, a higher rate of MgCl.sub.2 leading to a lesser quantity of heavy molecular chains in the final polymer. The support, prepared by milling the special alumina together with the MgCl.sub.2 previously treated with ethyl benzoate, is impregnated with TiCl.sub.4 in order to create the catalyst. The resulting catalysts show high activity, which enables the metallic residue and chloride eliminating stage to be avoided in the resin so created. Furthermore the types of molecular weight distribution and of mechanical properties are different for the polymers produced.
    Type: Grant
    Filed: December 14, 1994
    Date of Patent: January 25, 2000
    Assignees: Petroleo Brasileiro S.A. - Petrobras, Polialden Petroquimica S.A.
    Inventors: Juan Raul Quijada Abarca, Dellyo Ricardo dos Santos Alvares