Patents by Inventor Szu-Ping Lu

Szu-Ping Lu 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: 6670411
    Abstract: A process for separating a solvent and low molecular weight material from an acrylic resin by adding a hindered amine light stabilizer having at least one aminoether group to a mixture of the organic solvent, low molecular weight material and the acrylic resin and subjecting the resulting mixture to an elevated temperature for a time sufficient to remove the solvent and low molecular weight material from the acrylic resin by devolatilization. A composition can be provided which is capable of being formed into a powder coating composition which essentially contains an acrylic resin, a hindered amine light stabilizer having at least one aminoether group or residue thereof and less than 4% by weight of low molecular weight material having a molecular weight less than 600.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: December 30, 2003
    Assignee: Anderson Development Co.
    Inventors: Szu-Ping Lu, Paul J. Prucnal
  • Patent number: 6479588
    Abstract: A graft copolymer comprising a polyamide to which is grafted a glycidyl group-containing acrylate copolymer. The graft copolymer can be prepared by dispersing in an organic solvent a polyamide and a material which will react with the polyamide to form the graft copolymer of the polyamide and the acrylate copolymer and reacting the polyamide and the material so as to form said graft copolymer. The graft copolymer can exhibit improved toughness and reduced friability and can be used to form molded articles and in coating compositions, especially powder coating compositions. The coatings can exhibit transparency, reduced brittleness and increased chip resistance. The powder coatings can further exhibit high gloss and smoothness due to superior flow characteristics thereby enabling thinner coatings to be used that provide acceptable appearance.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: November 12, 2002
    Assignee: Anderson Development Co.
    Inventors: Szu-Ping Lu, Paul J. Prucnal, Hiram A. Norton
  • Publication number: 20020068777
    Abstract: A process for separating a solvent and low molecular weight material from an acrylic resin by adding a hindered amine light stabilizer having at least one aminoether group to a mixture of the organic solvent, low molecular weight material and the acrylic resin and subjecting the resulting mixture to an elevated temperature for a time sufficient to remove the solvent and low molecular weight material from the acrylic resin by devolatilization. A composition can be provided which is capable of being formed into a powder coating composition which essentially contains an acrylic resin, a hindered amine light stabilizer having at least one aminoether group or residue thereof and less than 4% by weight of low molecular weight material having a molecular weight less than 600.
    Type: Application
    Filed: October 3, 2001
    Publication date: June 6, 2002
    Inventors: Szu-Ping Lu, Paul J. Prucnal
  • Patent number: 5744522
    Abstract: A low gloss coating composition having a 60.degree. gloss of less than about 60 which contains:a) a glycidyl group-containing acrylic copolymer;b) an aromatic polyester; andc) an isocyanurate curing agent having the formula: ##STR1## wherein R.sub.1 -R.sub.3 are independently selected from the group consisting of divalent alkylene groups of 1 to 18 carbon atoms and divalent groups of 3 to 21 carbon atoms and containing an ester linkage, and R.sub.4 -R.sub.6 are independently selected from the group consisting of H, organic salt groups, alkyl groups of 1 to 20 carbon atoms and C(O)R.sub.7 wherein R.sub.7 is an alkyl group of 1 to 22 carbon atoms.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: April 28, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Paul J. Prucnal, Szu-Ping Lu