Patents by Inventor Robert A. Van Brederode

Robert A. Van Brederode 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: 4225650
    Abstract: A fusable powder composition comprising a cross-linkable organic polymeric material of less than 75 micron size, an organic peroxide, and preferably for some polymers an organosilicon compound for forming polymeric coatings on substrates such as glass or metal.
    Type: Grant
    Filed: October 22, 1975
    Date of Patent: September 30, 1980
    Assignee: Exxon Research & Engineering Co.
    Inventors: Robert A. van Brederode, Robert A. Steinkamp
  • Patent number: 4066608
    Abstract: A three component LTHA stabilizer system of distearyl thiodipropionate, tris(3,5-di-t-butyl-4-hydroxybenzyl isocyanurate, sold under the trademark Goodrite 3114 and cyclic neopentanetetrayl bis(octadecylphosphite), sold under the trademark Weston 618 particularly suitable for glass fiber reinforced homopolypropylene or acrylic acid grafted propylene polymers. Key parts of the invention include well defined ratios of the thioester and phenolic components and good dispersion of the glass fiber to achieve the desired stability. The stabilizer system is good for other acrylic acid grafted polypropylene polymers which include impact modifiers. Other grafting monomers can be substituted for the acrylic acid.
    Type: Grant
    Filed: September 25, 1975
    Date of Patent: January 3, 1978
    Assignee: Exxon Research & Engineering Co.
    Inventor: Robert A. van Brederode
  • Patent number: 4012461
    Abstract: A process for producing fine polymer powders which comprises dissolving 1 to 40 weight percent of a polymer in a solvent at a temperature in the range of 90.degree. to 165.degree. C under autogenous conditions, cooling the solution to a temperature to precipitate the polymer and to leave in solution an amount of polymer less than that which will inhibit the formation of droplets upon atomization of the solution into a drying zone, said cooling being carried out under agitation conditions of high shear, to produce a slurry of particulate polymer and solvent, atomizing said slurry into a vaporization zone, feeding a drying gas into the vaporation zone at a temperature in the range of 90.degree. to 160.degree. C, recovering the partially dry polymer particles, drying the particles and recovering a polymer powder of less than 100 micron size.
    Type: Grant
    Filed: August 6, 1975
    Date of Patent: March 15, 1977
    Assignee: Exxon Research and Engineering Company
    Inventor: Robert A. VAN Brederode
  • Patent number: 3993713
    Abstract: Finely powdered high density polymer may be obtained by spraying a solution of a critical maximum amount of a polymer, such as 3 weight % polypropylene in heptane, into a drying atmosphere in which said solvent has a vapor pressure of 50 to 400 mm of Hg.
    Type: Grant
    Filed: August 6, 1975
    Date of Patent: November 23, 1976
    Assignee: Exxon Research and Engineering Company
    Inventors: Robert A. VAN Brederode, Joseph C. Floyd
  • Patent number: 3981957
    Abstract: A high density polymer powder is prepared by preparing a melt of the polymer, and intimately mixing from 10 to 50 weight percent of a solvent therewith, and discharging the mixture through an atomizing nozzle.
    Type: Grant
    Filed: August 6, 1975
    Date of Patent: September 21, 1976
    Assignee: Exxon Research and Engineering Company
    Inventors: Robert A. VAN Brederode, Robert A. Steinkamp
  • Patent number: 3966845
    Abstract: Polyolefins which have been modified by being graft polymerized with from about 1 to 15 weight percent of an acrylic acid or derivative thereof are outstanding nucleating agents when added to unmodified polyolefins in concentrations of about 0.1 to 15 weight percent.
    Type: Grant
    Filed: May 22, 1974
    Date of Patent: June 29, 1976
    Assignee: Exxon Research & Engineering Co.
    Inventors: Robert A. Van Brederode, Robert A. Steinkamp