Patents by Inventor Robert P. Zelinski

Robert P. Zelinski 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).

  • Water termination of poly(arylene sulfide) curing
    Patent number: 4321358
    Abstract: In the pre-curing of particulate poly(arylene sulfide) by contact with an oxygen-containing gas in a vessel at a temperature elevated to a range of about 10.degree. to about 70.degree. C. below the melt point of the resin, upon reaching the desired level of pre-cure, the particulate resin is contacted with water thereby rapidly to reduce the temperature level below the temperature at which curing occurs.
    Type: Grant
    Filed: December 2, 1980
    Date of Patent: March 23, 1982
    Assignee: Phillips Petroleum Company
    Inventor: Robert P. Zelinski
  • Hydrogenated block copolymers containing a block derived from low vinyl polybutadiene and a block derived from medium vinyl polybutadiene
    Patent number: 4107236
    Abstract: Polymers are prepared containing a hydrogenated block derived from low vinyl polybutadiene, and a hydrogenated block derived from medium vinyl polybutadiene. The polymers further can contain a block derived from a monovinyl-substituted aromatic compound. The polymers are ozone-resistant, thermoplastic elastomers, with improved high temperature tensile strengths.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: August 15, 1978
    Assignee: Phillips Petroleum Company
    Inventors: Floyd E. Naylor, Robert P. Zelinski
  • Coupling of alkali metal-terminated polymers
    Patent number: 4104332
    Abstract: Alkali metal-terminated polymers of one or more alkadienes and of one or more vinyl-substituted aromatic monomers are effectively coupled by a di-, tri-, or tetra carboxylic acid halide of substituted or unsubstituted benzene.
    Type: Grant
    Filed: March 14, 1977
    Date of Patent: August 1, 1978
    Assignee: Phillips Petroleum Company
    Inventor: Robert P. Zelinski
  • Coupling of alkali metal-terminated polymers
    Patent number: 4039633
    Abstract: Alkali metal-terminated polymers of one or more alkadienes and of one or more vinyl-substituted aromatic monomers are effectively coupled by a di-, tri-, or tetra carboxylic acid halide of substituted or unsubstituted benzene.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: August 2, 1977
    Assignee: Phillips Petroleum Company
    Inventor: Robert P. Zelinski
  • Method for modifying the properties of rubbery polymers of conjugated dienes
    Patent number: 4012566
    Abstract: The physical properties of rubbery polymers of conjugated dienes are modified by treatment with a homogeneous olefin disproportionation catalyst thereby modifying at least one of the properties of cold flow, inherent viscosity or Mooney viscosity.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: March 15, 1977
    Assignee: Phillips Petroleum Company
    Inventors: Robert P. Zelinski, Rudolph H. Gath
  • Process and catalyst for production of rubbery polymers
    Patent number: 3976630
    Abstract: Rubbery polybutadiene containing at least 85 percent cis 1,4-addition can be made by polymerizing 1,3-butadiene with a catalyst formed from trialkylaluminum, for example, triethylaluminum, and titanium tetraiodide. The rubbery polybutadiene exhibits low hysteresis and is particularly useful in the manufacture of tires.
    Type: Grant
    Filed: April 16, 1956
    Date of Patent: August 24, 1976
    Assignee: Phillips Petroleum Company
    Inventors: David R. Smith, Robert P. Zelinski