Patents Represented by Attorney, Agent or Law Firm Charles E Ronyan
  • Patent number: 6225432
    Abstract: Branched polypropylene compositions which have improved melt strength and good processability are provided. The branched polypropylene compositions of the present invention have a polydispersity of less than 4.0 and a melt point greater than 90° C. Further, the weight average branching index g of the polypropylene compositions is less than 0.95. Additionally, a novel process is provided for efficiently producing a branched polypropylene composition comprising: a) contacting propylene monomers in a reactor with an inert hydrocarbon solvent or diluent and a catalyst composition comprising one or more single site catalyst compounds capable of producing stereospecific polypropylene at a temperature from about 40° C. to about 120° C., wherein the ratio in the reactor of the propylene monomers to the inert hydrocarbon solvent or diluent is less than 9.
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: May 1, 2001
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Weiqing Weng, Eric J. Markel, Armenag H. Dekmezian, Palanisamy Arjunan