Abstract: A high strength, flexible crosslinked polyethylene (PEX) material is provided wherein the base polymer is intermixed with a polymer modifier which affects the amorphous region of the polymer, leaving the crystalline portion of the base polymer virtually unaffected. Consequently, the amorphous region's density is lowered, resulting in a more flexible final product, while the crosslinked molecular structure and/or crystalline portion of the polymer, which controls the strength of the base polymer, remains strong. The polymer modifier can comprise a hydrocarbon fluid such as PAO, Group III basestocks, or a gas-to-liquid hydrocarbon. A method for producing the plastic material is also provided. The plastic material has particular utility in the production of tubing, piping, and conduits for transporting gases, liquids, and the like, as well as wire and cable coatings such as jacketing and insulation.
Type:
Application
Filed:
June 18, 2008
Publication date:
December 25, 2008
Applicants:
EXXONMOBIL CHEMICAL COMPANY INC., ZURN PEX, INC.
Inventors:
Gary Lee Runyan, Bruce A. Harrington, Bryan R. Chapman, David B. Dunaway, Gerd Arthur Allermann, Robert G. Russell, Rodney Mize
Abstract: This invention is directed to a process for producing one or more olefins from an oxygenate feed. According to the invention, an oxygenate stream is provided and a recycle stream is added to the oxygenate stream to form a feed stream to an oxygenate-to-olefin conversion system. The recycle stream comprises (i.e., contains) propane and dimethyl ether.
Type:
Application
Filed:
February 20, 2008
Publication date:
October 2, 2008
Applicant:
ExxonMobil Chemical Company Law Technology
Inventors:
Gerald G. McGlamery, James H. Beech, Michael P. Nicoletti, Cornelis F. Van Egmond
Abstract: In acid catalysed continuous hydrocarbon conversion reactions such as olefin oligomerisation or alkylation in the presence of phosphoric acid or zeolite catalysts the hydrocarbon feed is hydrated and the degree of hydration is adjusted according to the composition of the feed.
Type:
Application
Filed:
December 16, 2004
Publication date:
November 1, 2007
Applicant:
EXXONMOBIL CHEMICAL COMPANY
Inventors:
Stephen Beadle, Stephen Brown, John Godsmark, Georges Mathys
Abstract: A process for rendering films, film composites, and articles made therefrom less resistant to passage of water vapor by passing a filled precursor film or film composite through the nip of interdigitating grooved rollers. The films or film composites are generally formed using a precursor film of a film forming polyolefin or polyolefin blend, with a relatively high filler loading and optionally an elastomer. A process is disclosed for making diapers or other disposable items where a relatively high water vapor is coupled with a resistance to liquid strikethrough.
Type:
Grant
Filed:
July 31, 1996
Date of Patent:
August 17, 2004
Assignee:
ExxonMobil Chemical Company
Inventors:
Kevin Arthur Brady, John Jay Burnett, Carol Lynn Klug
Abstract: Polyolefin/filler breathable films may be produced by machine or transverse direction orientation using interdigitating grooved rollers. Biaxial orientation to similarly produce breathable films may be accomplished by the same method. By heating the rollers, the breathability of the film is increased without increasing the depth of engagement of the interdigitating rollers.
Abstract: A process/apparatus is disclosed for continuously separating a liquid medium comprising diluent and unreacted monomers from a polymerization effluent comprising diluent, unreacted monomers and polymer solids, comprising a continuous discharge of the polymerization effluent from a slurry reactor through a discharge valve and transfer conduit into a first intermediate pressure flash tank with a conical bottom defined by substantially straight sides inclined at an angle to that of horizontal equal to or greater than the angle of slide of the slurry/polymer solids and an exit seal chamber of such diameter (d) and length (l) as to maintain a desired volume of concentrated polymer solids/slurry in the exit seal chamber such as to form a pressure seal while continuously discharging a plug flow of concentrated polymer solids/slurry bottom product of said first flash tank from the exit seal chamber through a seal chamber exit reducer with inclined sides defined by substantially straight sides inclined at an angle to t
Type:
Application
Filed:
March 11, 2003
Publication date:
October 30, 2003
Applicant:
ExxonMobil Chemical Company
Inventors:
James A. Kendrick, Thomas W. Towles, Scott Thomas Roger
Abstract: A process/apparatus is disclosed for continuously separating a liquid medium comprising diluent and unreacted monomers from a polymerization effluent comprising diluent, unreacted monomers and polymer solids, comprising a continuous discharge of the polymerization effluent from a slurry reactor through a discharge valve and transfer conduit into a first intermediate pressure flash tank with a conical bottom defined by substantially straight sides inclined at an angle to that of horizontal equal to or greater than the angle of slide of the slurry/polymer solids and an exit seal chamber of such diameter (d) and length (l) as to maintain a desired volume of concentrated polymer solids/slurry in the exit seal chamber such as to form a pressure seal while continuously discharging a plug flow of concentrated polymer solids/slurry bottom product of the first flash tank from the exit seal chamber through a seal chamber exit reducer with inclined sides defined by substantially straight sides inclined at an angle to th
Type:
Application
Filed:
March 11, 2003
Publication date:
October 23, 2003
Applicant:
ExxonMobil Chemical Company
Inventors:
James Austin Kendrick, Thomas W. Towles, Scott Thomas Roger
Abstract: An oriented multilayer film comprises:
(a) a base layer containing a thermoplastic polymer;
(b) at least one tie layer; and
(c) at least one outer layer containing a metallocene catalyzed polyethylene chosen for its performance as an adhesion layer and having improved processability. The multilayer films are useful for various end uses including printing, metallization, adhesive lamination, and cold sealing.
Type:
Grant
Filed:
July 8, 1999
Date of Patent:
October 1, 2002
Assignee:
ExxonMobil Chemical Company
Inventors:
John P. DeLisio, Lyle J. Harley, Jay K. Keung, Robert G. Peet