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Kumudini Chandrika Jayaratne

from Bartlesville, OK
Age ~68
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Also known as:
Kumudini C Jayaratne, Kumudina C Jayarapne
Phone and address:
1609 King Dr, Bartlesville, OK 74006
(918) 333-4616
Connected to:
Paul M Jayaseelan, 54Sabarinath Jayaseelan, 43Chad M Jayasekera, 43Gayan Jayasekara, 57Saman W Jayasekara, 48Chathurani S Jayasena, 46Raj Jayashankar, 55Hansaka Jayasinghe, 35Sandra A Jayasinghe, 83Chandana K Jayasooriya, 53

Kumudini Jayaratne Phones & Addresses

  • 1609 King Dr, Bartlesville, OK 74006 (918) 333-4616
  • Peoria, IL
  • Nashville, TN
  • 4800 Berwyn House Rd, College Park, MD 20740 (301) 982-4302
  • Blacksburg, VA
  • Detroit, MI

Resumes

Resumes

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Kumudini Jayaratne

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Publications

Us Patents

Stereospecific Living Polymerization Of Olefins By A Novel Ziegler-Natta Catalyst Composition

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US Patent:
6579998, Jun 17, 2003
Filed:
May 7, 2001
Appl. No.:
09/849244
Inventors:
Lawrence R. Sita - Silver Spring MD
Kumudini C. Jayaratne - College Park MD
Assignee:
University of Maryland, College Park - College Park MD
International Classification:
C07F 1700
US Classification:
556 53, 556 11, 556 12, 526160, 526943, 502103, 502117, 502152
Abstract:
An olefin polymerization pre-catalyst and a method for preparing an activated olefin polymerization catalyst composition from the pre-catalyst are disclosed: wherein M, R , R , R , R and R are defined herein.

Polymerization Catalysts And Process For Producing Bimodal Polymers In A Single Reactor

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US Patent:
7226886, Jun 5, 2007
Filed:
Sep 15, 2005
Appl. No.:
11/208077
Inventors:
Kumudini C. Jayaratne - Bartlesville OK, US
Michael D. Jensen - Laurel MD, US
Qing Yang - Bartlesville OK, US
Assignee:
Chevron Phillips Chemical Company, L.P. - The Woodlands TX
International Classification:
B01J 31/38
C08F 4/642
C08F 4/76
US Classification:
502129, 502103, 526118, 526119, 526943
Abstract:
Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. An improved method for preparing cyclopentadienyl complexes used to produce polyolefins is also provided.

Polymerization Catalysts And Process For Producing Bimodal Polymers In A Single Reactor

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US Patent:
7521572, Apr 21, 2009
Filed:
Feb 12, 2007
Appl. No.:
11/705695
Inventors:
Kumudini C. Jayaratne - Bartlesville OK, US
Michael D. Jensen - Laurel MD, US
Qing Yang - Bartlesville OK, US
Assignee:
Chevron Phillips Chemical Company, LP - The Woodlands TX
International Classification:
C07F 17/00
C08F 4/76
C08F 4/64
US Classification:
556 53, 556 51, 556 52, 526943, 526941, 526160, 526170
Abstract:
Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. An improved method for preparing cyclopentadienyl complexes used to produce polyolefins is also provided.

Catalysts For Olefin Polymerization

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US Patent:
7534842, May 19, 2009
Filed:
Nov 16, 2005
Appl. No.:
11/280426
Inventors:
Kumudini C. Jayaratne - Bartlesville OK, US
Michael D. Jensen - Laurel MD, US
Matthew G. Thorn - Mason OH, US
Max P. McDaniel - Bartlesville OK, US
Qing Yang - Bartlesville OK, US
Assignee:
Chevron Phillips Chemical Company, LP - The Woodlands TX
International Classification:
C08F 4/64
C08F 4/76
B01J 31/38
B01J 27/053
US Classification:
526172, 526161, 526156, 526160, 526170, 526140, 526146, 502217, 502122, 502118, 502104, 502103, 502152
Abstract:
This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a catalyst composition. One aspect of this invention is the formation and use of a catalyst composition comprising a transition metal compound and an activator for olefin polymerization processes.

Polyethylene Compositions And Pipe Made From Same

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US Patent:
7589162, Sep 15, 2009
Filed:
Feb 22, 2006
Appl. No.:
11/358959
Inventors:
Rajendra K. Krishnaswamy - Bartlesville OK, US
Qing Yang - Bartlesville OK, US
David C. Rohlfing - Bartlesville OK, US
Max P. McDaniel - Bartlesville OK, US
Kumudini C. Jayaratne - Bartlesville OK, US
Jim E. French - Bartlesville OK, US
Assignee:
Chevron Philips Chemical Company LP - The Woodlands TX
International Classification:
C08F 10/02
C08F 210/16
C08L 23/06
F16L 9/12
US Classification:
5263482, 526348, 5263483, 5263484, 5263485, 526113, 526114, 526118, 526119, 428 368
Abstract:
A polymer composition comprising a density equal to or greater than about 0. 947 g/cc, a high load melt index from about 1 g/10 min to about 30 g/10 min, and a tensile natural draw ratio less than about 14167 ρ-12958, where ρ is the density (g/cc) of the composition. A polymer composition comprising a tensile natural draw ratio less than about 14167ρ-12958, where ρ is the density (g/cc) of the composition and wherein less than about 1 weight percent of the composition comprises non-polymeric additives.

Dual Metallocene Catalysts For Polymerization Of Bimodal Polymers

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US Patent:
7619047, Nov 17, 2009
Filed:
Feb 22, 2006
Appl. No.:
11/359972
Inventors:
Qing Yang - Bartlesville OK, US
Kumudini C. Jayaratne - Bartlesville OK, US
Michael D. Jensen - Laurel MD, US
Max P. McDaniel - Bartlesville OK, US
Joel L. Martin - Bartlesville OK, US
Matthew G. Thorn - Mason OH, US
Jerry T. Lanier - Bartlesville OK, US
Tony R. Crain - Niotaze KS, US
Assignee:
Chevron Phillips Chemical Company, LP - The Woodlands TX
International Classification:
C08F 4/02
C08F 4/655
C08F 4/6592
US Classification:
526116, 526114, 526129, 526160, 526943, 502113, 502120, 502152
Abstract:
This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η-cyclopentadienyl-type ligands, in combination with at least one second Group 4 metallocene with non-bridging η-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclosed herein provide ethylene polymers with a bimodal molecular weight distribution.

Polyethylene Film Having Improved Mechanical And Barrier Properties And Method Of Making Same

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US Patent:
7632907, Dec 15, 2009
Filed:
Jun 28, 2006
Appl. No.:
11/427019
Inventors:
Ashish M. Sukhadia - Bartlesville OK, US
Joel L. Martin - Bartlesville OK, US
Qing Yang - Bartlesville OK, US
Kumudini C. Jayaratne - Bartlesville OK, US
J. Todd Lanier - Bartlesville OK, US
Assignee:
Chevron Phillips Chemical Company LP - The Woodlands TX
International Classification:
C08F 210/00
C08F 110/00
C08F 110/02
C08F 10/00
C08F 8/00
C08L 23/00
C08L 23/04
B32B 27/00
B32B 27/08
US Classification:
5263481, 526348, 526352, 525191, 525240, 428500, 428515, 428523, 428 98
Abstract:
A polyethylene film comprising a polymer composition having the characteristics of a total energy dart drop, measured in accordance with ASTM D4272, of greater than a bout 0. 45 ft. lbf, a dart drop impact strength, measured in accordance with ASTM D1709 Method A, of greater than about 135 g, and a moisture vapor transmission rate, measured in accordance with ASTM F1249 at 100 F. and 90% relative. humidity, of less than about 0. 85 g-mil/100 square inch/24 hr, wherein said ASTM tests are performed on a test specimen having a 0. 8 mil thickness.

Process For Preparing A Monocyclopentadienyl Compound

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US Patent:
7910763, Mar 22, 2011
Filed:
Jan 21, 2009
Appl. No.:
12/357007
Inventors:
Kumudini C. Jayaratne - Bartlesville OK, US
Michael D. Jensen - Laurel MD, US
Qing Yang - Bartlesville OK, US
Assignee:
Chevron Phillips Chemical Company LP - The Woodlands TX
International Classification:
C07F 7/00
C07F 17/00
US Classification:
556 52, 556 51
Abstract:
Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. An improved method for preparing cyclopentadienyl complexes used to produce polyolefins is also provided.
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Kumudini Chandrika Jayaratne from Bartlesville, OK, age ~68 Get Report