Multimodal polyethylene compositions and pipe made from same

Details Multimodal polyethylene compositions and pipe made from same Multimodal polyethylene compositions and pipe made from same

2005-11-02

2009-12-01

Wu, David (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C526S348500, C526S352200, C428S036900, C138S178000

Reexamination Certificate

active

07625982

ABSTRACT:
A multimodal polyethylene composition having at least two polyethylene components, wherein each component has a molecular weight distribution of equal to or less than about 5, one component has a higher molecular weight than the other component, and the higher molecular weight component has an “a” parameter value of equal to or greater than about 0.35 when fitted to the Carreau-Yasuda equation with n=0.

REFERENCES:
patent: 3248179 (1966-04-01), Norwood
patent: 4501885 (1985-02-01), Sherk et al.
patent: 4588790 (1986-05-01), Jenkins, III et al.
patent: 4939217 (1990-07-01), Stricklen
patent: 5064797 (1991-11-01), Stricklen
patent: 5352749 (1994-10-01), DeChellis et al.
patent: 5436304 (1995-07-01), Griffin et al.
patent: 5455314 (1995-10-01), Burns et al.
patent: 5565175 (1996-10-01), Hottovy et al.
patent: 5575979 (1996-11-01), Hanson
patent: 5719241 (1998-02-01), Razavi et al.
patent: 5907021 (1999-05-01), Turner et al.
patent: 6218472 (2001-04-01), Debras et al.
patent: 6239235 (2001-05-01), Hottovy et al.
patent: 6262191 (2001-07-01), Hottovy et al.
patent: 6268447 (2001-07-01), Murray et al.
patent: 6274684 (2001-08-01), Loveday et al.
patent: 6346575 (2002-02-01), Debras et al.
patent: 6462161 (2002-10-01), Cady et al.
patent: 6489263 (2002-12-01), Murray et al.
patent: 6833415 (2004-12-01), Kendrick et al.
patent: 6878454 (2005-04-01), Shannon et al.
patent: 6878784 (2005-04-01), Asumalahti et al.
patent: 6904940 (2005-06-01), Scheelen et al.
patent: 7064225 (2006-06-01), Thorn et al.
patent: 7129296 (2006-10-01), Van Dun et al.
patent: 7141632 (2006-11-01), Vaughan et al.
patent: 7193017 (2007-03-01), Kwalk
patent: 2004/0034169 (2004-02-01), Zhou et al.
patent: 2004/0132933 (2004-07-01), Crowther et al.
patent: 2005/0153830 (2005-07-01), Jensen et al.
patent: 2005/0154159 (2005-07-01), DesLauriers et al.
patent: 2005/0245689 (2005-11-01), Krishnaswamy et al.
patent: 2005/0288461 (2005-12-01), Jensen et al.
patent: 2005/0288462 (2005-12-01), Jensen et al.
patent: 1 201 711 (2002-05-01), None
patent: 1201711 (2002-05-01), None
patent: 1359192 (2003-11-01), None
patent: 1 405 866 (2004-04-01), None
patent: WO 01/25328 (2001-04-01), None
patent: WO 01/25328 (2001-04-01), None
patent: WO 03/008468 (2003-01-01), None
patent: WO 03/020821 (2003-03-01), None
patent: WO 03/037941 (2003-05-01), None
patent: WO 2005/108484 (2005-11-01), None
patent: WO 2007/024773 (2007-03-01), None
“Engineering Properties of Polyethylene,” The Plastics Pipe Institute, Inc., Chapter 3, pp. 47-106.
Bird, R. Byron, et al., “Dynamics of Polymeric Liquids,” A Wiley-Interscience Publication, vol. 1—Fluid Mechanics, Second Edition, 1987, 10 pgs.
Hieber, C.A., et al., “Some correlations involving the shear viscosity of polystyrene melts,” Rheologica Acta, vol. 28, No. 4, 1989, pgs. 321-332.
Hieber, C.A., et al., “Shear-Rate-Dependence Modeling of Polymer Melt Viscosity,” Polymer Engineering and Science, vol. 32, No. 14, Jul. 1992, pgs. 931-938.
Patent application entitled “Polymerization Catalysts and Process for Producing Bimodal Polymers in a Single Reactor,” filed Aug. 22, 2005, as U.S. Appl. No. 11/209,006.
Patent application entitled Polymerization Catalysts and Process for Producing Bimodal Polymers in a Single Reactor, filed Aug. 19, 2005, as U.S. Appl. No. 11/208,077.
Bubeck, R.A., “Structure-property relationships in metallocene polythylenes”, Materials Science and Engineering R, vol. 39, No. 1, Sep. 15, 2002, pp. 1-28.
Search Report and Written Opinion, PCT/US06/042526, Mar. 20, 2007, 14 pgs.
Janzen, Jay, et al., “Rheological Detection of Long-Chain Branching in High-Density Polyethylenes,” Pennsylvania State University—Phllips Petroleum Company Research Center, pp. 128-129.
Arnett, Raymond L., et al., “Effect of Side Groups on Unperturbed Chain Dimensions of Atactic Hydrocarbon Polymers,” The Journal of Physical Chemistry, vol. 77, No. 16, 1973, pp. 1986-1989.
Arnett, Raymond L., et al., “Zero-Shear Viscosity of Some Ethyl Branched Paraffinic Model Polymers,” The Journal of Physical Chemistry, American Chemical Society, vol. 84, No. 6, 1980, pp. 649-652.
Randall, James C., “NMR and Macromolecules—Sequence, Dynamic, and Domain Structure,” ACS Symposium Series 247, American Chemical Society, 1984, 4 pgs.
Kajigaeshi, Shoji, et al., “Selective Preparation of Fluorene Derivatives Using the t-Butyl Function as a Positional Protective Group,” The Chemical Society of Japan, vol. 59. No. 1, Jan. 1986, pp. 97-103.
Janzen, J., et al., “Diagnosing long-chain branching in polyethylenes,” Journal of Molecular Structure, 1999, pp. 569-584 and 4 pgs.
Beigzadeh, Daryoosh, at al., “Combined metallocene catalysts: an efficient technique to manipulate long-chain branching frequency of polyethylene,” Macromol. Rapid Commun., vol. 20, No. 10, 1999, pp. 541-545.
Walter, Philipp, et al., “Short and long chain branching of polyethene prepared by means of ethene polymerization with 1-elcosene using MAO activated Me2Si(Me4Cp)(NtBu)TICI2,” Macromolecular Chemistry and Physics, vol. 201, No. 5, 2000, pp. 604-612.
Nele, Marcio, et al., “Retrofitting of Industrial Olefin Polymerization Plants: Producing Broad MWDs Through Multiobjective Periodic Operation,” Journal of Applied Polymer Science, vol. 77, 2000, pp. 437-452.
Jordens, K., et al., “The influence of molecular weight and thermal history on the thermal, rheological, and mechanical properties of metallocene-catalyzed linear polyethylenes,” Polymer, Elsevier Science, vol. 41, 2000, 7175-7192.
Sandstrum, Steve D., et al., “Relevance of ISO 9080 standard grows with HDPE gas pipe lines,” Pipe Line & Gas Industry, Dec. 2000, pp. 55-58.
Hubert, L., et al., “Physical and mechanical properties of polyethylene for pipes in relation to molecular architecture I. Microstructure and crystallisation kinetics,” Polymer, Elsevier Science, vol. 42, 2001, pp. 8425-8434.
Reb, Alexander, et al., “Diastereomeric amido functionalized ansa half-sandwich complexes of titanium and zirconium as catalyst precursors for ethylene polymerization to give resins with bimodal molecular weight distributions,” Journal of Molecular Catalysis A: Chemical, Elsevier Science, vol. 174, 2001, pp. 35-49.
Aguilar, M., et al., “New aspects on the rheological behavior of metallocene catalysed polyethylenes,” Polymer, Elsevier Science, vol. 42, 2001, pp. 9713-9721.
Robertson, Christopher G., et al., “Extent of Branching from Linear Viscoelasticity of Long-Chain-Branched Polymers,” Journal of Polymer Science: Part B: Polymer Physics, vol. 42, 2004, pp. 1671-1684.
Joseph, Sebastian, Ph.D., “Bimodal polyethylene advantages in pressure pipe applications,” Lyondell Chemical Company, International Polyolefins Conference in Houston, Feb. 28, 2006, 21 pgs.

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