Patents by Inventor Kalyan Sehanobish
Kalyan Sehanobish 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).
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Publication number: 20070082191Abstract: Stretch films which exhibit good puncture and impact resistance while also exhibiting resistance to defect propagation are desired. The films of the present invention have an ultimate stretch of at least 200 percent, a dart impact strength of at least about 700 gms/mil and a catastrophic failure stretch of at least 95 percent of the elongation to break value (CF of 5 or less). The films preferably comprise at least 3 layers and preferably comprise at least 50 percent by weight of polyethylene polymers.Type: ApplicationFiled: November 29, 2004Publication date: April 12, 2007Inventors: Wenbin Liang, David Ramsey, Staci DeKunder, Kalyan Sehanobish, Jesus Nieto, John Presa, Shaun Pirtle
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Publication number: 20070021567Abstract: The invention relates to a polyethylene composition with a bimodal molecular weight distribution, methods for making the same, and articles made therefrom, such as high topload blow moldings and transmission and distribution pipes. The composition comprises a low-molecular-weight (LMW) ethylene homopolymer component and a homogeneous, high-molecular-weight (HMW) ethylene interpolymer component, wherein the LMW component is characterized as having a molecular weight distribution, MWDL, of less than about 8. In some embodiments, the HMW component is characterized by a reverse comonomer distribution.Type: ApplicationFiled: June 30, 2006Publication date: January 25, 2007Applicant: Dow Global Technologies Inc.Inventors: Jozef Van Dun, Peter van den Berghe, Patrick Schouterden, Ruddy Nicasy, Johan Vanvoorden, Frederik Gemoets, Kalyan Sehanobish, Noorallah Jivraj, Ravi Dixit
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Publication number: 20060266476Abstract: A method to join a substrate to an object is disclosed using a curable one or two part adhesive composition comprising an effective amount of a stabilized organoborane amine complex initiator and one or more monomers, oligomers, polymers or mixtures thereof having olefinic unsaturation which is capable of polymerization by free radical polymerization.Type: ApplicationFiled: August 13, 2004Publication date: November 30, 2006Inventors: Kalyan Sehanobish, Daniel Falla, Shaofu Wu, Mark Sonnenschein
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Patent number: 7129296Abstract: The invention relates to a polyethylene composition with a bimodal molecular weight distribution and articles made therefrom. The composition comprises a low-molecular-weight (LMW) ethylene homopolymer component and a homogeneous, high-molecular-weight (LMW) ethylene interpolymer component, wherein the LMW component is characterized as having a molecular weight distribution, MWDL, of less than about 8. In some embodiments, the HMW component is characterized by a reverse comonomer distribution.Type: GrantFiled: April 2, 2004Date of Patent: October 31, 2006Assignee: Dow Global Technologies Inc.Inventors: Jozef J. Van Dun, Patrick J. Schouterden, Kalyan Sehanobish, Peter F. M. van den Berghen, Noorallah Jivraj, Ruddy Nicasy, Johan Vanvoorden, Ravi S. Dixit, Frederik E. Gemoets
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Patent number: 6812289Abstract: This invention relates to cast films prepared from interpolymer compositions comprising; (A) a substantially linear ethylene/&agr;-olefin interpolymer present in the composition in an amount of from about 10 to about 100% by weight based on the combined weight of Components A and B; and (B) a heterogeneous interpolymer present in the composition in an amount of from about 0 to about 90% by weight based on the combined weight of Components A and B; and wherein said interpolymer composition has an I10/I2 value of < about 10.0 and is characterized as having a viscosity at 100 rad/s and a relaxation time (&tgr;) which satisfies either of the following relationships; Log(viscosity at 100 rad/s)≦4.43−0.8 log(I2) or log(&tgr;)>−1.2−1.3* log(I2) The interpolymer compositions are useful in cast stretch film manufacture with the resulting cast films having an excellent balance of strength and processability.Type: GrantFiled: July 22, 2002Date of Patent: November 2, 2004Assignee: Dow Global Technologies Inc.Inventors: Jozef J. I. Van Dun, Jacquelyn A. deGroot, Pradeep Jain, Kalyan Sehanobish, Pak-Wing S. Chum
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Publication number: 20040198911Abstract: The invention relates to a polyethylene composition with a bimodal molecular weight distribution and articles made therefrom. The composition comprises a low-molecular-weight (LMW) ethylene homopolymer component and a homogeneous, high-molecular-weight (HMW) ethylene interpolymer component, wherein the LMW component is characterized as having a molecular weight distribution, MWDL, of less than about 8. In some embodiments, the HMW component is characterized by a reverse comonomer distribution.Type: ApplicationFiled: April 2, 2004Publication date: October 7, 2004Inventors: Jozef J. Van Dun, Patrick J. Schouterden, Kalyan Sehanobish, Peter F. M. van den Berghen, Noorallah Jivraj, Ruddy Nicasy, Johan Vanvoorden, Ravi S. Dixit, Frederik E. Gemoets
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Patent number: 6787608Abstract: The invention relates to a polyethylene composition with a bimodal molecular weight distribution and articles made therefrom, such as high topload blow moldings and transmission and distribution pipes. The composition comprises a low-molecular-weight (LMW) ethylene homopolymer component and a homogeneous, high-molecular-weight (HMW) ethylene interpolymer component, wherein the LMW component is characterized as having a molecular weight distribution, MWDL, of less than about 8. The composition is characterized as having a bimodal molecular weight distribution, and a ductile-brittle transition temperature, Tdb, of less than −20° C. In some embodiments, the HMW component is characterized by a reverse comonomer distribution.Type: GrantFiled: August 16, 2002Date of Patent: September 7, 2004Assignee: Dow Global Technologies, Inc.Inventors: Jozef J. VanDun, Patrick J. Schouterden, Peter F. M. van den Berghe, Ruddy Nicasy, Johan Vanveorden, Frederick E. L. Gemoets, Kalyan Sehanobish, Noorallah Jivraj, Ravi S. Dixit
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Publication number: 20040038022Abstract: This invention relates to a method of making a film-fabric composite (includinng a film-fabric laminate) wherein the fabric is characterized as having improved tensile elongation (without rupture). In particular, the invention pertains to a method of making a film-fabric laminate having structual elastic-like behavior wherein the fabric is a nonwoven thermally bonded fabric characterized as having improved high strain rate tensile elongation and comprises a plurality of fibers comprised of at least one polypropylene polymer and at least one ethylene polymer, wherein the method comprises stretching the laminate at a high strain rate. The improved farbic is characterized by higher high strain rate tensile properties and a broader bond window which is also shifted to substantially lower temperatures with regard to maximum tensile properties.Type: ApplicationFiled: September 27, 2002Publication date: February 26, 2004Inventors: Rexford A. Maugans, Kalyan Sehanobish, Michael E. Rowland, Ray A. Herring, John Kaarto, Kenneth E. Springs, Thoi H. Ho
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Publication number: 20030215655Abstract: Improved multi-layer coextruded blow-molded objects (such as fuel containers) having at least a barrier layer and a support layer are disclosed together with improved methods for preparing such objects. The barrier layer includes an amount of modified polyolefin having approximately the same density as the support layer, wherein the modified polyolefin is prepared by grafting an unsaturated carboxylic acid or a derivative thereof to the polyolefin, the modified polyolefin being added in an amount such that the gas-barrier layer sufficiently adheres to the adjacent layer and such that the gas barrier properties of the fabricated article are still adequate. The present invention also relates to modification of the rheology of base resins, such as PET (a preferred material for the barrier layer), so that they more closely match the rheology of high density polyethylene (a preferred material for the support layer).Type: ApplicationFiled: November 1, 2002Publication date: November 20, 2003Inventors: Mark A. Barger, Joseph A. Schomaker, Ravi Ramanathan, Malcolm F. Finlayson, Chuiwah A. Cheung, Kalyan Sehanobish
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Publication number: 20030149180Abstract: The invention relates to a polyethylene composition with a bimodal molecular weight distribution and articles made therefrom, such as high topload blow moldings and transmission and distribution pipes. The composition comprises a low-molecular-weight (LMW) ethylene homopolymer component and a homogeneous, high-molecular-weight (HMW) ethylene interpolymer component, wherein the LMW component is characterized as having a molecular weight distribution, MWDL, of less than about 8. The composition is characterized as having a bimodal molecular weight distribution, and a ductile-brittle transition temperature, Tdb, of less than −20° C. In some embodiments, the HMW component is characterized by a reverse comonomer distribution.Type: ApplicationFiled: August 16, 2002Publication date: August 7, 2003Applicant: Dow Global Technologies Inc.Inventors: Jozef J. Van Dun, Patrick J. Schouterden, Kalyan Sehanobish, Peter F.M. van den Berghe, Noorallah Jivraj, Johan Vanvoorden, Ravi S. Dixit, Ruddy Nicasy, Frederik E.L. Gemoets
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Publication number: 20030114595Abstract: This invention relates to cast films prepared from interpolymer compositions comprising;Type: ApplicationFiled: July 22, 2002Publication date: June 19, 2003Inventors: Jozef J.I. Van Dun, Jacquelyn A. deGroot, Pradeep Jain, Kalyan Sehanobish, Pak-Wing S. Chum
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Patent number: 6451916Abstract: The present invention pertains to a continuous process and polymerization system characterized by separate injection of catalyst and make-up feed, an ethylene interpolymer composition characterized as having broad molecular weight distribution (MWD) and optimized compositional uniformity, a process for making such a composition and a fabricated article made from such composition. The novel composition is characterized as having a melt flow ratio, I10/I2, from 8 to 30, a Mw/Mn of greater than 4 as determined by gel permeation chromatography, a melt index, I2, from 0.01 to 1000 grams/10 minutes, preferably greater that 0.1 to 10 grams/10 minutes, and a density less than 0.945 g/cm3. The novel composition exhibits good processibility and improved toughness properties, especially excellent film tear and impact resistance, and is particularly well-suited for use in applications such as high performance trash can liners and heavy duty shipping bags.Type: GrantFiled: August 31, 2001Date of Patent: September 17, 2002Assignee: The Dow Chemical Company MidlandInventors: Kenneth W. Anderson, Pak-Wing S. Chum, David A. Eversdyk, Lonnie G. Hazlitt, Pradeep Jain, Kalyan Sehanobish, Li-Min Tau
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Patent number: 6319989Abstract: The present invention pertains to a continuous process and polymerization system characterized by separate injection of catalyst and make-up feed, an ethylene interpolymer composition characterized as having broad molecular weight distribution (MWD) and optimized compositional uniformity, a process for making such a compostion and a fabricated article made from such composition. The novel composition is characterized as having a melt flow ratio, I10/I2, from 8 to 30, a Mw/Mn of greater than 4 as determined by gel permeation chromatography, a melt index, I2, from 0.01 to 1000 grams/10 minutes, preferably greater that 0.1 to 10 grams/10 minutes, and a density less than 0.945 g/cm3. The novel composition exhibits good processibility and improved toughness properties, especially excellent film tear and impact resistance, and is particularly well-suited for use in applications such as high performance trash can liners and heavy duty shipping bags.Type: GrantFiled: January 20, 2000Date of Patent: November 20, 2001Assignee: The Dow Chemical CompanyInventors: Kenneth W. Anderson, Pak-Wing S. Chum, David A. Eversdyk, Lonnie G. Hazlitt, Pradeep Jain, Kalyan Sehanobish, Li-Min Tau
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Patent number: 6300419Abstract: Disclosed are propylene polymer compositions comprising a high crystalline propylene polymer, a substantially linear ethylene polymer, linear ethylene polymer or combinations thereof, an optional filler and an optional additional polymer. Said propylene polymer compositions have improved processability with a good balance of stillness and toughness which demonstrates improved scratch resistance in injection molded articles.Type: GrantFiled: December 8, 1999Date of Patent: October 9, 2001Assignee: The Dow Chemical CompanyInventors: Kalyan Sehanobish, Harry Craig Silvis, Marie L. Hare, Wendy D. Hoenig, John Newton
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Patent number: 6300398Abstract: The subject invention is directed to polymer compositions which comprise a homogeneous ethylene/&agr;-olefin interpolymer, a wax and a nucleating agent, wherein the nucleating agent is provided in an effective amount such that the percent elongation at break of the polymer composition is at least about fifty percent greater than the percent elongation at break of a comparative composition which lacks the nucleating agent. The polymer compositions of the invention will find utility in applications r equiring high elongation at break, while maintaining a high onset of crystallization temperature, such as in the high-speed coating of fabrics, carpet backing, floor tile and sheeting, and adhesives.Type: GrantFiled: April 14, 1998Date of Patent: October 9, 2001Assignee: The Dow Chemical CompanyInventors: Gary Lee Jialanella, Thomas J. McKeand, Jr., Kalyan Sehanobish
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Patent number: 6239217Abstract: A composition of matter comprising: A) from 25 to 90 parts by weight of a syndiotactic, vinylaromatic polymer, B) from 5 to 30 parts by weight of an oil extended, elastomeric polyolefin; C) from 1 to 10 parts by weight of a compatibilizer comprising a styrene containing block copolymer or a hydrogenated derivative thereof; D) from 0 to 25 parts by weight of a domain forming rubbery polymer comprising a styrene/conjugated diene triblock copolymer or a hydrogenated derivative thereof; E) from 0 to 5 parts by weight of a nucleator for the syndiotactic, vinylaromatic thermoplastic resin, F) from 0 to 60 parts by weight of a reinforcing agent, and G) from 0 to 90 parts by weight of a polyarylene ether or polar group modified polyarylene ether.Type: GrantFiled: September 21, 1999Date of Patent: May 29, 2001Assignee: The Dow Chemical CompanyInventors: David H. Bank, John M. Warakomski, Shaofu Wu, Kalyan Sehanobish
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Patent number: 6140420Abstract: Melt processible thermoplastic compositions and method for making them are described, these compositions comprising a thermoplastic polymer resin matrix selected from the group consisting of thermoplastic polyurethanes, polyvinyl chlorides, styrenics, engineering thermoplastics, and polyolefins, at least about 25 percent (by weight based on the total composition) of an elastomeric impact modifier dispersed as discrete particles in the thermoplastic matrix (a); and at least about 10 percent (by weight based on the total composition) of at least one homogeneous linear or substantially linear ethylene polymer dispersed as discrete particles in at least the impact modifier (b), the ethylene polymer having a molecular weight distribution less than 3.5 and a density of at least 0.04 g/cm.sup.3 higher than the density of the impact modifier component (b), wherein the elastic modulus of the thermoplastic component (a) is at least 200 times greater than the elastic modulus of the impact modifier component (b).Type: GrantFiled: December 1, 1998Date of Patent: October 31, 2000Assignee: The Dow Chemical CompanyInventors: Kalyan Sehanobish, Larry A. Meiske, Shaofu Wu, Pak-Wing Steve Chum
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Patent number: 6120887Abstract: This invention relates to a non-contact coating method for producing a continuous coating and articles constructed therefrom. This invention further relates to a method for producing a textile material with a moisture-impermeable barrier layer and to a method for producing a moisture-absorbing article of hygiene which has such a barrier layer. This invention particularly relates to a textile material and hygienic disposable articles comprising a body fluid impermeable barrier layer which can be produced from a non-contact coating method. Preferably, the thermoplastic composition used for producing the barrier layer exhibits certain rheological characteristics and comprises at least one homogeneous linear or substantially linear interpolymer of ethylene with at least one C.sub.3 -C.sub.20 alpha-olefin, further characterized by each said interpolymer having a polydispersity less than about 2.5.Type: GrantFiled: August 29, 1996Date of Patent: September 19, 2000Assignee: H. B. Fuller Licensing & Financing, Inc.Inventors: Harald Werenicz, Thomas Wittkopf, Gerhard Voss, Peter Remmers, Mark G. Katsaros, Robert G. Polance, II, Mark S. Kroll, Wendy Hoenig, Selim Yalvac, Kalyan Sehanobish, Teresa Karjala, Deepak Parikh, David C. Kelley
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Patent number: 5861463Abstract: Melt processible thermoplastic compositions and method for making them are described, these compositions comprising a) a polypropylene matrix, b) at least about 25 percent (by weight based on the total composition) of an elastomeric impact modifier dispersed as discrete particles in the polypropylene matrix (a); and c) at least about 10 percent (by weight based on the total composition) of at least one homogeneous linear or substantially linear ethylene polymer dispersed as discrete particles in at least the impact modifier (b), the ethylene polymer having a molecular weight distribution less than 3.5 and a density of at least 0.04 g/cm.sup.3 higher than the density of the impact modifier component (b), wherein the elastic modulus of the polypropylene (a) is at least 200 times greater than the elastic modulus of the impact modifier component (b).These thermoplastic compositions have improved processability. Processes for fabricating articles from them are described.Type: GrantFiled: October 31, 1996Date of Patent: January 19, 1999Assignee: The Dow Chemical CompanyInventors: Kalyan Sehanobish, Shaofu Wu, Larry A. Meiske, Pak-Wing Steve Chum