Patents by Inventor Brian W. S. Kolthammer
Brian W. S. Kolthammer 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: 20090182102Abstract: The present invention relates to an ethylene/?-olefin interpolymer product comprising at least one ?-olefin interpolymerized with ethylene and, characterized in at least one aspect, as having improved properties when utilized in a hot melt adhesive formulation. The invention also relates to a process for manufacturing the interpolymer product wherein the process comprises employing two or more single site catalyst systems in at least one reaction environment (or reactor) and wherein the at least two catalyst systems have (a) different comonomer incorporation capabilities or reactivities and/or (b) different termination kinetics, both when measured under the same polymerization conditions. The interpolymer products are useful, for example, in applications such as hot melt adhesives, and also for impact, bitumen and asphalt modification, adhesives, dispersions or latexes and fabricated articles such as, but not limited to, foams, films, sheet, moldings, thermoforms, profiles and fibers.Type: ApplicationFiled: March 18, 2009Publication date: July 16, 2009Applicant: Dow Global Technologies Inc.Inventors: Teresa P. Karjala, Brian W. S. Kolthammer
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Patent number: 7531601Abstract: The present invention relates to an ethylene/?-olefin interpolymer product comprising at least one ?-olefin interpolymerized with ethylene and, characterized in at least one aspect, as having improved properties when utilized in a hot melt adhesive formulation. The invention also relates to a process for manufacturing the interpolymer product wherein the process comprises employing two or more single site catalyst systems in at least one reaction environment (or reactor) and wherein the at least two catalyst systems have (a) different comonomer incorporation capabilities or reactivities and/or (b) different termination kinetics, both when measured under the same polymerization conditions. The interpolymer products are useful, for example, in applications such as hot melt adhesives, and also for impact, bitumen and asphalt modification, adhesives, dispersions or latexes and fabricated articles such as, but not limited to, foams, films, sheet, moldings, thermoforms, profiles and fibers.Type: GrantFiled: September 17, 2004Date of Patent: May 12, 2009Assignee: Dow Global Technologies, Inc.Inventors: Teresa Karjala, Brian W. S. Kolthammer
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Patent number: 7259219Abstract: An article of manufacture comprises a copolymer of ethylene and vinyl aromatic monomer having a molecular weight of less than 15,000. Preferably, the copolymer is characterized by a backbone having a first and second terminal end group, the first terminal end group is a methyl group, the second terminal end group is a vinyl group, wherein the ratio of the terminal methyl group to the terminal vinyl group is 0.8:1 to 1:0.8. The article of manufacture includes, but is not limited to, waxes, lubricants, additives, etc. The waxes may be used to formulate paints and coatings, printing inks, carbon paper, photo toners, building and construction materials, mold release agents, hot melt adhesives, candles. The waxes may also be used in wood processing, metal working, powder metallurgy and sintering, wax modeling, sizing, crop protection, and so on.Type: GrantFiled: April 9, 2003Date of Patent: August 21, 2007Assignee: Dow Global Technologies Inc.Inventors: Robert K. Rosen, Teresa P. Karjala, Selim Yalvac, Yunwa W. Cheung, Martin J. Guest, Brian W. S. Kolthammer, Steven M. Ueligger
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Patent number: 6916883Abstract: A new process of interpolymerizing ethylene interpolymer products having improved properties, such as increased onset of crystallization temperature, is disclosed. Preferably, the process comprises interpolymerizing a first homogeneous ethylene/alpha-olefin interpolymer and at least one second homogeneous ethylene/alpha-olefin interpolymer using at least two constrained geometry catalysts having different reactivities such that the first ethylene/alpha-olefin interpolymer has a narrow molecular weight distribution (NMWD) with a very high comonomer content and relatively high molecular weight and the second ethylene/alpha-olefin interpolymer has a NMWD with a low comonomer content and a molecular weight lower than that of the first interpolymer. The resultant first homogeneous interpolymer is combined with the resultant second homogeneous interpolymer in appropriate weight ratios resulting in the desired finished polymer structure.Type: GrantFiled: September 1, 2004Date of Patent: July 12, 2005Assignee: Dow Global Technologies Inc.Inventors: Deepak R. Parikh, Brian W. S. Kolthammer, Robert S. Cardwell
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Patent number: 6747113Abstract: A polymer produced by a transition metal containing catalyst useful for the polymerization of &agr;-olefins is prepared by (A) forming in an inert atmosphere which excludes oxygen and moisture a slurry of (1) a porous inorganic oxide support material selected from the group consisting of silica, alumina, or a combination of silica and alumina, said support material containing not greater than about 5 millimoles of hydroxyl groups per gram of support material and a particle size not greater than about 10 microns and a surface area of from about 50 to about 800 m2/g in an inert organic liquid medium; (B) mixing said slurry with (2) an alkoxide and stirring the resultant mixture at a temperature of from about −20° C. to about 120° C.Type: GrantFiled: November 17, 2000Date of Patent: June 8, 2004Assignee: The Dow Chemical CompanyInventors: Lee Spencer, Miriam P. Ripplinger, Brian W. S. Kolthammer, Jeffrey J. Wooster
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Patent number: 6723810Abstract: Process for making a non-pourable ultra-low molecular weight ethylene polymer composition and blends thereof. Such polymer compositions tend to have longer lamella and a greater degree of crystalline organization than corresponding higher molecular weight materials at an equivalent density.Type: GrantFiled: December 21, 2001Date of Patent: April 20, 2004Assignee: The Dow Chemical CompanyInventors: Malcolm F. Finlayson, Craig C. Garrison, Ralph E. Guerra, Martin J. Guest, Brian W. S. Kolthammer, Deepak R. Parikh, Steven M. Ueligger
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Publication number: 20030166784Abstract: A new process of interpolymerizing ethylene interpolymer products having improved properties, such as increased onset of crystallization temperature, is disclosed. Preferably, the process comprises interpolymerizing a first homogeneous ethylene/alpha-olefin interpolymer and at least one second homogeneous ethylene/alpha-olefin interpolymer using-at least two constrained geometry catalysts having different reactivities such that the first ethylene/alpha-olefin interpolymer has a narrow molecular weight distribution (NMWD) with a very high comonomer content and relatively high molecular weight and the second ethylene/alpha-olefin interpolymer has a NMWD with a low comonomer content and a molecular weight lower than that of the first interpolymer. The resultant first homogeneous interpolymer is combined with the resultant second homogeneous interpolymer in appropriate weight ratios resulting in the desired finished polymer structure.Type: ApplicationFiled: January 20, 2003Publication date: September 4, 2003Inventors: Deepak R. Parikh, Robert S. Cardwell, Brian W. S. Kolthammer
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Publication number: 20030149181Abstract: Film, molded articles and fibers prepared from ethylene/&agr;-olefin interpolymer compositions are disclosed. The interpolymer compositions are blends prepared by combining specified amounts of a narrow molecular weight distribution, narrow composition distribution breadth index interpolymer, and a broad molecular weight distribution, broad composition distribution breadth index interpolymer, with each blend component having a specified density, melt index and degree of branching.Type: ApplicationFiled: September 6, 2002Publication date: August 7, 2003Inventors: Brian W.S. Kolthammer, Robert S. Cardwell, Ronald P. Markovich, Bharat I. Chaudhary, Adam E. Laubach, Jesus Nieto
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Patent number: 6566446Abstract: A new process of interpolymerizing ethylene interpolymer products having improved properties, such as increased onset of crystallization temperature, is disclosed. Preferably, the process comprises interpolymerizing a first homogeneous ethylene/alpha-olefin interpolymer and at least one second homogeneous ethylene/alpha-olefin interpolymer using at least two constrained geometry catalysts having different reactivities such that the first ethylene/alpha-olefin interpolymer has a narrow molecular weight distribution (NMWD) with a very high comonomer content and relatively high molecular weight and the second ethylene/alpha-olefin interpolymer has a NMWD with a low comonomer content and a molecular weight lower than that of the first interpolymer. The resultant first homogeneous interpolymer is combined with the resultant second homogeneous interpolymer in appropriate weight ratios resulting in the desired finished polymer structure.Type: GrantFiled: September 18, 1997Date of Patent: May 20, 2003Assignee: Dow Global Technologies Inc.Inventors: Deepak R. Parikh, Robert S. Cardwell, Brian W. S. Kolthammer
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Patent number: 6545088Abstract: Ethylene, an &agr;-olefin and, optionally, a diene monomer are polymerized in a process comprising the step of contacting (1) ethylene, (2) at least one C3-C20 aliphatic &agr;-olefin, (3) optionally, at least one C4-C20 diene, (4) a catalyst comprising (a) a metallocene complex, and (b) an activator, and (5) a solvent. The process is conducted in either a single reactor or in multiple reactors, the latter configured either in series or parallel. Solvent is removed from the polymer stream in an anhydrous, first stage solvent recovery operation such that the solids concentration of the product stream is increased by at least 100 percent. Additional solvent is removed in an anhydrous, second stage solvent recovery operation from the product of the first stage solvent recovery operation such that the solids concentration of the product stream is in excess of 65 weight percent.Type: GrantFiled: July 12, 1996Date of Patent: April 8, 2003Assignee: Dow Global Technologies Inc.Inventors: Brian W. S. Kolthammer, Robert S. Cardwell, Deepak R. Parikh, Morris S. Edmondson, Stanley W. Smith
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Patent number: 6538080Abstract: A gas phase fluidized bed process is described for producing ethylene polymers having improved processability and an MWD of less than about 2.9. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention which have low susceptibility to melt fracture, even under high shear stress conditions.Type: GrantFiled: February 4, 2000Date of Patent: March 25, 2003Assignee: BP Chemicals LimitedInventors: Robert D. Swindoll, Bruce A. Story, Brian W. S. Kolthammer, Kevin P. Peil, David R. Wilson, James C. Stevens
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Patent number: 6538070Abstract: A new process of interpolymerizing ethylene interpolymer products having improved properties, such as increased onset of crystallization temperature, is disclosed. Preferably, the process comprises interpolymerizing a first homogeneous ethylene/alpha-olefin interpolymer and at least one second homogeneous ethylene/alpha-olefin interpolymer using at least two constrained geometry catalysts having different reactivities such that the first ethylene/alpha-olefin interpolymer has a narrow molecular weight distribution (NMWD) with a very high comonomer content and relatively high molecular weight and the second ethylene/alpha-olefin interpolymer has a NMWD with a low comonomer content and a molecular weight lower than that of the first interpolymer. The resultant first homogeneous interpolymer is combined with the resultant second homogeneous interpolymer in appropriate weight ratios resulting in the desired finished polymer structure.Type: GrantFiled: May 19, 1997Date of Patent: March 25, 2003Assignee: Dow Global Technologies Inc.Inventors: Robert S. Cardwell, Brian W. S. Kolthammer, Deepak R. Parikh
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Publication number: 20020156222Abstract: The subject invention pertains to a non-pourable homogeneous ultra-low molecular weight ethylene polymer composition and a process for the preparation thereof. Such polymer compositions have longer lamella and a greater degree of crystalline organization than corresponding higher molecular weight materials at an equivalent density.Type: ApplicationFiled: December 21, 2001Publication date: October 24, 2002Inventors: Malcolm F. Finlayson, Ralph E. Guerra, Craig C. Garrison, Martin J. Guest, Brian W. S. Kolthammer, Steven M. Ueligger, Deepak R. Parikh
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Patent number: 6448341Abstract: Film, molded articles and fibers prepared from ethylene/&agr;-olefin interpolymer compositions are disclosed. The interpolymer compositions are blends prepared by combining specified amounts of a narrow molecular weight distribution, narrow composition distribution breadth index interpolymer, and a broad molecular weight distribution, broad composition distribution breadth index interpolymer, with each blend component having a specified density, melt index and degree of branching.Type: GrantFiled: August 24, 2000Date of Patent: September 10, 2002Assignee: The Dow Chemical CompanyInventors: Brian W. S. Kolthammer, Robert S. Cardwell, Ronald P. Markovich, Bharat I. Chaudhary, Adam E. Laubach, Jesus Nieto
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Patent number: 6335410Abstract: The subject invention pertains to a non-pourable homogeneous ultra-low molecular weight ethylene polymer composition and a process for the preparation thereof Such polymer compositions have longer lamella and a greater degree of crystalline organization than corresponding higher molecular weight materials at an equivalent density.Type: GrantFiled: July 22, 1999Date of Patent: January 1, 2002Assignee: The Dow Chemical CompanyInventors: Malcolm F. Finlayson, Ralph E. Guerra, Craig C. Garrison, Martin J. Guest, Brian W. S. Kolthammer, Steven M. Ueligger, Deepak R. Parikh
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Patent number: 6172173Abstract: A polymer produced by a transition metal containing catalyst useful for the polymerization of &agr;-olefins is prepared by (A) forming in an inert atmosphere which excludes oxygen and moisture a slurry of (1) a porous inorganic oxide support material selected from the group consisting of silica, alumina, or a combination of silica and alumina, said support material containing not greater than about 5 millimoles of hydroxyl groups per gram of support material and a particle size not greater than about 10 microns and a surface area of from about 50 to about 800 m2/g in an inert organic liquid medium; (B) mixing said slurry with (2) an alkoxide and stirring the resultant mixture at a temperature of from about −20° C. to about 120° C.Type: GrantFiled: October 8, 1997Date of Patent: January 9, 2001Assignee: The Dow Chemical CompanyInventors: Lee Spencer, Brian W. S. Kolthammer, Miriam P. Ripplinger, Jeffrey J. Wooster, Pak-Wing S. Chum, Jacquelyn A. deGroot
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Patent number: 6054544Abstract: The subject invention pertains to a non-pourable homogeneous ultra-low molecular weight ethylene polymer composition and a process for the preparation thereof. Such polymer compositions have longer lamella and a greater degree of crystalline organization than corresponding higher molecular weight materials at an equivalent density.Type: GrantFiled: January 22, 1997Date of Patent: April 25, 2000Assignee: The Dow Chemical CompanyInventors: Malcolm F. Finlayson, Craig C. Garrison, Ralph E. Guerra, Martin J. Guest, Brian W. S. Kolthammer, Deepak R. Parikh, Steven M. Ueligger
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Patent number: 6034022Abstract: Group 4 metal constrained geometry complexes comprising a fused ring indenyl derivative ligand, catalytic derivatives thereof, processes for preparing the same and their use as components of olefin polymerization catalysts are disclosed.Type: GrantFiled: June 3, 1999Date of Patent: March 7, 2000Assignee: The Dow Chemical CompanyInventors: Mark H. McAdon, Jasson T. Patton, Peter N. Nickias, Ravi B. Shankar, Francis J. Timmers, Brian W. S. Kolthammer, Daniel D. VanderLende, Steven M. Ueligger
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Patent number: 6025448Abstract: A gas phase fluidized bed process is described for producing ethylene polymers having improved processability and an MWD of less than about 2.9. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention which have low susceptibility to melt fracture, even under high shear stress conditions.Type: GrantFiled: June 3, 1996Date of Patent: February 15, 2000Assignee: The Dow Chemical CompanyInventors: Robert D. Swindoll, Bruce A. Story, Brian W. S. Kolthammer, Kevin P. Peil, David R. Wilson, James C. Stevens
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Patent number: 5869575Abstract: Processes for polymerizing ethylene/.alpha.-olefin interpolymer compositions are disclosed. The interpolymer compositions have a controlled composition and a controlled molecular weight distribution. The processes utilize a highly-efficient homogeneous catalyst composition in at least one reactor to produce a first interpolymer having a narrow composition distribution and a narrow molecular weight distribution, and a highly-efficient heterogeneous Ziegler catalyst in at least one other reactor. The reactors can be operated sequentially or separately, depending upon the desired product. The novel compositions have good optical properties (e.g., clarity and haze) and good physical properties (e.g., modulus, yield strength, toughness and tear). Useful products which can be formed from these compositions include film, molded articles and fiber.Type: GrantFiled: November 24, 1997Date of Patent: February 9, 1999Assignee: The Dow Chemical CompanyInventors: Brian W. S. Kolthammer, Robert S. Cardwell