Patents by Inventor Seema V. Karande
Seema V. Karande 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: 20230383058Abstract: The present disclosure provides embodiments of a tetrapolymer composition. In embodiments, the tetrapolymer composition may have the formula E/P/X/CO, which may include from 25 wt. % to 90 wt. % of ethylene (E), from 0.1 wt. % to 5.0 wt. % of propylene (P), from 5 wt. % to 40 wt. % of alkyl acrylate (X), and from 3 wt. % to 30 wt. % of carbon monoxide (CO). X may be selected from the group consisting of vinyl acetate or n-butyl acrylate. The tetrapolymer composition may have a melt index, 12, from 10 to 1,000 g/10 min when measured according to ASTM 1238 at 2.16 kg and 190 C. Additionally, the present disclosure provides embodiments of a polymer formulation comprising the tetrapolymer composition and polyvinyl chloride.Type: ApplicationFiled: October 27, 2021Publication date: November 30, 2023Applicant: Dow Global Technologies LLCInventors: Xian Jiang, Yushan Hu, Wayne C. Whelchel, Bruce M. Hasch, Hayley A. Brown, Seema V. Karande
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Patent number: 8536268Abstract: An adhesive composition comprising a copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and C4-20?-olefins, the copolymer having (i) a content of units derived from propylene of greater than about 50 mole percent, (ii) a Brookfield viscosity at 190 C from about 50 to about 100,000 cP, (iii) an MWD from about 1.5 to about 15, and (iv) containing less than about 50 ppm residual catalyst metal.Type: GrantFiled: December 21, 2005Date of Patent: September 17, 2013Assignee: Dow Global Technologies LLCInventors: Teresa P. Karjala, Patricia Ansems, Charles F. Diehl, Selim Yalvac, Cynthia L. Rickey, Seema V. Karande, Angela N. Taha
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Publication number: 20100143676Abstract: The invention includes an interlayer film and composition comprising a polymer composition obtainable from (a) at least one low crystallinity propylene polymer, and at least one (b) internal adhesion enhancer, (c) at least one clarity enhancer or (d), more preferably, both (b) and (c). The invention also includes a process of preparing a film comprising (a) supplying at least one first component, a low crystallinity propylene polymer, (b) supplying at least one second component, selected from at least one an internal adhesion enhancer, at least one clarity enhancer or a combination thereof; and, (d) admixing the first and second components and optional additives.Type: ApplicationFiled: September 17, 2007Publication date: June 10, 2010Applicant: DOW GLOBAL TECHNOLOGIES INC.Inventors: Stephen F. Hahn, Henry G. Heck, Pankaj Gupta, Steven R. Jenkins, Seema V. Karande, Shaun Parkinson, Jesus Nieto, Rajen M. Patel, Stephen J. Skapik, III
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Publication number: 20090105407Abstract: An adhesive composition comprising a copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and C4-20?-olefins, the copolymer having (i) a content of units derived from propylene of greater than about 50 mole percent, (ii) a Brookfield viscosity at 190 C from about 50 to about 100,000 cP, (iii) an MWD from about 1.5 to about 15, and (iv) containing less than about 50 ppm residual catalyst metal.Type: ApplicationFiled: December 21, 2005Publication date: April 23, 2009Inventors: Teresa P. Karjala, Patricia Ansems, Charles F. Diehl, Selim Yalvac, Cynthia L. Rickey, Seema V. Karande, Angela N. Taha
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Publication number: 20090068427Abstract: The invention is an article comprising at least two layers, a low crystallinity layer and a high crystallinity layer. One or both layers is capable of being elongated so that a pre-stretched article is capable of being formed.Type: ApplicationFiled: October 25, 2006Publication date: March 12, 2009Applicant: Dow Global Technologies Inc.Inventors: Rajen M. Patel, Andy C. Chang, Hong Peng, Seema V. Karande, Benjamin C. Poon, Yunwa Wilson Cheung
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Patent number: 7498282Abstract: The invention is an article comprising at least two layers, a low crystallinity layer and a high crystallinity layer. One or both layers is capable of being elongated so that a pre-stretched article is capable of being formed.Type: GrantFiled: October 25, 2006Date of Patent: March 3, 2009Assignee: Dow Global Technology Inc.Inventors: Rajen M. Patel, Andy C. Chang, Hong Peng, Seema V. Karande, Benjamin C. Poon, Yunwa Wilson Cheung
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Patent number: 6982311Abstract: The subject invention provides a film having at least one layer comprising an interpolymer of ethylene and at least on comonomer selected from the group consisting of C3-C20 ?-olefins, dienes, and cycloalkenes, wherein the interpolymer is characterized as having a high degree of processability, good optical performance, and good mechanical properties. The subject invention further provides film fabrication processes and polymer compositions which are useful in preparing the subject films.Type: GrantFiled: July 31, 2002Date of Patent: January 3, 2006Assignee: Dow Global Technologies, Inc.Inventors: Seema V. Karande, Lonnie G. Hazlitt, Pradeep Jain, Kaelyn Koch, Shih-Yaw Lai, Li-Min Tau
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Patent number: 6946520Abstract: This invention relates to fabricated articles, including films or sheets prepared from blends of substantially random ethylene/propylene/vinyl aromatic monomer interpolymers with propylene homopolymers or copolymers. The fabricated articles exhibit high toughness, tensile properties and heat resistance and low stress whitening, and further can exhibit desirable optical properties, especially when in the form of a film or sheet.Type: GrantFiled: February 27, 2002Date of Patent: September 20, 2005Assignee: Dow Global Technologies, Inc.Inventors: Seema V. Karande, Martin J. Guest, Satoru Moriya, Yunwa W. Cheung, Bharat I. Chaudhary, Shuichi Murakami
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Publication number: 20040077787Abstract: This invention relates to fabricated articles, including films or sheets prepared from blends of substantially random ethylene/propylene/vinyl aromatic monomer interpolymers with propylene homopolymers or copolymers. The fabricated articles exhibit high toughness, tensile properties and heat resistance and low stress whitening, and further can exhibit desirable optical properties, especially when in the form of a film or sheet.Type: ApplicationFiled: August 14, 2003Publication date: April 22, 2004Inventors: Seema V. Karande, Martin J. Guest, Satoru Moriya
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Publication number: 20030022998Abstract: The subject invention provides a film having at least one layer comprising an interpolymer of ethylene and at least on comonomer selected from the group consisting of C3-C20 &agr;-olefins, dienes, and cycloalkenes, wherein the interpolymer is characterized as having a high degree of processability, good optical performance, and good mechanical properties. The subject invention further provides film fabrication processes and polymer compositions which are useful in preparing the subject films.Type: ApplicationFiled: July 31, 2002Publication date: January 30, 2003Applicant: The Dow Chemical CompanyInventors: Seema V. Karande, Lonnie G. Hazlitt, Pradeep Jain, Kaelyn Koch, Shih-Yaw Lai, Li-Min Tau
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Patent number: 6486284Abstract: The subject invention provides a film having at least one layer comprising an interpolymer of ethylene and at least one comonomer selected from the group consisting of C3-C20 &agr;-olefins, dienes, and cycloalkenes, wherein the interpolymer is characteried as having a high degree of processability good optical performance, and good mechanical properties. The subject invention further provides film fabrication processes and polymer compositions which are useful in preparing the subject films.Type: GrantFiled: May 8, 2000Date of Patent: November 26, 2002Assignee: Dow Global Technologies Inc.Inventors: Seema V. Karande, Lonnie G. Hazlitt, Pradeep Jain, Kaelyn Koch, Shih-Yaw Lai, Li-Min Tau
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Patent number: 6325956Abstract: The invention includes a process comprising (a) forming a polymeric admixture including at least one polyolefin which has been prepared using a single site catalyst and at least a crosslinking amount of at least one poly(sulfonyl azide) crosslinking agent; (b) shaping the resulting admixture; and (c) heating the resulting shaped admixture to a temperature at least the decomposition temperature of the crosslinking agent. The steps take place in any sequence and optionally include substeps. The single site catalyst is preferably a constrained geometry or metallocene catalyst, but optionally another transition metal catalyst which is not a traditional Ziegler Natta Ti/MgCl2 catalyst such as a vanadium catalyst. The invention further includes all compositions obtainable by the process of the invention as well as all articles formed from these compositions.Type: GrantFiled: August 26, 1998Date of Patent: December 4, 2001Assignee: The Dow Chemical CompanyInventors: Bharat I. Chaudhary, Thoi H. Ho, Seema V. Karande, Che-I. Kao, Robert H. Terbrueggen, David A. Babb, Clark H. Cummins, Michael J. Mullins, H. Craig Silvis
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Patent number: 6124370Abstract: Foamed articles having enhanced tensile, elastic recovery, and creep and fatigue resistance properties are prepared using a dual cure system. This system comprises a heat or radiation-activated first stage cure (which follows or coincides with foaming) followed by a moisture-activated second stage cure. Heat-activated curing systems include peroxide, sulfur, etc., and radiation-activated cure systems include electron beam, gamma-ray, etc. Moisture-activated systems include silane, sulfonyl chloride, and the like.Type: GrantFiled: June 14, 1999Date of Patent: September 26, 2000Assignee: The Dow Chemical CompanyInventors: Kim L. Walton, Seema V. Karande
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Patent number: 6111020Abstract: Ethylene vinyl acetate (EVA)/ethylene-styrene interpolymer (ESI) blends are described that are useful in preparing foams which exhibit improved compression set resistance, dimensional stability and rebound resilience at similar foam densities than known foam systems, e.g. EVA. The cross-linked foams of this invention are particularly useful in fabricating footwear and gasket products.Type: GrantFiled: July 15, 1998Date of Patent: August 29, 2000Assignee: The Dow Chemical CompanyInventors: Steven R. Oriani, Seema V. Karande
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Patent number: 5977271Abstract: The subject invention provides a thermoset elastomer comprising a crosslinked pseudorandom or substantially random interpolymer of: (a) from 15 to 70 weight percent of at least one .alpha.-olefin, (b) from 30 to 70 weight percent of at least one vinylidene aromatic compound, and (c) from 0 to 15 weight percent of at least one diene. The subject invention further provides a thermoplastic vulcanizate comprising the thermoset elastomers of the invention as provided in a thermoplastic polyolefin matrix. The subject invention further provides processes for preparing the inventive thermoset elastomers and thermoplastic vulcanizates, as well as parts fabricated therefrom. The inventive materials have a superior balance of properties, as compared to EPM and EPDM based materials. The subject invention also pertains to foams and methods for their preparation.Type: GrantFiled: August 27, 1997Date of Patent: November 2, 1999Assignee: The Dow Chemical CompanyInventors: Kevin W. McKay, Francis J. Timmers, Edwin R. Feig, Thoi H. Ho, Seema V. Karande
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Patent number: 5911940Abstract: Foamed articles having enhanced tensile, elastic recovery, and creep and fatigue resistance properties are prepared using a dual cure system. This system comprises a heat or radiation-activated first stage cure (which follows or coincides with foaming) followed by a moisture-activated second stage cure. Heat-activated curing systems include peroxide, sulfur, etc., and radiation-activated cure systems include electron beam, gamma-ray, etc. Moisture-activated systems include silane, sulfonyl chloride, and the like.Type: GrantFiled: September 11, 1997Date of Patent: June 15, 1999Assignee: The Dow Chemical CompanyInventors: Kim L. Walton, Seema V. Karande
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Patent number: 5883188Abstract: Paintable thermoplastic polyolefin compositions are disclosed which comprise (i) about 20 to about 70 wt % of at least one graft-modified polypropylene, (ii) about 10 to about 40 wt % of at least one nongrafted or graft-modified homogeneously branched linear ethylene polymer, ethylene-propylene monomer rubber, ethylene-propylene-diene monomer rubber, heterogeneously branched linear ethylene polymer, styrene block copolymer, or a combination thereof and (iii) about 5 to about 50 wt % of an interpolymer of ethylene and an .alpha.,.beta.-unsaturated carbonyl copolymer, e.g. a copolymer of ethylene and acrylic acid. The polypropylene and, optionally the homogeneously branched linear ethylene polymer, ethylene-propylene monomer rubber, ethylene-propylene-diene monomer rubber, heterogeneously branched linear ethylene polymer, and styrene block copolymer are grafted with an unsaturated organic compound containing at least one site of ethylenic unsaturation and at least one carbonyl group, e.g. maleic anhydride.Type: GrantFiled: September 10, 1997Date of Patent: March 16, 1999Assignees: The Dow Chemical Company, Dow Europe S.A.Inventors: Yuh-Chin Hwang, Stephen R. Betso, Thomas J. McKeand, Jr., H. Craig Silvis, Deepak R. Parikh, Don J. Germano, Seema V. Karande
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Patent number: 5869591Abstract: The subject invention provides a thermoset elastomer comprising a crosslinked pseudorandom or substantially random interpolymer of: (a) from 15 to 70 weight percent of monomer units derived from at least one a-olefin, (b) from 30 to 70 weight percent of monomer units derived from at least one vinylidene aromatic compound, and (c) from 0 to 15 weight percent of monomer units derived from at least one diene. The subject invention further provides a thermoplastic vulcanizate comprising the thermoset elastomers of the invention as provided in a thermoplastic polyolefin matrix. The subject invention further provides processes for preparing the inventive thermoset elastomers and thermoplastic vulcanizates, as well as parts fabricated therefrom. The inventive materials have a superior balance of properties, as compared to EPM and EPDM based materials. The subject invention also pertains to foams and methods for their preparation.Type: GrantFiled: August 27, 1997Date of Patent: February 9, 1999Assignee: The Dow Chemical CompanyInventors: Kevin W. McKay, Francis J. Timmers, Edwin R. Feig, Thoi H. Ho, Seema V. Karande
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Patent number: 5792534Abstract: The subject invention provides a polymer mixture having high heat resistivity, low hexane extractive and controllably lower or higher modulus. The mixture is comprised of at least one first substantially linear ethylene polymer, Component (A), and at least one second ethylene polymer which is a homogeneously branched polymer, heterogeneously branched linear polymer or a non-short chain branched linear polymer. When fabricated into film, the mixture is characterized by a heat seal initiation temperature which is substantially lower than its Vicat softening point as well as a high ultimate hot tack strength. When fabricated as a molded article, the mixture is characterized by high microwave warp distortion while maintaining a lower modulus. The polymer mixture is particularly well-suited for use in multilayer film structures as a sealant layer for such applications as cook-in packages, hot-fill packages, and barrier shrink films.Type: GrantFiled: June 7, 1995Date of Patent: August 11, 1998Assignee: The Dow Chemical CompanyInventors: Jacquelyn A. deGroot, Lonnie G. Hazlitt, Pradeep Jain, Seema V. Karande, Laura K. Mergenhagen, Dan G. Moldovan, Kenneth B. Stewart, Nicole F. Whiteman
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Patent number: 5773106Abstract: The subject invention provides a polymer mixture having high heat resistivity, low hexane extractive and controllably lower or higher modulus. The mixture is comprised of at least one first substantially linear ethylene polymer, Component (A), and at least one second ethylene polymer which is a homogeneously branched polymer, heterogeneously branched linear polymer or a non-short chain branched linear polymer. When fabricated into film, the mixture is characterized by a heat seal initiation temperature which is substantially lower than its Vicat softening point as well as a high ultimate hot tack strength. When fabricated as a molded article, the mixture is characterized by high microwave warp distortion while maintaining a lower modulus. The polymer mixture is particularly well-suited for use in multilayer film structures as a sealant layer for such applications as cook-in packages, hot-fill packages, and barrier shrink films.Type: GrantFiled: June 7, 1995Date of Patent: June 30, 1998Assignee: The Dow Chemical CompanyInventors: Jacquelyn A. deGroot, Pradeep Jain, Lonnie G. Hazlitt, Seema V. Karande, Laura K. Mergenhagen, Dan G. Moldovan, Kenneth B. Stewart, Nicole F. Whiteman