Patents by Inventor Swapnil B. Chandak
Swapnil B. Chandak 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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Patent number: 11827725Abstract: A bimodal polyethylene composition, products made therefrom, methods of making and using same, and articles, including bottle caps and closures, containing same.Type: GrantFiled: March 22, 2019Date of Patent: November 28, 2023Assignee: Univation Technologies LLCInventors: Nitin Borse, Swapnil B. Chandak, Yi Zhang, Timothy R. Lynn, Roger L Kuhlman, John F. Szul
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Patent number: 11649301Abstract: An activator-nucleator formulation comprising an activating effective amount of (A) an alkylaluminum(chloride) compound (compound (A)); and a nucleating effective amount of a compound (B) selected from at least one of compounds (B1) to (B3): (B1) calcium (1R,2S)-cis-cyclohexane-1,2-dicarboxylate (1:1); (B2) calcium stearate (1:2), and (B3) zinc stearate (1:2); wherein the compound (A) is effective for activating a Ziegler-Natta procatalyst to give a Ziegler-Natta catalyst; and wherein the compound (B) is effective for lowering isothermal crystallization peak time period of a semicrystalline polyethylene polymer made in a polymerization process by the Ziegler-Natta catalyst. A method of polymerizing ethylene, and optionally 0, 1, or more alpha-olefin comonomers, in a polymerization process conducted in a polymerization reactor, the method comprising contacting ethylene, and optionally 0, 1, or more alpha-olefin comonomers, with the Ziegler-Natta catalyst system to give a semicrystalline polyethylene polymer.Type: GrantFiled: June 7, 2019Date of Patent: May 16, 2023Assignee: Dow Global Technologies LLCInventors: Nitin Borse, Zhenshuo Bobby Liu, Ian M. Munro, Swapnil B. Chandak
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Publication number: 20230146068Abstract: Provided are bimodal linear low density polyethylene copolymers (B-LLDPE copolymers) that have a combination of improved properties comprising at least one processability characteristic similar or better than that of an unblended monomodal ZN-LLDPE and a dart impact property similar or better than that of an unblended monomodal MCN-LLDPE. For the various aspects, the B-LLDPE copolymer has a density from 0.8900 to 0.9300 g/cm3; a melt index (I2) from 0.1 g/10 min. to 5 g/10 min.; a Mz from 600,000 to 1,200,000 g/mol; and a hexane extractables content present in a value of up to 2.6 wt. % as measured according to ASTM D-5227:95. The B-LLDPE copolymer can be further characterized by a first melt flow ratio (I21/I2) from 25 to 65 and a first molecular weight ratio (Mz/Mw) from 3.5 to 5.5.Type: ApplicationFiled: March 30, 2021Publication date: May 11, 2023Applicant: Dow Global Technologies LLCInventors: Swapnil B. Chandak, Nitin K. Borse, Roger L. Kuhlman, John F. Szul
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Publication number: 20230127331Abstract: Provided are bimodal linear low density polyethylene copolymers (B-LLDPE copolymers) that have a combination of improved properties comprising at least one processability characteristic similar or better than that of an unblended monomodal ZN-LLDPE and a dart impact property similar or better than that of an unblended monomodal MCN-LLDPE. For the various aspects, the B-LLDPE copolymer has a density from 0.8900 to 0.9300 g/cm3; a melt index (I2) from 0.1 g/10 min. to 5 g/10 min.; a Mz from 600,000 to 1,900,000 g/mol; and a SHI from 5.35 to 75 ?*(1.0)/?*(100). The B-LLDPE copolymer can be further characterized by a first melt flow ratio (I21/I2) from 32 to 140 and a first molecular weight ratio (Mz/Mw) from 4.5 to 11.Type: ApplicationFiled: March 30, 2021Publication date: April 27, 2023Applicant: Dow Global Technologies LLCInventors: Swapnil B. Chandak, Nitin K. Borse, Roger L. Kuhlman, John F. Szul
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Patent number: 11485802Abstract: A spray-dried zirconocene catalyst system comprising a zirconocene catalyst and a hydrophobic fumed silica, which supports the zirconocene catalyst. A spray-drying method of making same. Polyolefins; methods of making and using same; and articles containing same.Type: GrantFiled: March 22, 2019Date of Patent: November 1, 2022Assignee: Dow Global Technologies LLCInventors: Wesley R. Mariott, Roger L. Kuhlman, Phuong A. Cao, C. Dale Lester, Chuan He, Swapnil B. Chandak, Pradeep Jain, John F. Szul
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Publication number: 20220325083Abstract: A nucleating agent-free and LLDPE-free polyolefin composition for making films with enhanced barrier properties against water vapor and oxygen gas. Related aspects include formulations, manufactured articles, films, and methods.Type: ApplicationFiled: September 22, 2020Publication date: October 13, 2022Inventors: Nitin Borse, Swapnil B. Chandak, Ayush A. Bafna, Roger L. Kuhlman, Joel D. Wieliczko, John F. Szul, Chuan C. He, Charles D. Lester
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Patent number: 11421100Abstract: A polyethylene blend comprising a uniform dispersion of constituents (A) and (B): (A) a Ziegler-Natta catalyst-made linear low density polyethylene and (B) a metallocene catalyst-made linear low density polyethylene, a composition comprising the polyethylene blend and at least one additive, methods of making and using same, and manufactured articles and films comprising or made from same.Type: GrantFiled: May 29, 2018Date of Patent: August 23, 2022Assignee: UNIVATION TECHNOLOGIES, LLC.Inventors: Swapnil B. Chandak, Nitin Borse
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Publication number: 20220213302Abstract: A polyethylene blend that has an improved stretch break property and is useful for stretch wrap film applications. The polyethylene blend consists essentially of approximately 98 weight percent (wt %) of a linear low-density polyethylene (LLDPE) component and approximately 2 wt % of a higher molecular weight high-density polyethylene polymer (HMW HDPE) component, based on the combined weight of the LLDPE and HMW HDPE components. Also, a method of making the polyethylene blend, a formulation comprising the polyethylene blend and at least one additive that is different than the polyethylene blend, a method of making a manufactured article from the polyethylene blend or formulation; the manufactured article made thereby, and use of the polyethylene blend for stretch wrapping object(s) in need thereof.Type: ApplicationFiled: May 28, 2020Publication date: July 7, 2022Inventors: Nitin Borse, Swapnil B. Chandak
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Patent number: 11299609Abstract: A polyethylene blend comprising a uniform dispersion of constituents (A) and (B): (A) a Ziegler-Natta catalyst-made linear low density polyethylene and (B) a metallocene catalyst-made linear low density polyethylene, a composition comprising the polyethylene blend and at least one additive, methods of making and using same, and manufactured articles and films comprising or made from same.Type: GrantFiled: May 29, 2018Date of Patent: April 12, 2022Assignee: Univation Technologies, LLCInventors: Swapnil B. Chandak, Nitin Borse
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Patent number: 11142597Abstract: A bimodal linear polyethylene composition, products made therefrom, methods of making and using same, and articles containing same.Type: GrantFiled: October 25, 2017Date of Patent: October 12, 2021Assignee: Univation Technologies, LLCInventors: Swapnil B. Chandak, Nitin Borse, Ayush A. Bafna, Yi Zhang, Timothy R. Lynn, Roger L. Kuhlman, John F. Szul
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Patent number: 11142600Abstract: An ethylene/1-hexene copolymer has a density from 0.9541 to 0.9600 gram per cubic centimeter (g/cm3), a molecular mass dispersity (DM=Mw/Mn) from greater than 2.0 to 3.5; and a Z-average molecular weight (Mz) from 120,000 to 240,000 grams per mole (g/mol). Methods of making and using same. Articles containing same.Type: GrantFiled: March 11, 2019Date of Patent: October 12, 2021Assignee: Univation Technologies, LLCInventors: Swapnil B. Chandak, Peter S. Martin, Yi Zhang
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Patent number: 11040523Abstract: A multilayer blown film having an inner layer, a first outer layer, and a second outer layer, wherein the inner layer comprises an ethylene-based polymer having a MWCDI value greater than 0.9, and a melt index ratio (I10/I2) that meets the following equation: I10/I2?7.0?1.2×log (I2); and the first outer layer and the second outer layer independently comprise a polyethylene composition which comprises the reaction product of ethylene and, optionally, one or more alpha olefin comonomers, wherein the polyethylene composition is characterized by the following properties: (a) a melt index, I2, of from 0.1 to 2.0 g/10 min; (b) a density of from 0.910 to 0.930 g/cc; (c) a melt flow ratio, I10/I2, of from 6.0 to 7.6; and (d) a molecular weight distribution, (Mw/Mn) of from 2.5 to 4.0.Type: GrantFiled: August 30, 2017Date of Patent: June 22, 2021Assignee: Dow Global Technologies LLCInventors: Jose Eduardo Ruiz, Fawzi G. Hamad, Mustafa Bilgen, Claudia Hernandez, Swapnil B. Chandak, Jason C. Brodil
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Publication number: 20210163633Abstract: An activator-nucleator formulation comprising an activating effective amount of (A) an alkylaluminum(chloride) compound (compound (A)); and a nucleating effective amount of a compound (B) selected from at least one of compounds (B1) to (B3): (B1) calcium (1R,2S)-cis-cyclohexane-1,2-dicarboxylate (1:1); (B2) calcium stearate (1:2), and (B3) zinc stearate (1:2); wherein the compound (A) is effective for activating a Ziegler-Naha procatalyst to give a Ziegler-Natta catalyst; and wherein the compound (B) is effective for lowering isothermal crystallization peak time period of a semicrystalline polyethylene polymer made in a polymerization process by the Ziegler-Natta catalyst. A method of polymerizing ethylene, and optionally 0, 1, or more alpha-olefin comonomers, in a polymerization process conducted in a polymerization reactor, the method comprising contacting ethylene, and optionally 0, 1, or more alpha-olefin comonomers, with the Ziegler-Naha catalyst system to give a semicrystalline polyethylene polymer.Type: ApplicationFiled: June 7, 2019Publication date: June 3, 2021Inventors: Nitin Borse, Zhenshuo Bobby Liu, Ian M. Munro, Swapnil B. Chandak
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Publication number: 20210147658Abstract: A carbon black-containing bimodal polyethylene composition, products made therefrom, methods of making and using same, and articles containing same.Type: ApplicationFiled: September 6, 2018Publication date: May 20, 2021Applicant: Dow Global Technologies LLCInventors: Nitin Borse, Swapnil B. Chandak, Yi Zhang, Timothy R. Lynn, Roger L. Kuhlman, John F. Szul
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Publication number: 20210040249Abstract: A bimodal polyethylene composition, products made therefrom, methods of making and using same, and articles, including bottle caps and closures, containing same.Type: ApplicationFiled: March 22, 2019Publication date: February 11, 2021Inventors: Nitin Borse, Swapnil B. Chandak, Yi Zhang, Timothy R. Lynn, Roger L. Kuhlman, John F. Szul
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Publication number: 20210032377Abstract: A spray-dried zirconocene catalyst system comprising a zirconocene catalyst and a hydrophobic fumed silica, which supports the zirconocene catalyst. A spray-drying method of making same. Polyolefins; methods of making and using same; and articles containing same.Type: ApplicationFiled: March 22, 2019Publication date: February 4, 2021Inventors: Wesley R. Mariott, Roger L. Kuhlman, Phuong A. Cao, C. Dale Lester, Chuan He, Swapnil B. Chandak, Pradeep Jain, John F. Szul
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Publication number: 20200399407Abstract: An ethylene/1-hexene copolymer has a density from 0.9541 to 0.9600 gram per cubic centimeter (g/cm3), a molecular mass dispersity (ÐM=Mw/Mn) from greater than 2.0 to 3.5; and a Z-average molecular weight (Mz) from 120,000 to 240,000 grams per mole (g/mol). Methods of making and using same. Articles containing same.Type: ApplicationFiled: March 11, 2019Publication date: December 24, 2020Inventors: Swapnil B. Chandak, Peter S. Martin, Yi Zhang
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Publication number: 20200231791Abstract: A polyethylene blend comprising a uniform dispersion of constituents (A) and (B): (A) a Ziegler-Natta catalyst-made linear low density polyethylene and (B) a metallocene catalyst-made linear low density polyethylene, a composition comprising the polyethylene blend and at least one additive, methods of making and using same, and manufactured articles and films comprising or made from same.Type: ApplicationFiled: April 6, 2020Publication date: July 23, 2020Inventors: Swapnil B. Chandak, Nitin Borse
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Publication number: 20200095407Abstract: A polyethylene blend comprising a uniform dispersion of constituents (A) and (B): (A) a Ziegler-Natta catalyst-made linear low density polyethylene and (B) a metallocene catalyst-made linear low density polyethylene, a composition comprising the polyethylene blend and at least one additive, methods of making and using same, and manufactured articles and films comprising or made from same.Type: ApplicationFiled: May 29, 2018Publication date: March 26, 2020Inventors: Swapnil B. Chandak, Nitin Borse
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Publication number: 20190256629Abstract: A bimodal linear polyethylene composition, products made therefrom, methods of making and using same, and articles containing same.Type: ApplicationFiled: October 25, 2017Publication date: August 22, 2019Inventors: Swapnil B. Chandak, Nitin Borse, Ayush A. Bafna, Yi Zhang, Timothy R. Lynn, Roger L. Kuhlman, John F. Szul