Patents Assigned to W. R. Grace & Co.-Conn.
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Patent number: 12203006Abstract: Improved silica-based matting agents are disclosed. The matting agents are useful in waterborne coatings composition to provide exceptional properties to a wood based substrate. Films resulting from the silica-based matting agents on a wood substrate unexpectedly provide improved chemical resistance and/or film clarity to the surface of the wood substrate. Methods of making and using the matting agents are also disclosed.Type: GrantFiled: August 3, 2018Date of Patent: January 21, 2025Assignee: W.R. Grace & Co.-Conn.Inventors: Feng Gu, James Neil Pryor
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Patent number: 12187880Abstract: Polypropylene polymer compositions are disclosed that have excellent stiffness properties. The polypropylene polymer compositions are made by combining a first polypropylene polymer with a second polypropylene polymer. The combination of polymers has been found to produce a composition having high stiffness properties in addition to excellent toughness properties. In addition, the polymer composition has good flow properties for being molded into various products and articles. Of particular advantage, the different polypropylene polymers can be produced at relatively high catalyst activity, especially in comparison to high crystalline polymers made in the past.Type: GrantFiled: April 3, 2020Date of Patent: January 7, 2025Assignee: W.R. GRACE & CO.-CONNInventors: John Kaarto, Jing Zhong, Amaia Montoya-Goni
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Publication number: 20240425769Abstract: A system for converting plastic includes a catalyst regenerator, a feeder containing plastic feedstock, a first conical spouted bed reactor stage in fluid communication with the catalyst regenerator and in fluid communication with the feeder, and a second conical spouted bed reactor stage in fluid communication with the first conical spouted bed reactor stage.Type: ApplicationFiled: October 5, 2022Publication date: December 26, 2024Applicant: W.R. Grace & Co.-CONN.Inventors: Wu-Cheng CHENG, Guang YUAN, Robert Hibbard HARDING, Abubacker SIDDIEQ, Anapagaddi RAVIKIRAN
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Publication number: 20240392047Abstract: An isolated solid catalyst component for olefin polymerization. The catalyst component comprises a halide-containing magnesium compound, a titanium halide compound, a supportive donor comprising a benzoate, an internal electron donor, and an activity control agent (AC A). The AC A comprises at least one of: i) a first organosilicon compound containing Si—O groups being present in the catalyst component in an amount from about 0.1 to about 5% by weight: ii) an organic ester of a C4 to C30 aliphatic acid or a poly (alkene glycol) ester of a C4 to C30 aliphatic acid in amount from about 0.1% to about 15% by weight: and iii) an organo-aluminum compound containing an alkyl group. At least a part of the ACA is chemically bonded to the halide-containing magnesium compound.Type: ApplicationFiled: August 30, 2022Publication date: November 28, 2024Applicant: W.R. Grace & Co.-CONNInventors: Vladimir P. MARIN, Keith G. HILFERDING, Ahmed HINTOLAY
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Publication number: 20240343840Abstract: A process for increasing a settled bulk density of a granular polyolefin polymer includes feeding a catalyst stream into a gas phase polymerization reactor, the catalyst stream comprising catalyst particles, optionally in slurry form by suspending in a mineral oil and/or other hydrocarbon liquid, contained in a carrier fluid; feeding a support gas into the gas phase polymerization reactor together with the catalyst stream entering the reactor, the support gas being fed into the gas phase reactor at a velocity; forming polyolefin particles in the gas phase polymerization reactor through contact with the catalyst particles and a monomer and optionally one or more comonomers; and determining a settled bulk density of the granular polyolefin particles, and, based on the settled bulk density, selectively increasing or decreasing the velocity of the support gas in order to maintain the settled bulk density above a preset limit.Type: ApplicationFiled: August 8, 2022Publication date: October 17, 2024Applicant: W.R. Grace & Co.-Conn.Inventors: Ping CAI, David M. ERDELT, John Dealon STANLEY
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Publication number: 20240309133Abstract: A propylene terpolymer is constructed that is particularly well suited for use in heat seal applications. The propylene terpolymer, for instance, can be used to form a heat seal layer on a multilayer film. The heat seal layer can be used to bond two opposing layers of film together for forming packages and other articles. The propylene terpolymer is formed with an increased random ethylene distribution that results in reduced polymer crystallinity, reduced melting temperature, and lower heat seal temperature.Type: ApplicationFiled: June 30, 2022Publication date: September 19, 2024Applicant: W.R. Grace & Co.-Conn.Inventors: Zhiru MA, Jose Manuel REGO, Jonathan REEDS, Ping CAI
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Publication number: 20240287345Abstract: A polymer composition containing a polypropylene polymer having low shrinkage characteristics is disclosed. The polymer composition is particularly well suited for use in three-dimensional printing systems. For example, a polymer composition can be formulated containing the polypropylene polymer and formed into a filament, a rod or pellets that are then fed through a three-dimensional printer. The polypropylene polymer can be a random polypropylene copolymer or terpolymer that has controlled amounts of comonomer content and a xylene soluble content.Type: ApplicationFiled: June 9, 2022Publication date: August 29, 2024Applicant: W.R. Grace & Co.-Conn.Inventors: Lian Bai, Xiaohui Liu, Zhiru Ma
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Publication number: 20240228682Abstract: A polyethylene copolymer comprising ethylene units and C4 to C8 ?-olefin comonomer units having the following characteristics: a melt index from about 0.1 to about 15 g/10 min as determined at 190° C. by ASTM D1238 under 2.16 kg and at 190° C.; a density from 0.905 to 0.930 g/cc; a molecular weight distribution from about 1.5 to about 2.7; a Crystallization Elution Fractionation temperature range excluding the first 10% and the last 1% polymer on the temperature scale following the equation: ?T[° C.]??909*(density[g/cc])+863; and a lamellar thickness distribution following the equation: F %?510*(density[g/cc]?0.905), where F % is the percentage of lamellar thickness greater than 12 nm.Type: ApplicationFiled: May 13, 2022Publication date: July 11, 2024Applicant: W.R. Grace & Co.-Conn.Inventors: Vivek KALIHARI, John H. HAIN, Jing ZHONG, C. Gail BLAKLEY, Matthew G. THORN
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Patent number: 11999857Abstract: Improved silica based matting agents are disclosed. The matting agents are useful in waterborne coatings composition to provide exceptional properties to a wood based substrate. Films resulting on the coated substrate unexpectedly provide improved chemical resistance, thermal stress resistance, weather resistance, and/or film clarity to the surface of a wood substrate. Methods of making and using the matting agents are also disclosed.Type: GrantFiled: June 1, 2018Date of Patent: June 4, 2024Assignee: W.R. Grace & Co.-Conn.Inventor: Feng Gu
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Publication number: 20240174776Abstract: A process of producing a spherical catalyst component for use in producing polyolefin polymers includes dissolving a magnesium halide compound in a solvent to form a homogeneous solution, the solvent comprising an alcohol; and treating the homogeneous solution with a titanium compound in the presence of a surfactant, a supportive electron donor, and an internal electron donor to form a solid catalyst component comprising a magnesium halide compound base incorporating a titanium unit, the supportive electron donor, and the internal electron donor; wherein the catalyst component comprises particles having a substantially spherical shape and a D50 from about 3 ?m to about 150 ?m.Type: ApplicationFiled: March 8, 2022Publication date: May 30, 2024Applicant: W.R. Grace & Co.-Conn.Inventors: Vladimir P. MARIN, Ahmed HINTOLAY
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Patent number: 11993672Abstract: Disclosed are catalyst compositions having an internal electron donor which includes a 3,6-di-substituted-1,2-phenylene aromatic diester. Ziegler-Natta catalyst compositions containing the present catalyst compositions exhibit very high hydrogen response, high activity, high selectivity and produce propylene-based olefins with high melt flow rate.Type: GrantFiled: December 16, 2021Date of Patent: May 28, 2024Assignee: W.R. Grace & Co.-Conn.Inventors: Linfeng Chen, Tak W. Leung, Tao Tao, Kuanqiang Gao
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Publication number: 20240165600Abstract: A modified zeolite catalyst composition is disclosed formed from a zeolite, alumina binder, and matrix. The modified zeolite catalyst composition may contain fluorine. Also disclosed, are methods for the preparation of pyridine and/or its alkylpyridine derivatives in high yield utilizing the modified zeolite catalyst composition.Type: ApplicationFiled: October 20, 2020Publication date: May 23, 2024Applicant: W.R. Grace & Co.-Conn.Inventor: Dorai Ramprasad
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Publication number: 20240157335Abstract: A stationary phase for high-performance liquid chromatography including monofunctional primary silane functionalized silica provides improved separation performance for the preparative or process scale purification of cannabidiol (CBD) and tetrahydro-cannabinol (THC). Silica bonded with monofunctional primary silane(s) provides more efficient separation of these molecules through higher resolution values, reduced peak broadening and lower separation impedance, thus enabling higher purity product or more efficient purification process.Type: ApplicationFiled: March 9, 2022Publication date: May 16, 2024Applicant: W.R. Grace & Co.-Conn.Inventors: Keling ZHANG, Reno NGUYEN, Simon THOMAS
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Publication number: 20240150503Abstract: A propylene-ethylene copolymer includes propylene as a primary monomer, an ethylene content (ET) of 3.0% to 5% by weight, a melt flow rate of from 20 to 45 g/10 min, a xylene soluble fraction (XS) of from 2.0% to 7.0% by weight, and an XS/ET ratio of less than or equal to 1.51.Type: ApplicationFiled: December 5, 2023Publication date: May 9, 2024Applicant: W.R. GRACE & CO.-CONN.Inventors: Matthew Fedec, Jan Van Egmond, Manu Rego, John Kaarto, Li-Min Tau
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Patent number: 11945896Abstract: A Ziegler-Natta catalyst composition is disclosed. The catalyst composition includes an internal electron donor with improved polymerization kinetics, a long lifetime, improved stereoselectivity and/or improved hydrogen response.Type: GrantFiled: September 10, 2020Date of Patent: April 2, 2024Assignee: W.R. Grace & Co.-CONN.Inventors: Joseph Coalter, III, Rose Kent, Adam Marwitz, Ronald Epstein, Michael Elder
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Patent number: 11905347Abstract: Propylene and alpha olefin random copolymers are disclosed that have excellent flow characteristics. For instance, the copolymers can be formulated so as to have a melt flow rate of greater than about 45 g/10 min. While still retaining the above flow characteristics, the copolymer can also be formulated to have greater stiffness, low xylene soluble content, and excellent transparency characteristics especially when combined with one or more clarifying agents.Type: GrantFiled: June 7, 2019Date of Patent: February 20, 2024Assignee: W.R. GRACE & CO .- CONN.Inventors: Matthew John Fedec, Jan Willem Van Egmond, John Kalevi Kaarto, Amaia Montoya-Goni
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Publication number: 20240043633Abstract: Olefin polymers are produced having a controlled amount of xylene soluble content. For example, polypropylene polymers can be produced having a relatively high xylene soluble content. The polymers are produced using particular external electron donors. The polymers can be produced without using a silicon-containing external electron donor.Type: ApplicationFiled: November 30, 2021Publication date: February 8, 2024Applicant: W.R. Grace & Co.-CONN.Inventor: Jan W. Van Egmond
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Patent number: 11891460Abstract: An activated solid catalyst component is disclosed formed from a magnesium compound, a titanium compound, an organosilicon compound, a supportive electron donor, and at least one internal electron donor. The solid catalyst component is activated to include titanium and carbon bonds by reaction with an activation agent, such as an aluminum compound. In one embodiment, small amounts of polymer are polymerized with the catalyst component during activation. The activated catalyst component is stable and, when formed, can later be used to produce various polyolefin polymers. The activated catalyst component has controlled reaction kinetics so that the catalyst does not overheat and degrade during initial polymerization.Type: GrantFiled: May 7, 2020Date of Patent: February 6, 2024Assignee: W. R. Grace & Co.-Conn.Inventor: Vladimir Marin
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Publication number: 20240018346Abstract: A polymer composition includes a low ethylene random copolymer that can be used to form a meltspun or spunbond article at high spinning velocities. The polymer composition has a low xylene soluble content, a high crystallinity, or both, while having reduced spin-break at high spinning velocities. The polymer composition also exhibits good fiber tenacity and fabric softness.Type: ApplicationFiled: December 6, 2021Publication date: January 18, 2024Applicant: W.R. Grace & Co.-CONN.Inventor: John Kaarto
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Patent number: 11873355Abstract: Propylene-ethylene copolymer compositions and production methods are provided. The copolymer compositions can be particularly advantageous for use in hot fill packaging of foodstuffs. The propylene-ethylene copolymers can be produced using a Ziegler-Natta catalyst and an alkoxysilane electron donor. The compositions can have propylene as a primary monomer with an ethylene content ranging from 2.0 to 6.0 percent by weight with a xylene soluble content of less than 7.0 percent by weight.Type: GrantFiled: June 7, 2019Date of Patent: January 16, 2024Assignee: W.R. Grace & Co.-Conn.Inventors: Matthew John Fedec, Jan Willem Van Egmond, Manu Rego, John Kalevi Kaarto, Li-Min Tau