Patents by Inventor Venkata Rama Rao Goparaju
Venkata Rama Rao Goparaju 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: 20220049109Abstract: An anti-corrosion pigment for use in an aqueous-based coating composition is provided herein. The anti-corrosion pigment disclosed comprises a plurality of titanium dioxide particles; in the range of from about 0.05% by weight to about 1% by weight, based on the total weight of the pigment, of at least one non-volatile, organic hydroxyl amine deposited on the surfaces of the titanium dioxide particles; and in the range of from about 0.02% by weight to about 1% by weight, based on the total weight of the pigment, of at least one organic dispersant deposited on the surfaces of the titanium dioxide particles. The pigment is in dry form. An aqueous-based coating composition, a method of forming a dry anti-corrosion pigment for use in an aqueous-based coating composition, and a method of forming an aqueous-based coating composition are also provided.Type: ApplicationFiled: August 13, 2021Publication date: February 17, 2022Inventors: Quan Su, Venkata Rama Rao Goparaju
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Patent number: 10407544Abstract: A titanium dioxide pigment composition comprising a plurality of titanium dioxide particles and a polymer that is associated with the titanium dioxide particles and becomes associated with latex particles in an aqueous based coating formulation to inhibit agglomeration of the titanium dioxide particles while the coating formulation dries is provided. The polymer comprises a water soluble polymer backbone, at least one functional group that is attached to the polymer backbone and has an affinity for titanium dioxide, and at least one hydrophobic functional group that is attached to the polymer backbone and has an affinity for latex. Also provided is a method of manufacturing a titanium dioxide pigment composition.Type: GrantFiled: September 13, 2018Date of Patent: September 10, 2019Assignee: Tronox LLCInventors: Quan Su, Venkata Rama Rao Goparaju
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Publication number: 20190249014Abstract: A titanium dioxide pigment composition for use in a waterborne latex paint formulation is provided. The pigment composition comprises a plurality of titanium dioxide particles, and a dispersant package deposited on the surfaces of said titanium dioxide particles in an amount of no greater than about 5% by weight based on the combined weight of the titanium dioxide particles and the dispersant package. A titanium dioxide pigment composition slurry, a method of forming a titanium dioxide pigment composition, and a method of forming a titanium dioxide pigment composition slurry, all for use in a waterborne latex paint formulation, are also provided.Type: ApplicationFiled: February 14, 2018Publication date: August 15, 2019Inventors: Quan Su, Venkata Rama Rao Goparaju
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Patent number: 10370540Abstract: A treated, particulate inorganic pigment is provided. The treated, particulate inorganic pigment comprises a plurality of pigment particles, and a polyol ester deposited on the surfaces of the pigment particles. A method of forming a treated, particulate inorganic pigment and a polymer composition are also provided.Type: GrantFiled: September 11, 2015Date of Patent: August 6, 2019Assignee: Tronox LLCInventors: Venkata Rama Rao Goparaju, Vahid Kazerooni
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Patent number: 10125219Abstract: A novel polymer comprising a water soluble polymer backbone, at least one functional group attached to the polymer backbone and having an affinity for titanium dioxide, and at least one hydrophobic functional group attached to the polymer backbone and having an affinity for latex is provided. A titanium dioxide pigment composition including the novel polymer is also provided. Also provided is a method of manufacturing a titanium dioxide pigment composition that includes the novel polymer.Type: GrantFiled: October 30, 2014Date of Patent: November 13, 2018Assignee: Tronox LLCInventors: Quan Su, Venkata Rama Rao Goparaju
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Patent number: 9902800Abstract: A new polymer that is capable of forming a composite with titanium dioxide particles and latex particles when admixed therewith is provided. The new polymer includes a water soluble polymer backbone, a first functional group attached to the polymer backbone and having an affinity for latex, and a second functional group attached to the polymer backbone and capable of forming a bond with titanium dioxide. A polymer modified titanium dioxide pigment and a method of forming a pigmented paint formulation are also provided.Type: GrantFiled: June 19, 2017Date of Patent: February 27, 2018Assignee: Tronox LLCInventors: Quan Su, Venkata Rama Rao Goparaju
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Publication number: 20170335048Abstract: A new polymer that is capable of forming a composite with titanium dioxide particles and latex particles when admixed therewith is provided. The new polymer includes a water soluble polymer backbone, a first functional group attached to the polymer backbone and having an affinity for latex, and a second functional group attached to the polymer backbone and capable of forming a bond with titanium dioxide. A polymer modified titanium dioxide pigment and a method of forming a pigmented paint formulation are also provided.Type: ApplicationFiled: June 19, 2017Publication date: November 23, 2017Inventors: Quan Su, Venkata Rama Rao Goparaju
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Patent number: 9745405Abstract: A new polymer that is capable of forming a composite with titanium dioxide particles and latex particles when admixed therewith is provided. The new polymer includes a water soluble polymer backbone, a first functional group attached to the polymer backbone and having an affinity for latex, and a second functional group attached to the polymer backbone and capable of forming a bond with titanium dioxide. A polymer modified titanium dioxide pigment and a method of forming a pigmented paint formulation are also provided.Type: GrantFiled: April 20, 2015Date of Patent: August 29, 2017Assignee: Tronox LLCInventors: Quan Su, Venkata Rama Rao Goparaju
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Publication number: 20170073523Abstract: A treated, particulate inorganic pigment is provided. The treated, particulate inorganic pigment comprises a plurality of pigment particles, and a polyol ester deposited on the surfaces of the pigment particles. A method of forming a treated, particulate inorganic pigment and a polymer composition are also provided.Type: ApplicationFiled: September 11, 2015Publication date: March 16, 2017Inventors: Venkata Rama Rao Goparaju, Vahid Kazerooni
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Publication number: 20160304668Abstract: A new polymer that is capable of forming a composite with titanium dioxide particles and latex particles when admixed therewith is provided. The new polymer includes a water soluble polymer backbone, a first functional group attached to the polymer backbone and having an affinity for latex, and a second functional group attached to the polymer backbone and capable of forming a bond with titanium dioxide. A polymer modified titanium dioxide pigment and a method of forming a pigmented paint formulation are also provided.Type: ApplicationFiled: April 20, 2015Publication date: October 20, 2016Inventors: Quan Su, Venkata Rama Rao Goparaju
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Patent number: 9353266Abstract: A process for manufacturing titanium dioxide pigment is provided. The process comprises preparing an aqueous slurry of titanium dioxide particles. The process further includes deagglomerating the aqueous slurry of titanium dioxide particles using ultrasonication.Type: GrantFiled: March 12, 2014Date of Patent: May 31, 2016Assignee: Tronox LLCInventors: Venkata Rama Rao Goparaju, David F. Marshall, Vahid Kazerooni
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Publication number: 20160122472Abstract: A novel polymer comprising a water soluble polymer backbone, at least one functional group attached to the polymer backbone and having an affinity for titanium dioxide, and at least one hydrophobic functional group attached to the polymer backbone and having an affinity for latex is provided. A titanium dioxide pigment composition is provided including the novel polymer is also provided. Also provided is a method of manufacturing a titanium dioxide pigment composition that includes the novel polymer.Type: ApplicationFiled: October 30, 2014Publication date: May 5, 2016Inventors: Quan Su, Venkata Rama Rao Goparaju
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Patent number: 9315615Abstract: In one aspect, the invention provides a titanium dioxide pigment. The titanium dioxide pigment comprises a plurality of titanium dioxide particles, and a polymer deposited on the titanium dioxide particles for inhibiting agglomeration of the titanium dioxide particles in an aqueous based coating formulation. The titanium dioxide particles have anchoring moieties associated therewith for facilitating anchoring of the polymer to the particles. The polymer is a copolymer having anchoring groups for attaching to the anchoring moieties associated with the titanium dioxide particles and hydrophobic end groups for attaching to the resin of the coating formulation. In another aspect, the invention provides a method of manufacturing a titanium dioxide pigment.Type: GrantFiled: March 15, 2013Date of Patent: April 19, 2016Assignee: Tronox LLCInventors: Venkata Rama Rao Goparaju, David Frank Marshall
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Patent number: 8951607Abstract: Simplified and improved processes are provided for manufacturing titanium dioxide pigments including a surface treatment whereby a plurality of inorganic oxides or a combination of one or more inorganic oxides with one or more inorganic phosphates are applied to a titanium dioxide base pigment. Aqueous acid-soluble sources of the desired inorganic oxides and/or phosphates are predissolved in an aqueous acid, and these can be added on a batch wise or more preferably on a continuous basis to an alkaline slurry containing the titanium dioxide base pigment and to which aqueous alkaline-soluble sources of the desired inorganic oxides are being or have been added previously. Co-precipitation of the oxides and/or oxides and phosphates is then accomplished by an adjustment of the pH, to provide a surface treated pigment with excellent homogeneity of the deposited mixed oxides and/or oxides and phosphates.Type: GrantFiled: May 3, 2007Date of Patent: February 10, 2015Assignee: Tronox, LLCInventors: Daniel H. Craig, Venkata Rama Rao Goparaju
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Patent number: 8840719Abstract: The invention provides a coated inorganic oxide pigment. The inventive coated inorganic oxide pigment comprises an inorganic oxide base pigment, a porous inorganic coating formed on the base pigment, and a dense inorganic coating formed on the base pigment. The porous inorganic coating and dense inorganic coating each consist essentially of a material selected from the group consisting of silica and alumina. In another aspect, the invention provides a method of manufacturing a coated inorganic oxide pigment. In yet another aspect, the invention provides a polymer composition comprising a base polymer, and a coated inorganic oxide pigment admixed with the base polymer.Type: GrantFiled: March 9, 2011Date of Patent: September 23, 2014Assignee: Tronox LLCInventors: Venkata Rama Rao Goparaju, Michael L. Ashley
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Publication number: 20140261086Abstract: A process for manufacturing titanium dioxide pigment is provided. The process comprises preparing an aqueous slurry of titanium dioxide particles. The process further includes deagglomerating the aqueous slurry of titanium dioxide particles using ultrasonication.Type: ApplicationFiled: March 12, 2014Publication date: September 18, 2014Applicant: Tronox LLCInventors: Venkata Rama Rao Goparaju, David F. Marshall, Vahid Kazerooni
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Publication number: 20140275442Abstract: In one aspect, the invention provides a titanium dioxide pigment. The titanium dioxide pigment comprises a plurality of titanium dioxide particles, and a polymer deposited on the titanium dioxide particles for inhibiting agglomeration of the titanium dioxide particles in an aqueous based coating formulation. The titanium dioxide particles have anchoring moieties associated therewith for facilitating anchoring of the polymer to the particles. The polymer is a copolymer having anchoring groups for attaching to the anchoring moieties associated with the titanium dioxide particles and hydrophobic end groups for attaching to the resin of the coating formulation. In another aspect, the invention provides a method of manufacturing a titanium dioxide pigment.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Applicant: Tronox LLCInventors: Venkata Rama Rao Goparaju, David Frank Marshall
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Publication number: 20120232187Abstract: The invention provides a coated inorganic oxide pigment. The inventive coated inorganic oxide pigment comprises an inorganic oxide base pigment, a porous inorganic coating formed on the base pigment, and a dense inorganic coating formed on the base pigment. The porous inorganic coating and dense inorganic coating each consist essentially of a material selected from the group consisting of silica and alumina. In another aspect, the invention provides a method of manufacturing a coated inorganic oxide pigment. In yet another aspect, the invention provides a polymer composition comprising a base polymer, and a coated inorganic oxide pigment admixed with the base polymer.Type: ApplicationFiled: March 9, 2011Publication date: September 13, 2012Applicant: Tronox LLCInventors: Venkata Rama Rao Goparaju, Michael L. Ashley
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Publication number: 20080271642Abstract: Simplified and improved processes are provided for manufacturing titanium dioxide pigments including a surface treatment whereby a plurality of inorganic oxides or a combination of one or more inorganic oxides with one or more inorganic phosphates are applied to a titanium dioxide base pigment. Aqueous acid-soluble sources of the desired inorganic oxides and/or phosphates are predissolved in an aqueous acid, and these can be added on a batch wise or more preferably on a continuous basis to an alkaline slurry containing the titanium dioxide base pigment and to which aqueous alkaline-soluble sources of the desired inorganic oxides are being or have been added previously. Co-precipitation of the oxides and/or oxides and phosphates is then accomplished by an adjustment of the pH, to provide a surface treated pigment with excellent homogeneity of the deposited mixed oxides and/or oxides and phosphates.Type: ApplicationFiled: May 3, 2007Publication date: November 6, 2008Inventors: Daniel H. Craig, Venkata Rama Rao Goparaju
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Publication number: 20080022900Abstract: A process is described for manufacturing a titanium dioxide pigment, comprising the steps of a) preparing an aqueous, high solids slurry by gathering materials including crude titanium dioxide from the oxidation of titanium tetrachloride, a dispersant and water and then mixing the gathered materials to form the slurry, b) diluting the aqueous, high solids slurry by adding a further amount of water to the high solids slurry with mixing, c) media-milling the resultant aqueous, lesser solids slurry, d) recovering the media-milled, crude titanium dioxide product and e) finishing the media-milled, crude titanium dioxide product to produce a finished titanium dioxide pigment product.Type: ApplicationFiled: July 25, 2006Publication date: January 31, 2008Inventors: Venkata Rama Rao Goparaju, Ronnie Hoskins, Darci N. Pillars