Patents by Inventor Paulus Pieter De Wit
Paulus Pieter De Wit 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: 20230357542Abstract: The present invention relates to methods for processing plant and/or micro-organism derived cellulose materials into rheology/structuring agents. More in particular, the present invention relates to methods wherein plant and/or micro-organism derived cellulose material is co-processed with carboxycellulose. The methods of the present invention provide a variety of benefits, in terms of process efficiency and scalability as well as in relation to the properties of the materials that are obtainable using these methods. For instance, it has been found that (highly) concentrated products produced using the method of the invention are easily (re)dispersible in water and aqueous systems to regain much of the cellulose component's original rheological performance.Type: ApplicationFiled: July 11, 2023Publication date: November 9, 2023Applicants: COÖPERATIE KONINKLIJKE COSUN U.A., NOURYON CHEMICALS INTERNATIONAL B.V.Inventors: Conrardus Hubertus Joseph THEEUWEN, Paulus Pieter DE WIT, Gijsbert Adriaan VAN INGEN, Franciscus Adrianus Ludovicus Maria STAPS
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Patent number: 11739197Abstract: The present invention relates to methods for processing plant and/or micro-organism derived cellulose materials into rheology/structuring agents. More in particular, the present invention relates to methods wherein plant and/or micro-organism derived cellulose material is co-processed with carboxycellulose. The methods of the present invention provide a variety of benefits, in terms of process efficiency and scalability as well as in relation to the properties of the materials that are obtainable using these methods. For instance, it has been found that (highly) concentrated products produced using the method of the invention are easily (re)dispersible in water and aqueous systems to regain much of the cellulose component's original rheological performance.Type: GrantFiled: May 5, 2020Date of Patent: August 29, 2023Assignees: COÖPERATIE KONINKLIJKE COSUN U.A., NOURYON CHEMICALS INTERNATIONAL B.V.Inventors: Conrardus Hubertus Joseph Theeuwen, Paulus Pieter De Wit, Gijsbert Adriaan Van Ingen, Franciscus Adrianus Ludovicus Maria Staps
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Publication number: 20220227970Abstract: The present invention relates to methods for processing plant and/or micro-organism derived cellulose materials into rheology/structuring agents. More in particular, the present invention relates to methods wherein plant and/or micro-organism derived cellulose material is co-processed with carboxycellulose. The methods of the present invention provide a variety of benefits, in terms of process efficiency and scalability as well as in relation to the properties of the materials that are obtainable using these methods. For instance, it has been found that (highly) concentrated products produced using the method of the invention are easily (re)dispersible in water and aqueous systems to regain much of the cellulose component's original rheological performance.Type: ApplicationFiled: May 6, 2019Publication date: July 21, 2022Applicants: Nouryon Chemicals International B.V., Coöperatie Koninklijke Cosun U.A.Inventors: Paulus Pieter de Wit, Conrardus Hubertus Joseph Theeuwen, Franciscus Adrianus Ludovicus Maria Staps, Gijsbert Adriaan van Ingen
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Publication number: 20220213297Abstract: The present invention relates to compositions comprising fibrillated cellulose and one or more nonionic cellulose ethers. Such compositions were found to be able to modify the rheology of an aqueous medium, also when the aqueous medium comprises salts and surfactants, whereby specific formulations shows desirable thixotropic thickening of the aqueous medium.Type: ApplicationFiled: May 6, 2019Publication date: July 7, 2022Applicants: Nouryon Chemicals International B.V, Coöperatie Koninklijke Cosun U.A.Inventors: Paulus Pieter De Wit, Conrardus Hubertus Joseph Theeuwen, Franciscus Adrianus Ludovicus Maria Staps, Gijsbert Adriaan van Ingen
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Publication number: 20200270429Abstract: The present invention relates to methods for processing plant and/or micro-organism derived cellulose materials into rheology/structuring agents. More in particular, the present invention relates to methods wherein plant and/or micro-organism derived cellulose material is co-processed with carboxycellulose. The methods of the present invention provide a variety of benefits, in terms of process efficiency and scalability as well as in relation to the properties of the materials that are obtainable using these methods. For instance, it has been found that (highly) concentrated products produced using the method of the invention are easily (re)dispersible in water and aqueous systems to regain much of the cellulose component's original rheological performance.Type: ApplicationFiled: May 5, 2020Publication date: August 27, 2020Inventors: Conrardus Hubertus Joseph Theeuwen, Paulus Pieter DE WIT, Gijsbert Adriaan Van Ingen, Franciscus Adrianus Ludovicus Staps
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Patent number: 9914786Abstract: The invention relates to a dry or slurry process to prepare phosphate-crosslinked cellulose ethers from a cellulose starting material comprising the steps of adding an alkalizing agent to the cellulose starting material to achieve mercerization, adding an ethehfying agent to the reaction mixture to achieve etherification of the cellulose, and adding a crosslinking agent to the reaction mixture to achieve crosslinking of the cellulose, wherein at least part of the alkalizing agent is added to the cellulose starting material before the etherification and/or crosslinking reactions take place to obtain alkalized cellulose; the crosslinking agent and the etherifying agent are added one after the other in random order or simultaneously; the crosslinking agent is an alkali metal thmetaphosphate; and the crosslinking and etherification steps are performed at an elevated temperature.Type: GrantFiled: July 9, 2015Date of Patent: March 13, 2018Assignee: Akzo Nobel Chemicals International B.V.Inventor: Paulus Pieter De Wit
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Publication number: 20150307631Abstract: The invention relates to a dry or slurry process to prepare phosphate-crosslinked cellulose ethers from a cellulose starting material comprising the steps of adding an alkalizing agent to the cellulose starting material to achieve mercerization, adding an ethehfying agent to the reaction mixture to achieve etherification of the cellulose, and adding a crosslinking agent to the reaction mixture to achieve crosslinking of the cellulose, wherein at least part of the alkalizing agent is added to the cellulose starting material before the etherification and/or crosslinking reactions take place to obtain alkalized cellulose; the crosslinking agent and the etherifying agent are added one after the other in random order or simultaneously; the crosslinking agent is an alkali metal thmetaphosphate; and the crosslinking and etherification steps are performed at an elevated temperature.Type: ApplicationFiled: July 9, 2015Publication date: October 29, 2015Applicant: AKZO NOBEL N.V.Inventor: Paulus Pieter De Wit
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Patent number: 9115217Abstract: The invention relates to a dry or slurry process to prepare phosphate-crosslinked cellulose ethers from a cellulose starting material comprising the steps of adding an alkalizing agent to the cellulose starting material to achieve mercerization, adding an etherifying agent to the reaction mixture to achieve etherification of the cellulose, and adding a crosslinking agent to the reaction mixture to achieve crosslinking of the cellulose, wherein at least part of the alkalizing agent is added to the cellulose starting material before the etherification and/or crosslinking reactions take place to obtain alkalized cellulose; the crosslinking agent and the etherifying agent are added one after the other in random order or simultaneously; the crosslinking agent is an alkali metal thmetaphosphate; and the crosslinking and etherification steps are performed at an elevated temperature.Type: GrantFiled: April 10, 2009Date of Patent: August 25, 2015Assignee: AKZO NOBEL N.V.Inventor: Paulus Pieter De Wit
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Publication number: 20110040085Abstract: The invention relates to a dry or slurry process to prepare phosphate-crosslinked cellulose ethers from a cellulose starting material comprising the steps of adding an alkalizing agent to the cellulose starting material to achieve mercerization, adding an ethehfying agent to the reaction mixture to achieve etherification of the cellulose, and adding a crosslinking agent to the reaction mixture to achieve crosslinking of the cellulose, wherein at least part of the alkalizing agent is added to the cellulose starting material before the etherification and/or crosslinking reactions take place to obtain alkalized cellulose; the crosslinking agent and the etherifying agent are added one after the other in random order or simultaneously; the crosslinking agent is an alkali metal thmetaphosphate; and the crosslinking and etherification steps are performed at an elevated temperature.Type: ApplicationFiled: April 10, 2009Publication date: February 17, 2011Applicant: AKZO NOBEL N.V.Inventor: Paulus Pieter De Wit
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Patent number: 6088077Abstract: The invention is directed to a liquid crystalline display comprising a display cell containing liquid crystalline material and a retardation layer. The retardation layer comprises a, preferably slightly cross-linked, high-molecular weight material layer and a substrate, wherein the high-molecular weight material has a nematic phase above its Tg and a dynamic viscosity at the working temperature of at least 100 Pa.s. The difference of the Tc of the high-molecular weight material and the Tc of the low-molecular weight material of the display cell (TC.sub.cell) is in the range of -30.degree. C. to +30.degree. C., preferably in the range of -20.degree. C. to +20.degree. C., and more preferably in the range of -10.degree. C. to +10.degree. C.; and the Tg of the high-molecular weight liquid crystalline material is lower than 50.degree. C.Type: GrantFiled: June 18, 1998Date of Patent: July 11, 2000Assignee: Akzo Nobel nvInventors: Paulus Pieter De Wit, Stephen James Picken, Andre Steenbergen, Martin Bosma