Patents by Inventor Walid A. Al-Akhdar
Walid A. Al-Akhdar 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: 20240008481Abstract: The present invention relates to a method for controlling undesirable vegetation in an aquatic environment in which a rice plant is growing. In the method of this invention, a herbicidally effective amount of pendimethalin or of a composition comprising pendimethalin is applied to the aquatic environment before emergence of the undesirable vegetation and after germination of the rice seedlings. The method is particularly suitable for weed control in flooded rice fields.Type: ApplicationFiled: June 28, 2022Publication date: January 11, 2024Inventors: Walid A. Al-Akhdar, Charles W. Finch, Christa Diane Kirk
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Patent number: 10196334Abstract: The present invention relates to a process for the preparation of 2,6-di-tert-butyl phenol by reacting phenol with isobutylene in presence of an aluminum phenoxide catalyst, comprising i) preparing an aluminum phenoxide catalyst and phenol comprising mixture a) by mix-ing aluminum metal with phenol, and activating the catalyst by heating the mixture to a temperature of 100 to 180° C., and ii) carrying out a reaction b) by reacting mixture a) with an isobutylene comprising stream comprising 20 to 90% by weight of isobutylene and 10 to 80% by weight of 1-butene and/or 2-butene, which reaction is carried out under pressure and the maximum pressure is 5 to 20 bar.Type: GrantFiled: September 7, 2016Date of Patent: February 5, 2019Assignee: BASF SEInventors: Kai-Uwe Schoening, Walid A. Al-Akhdar, Tiziano Nocentini, Gerard Vilain
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Publication number: 20180244595Abstract: The present invention relates to a process for the preparation of 2,6-di-tert-butyl phenol by reacting phenol with isobutylene in presence of an aluminum phenoxide catalyst, comprising i) preparing an aluminum phenoxide catalyst and phenol comprising mixture a) by mix-ing aluminum metal with phenol, and activating the catalyst by heating the mixture to a temperature of 100 to 180° C., and ii) carrying out a reaction b) by reacting mixture a) with an isobutylene comprising stream comprising 20 to 90% by weight of isobutylene and 10 to 80% by weight of 1-butene and/or 2-butene, which reaction is carried out under pressure and the maximum pressure is 5 to 20 bar.Type: ApplicationFiled: September 7, 2016Publication date: August 30, 2018Applicant: BASF SEInventors: Kai-Uwe SCHOENING, Walid AL-AKHDAR, Tiziano NOCENTINI, Gerard VILAIN
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Patent number: 9328218Abstract: The invention relates to a compound of the formula (I-1) wherein n is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 or 25, R1, R2, R3, R4, R5, R?1, R?2, R?3, R?4 and R?5 are each independently from each other H or C1-C8-alkyl. Compounds of the formula (I-1) or stabilizer mixtures containing compounds of the formula (I-1) are especially used for stabilization of polymers against degradation by oxidation, heat or light.Type: GrantFiled: July 9, 2013Date of Patent: May 3, 2016Assignee: BASF SEInventors: Kai-Uwe Schoening, Cinzia Tartarini, Walid Al-Akhdar, Ulrich Berens, Bruno Rotzinger, Alexander Dichtl
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Patent number: 9108988Abstract: A method of purifying an organic diphosphite of general formula (I) The method comprises providing a crude organic diphosphite of general formula (I) that is at least partly dissolved in a first solvent (L1), wherein (L1) is selected from the group consisting of alkylbenzenes, aryl alkyl ethers, chlorobenzene, and mixtures thereof, and precipitating by admixing with a second solvent (L2) selected from the group consisting of linear C1-C4-alkanols, ethylene glycol di(C1-C4-alkyl) ethers, and mixtures thereof, and separating off the precipitated organic diphosphite from the solvents.Type: GrantFiled: December 31, 2012Date of Patent: August 18, 2015Assignee: BASF SEInventors: Ulrich Berens, Holger Ganz, Franz Niklaus Windlin, Walid Al-Akhdar
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Publication number: 20150191581Abstract: The invention relates to a compound of the formula (I-1) wherein n is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 or 25, R1, R2, R3, R4, R5, R?1, R?2, R?3, R?4, and R?5 are each independently from each other H or C1-C8-alkyl. Compounds of the formula (I-1) or stabilizer mixtures containing compounds of the formula (I-1) are especially used for stabilization of polymers against degradation by oxidation, heat or light.Type: ApplicationFiled: July 9, 2013Publication date: July 9, 2015Applicant: BASF SEInventors: Kai-Uwe Schoening, Cinzia Tartarini, Walid Al-Akhdar, Ulrich Berens, Bruno Rotzinger, Alexander Dichtl
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Publication number: 20110196082Abstract: The invention describes a storage-stable aqueous emulsion comprising a) a compound of the formula (I); wherein n is 4 to 23, b) a surfactant, and c) water, and describes a storage-stable liquid blend with low viscosity, which is not an aqueous emulsion, comprising a) a compound of the formula I d) at least a stabilizer selected from the group consisting of phosphites, phosphonites, aminic antioxidants, hydroxylamines, benzofuran-2-ones, thiosynergists, plasticizers, acid scavengers, lubricants, dispersing aids, sterically hindered amines, UV absorbers and sterically hindered phenols other than the compounds of the formula I according to component a). These emulsions and blends are useful as stabilizers for organic materials.Type: ApplicationFiled: June 23, 2009Publication date: August 11, 2011Applicant: BASF SEInventors: Karl-Heinz Hornbach, Roswell Easton King, Arpad Major, Jean-Roch Pauquet, Alex Wegmann, Thomas Wehrle, Philipp Walter, Andreas Cendra, Walid Al-akhdar
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Patent number: 7824575Abstract: The present invention provides for liquid antioxidant mixtures of octylated/butylated diphenylamine, phenothiazine and octadecyl (3,5-di-tert-butyl-4-hydroxyphenyl)-propionate. The antioxidant mixtures are useful for polyurethane stabilization.Type: GrantFiled: July 31, 2008Date of Patent: November 2, 2010Assignee: Ciba CorporationInventor: Walid Al-Akhdar
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Patent number: 7531487Abstract: Disclosed are stabilized lubricating oil compositions with improved oxidative performance. These lubricating oil compositions contain certain phenolic antioxidants, in combination with other antioxidants, which contribute to the improved performance. These certain phenolic antioxidants are defined in formula (I), wherein, R1 is alkyl of 1 to 4 carbon atoms, n is 1 to 4, R2 is H or R3, R3 is —(CH2)x—COOR4 where x is 1 to 10, R4 is straight or branched chain alkyl of 1 to 24 carbon atoms or E, when n is 1, E is straight or branched chain alkyl of 1 to 24 carbon atoms; when n is 2, E is straight or branched chain alkylene of 2 to 12 carbon atoms or said alkylene interrupted by one to five O or S atoms; when n is 3, E is a straight or branched chain alkanetriyl of 3 to 6 carbon atoms; and when n is 4, E is pentaerthyrityl.Type: GrantFiled: August 10, 2005Date of Patent: May 12, 2009Inventors: Walid Al-Akhdar, Laura F. Chafin, David Chasan
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Publication number: 20090032769Abstract: The present invention provides for liquid antioxidant mixtures of octylated/butylated diphenylamine, phenothiazine and octadecyl (3,5-di-tert-butyl-4-hydroxyphenyl)-propionate. The antioxidant mixtures are useful for polyurethane stabilization.Type: ApplicationFiled: July 31, 2008Publication date: February 5, 2009Inventor: Walid Al-Akhdar
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Patent number: 7468410Abstract: The present invention discloses a process for stabilizing polyolefin compositions against the deleterious effects of melt processing, heat aging and exposure to combustion products of natural gas, which process comprises incorporating or applying to a polyolefin an effective stabilizing amount of a tris-(mono-alkyl)phenyl phosphite ester of the formula I, or a mixture of phosphite esters of formula I, where each R is the same or different and is straight or branched chain alkyl of from 1 to 8 carbon atoms, and where said phosphite ester or phosphite ester mixture is in the liquid state at 25° C. and 1 atm of pressure. Also disclosed is a stabilized composition comprising polyolefin and a present phosphite ester or phosphite ester mixture as well as certain mixtures of tris-(mono-alkyl)phenyl phosphite. The present liquid phosphite ester stabilizers are especially compatible with low density polyethylene.Type: GrantFiled: July 17, 2006Date of Patent: December 23, 2008Assignee: Ciba Specialty Chemicals CorporationInventors: Laura F. Chafin, Walid Al-Akhdar, Sai Ping Shum, Stanley J. Padegimas, Roswell Easton King
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Publication number: 20070088108Abstract: The present invention discloses liquid cyclic phosphites of for example the formula where n is 1 or 2; when n is 1, R17 is straight or branched chain alkyl of 1 to 18 carbon atoms, when n is 2, R17 is —CtH2t— or —CH2CH2-T3-CH2CH2— where T3 is —S— or >N—R22 where R22 is straight or branched chain alkyl of 1 to 12 carbon atoms and t is an integer of from 2 to 6, R1, R2, R3, R4, R5 and R6 are independently hydrogen, methyl, ethyl, i-propyl, n-propyl, n-butyl, sec-butyl or t-butyl and R is hydrogen. Also disclosed is a stabilized composition comprising polyolefin and a present liquid cyclic phosphite and a process for the stabilization of polyolefin by incorporating therein or applying thereto a present liquid cyclic phosphite. The present liquid phosphite stabilizers are especially compatible with polyolefins.Type: ApplicationFiled: October 11, 2006Publication date: April 19, 2007Inventors: Samuel Evans, Sai Shum, Roswell King, Walid Al-Akhdar
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Publication number: 20070021537Abstract: The present invention discloses a process for stabilizing polyolefin compositions against the deleterious effects of melt processing, heat aging and exposure to combustion products of natural gas, which process comprises incorporating or applying to a polyolefin an effective stabilizing amount of a tris-(mono-alkyl)phenyl phosphite ester of the formula I, or a mixture of phosphite esters of formula I, where each R is the same or different and is straight or branched chain alkyl of from 1 to 8 carbon atoms, and where said phosphite ester or phosphite ester mixture is in the liquid state at 25° C. and 1 atm of pressure. Also disclosed is a stabilized composition comprising polyolefin and a present phosphite ester or phosphite ester mixture as well as certain mixtures of tris-(mono-alkyl)phenyl phosphite. The present liquid phosphite ester stabilizers are especially compatible with low density polyethylene.Type: ApplicationFiled: July 17, 2006Publication date: January 25, 2007Inventors: Laura Chafin, Walid Al-Akhdar, Sai Shum, Stanley Padegimas, Roswell King
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Publication number: 20060040833Abstract: Disclosed are stabilized lubricating oil compositions with improved oxidative performance. These lubricating oil compositions contain certain phenolic antioxidants, in combination with other antioxidants, which contribute to the improved performance. These certain phenolic antioxidants are defined in formula (I), wherein, R1 is alkyl of 1 to 4 carbon atoms, n is 1 to 4, R2 is H or R3, R3 is —(CH2)x-COOR4 where x is 1 to 10, R4 is straight or branched chain alkyl of 1 to 24 carbon atoms or E, when n is 1, E is straight or branched chain alkyl of 1 to 24 carbon atoms; when n is 2, E is straight or branched chain alkylene of 2 to 12 carbon atoms or said alkylene interrupted by one to five O or S atoms; when n is 3, E is a straight or branched chain alkanetriyl of 3 to 6 carbon atoms; and when n is 4, E is pentaerthyrityl.Type: ApplicationFiled: August 10, 2005Publication date: February 23, 2006Inventors: Walid Al-Akhdar, Laura Chafin, David Chasan
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Patent number: 6777459Abstract: The present invention relates to a novel photoinitiator system comprising one or more acylphosphine oxide photoinitiators and one or more lightfast red, blue or violet organic pigments. Low yellow color formation results upon curing ethylenically unsaturated compounds with the new photoinitiator system. Particular applications include clear and white coatings, screen inks, gel coats, powder coatings, composites, adhesives and lenses.Type: GrantFiled: October 3, 2002Date of Patent: August 17, 2004Assignee: Ciba Specialty Chemicals CorporationInventors: Walid Al-Akhdar, David Bramer, Eugene Valentine Sitzmann, Jr., Donald A. Wostratzky
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Publication number: 20030119932Abstract: The present invention relates to a novel photoinitiator system comprising one or more acylphosphine oxide photoinitiators and one or more lightfast red, blue or violet organic pigments. Low yellow color formation results upon curing ethylenically unsaturated compounds with the new photoinitiator system. Particular applications include clear and white coatings, screen inks, gel coats, powder coatings, composites, adhesives and lenses.Type: ApplicationFiled: October 3, 2002Publication date: June 26, 2003Inventors: Walid Al-Akhdar, David Bramer, Eugene Valentine Sitzmann, Donald A. Wostratzky
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Patent number: 6486226Abstract: The present invention relates to a novel photoinitiator system comprising one or more acylphosphine oxide photoinitiators and one or more lightfast red, blue or violet organic pigments. Low yellow color formation results upon curing ethylenically unsaturated compounds with the new photoinitiator system. Particular applications include clear and white coatings, screen inks, gel coats, powder coatings, composites, adhesives and lenses.Type: GrantFiled: December 5, 2000Date of Patent: November 26, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Walid Al-Akhdar, David Bramer, Eugene Valentine Sitzmann, Jr., Donald A. Wostratzky
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Publication number: 20020107298Abstract: The present invention relates to a novel photoinitiator system comprising one or more acylphosphine oxide photoinitiators and one or more lightfast red, blue or violet organic pigments. Low yellow color formation results upon curing ethylenically unsaturated compounds with the new photoinitiator system. Particular applications include clear and white coatings, screen inks, gel coats, powder coatings, composites, adhesives and lenses.Type: ApplicationFiled: December 5, 2000Publication date: August 8, 2002Inventors: Walid Al-Akhdar, David Bramer, Eugene Valentine Sitzmann, Donald A. Wostratzky
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Patent number: 6296674Abstract: White, dyed, dipped, unscented and/or scented candle wax is effectively stabilized against discoloration and fading by the incorporation therein of a red-shifted benzotriazole either alone or in combination with a hindered amine and/or an antioxidant.Type: GrantFiled: February 1, 2000Date of Patent: October 2, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Kevin Trainor, Walid Al-Akhdar, James Lee Hyun, Ramanathan Ravichandran, Joseph Suhadolnik, Andrea Smith, Mervin Wood
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Patent number: 6221115Abstract: Candle wax containing a combination of a UV absorber, preferably a benzotriazole, in combination with a hindered amine which is substituted on the N-atom by an alkoxy, a cycloalkoxy or an hydroxy-substituted alkoxy moiety is surprising better stabilized than candle wax which contains a combination of a UV absorber and a conventional hindered amine where the N-atom is substituted by hydrogen or alkyl.Type: GrantFiled: February 1, 2000Date of Patent: April 24, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: James Lee Hyun, Walid Al-Akhdar, Kevin Trainor, Ramanathan Ravichandran, Mervin Wood, Andrea Smith