Patents Assigned to Rohmax Additives GmbH
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Publication number: 20060142168Abstract: The present invention is directed to a lubricating oil composition, a diesel engine comprising a lubricating oil composition, and a method of lubricating a diesel engine provided with an exhaust gas recirculation system, comprising lubricating said engine with a lubricating oil composition comprising an oil of lubricating viscosity, and a polymeric N-dispersant booster comprising monomer units of: a) 0 to 40 wt. % of one or more ethylenically unsaturated ester compounds of formula (I) wherein R is equal to H or CH3, R1 represents a linear or branched alkyl group with 1 to 5 carbon atoms, R2 and R3 independently represent H or a group of the formula —COOR?, wherein R? is H or an alkyl group with 1 to 5 carbon atoms, b) 10 to 98 wt.Type: ApplicationFiled: December 23, 2004Publication date: June 29, 2006Applicant: ROHMAX ADDITIVES GMBHInventors: Bernard Kinker, Matthias Fischer, Martin Bollinger, Robert Cybert, Ernst Bielmeier, David Cooper, Angelika Fischer, Melanie Croessmann
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Publication number: 20050267239Abstract: The present invention relates to a polymer dispersion having low viscosity, comprising A) at least one dispersed polyolefin, B) at least one dispersing component, C) at least one carrier medium and D) at least one compound having a dielectric constant of greater than or equal to 9.Type: ApplicationFiled: August 27, 2003Publication date: December 1, 2005Applicant: ROHMAX ADDITIVES GMBHInventor: Markus Scherer
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Publication number: 20050261143Abstract: The present invention relates to a polymer dispersion having high stability, comprising A) at least one dispersed polyolefin, B) at least one dispersing component, C) mineral oil and D) at least one compound comprising (oligo)oxyalkyl groups.Type: ApplicationFiled: August 27, 2003Publication date: November 24, 2005Applicant: ROHMAX ADDITIVES GMBHInventors: Markus Scherer, Alexander Dardin, Wolfgang Tschepat, Stephan Massoth
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Publication number: 20050245406Abstract: The present invention relates to lubricating greases comprising at least one thickening agent and at least one lubricating oil, wherein the lubricating grease contains at least one polymeric structure improver that can be obtained by polymerization of monomer compositions, which are composed of a) 0 to 40 wt %, relative to the weight of the monomer compositions for synthesis of the polymeric structure improvers, of at least one (meth)acrylate of formula (I) in which R represents hydrogen or methyl, R1 denotes a straight-chain or branched alkyl moiety having 1 to 5 carbon atoms, b) 40 to 99.99 wt %, relative to the weight of the monomer compositions for synthesis of the polymeric structure improvers, of at least one (meth)acrylate of formula (II) in which R represents hydrogen or methyl, R2 denotes a straight-chain or branched alkyl moiety having 6 to 30 carbon atoms, c) 0.Type: ApplicationFiled: April 30, 2004Publication date: November 3, 2005Applicant: ROHMAX ADDITIVES GMBHInventors: Markus Scherer, Matthias Fischer, Michael Mueller, Bernard Kinker, Alexandra Pauker
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Publication number: 20050239937Abstract: The present invention relates to a stable polymer dispersion comprising A) at least one dispersed polyolefin, B) at least one dispersing component, C) at least one ester and D) at least one ether comprising (oligo)oxyalkyl groups, the weight ratio of ester C) to ether D) being in the range from 30:1 to 1:30.Type: ApplicationFiled: August 27, 2003Publication date: October 27, 2005Applicant: ROHMAX ADDITIVES GMBHInventors: Markus Scherer, Wolfgang Tschepat
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Publication number: 20050148749Abstract: The invention relates to copolymers which are suitable for producing additives for solvent deparaffination of paraffin-containing mineral oil distillates and which consist of radically polymerized monomers of formulas A and B, wherein the radicals have the meaning cited in the description. The invention also relates to the use of said copolymers for the production of dewaxing additives.Type: ApplicationFiled: February 14, 2003Publication date: July 7, 2005Applicant: ROHMAX ADDITIVES GMBHInventors: Markus Scherer, Michael Mueller, Jean-Luc Herbeaux, Dieter Janssen, Melanie Croessmann
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Publication number: 20050023504Abstract: The present invention concerns a functional fluid comprising A) 1 to 99% by weight based on the total weight of the functional fluid of alkyl(meth)acrylate polymers obtainable by polymerizing a mixture of olefinically unsaturated monomers, which consists of a) 1-100 wt % based on the total weight of the ethylenically unsaturated monomers of one or more ethylenically unsaturated ester compounds of formula (I) where R is hydrogen or methyl, R1 means a linear or branched alkyl residue with 1-6 carbon atoms, R2 and R3 independently represent hydrogen or a group of the formula —COOR?, where R? means hydrogen or a alkyl group with 1-6 carbon atoms, b) 0-99 wt % based on the total weight of the ethylenically unsaturated monomers of one or more ethylenically unsaturated ester compounds of formula (II) where R is hydrogen or methyl, R4 means a linear or branched alkyl residue with 7-40 carbon atoms, R5 and R6 independently are hydrogen or a group of the formula —COOR?, where R? means hydrogen or an alkyl groType: ApplicationFiled: July 25, 2003Publication date: February 3, 2005Applicant: RohMax Additives GmbHInventors: Douglas Placek, Bernhard Kinker, David Cooper, Robert Simko
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Patent number: 6841695Abstract: The present invention relates to a process for preparing dithioesters in which a dithiocarboxylic acid and/or a dithiocarboxylic salt is reacted with a vinyl compound and/or an alkyl compound which includes a leaving group, the reaction being carried out in a biphasic system in which one of the phases comprises water and the weight ratio of the aqueous phase to the organic phase lies in the range from 95:5 to 5:95.Type: GrantFiled: March 18, 2003Date of Patent: January 11, 2005Assignee: Rohmax Additives GmbHInventors: Joseph Martin Bollinger, Jen-Lung Wang
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Publication number: 20040186302Abstract: The present invention relates to a process for preparing dithioesters in which a dithiocarboxylic acid and/or a dithiocarboxylic salt is reacted with a vinyl compound and/or an alkyl compound which includes a leaving group, the reaction being carried out in a biphasic system in which one of the phases comprises water and the weight ratio of the aqueous phase to the organic phase lies in the range from 95:5 to 5:95.Type: ApplicationFiled: March 18, 2003Publication date: September 23, 2004Applicant: RohMax Additives GmbHInventors: Joseph Martin Bollinger, Jen-Lung Wang
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Patent number: 6712991Abstract: A method for making a viscosity index improving copolymer includes heating a reaction mixture including from about 55 weight percent to about 99.5 weight percent of a first monomer selected from the group consisting of (C8-C15)alkyl (meth)acrylates and mixtures thereof, from about 0.5 weight percent to about 45 weight percent of a second monomer selected from the group consisting of (C1-C7)alkyl (meth)acrylates, (C16-C24)alkyl(meth)acrylates and mixtures thereof, a polymerization initiator and a hydrocarbon diluent, to a reaction temperature from about 75° C. to about 100° C. and maintaining the reaction mixture at the reaction temperature for a period of time effective to allow copolymerization of the monomers.Type: GrantFiled: November 19, 2001Date of Patent: March 30, 2004Assignee: Rohmax Additives GmbHInventors: Robert H. Gore, Bridget M. Stevens
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Patent number: 6689844Abstract: Polymer compositions with reduced living halogen content are used as additive to lubricating oils and are prepared by polymerizing at least one ethylenically unsaturated monomer using a) at least one initiator containing a transferable halogen and b) one or more metal catalysts containing at least one transition metal, in the presence of ligands which can form a coordination compound with the one or more metal catalysts, to obtain a polymer composition having a living halogen content, and after the polymerizing, reacting the polymer composition having a living halogen content with at least one organic nitrogen compound in the presence of a nonpolar solvent, thereby reducing the living halogen content to obtain the polymer composition having a reduced halogen content.Type: GrantFiled: May 29, 2001Date of Patent: February 10, 2004Assignee: RohMax Additives GmbHInventors: Sebastian Roos, Joseph Martin Bollinger, Markus Scherer
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Patent number: 6639029Abstract: The present invention relates to a process for synthesis of polymer compositions, wherein ethylenically unsaturated monomers are polymerized by means of initiators containing a transferable atom or group of atoms and of one or more catalysts comprising at least one transition metal in the presence of ligands which can form a coordination compound with the metal catalyst or catalysts, the process being characterized in that the polymerization takes place by means of continuous process operation.Type: GrantFiled: November 13, 2000Date of Patent: October 28, 2003Assignee: Rohmax Additives GmbHInventors: Markus Scherer, Joseph Martin Bollinger, David J. Cooper, Jr., Larry Stephen Tillery, Robert Woodruff
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Patent number: 6610802Abstract: The present invention relates to a process for synthesis of polymer compositions with reduced catalyst content, wherein ethylenically unsaturated monomers containing less than 0.5 wt % of ethylenically unsaturated monomers with at least one carboxylic group, sulfonic acid group and/or at least one phosphonic acid group relative to the total weight of the ethylenically unsaturated monomers are polymerized by means of initiators containing a transferable group of atoms and of one or more catalysts comprising at least one transition metal in the presence of ligands which can form a coordination compound with the metal catalyst or catalysts and, after the polymerization, the catalyst contained in the polymer is at least partly separated. For this purpose, the polymer composition is filtered, after the polymerization, in the presence of at least one filter aid which contains at least 0.Type: GrantFiled: May 29, 2001Date of Patent: August 26, 2003Assignee: RohMax Additives GmbHInventors: Sebastian Roos, Boris Eisenberg, Carolin Harpe
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Patent number: 6610801Abstract: The present invention relates to processes for synthesis of poly(meth)acrylate compositions, wherein ethylenically unsaturated monomers are transformed to polymers by means of initiators containing a transferable group of atoms and of one or more catalysts comprising at least one transition metal in the presence of ligands which can form a coordination compound with the metal catalyst or catalysts, wherein ethylenically unsaturated monomers containing 50 to 100 wt %, relative to the total weight of ethylenically unsaturated monomers, of (meth)acrylates of formula (I) are polymerized wherein R denotes hydrogen or methyl, R1 denotes a straight-chain or branched alkyl group with 8 to 40, carbon atoms, R2 and R3 independently denote hydrogen or a group of the formula —COOR1, wherein R′ denotes hydrogen or a straight-chain or branched alkyl group with 8 to 40, carbon atoms, in the presence of copper, the total concentration of copper of oxidation numbers (I) and (II) in the polymerizaType: GrantFiled: November 13, 2000Date of Patent: August 26, 2003Assignee: RohMax Additives GmbHInventor: Markus Scherer
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Publication number: 20030060587Abstract: The present invention relates to a process for synthesis of polymer compositions with reduced catalyst content, wherein ethylenically unsaturated monomers containing less than 0.5 wt % of ethylenically unsaturated monomers with at least one carboxylic group, sulfonic acid group and/or at least one phosphonic acid group relative to the total weight of the ethylenically unsaturated monomers are polymerized by means of initiators containing a transferable group of atoms and of one or more catalysts comprising at least one transition metal in the presence of ligands which can form a coordination compound with the metal catalyst or catalysts and, after the polymerization, the catalyst contained in the polymer is at least partly separated. For this purpose, the polymer composition is filtered, after the polymerization, in the presence of at least one filter aid which contains at least 0.Type: ApplicationFiled: May 29, 2001Publication date: March 27, 2003Applicant: RohMax Additives GmbHInventors: Sebastian Roos, Boris Eisenberg, Carolin Harpe
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Publication number: 20020188081Abstract: The present invention relates to processes for synthesis of polymer compositions with reduced living halogen content, wherein ethylenically unsaturated monomers are polymerized by means of initiators containing a transferable halogen and of one or more catalysts comprising at least one transition metal in the presence of ligands which can form a coordination compound with the metal catalyst or catalysts and, after the polymerization, the living halogen atoms present in the polymer are at least partly eliminated, wherein after the polymerization the polymer composition is reacted with at least one organic nitrogen compound in the presence of a nonpolar solvent.Type: ApplicationFiled: May 29, 2001Publication date: December 12, 2002Applicant: RohMax Additives GmbH KirschenalleeInventors: Sebastian Roos, Joseph Martin Bollinger, Markus Scherer
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Patent number: 6458750Abstract: The invention relates to engine oil compositions with reduced deposit-formation tendency which contain between 0.05 and 10% by weight, in relation to the total weight of the engine oil composition, of an alkyl alkoxylate of formula (I), in which R 1 , R 2 and R 3 independently are hydrogen or a hydrocarbon rest with up to 40 carbon atoms; R 4 is hydrogen, a methyl or ethyl rest; L is a linking group; n is a whole number between 4 and 40; A is an alkoxy group with between 2 and 25 recurring units derived from ethylene oxide, propylene oxide and/or butylene oxide and comprises homopolymers and statistical copolymers of at least two of the above compounds; and z is 1 or 2. The nonpolar part of compound (I) of the formula (II) contains at least 9 carbon atoms. The invention also relates to the preparation of such engine oils and to the use of alkyl alkoxylates of formula (I) for the reduction of deposit formation.Type: GrantFiled: June 18, 2001Date of Patent: October 1, 2002Assignee: Rohmax Additives GmbHInventors: Alexander Dardin, Klaus Hedrich, Stephan Massoth, Boris Eisenberg, Stephan Fengler
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Patent number: 6458749Abstract: A method for improving the low temperature fluidity of lubricating oil compositions based on addition to lubricating oils of a mixture of selected high molecular weight and low molecular weight alkyl (meth)acrylate copolymers is disclosed. Combinations of low molecular weight alkyl (meth)acrylate polymers containing zero to 25 weight percent (C16-C24)alkyl (meth)acrylate with high molecular weight alkyl (meth)acrylate polymers containing 25 to 70 weight percent (C16-C24)alkyl (meth)acrylate are especially effective at satisfying different aspects of low temperature fluidity properties simultaneously for a broad range of base oils.Type: GrantFiled: July 9, 2001Date of Patent: October 1, 2002Assignee: Rohmax Additives GmbHInventors: Bernard G. Kinker, Thomas A. Mc Gregor, Joan Marie Souchik
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Publication number: 20020123583Abstract: A method for making a viscosity index improving copolymer includes heating a reaction mixture including from about 55 weight percent to about 99.5 weight percent of a first monomer selected from the group consisting of (C8-C15)alkyl (meth)acrylates and mixtures thereof, from about 0.5 weight percent to about 45 weight percent of a second monomer selected from the group consisting of (C1-C7)alkyl (meth)acrylates, (C16-C24)alkyl(meth)acrylates and mixtures thereof, a polymerization initiator and a hydrocarbon diluent, to a reaction temperature from about 75° C. to about 100° C. and maintaining the reaction mixture at the reaction temperature for a period of time effective to allow copolymerization of the monomers.Type: ApplicationFiled: November 19, 2001Publication date: September 5, 2002Applicant: ROHMAX ADDITIVES GMBHInventors: Robert H. Gore, Bridget M. Stevens
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Patent number: 6409778Abstract: The invention relates to a copolymer consisting of the following monomer components: a) 48-98 wt. % of compounds of formula (I), b) 2-30 wt. % of one or several oxygen-containing methacrylates of formula (II) and c) 0-30 wt. % of a methacrylate of formula (III) of styrol, the quantities a)-c) totalling 100 wt. %. The inventive copolymer is suitable as a an additive for diesel fuels and biodiesel.Type: GrantFiled: June 28, 2000Date of Patent: June 25, 2002Assignee: Rohmax Additives GmbHInventors: Clemens Auschra, Joachim Vetter, Uwe Boehmke, Michael Neusius