Patents Assigned to Rohmax Additives GmbH
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Publication number: 20110319305Abstract: The present invention relates to the use of comb polymers comprising, in the main chain, repeat units derived from polyolefin-based macromonomers with a molecular weight of at least 500 g/mol, and repeat units derived from low molecular weight monomers with a molecular weight less than 500 g/mol, for improving the load-bearing capacity of hydraulic fluids. Furthermore, the present invention describes new hydraulic fluids.Type: ApplicationFiled: February 9, 2010Publication date: December 29, 2011Applicant: EVONIK ROHMAX ADDITIVES GMBHInventors: Boris Eisenberg, Roland Schweder, Michael Alibert, Torsten Stoehr
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Publication number: 20110306533Abstract: The invention relates to the use of comb polymers comprising repeating units in the main chain which repeating units are derived from polyolefin-based macromonomers having a molecular weight of at least 500 g/mol, and repeating units which are derived from low-molecular monomers having a molecular weight of less than 500 g/mol as antifatigue additives in lubricants. The invention further relates to novel comb polymers and methods for the production thereof and to lubricating oils comprising said comb polymers.Type: ApplicationFiled: February 25, 2010Publication date: December 15, 2011Applicant: Evonik Rohmax Additives GmbHInventors: Boris Eisenberg, Torsten Stoehr, Dieter Janssen, Miriam Kathrin Stihulka
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Publication number: 20110296743Abstract: The present invention relates to a fuel composition comprising at least one biodiesel fuel and comprising 0.05 to 5% by weight of at least one polymer comprising ester groups, which comprises repeat units derived from ester monomers having 16 to 40 carbon atoms in the alcohol radical, and repeat units derived from ester monomers having 7 to 15 carbon atoms in the alcohol radical, and the polymer comprising ester groups has a weight-average molecular weight in the range from 5000 to 100 000 g/mol. The present invention further describes the use of polymers comprising ester groups as flow improvers in fuel compositions which comprise at least one biodiesel fuel. Surprising advantages can be achieved especially with regard to the improvement of the cloud point and the low-temperature storability.Type: ApplicationFiled: December 29, 2009Publication date: December 8, 2011Applicant: EVONIK ROHMAX ADDITIVES GMBHInventors: Rene Koschabek, Yann D'Herve, Phil Hutchinson, Brian Hess, Sandra Kuenzel
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Patent number: 8067349Abstract: The invention relates to comb polymers which comprise, in the main chain, repeating units which are derived from polyolefin-based macromonomers, and repeating units which are derived from low molecular monomers which are selected from the group consisting of styrene monomers having 8-17 carbon atoms, alkyl(meth)acrylates having 1-10 carbon atoms in the alcohol group, vinyl esters having 1-11 carbon atoms in the acyl group, vinyl ethers having 1-10 carbon atoms in the alcohol group, (Di)alkylfumarates having 1-10 carbon atoms in the alcohol group, (Di)alkylmaleates having 1-10 carbon atoms in the alcohol group and mixtures of said monomers. The molar branching degree lies in the region between 0.1-10 mol. % and the comb polymer represents the sum of at least 80 wt.Type: GrantFiled: April 7, 2006Date of Patent: November 29, 2011Assignee: Evonik Rohmax Additives GmbHInventors: Torsten Stoehr, Boris Eisenberg, Michael Mueller
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Publication number: 20110237473Abstract: The present invention relates to the use of ester group-including polymers having at least one nonpolar segment P and at least one polar segment D, where the polar segment D includes at least 8 repeating units, and the proportion of dispersing repeating units in the polar segment D is at least 30% by weight based on the weight of the polar segment D, as antifatigue additive in lubricants.Type: ApplicationFiled: June 20, 2008Publication date: September 29, 2011Applicant: EVONIK ROHMAX ADDITIVES GMBHInventors: Torsten Stoehr, Michael Mueller, Thorsten Bartels, Christoph Wincierz, Klaus Schimossek, Michael Neusius, Dieter Janssen, Miriam-Kathrin Stihulka
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Publication number: 20110230378Abstract: The present invention relates to polymer dispersions comprising A) at least one dispersed polyolefin, B) at least one dispersion component, C) mineral oil and D) at least one glyceryl ester derived from an unsaturated carboxylic acid having from 8 to 30 carbon atoms. The inventive polymer dispersions are notable for very good low-temperature performance. In addition, the polymer dispersions can be prepared in a particularly energy-saving manner. The present invention further relates to processes for the preparation of and to the use of these polymer dispersions.Type: ApplicationFiled: February 13, 2008Publication date: September 22, 2011Applicant: EVONIK ROHMAX ADDITIVES GMBHInventors: Thomas Schimmel, Wolfgang Tschepat, Stephan Fengler
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Patent number: 8021885Abstract: The present invention concerns a method for the determination of the oxidative stability of a lubricating fluid, comprising the steps of: introducing a sample of the lubricating fluid under test in an reaction cell; introducing catalytic amounts of a catalyst to the reaction cell; heating the cell to the oxidation temperature of the lubricating fluid and maintaining this temperature; delivering oxygen containing gas at constant flow rate through the cell over the course of the reaction; delivering a gas comprising nitrogen dioxide at a constant flow rate through the cell for a specified time; applying and maintaining a specified vacuum on the reaction cell; allowing the mixture to react for a specified time; measuring the viscosity of the oxidized lubricating fluid. Additionally, the present invention describes an apparatus for the determination of the oxidative stability of a lubricating fluid.Type: GrantFiled: October 11, 2006Date of Patent: September 20, 2011Assignee: Evonik Rohmax Additives GmbHInventors: Bernard Kinker, Raymond Romaszewski
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Patent number: 8012919Abstract: 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: GrantFiled: June 29, 2009Date of Patent: September 6, 2011Assignee: Evonik 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: 20110192076Abstract: The present invention describes a fuel oil composition comprising at least one biodiesel oil and at least one additive for improving the filterability.Type: ApplicationFiled: February 5, 2010Publication date: August 11, 2011Applicant: EVONIK ROHMAX ADDITIVES GMBHInventors: Brian HESS, Robert Cybert, Marie Malitsky, Frank-Olaf Maehling, Rene Koschabek, Ronny Sondjaja
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Patent number: 7981848Abstract: The present invention relates to the use of a polyalkylmethacrylate polymer to improve the air release of a functional fluid.Type: GrantFiled: December 1, 2009Date of Patent: July 19, 2011Assignee: Evonik Rohmax Additives GmbHInventors: Douglas G. Placek, Christian D. Neveu, Roland Schweder, Robert P. Simko, Charles W. Hyndman
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Publication number: 20110162723Abstract: Noise generation in a hydraulic system is reduced by contacting a hydraulic fluid comprising a polyalkyl(meth)acrylate polymer with a hydraulic system.Type: ApplicationFiled: October 1, 2009Publication date: July 7, 2011Applicant: Evonik Rohmax Additives GMBHInventors: Douglas G. Placek, Christian Daniel Georges Neveu, Steven Neil Herzog
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Publication number: 20100190671Abstract: The present invention relates to the use of comb polymers comprising, in the main chain, repeat units which are derived from polyolefin-based macromonomers, and repeat units which are derived from low molecular weight monomers selected from the group consisting of styrene monomers having 8 to 17 carbon atoms, alkyl (meth)acrylates having 1 to 10 carbon atoms in the alcohol group, vinyl esters having 1 to 11 carbon atoms in the acyl group, vinyl ethers having 1 to 10 carbon atoms in the alcohol group, (di)alkyl fumarates having 1 to 10 carbon atoms in the alcohol group, (di)alkyl maleates having 1 to 10 carbon atoms in the alcohol group and mixtures of these monomers, where the molar degree of branching is in the range of 0.Type: ApplicationFiled: April 10, 2008Publication date: July 29, 2010Applicant: EVONIK ROHMAX ADDITIVES GMBHInventors: Torsten Stoehr, Dieter Janssen, Juergen Schnabel, Boris Eisenberg, Hans Goerlitzer, Michael Mueller
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Publication number: 20100167970Abstract: The invention relates to a polymer comprising 50-100% by weight, with regard to the weight of the polymers, of repeating units, which are derived from one or more ethylenically unsaturated ester compounds of formula (I), in which R represents hydrogen or methyl; R1 represents a linear or unbranched alkyl radical with 7 to 30 carbon atoms, and; R2 and R3 independently represent hydrogen or a group of formula —COOR?, wherein R? represents hydrogen or an alkyl group with 7 to 30 carbon atoms. The polymer is a star polymer with 3 to 21 arms and at least 3 of the arms consist of at least 40% by weight, with regard to the weight of the arms, of repeating units, which are derived from one or more ethylenically unsaturated ester compounds of formula (I), in which R1 represents a linear or unbranched alkyl radical with 7 to 30 carbon atoms, and; R2 and R3 independently represent hydrogen or a group of formula —COOR?, wherein R? represents hydrogen or an alkyl group with 7 to 30 carbon atoms.Type: ApplicationFiled: August 4, 2006Publication date: July 1, 2010Applicant: EVONIK ROHMAX ADDITIVES GMBHInventors: Torsten Stoehr, Michael Mueller, Boris Eisenberg, Harald Becker, Axel Mueller
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Publication number: 20100144569Abstract: The present invention relates to the use of a polyalkylmethacrylate polymer to improve the air release of a functional fluid.Type: ApplicationFiled: December 1, 2009Publication date: June 10, 2010Applicant: ROHMAX ADDITIVES GMBHInventors: Douglas G. Placek, Christian D. Neveu, Roland Schweder, Robert P. Simko, Charles W. Hyndman
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Patent number: 7728093Abstract: 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: GrantFiled: February 14, 2003Date of Patent: June 1, 2010Assignee: Evonik Rohmax Additives GmbHInventors: Markus Scherer, Michael Mueller, Jean-Luc Herbeaux, Dieter Janssen, Melanie Croessmann
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Patent number: 7648950Abstract: The present invention relates to the use of a polyalkylmethacrylate polymer to improve the air release of a functional fluid.Type: GrantFiled: April 22, 2005Date of Patent: January 19, 2010Assignee: Rohmax Additives GmbHInventors: Douglas G. Placek, Christian D. Neveu, Roland Schweder, Robert P. Simko, Charles W. Hyndman
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Patent number: 7645842Abstract: The invention relates to a method for radical polymerization of one or several ethylenically unsaturated compounds, characterized in that it consists in providing at least 80.8 percent by weight ethylenically unsaturated compounds in relation to the total weight of the ethylenically unsaturated compounds, adding at least one polymerization initiator for radical polymerization in at least two steps, wherein more polymerization initiator is added in the second step than in the first.Type: GrantFiled: August 1, 2005Date of Patent: January 12, 2010Assignee: Rohmax Additives GmbHInventors: Francois Acker, Markus Scherer, Alexander Dardin, Stephan Massoth, Bernd Amrhein, Detlef Bloos, Valerie Dittgen, Alain Roos, Jean-Marc Beiner
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Publication number: 20090270287Abstract: 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: June 29, 2009Publication date: October 29, 2009Applicant: 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: 20090182145Abstract: The present invention relates to processes for preparing carboxylic acid derivatives, comprising the reaction of at least one carboxylic acid and/or of a carboxylic acid derivative with at least one alcohol and/or an amine in the presence of a metal-containing catalyst, wherein, after the reaction has ended, the metal-containing catalyst is contacted with water and a superabsorbent, the contacting of the catalyst with the water leading to hydrolysis of the catalyst. The present invention further relates to the use of superabsorbents for removing a metal-containing catalyst from a mixture after hydrolysis of the catalyst.Type: ApplicationFiled: June 1, 2007Publication date: July 16, 2009Applicant: EVONIK ROHMAX ADDITIVES GMBHInventors: Uwe Böhmke, Klaus Schimossek, Detlef Bloos, Michael Neusius, Stephan Massoth, Günther Gräff, Alexander Dardin, Matthias Fischer, Volker Stephan
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Patent number: 7560420Abstract: 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.Type: GrantFiled: December 23, 2004Date of Patent: July 14, 2009Assignee: RohMax Additives GmbHInventors: Bernard Kinker, Matthias Fischer, Martin Bollinger, Robert Cybert, Ernst Bielmeier, David Cooper, Angelika Fischer, Melanie Croessmann