Patents by Inventor Alexander Dardin
Alexander Dardin 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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Patent number: 9080124Abstract: The invention relates to the use of graft polymers obtained by polymerization in two stages.Type: GrantFiled: June 23, 2005Date of Patent: July 14, 2015Assignee: EVONIK ROHMAX ADDITIVES GmbHInventors: Markus Scherer, Klaus Hedrich, Alexander Dardin, Michael Mueller, Torsten Stoehr, Boris Eisenberg
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Publication number: 20130219868Abstract: The present invention describes a motor designed for biodiesel compatibility comprising a particulate filter, a motor control unit being able to inject fuel to the engine in order to increase the exhaust temperature, and a lubricant composition, characterized in that the lubricant composition comprises at least one ester group containing polymer.Type: ApplicationFiled: October 28, 2011Publication date: August 29, 2013Applicant: Evonik Oil Additives GmbHInventors: Michael Alibert, Thorsten Bartels, Julien Couet, Alexander Dardin, Daniel H. Deneen, Brian Hess, Michael Mueller, Christian Daniel Georges Neveu, Gerhard Renner, Torsten Stoehr, Christoph Wincierz
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Patent number: 8288327Abstract: The invention relates to a lubricating oil composition with good frictional properties, the composition having a lubricating oil and at least one additive having friction-reducing properties. The additive with friction-reducing properties is a block copolymer having hydrophobic segments P and polar segments D. The hydrophobic segments are obtained by polymerization of monomer compositions having a) between 0 and 40 wt. %, in relation to the weight of the monomer compositions for producing the hydrophobic segments, of at least one ethylenically unsaturated ester compound of formula (I), in which R represents hydrogen or methyl, R1 represents a linear or branched alkyl radical having between 1 and 5 carbon atoms, and R2 and R3 independently represent hydrogen or a group of formula —COOR?, in which R? represents hydrogen or an alkyl group having between 1 and 5 carbon atoms.Type: GrantFiled: January 24, 2004Date of Patent: October 16, 2012Assignee: Evonik Rohmax Additives GmbHInventors: Alexander Dardin, Michael Mueller, Boris Eisenberg
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Patent number: 8288583Abstract: 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: GrantFiled: June 1, 2007Date of Patent: October 16, 2012Assignee: Evonik Rohmax Additives GmbHInventors: Uwe Boehmke, Klaus Schimossek, Detlef Bloos, Michael Neusius, Stephan Massoth, Guenther Graeff, Alexander Dardin, Matthias Fischer, Volker Stephan
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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: 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: 7452932Abstract: 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: GrantFiled: August 27, 2003Date of Patent: November 18, 2008Assignee: RohMax Additives GmbHInventors: Markus Scherer, Alexander Dardin, Wolfgang Tschepat, Stephan Massoth
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Publication number: 20080132663Abstract: 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: ApplicationFiled: August 1, 2005Publication date: June 5, 2008Applicant: 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: 20070213237Abstract: The invention relates to the use of graft polymers obtained by polymerization in two stages.Type: ApplicationFiled: June 23, 2005Publication date: September 13, 2007Applicant: ROHMAX ADDITIVES GMBHInventors: Markus Scherer, Klaus Hedrich, Alexander Dardin, Michael Muller, Thorsten Stoehr, Boris Eisenberg
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Publication number: 20060189490Abstract: The invention relates to a lubricating oil composition with good frictional properties, the composition having a lubricating oil and at least one additive having friction-reducing properties. The additive with friction-reducing properties is a block copolymer having hydrophobic segments P and polar segments D. The hydrophobic segments are obtained by polymerization of monomer compositions having a) between 0 and 40 wt. %, in relation to the weight of the monomer compositions for producing the hydrophobic segments, of at least one ethylenically unsaturated ester compound of formula (I), in which R represents hydrogen or methyl, R1 represents a linear or branched alkyl radical having between 1 and 5 carbon atoms, and R2 and R3 independently represent hydrogen or a group of formula —COOR?, in which R? represents hydrogen or an alkyl group having between 1 and 5 carbon atoms.Type: ApplicationFiled: January 24, 2004Publication date: August 24, 2006Inventors: Alexander Dardin, Michael Mueller, Boris Eisenberg
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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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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