Evonik Rohmax Additives Gmbh

Evonik Degussa Gmbh

Rohmax Additives Gmbh

Evonik Oil Additives Gmbh

Li-tec Battery Gmbh

Klaus Hedrich

Markus Scherer

Michael Mueller

Boris Eisenberg

Alexander Dardin

Andreas Gutsch

Torsten Stoehr

Sven Augustin

Wolfgang Tschepat

Roland Schweder

Stephan Massoth

Uwe Paulmann

Michael Müller

Stephan Fengler

Andreas Fuchs

Guenter Eichinger

Michael Alibert

Günter Eichinger

The invention relates to the use of graft polymers obtained by polymerization in two stages. In a first stage, at least one graft basis is produced by radically polymerizing a monomer composition A) containing 0 to 40 percent by weight of one or several ethylenically unsaturated ester compounds of formula (I), wherein R represents hydrogen or methyl, Rrepresents a linear or branched alkyl radical comprising 1 to 5 carbon atoms, Rand Rindependently represent hydrogen or a group of formula &#x2014;COOR', wherein R&#x2032; represents hydrogen or an alkyl group comprising 1 to 5 carbon atoms, 60 to 100 percent by weight of one or several ethylenically unsaturated ester compounds of formula (II), wherein R represents hydrogen or methyl, Rrepresents a linear or branched alkyl radical comprising 6 to 40 carbon atoms, Rand Rindependently represent hydrogen or a group of formula &#x2014;COOR&#x2032;, wherein R&#x2032; represents hydrogen or an alkyl group comprising 6 to 40 carbon atoms, and 0 to 40 percent by weight of comonomers, the percentages being relative to the weight of monomer composition A). In a second stage, a monomer composition B) containing 20 to 100 percent by weight of at least one monomer that comprises at least one nitrogen-containing group is grafted onto the graft basis in order to reduce wear in lubricant oil compositions. Said graft polymer comprises a maximum of 200 ppm of sulfur while the weight ratio between monomer composition A) and monomer composition B) ranges between 99.7:0.3 and 80:20.

Use of graft polymers

The invention relates to the use of polyalkyl ester for reducing the temperature in a lubricating oil composition. The polyalkyl ester has a specific viscosity &#x3b7;of between 5 and 30 ml/g, measured in chloroform at 25&#xb0; C.

Use of polyalkyl (meth)acrylates in lubricating oil compositions

The invention relates to a battery pack () for electric vehicles or vehicles with an electric hybrid drive. The battery pack () according to the invention comprises a battery housing () and battery cells, which are arranged within the battery housing (), are self-contained and are electrically connected to one another in order to achieve a desired terminal voltage. A plurality of battery cells are in each case arranged at a distance from one another in a fastening frame () and in each case form cell modules (). The cell modules () are in each case arranged on fastening elements, which pass through the battery housing (), the fastening elements, being in the form of spacers between the cell modules () and, with the battery housing (), forming a bearing unit.

Battery pack

The invention relates to graft copolymers produced by radically polymerizing polymerisable monomers and, in addition comprising long-chain ethylenically unsaturated compounds which contain alkyl substitutes, in particular acrylates or methacrylates and monomers with hydrogen bridge donator functions. According to said invention, said hydrogen bridge donator monomer is introduced into a polymer backbone and into graft side branches. The inventive polymers are particularly usable for lubricating oil formulations.

Polymers with h-bridge forming functionalities

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.

Engine oil composition with reduced deposit-formation tendency

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Fischbachtal, Germany

Klaus Hedrich