NEW VISCOSITY INDEX IMPROVERS WITH DEFINED MOLECULAR WEIGHT DISTRIBUTIONS

The present invention is directed to polyalkyl(meth)acrylate based comb polymers with weight-average molecular weights of 700.000 g/mol or greater and number-average molecular weights of 130.000 g/mol or greater, their preparation, lubricant compositions comprising such comb polymers and their use t...

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Bibliographische Detailangaben
Hauptverfasser:	Schimossek, Klaus, Schöller, Katrin, Tschepat, Wolfgang, Lippert, Sarah
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON FUELS LUBRICANTS LUBRICATING COMPOSITIONS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PEAT PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MONOXIDE THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Beschreibung
Zusammenfassung:	The present invention is directed to polyalkyl(meth)acrylate based comb polymers with weight-average molecular weights of 700.000 g/mol or greater and number-average molecular weights of 130.000 g/mol or greater, their preparation, lubricant compositions comprising such comb polymers and their use to improve the high temperature-high shear performance of lubricant compositions, especially of engine oil (EO) compositions.