VISCOSITY INDEX IMPROVER FOR LUBRICANTS BASED ON POLYISOBUTYLENEPHENYL ACRYLATE COMB COPOLYMERS

The present invention relates to a comb copolymer comprising in polymerized form a PIB macromonomer of the formula (I) and an acrylate monomer of the formula (II). The invention further relates to a method of preparing the PIB macromonomer of the formula (I) where a polyisobutene phenol of the formu...

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Bibliographische Detailangaben
Hauptverfasser:	GARCIA CASTRO, Ivette, KOSCHABEK, Rene, FLECKENSTEIN, Christoph, MISSKE, Andrea
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY FUELS LUBRICANTS LUBRICATING COMPOSITIONS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MONOXIDE USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Beschreibung
Zusammenfassung:	The present invention relates to a comb copolymer comprising in polymerized form a PIB macromonomer of the formula (I) and an acrylate monomer of the formula (II). The invention further relates to a method of preparing the PIB macromonomer of the formula (I) where a polyisobutene phenol of the formula (III) is reacted with (meth)acrylic acid anhydride; and to a lubricant comprising a base oil, the comb copolymer, and further lubricant additives; and to a use of the comb copolymer for improving the viscosity index of a lubricating oil.