ASHLESS DISPERSANT POLY(METH)ACRYLATE POLYMERS AND PROCESS FOR PRODUCING OF SAID POLYMERS

This invention is concerned with a polymer useful as an ashless dispersant additive which provides a combination of dispersancy, good cold cranking engine start-up, low-temperature viscosity properties and neutral behaviour towards fluoropolymer engine seal materials, and is obtainable by polymerisi...

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Bibliographische Detailangaben
Hauptverfasser:	LAI,CHUNG-YIN, NAPLES,JOHN OTTO
Format:	Patent
Sprache:	eng
Schlagworte:	ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL CHEMISTRY COMPOSITIONS BASED THEREON FIRELIGHTERS FUELS FUELS NOT OTHERWISE PROVIDED FOR LIQUEFIED PETROLEUM GAS LUBRICANTS LUBRICATING COMPOSITIONS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY NATURAL GAS ORGANIC MACROMOLECULAR COMPOUNDS PEAT PETROLEUM, GAS OR COKE INDUSTRIES SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K 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:	This invention is concerned with a polymer useful as an ashless dispersant additive which provides a combination of dispersancy, good cold cranking engine start-up, low-temperature viscosity properties and neutral behaviour towards fluoropolymer engine seal materials, and is obtainable by polymerising one or more alkyl methacrylate with one or more hydroxy-alkyl methacrylate while controlling the relative weight ratio of the component monomers to obtain an appropriate carbon atom content in the alkyl side chain portion of the methacrylate backbone polymer to achieve desired additive solubility properties.