PROCESS FOR PREPARING LOW SULFUR DISPERSANT POLYMERS

The present invention relates to a process for preparing grafted polyalkyl(meth)acrylates (PAMAs) containing dispersant repeating units in the polymer backbone as well as in the grafted layer, which polymers are characterized by a low sulfur content, the products available by this process and their...

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Bibliographische Detailangaben
Hauptverfasser:	HESS, BRIAN, GOKHALE, RHISHIKESH, MAHLING, FRANK-OLAF, LANGSTON, JUSTIN AUGUST, VOLTZ, BARBARA, DUCKWORTH, MICHAEL G
Format:	Patent
Sprache:	eng ; fre
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 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
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Beschreibung
Zusammenfassung:	The present invention relates to a process for preparing grafted polyalkyl(meth)acrylates (PAMAs) containing dispersant repeating units in the polymer backbone as well as in the grafted layer, which polymers are characterized by a low sulfur content, the products available by this process and their use as an additive to fuels, especially to middle distillates and blends thereof. The present invention further relates to a composition comprising the grafted polyalkyl(meth)acrylates prepared by the process according to the present invention and the use of said composition as an additive component to fuels, especially to middle distillates and blends thereof, and for improving the cold flow properties of fuel oil and fuel oil compositions, especially to middle distillate fuels and blends thereof. La présente invention concerne un procédé de préparation de (méth)acrylates polyalkyliques greffés contenant des motifs répétés de dispersant dans le squelette des polymères ainsi que dans la couche greffée, lesdits polymères étant caractérisés par une faible teneur en soufre, les produits obtenus par ce procédé et leur utilisation comme additifs pour carburants, particulièrement leurs distillats et mélanges intermédiaires. La présente invention concerne en outre une composition comprenant les (méth)acrylates polyalkyliques greffés préparés par le procédé de la présente invention et l'utilisation de ladite composition comme additif pour carburants, particulièrement leurs distillats et mélanges intermédiaires, et pour améliorer les propriétés de fluage du fioul et des compositions à base de fioul, particulièrement leurs distillats et mélanges intermédiaires.