| abstract |
A compound of the general formula in which Y is SO3<(-)(+)>NR<3>, SO2NR<3>- or SO<3>; X is Y or -CON(R<3>)-, -CO2<(-)>, <(+)>NR<3->-, -R<4->-CO.O-, -NR<3>CO-, R<4>O-, -R<4>O CO-,-N(COR<3>)- or <(+)>NR<3>3Z<(-)>-; Z<(-)> is -SO<3(-)> or -CO<2(-)>; R<1> and R<2> are alkyl, alkoxy alkyl or polyalkoxy alkyl containing at least 10 carbon atoms in the main chain; R<3> is hydrocarbyl and may be the same or different and R<4> nothing or is C1 to C5 alkylene and in the carbon-carbon (C-C) bond is either a) ethylenically unsaturated when A and A may be alkyl, alkenyl or substituted hydrocarbyl groups or b) part of a cyclic structure which may be aromatic, polynuclear aromatic or cyclo-aliphatic. The compounds may be added to distillate fuels as wax crystal modifiers. |