Methods and compositions for improvement of low temperature fluidity of
fuel oils

    公开(公告)号:US5772706A

    公开(公告)日:1998-06-30

    申请号:US928289

    申请日:1997-09-12

    Abstract: Adding to a fuel oil a composition of from about 1 to about 40 parts by weight ethylene/vinyl acetate copolymer having a vinyl acetate content of from about 10% by weight to about 50% by weight and a weight average molecular weight of from about 2,000 to about 10,000, and 1 part by weight esterified copolymer of at least one generally linear .alpha.-olefin of from about 18 to about 50 carbon atoms and maleic anhydride in an .alpha.-olefin to maleic anhydride molar ratio of from about 4:1 to about 1:2, the copolymer having a weight average molecular weight of from about 2,000 to about 20,000, the esterified copolymer having been esterified with a plurality of aliphatic alcohols having from about four to about forty carbon atoms, imparts to the fuel oil surprisingly improved low temperature fluidity, provided that the alcohols include an eight carbon alcohol making up from about 50 to about 85 molar percent of the alcohols.

    Fuel compositions containing polyalkyl and poly(oxyalkylene)aromatic
esters
    48.
    发明授权
    Fuel compositions containing polyalkyl and poly(oxyalkylene)aromatic esters 失效
    含有聚烷基和聚(氧化烯)芳族酯的燃料组合物

    公开(公告)号:US5538521A

    公开(公告)日:1996-07-23

    申请号:US173802

    申请日:1993-12-23

    Abstract: A fuel additive having the formula: ##STR1## wherein A.sub.1 is a thioether, a sulfoxide, a sulfone, a sulfonic acid, a sulfonamide, a nitrile, a carboxylic acid or ester, or a carboxamide; R.sub.1 and R.sub.2 are independently hydrogen, hydroxy, lower alkyl or lower alkoxy; R.sub.3 and R.sub.4 are independently hydrogen or lower alkyl; n is an integer from 0 to 100; and when n is 0 to 10, R.sub.5 is polyalkyl having an average molecular weight of 450 to 5,000; and when n is 5 to 100, R.sub.5 is hydrogen, alkyl, phenyl, aralkyl, alkaryl or an acyl group having the formula: ##STR2## wherein R.sub.6 is alkyl, phenyl, aralkyl or alkaryl; R.sub.7 and R.sub.8 are independently hydrogen, hydroxy, lower alkyl or lower alkoxy; A.sub.2 is a thioether, a sulfoxide, a sulfone, a sulfonic acid, a sulfonamide, a nitrile, a carboxylic acid or ester, or a carboxamide; and x and y are independently integers from 0 to 10; with the proviso that when n and x are both 0, then A.sub.1 may not be a carboxylic acid or ester, or a carboxamide.

    Abstract translation: 一种具有下式的燃料添加剂:其中A1是硫醚,亚砜,砜,磺酸,磺酰胺,腈,羧酸或酯或羧酰胺; R1和R2独立地是氢,羟基,低级烷基或低级烷氧基; R3和R4独立地是氢或低级烷基; n是0至100的整数; 当n为0〜10时,R 5为平均分子量为450〜5000的聚烷基; 当n为5至100时,R 5为氢,烷基,苯基,芳烷基,烷芳基或具有下式的酰基:其中R 6为烷基,苯基,芳烷基或烷芳基; R7和R8独立地是氢,羟基,低级烷基或低级烷氧基; A2是硫醚,亚砜,砜,磺酸,磺酰胺,腈,羧酸或酯或羧酰胺; 且x和y独立地为0至10的整数; 条件是当n和x均为0时,则A1可以不是羧酸或酯或羧酰胺。

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