| 摘要 |
PCT No. PCT/GB91/00623 Sec. 371 Date Oct. 13, 1992 Sec. 102(e) Date Oct. 13, 1992 PCT Filed Apr. 19, 1991 PCT Pub. No. W091/16297 PCT Pub. Date Oct. 31, 1991 <IMAGE> (I) Compounds of general formula (I) wherein X and Y are the same or different and are selected from the group consisting of SO3(-), -CO-, -C(O)O(-), -R4-C(O)O-, -NR3C(O)-, -R4O-, -R4-C(O)O-, -R4- and -NC(O)-, R4 being -(CH2)m- where m is from 0 to 5 and R3 is defined below; X1 and Y1 are the same or different and are selected from the group consisting of (a), R1 and R2 being independently selected from the group consisting of alkyl, alkoxy alkyl or polyalkoxyalkyl groups that contain at least 10 carbon atoms in their main chain, and R3 being a hydrocarbyl group, each R3 in a compound of formula (I) being the same of different; A is, together with the carbon atoms with which it constitutes the ring structure in formula (I), an aromatic, non-aromatic, or aliphatic group, where any of such groups can be mono- or polycyclic and/or can include one or more hetero atoms selected from nitrogen, sulphur and oxygen; and Z is selected from nitro, hydroxy, alkyl, alkoxy, carboxy acid and carboxy ester, and their use as low temperature flow improvers for distillate fuels.
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