Additives compositions useful in particular for improving the cold filterability properties of oil middle distillates
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United States of America Patent
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May 12, 1987
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N/A
app pub date -
Jul 10, 1985
filing date -
Jul 10, 1984
priority date (Note) -
Expired
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Abstract
Additive compositions, useful in particular for improving the cold filterability properties of oil middle distillates, comprise: (A) at least one ethylene polymer; and (B) at least one polymeric compound resulting from the condensation of at least one compound comprising a primary amine group, of formula R--Z[(CH.sub.2).sub.n NH].sub.m H or HO--CH.sub.2 --R'--NH.sub.2 wherein R is an alkyl from C.sub.1 to C.sub.30, Z is --NH--, --NR'-- or --O--, R' being a C.sub.1 -C.sub.30 alkyl, n an integrer from 2 to 4 , m an integrer from 1 to 4 (or zero when Z is --NH--), R' is a C.sub.1 -C.sub.18 alkylene, with a copolymer of a linear .alpha.-olefin, of an unsaturated .alpha., .beta.-dicarboxylic compound and of an alkyl ester of an unsaturated monocarboxylic acid, or a vinyl ester of a saturated monocarboxylic acid. These additive compositions, used for example at concentrations from 50 to 500 g/m.sup.3, have a synergic effect on the filterability limit temperature of the middle distillates, particularly gas-oils.
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