Multifunctional additive composition for cold process treatment of middle distillates
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United States of America Patent
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Sep 23, 2003
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N/A
app pub date -
Mar 25, 2002
filing date -
Apr 26, 1999
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Expired
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Abstract
The invention concerns a composition of mulifunctional additives for cold process treatment obtained by reacting carboxylic compounds with amine compounds, characterized in that it contains at least 50 wt. % of a mixture consisting of 10 to 90 wt. % of an additive (AB) of a carboxylic compound (A) selected among maleic and succinic anhydrides, corresponding acids and esters with a polyalkylamine (B) and 90 to 10 wt. % of an additive (CD) obtained by reacting a copolymer (C) obtained by reacting a first unsaturated carboxylic acid with an alkylated ester of a second unsaturated carboxylic acid, identical to or different from the first, of general formula (II) R.sub.1 R.sub.2 C.dbd.CR.sub.3 COOR.sub.4 wherein R.sub.1 and R.sub.2, identical or different, being hydrogen, a linear or branched C.sub.1 -C.sub.20 alkyl radical; R.sub.3 is hydrogen or a linear or branched alkyl group with not more than three carbon atoms and R.sub.4 is hydrogen or a C.sub.1 -C.sub.25 radical, with N-alkylpolyalkylenepolyamine (D).
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