Composition of additives, comprising at least one copolymer, one cold-flow improver and one anti-settling additive

Abstract

The present invention relates to a composition of additives, comprising: at least one copolymer having at least one motif of formula (I) and at least one motif of formula (II); at least one cold-flow improver selected from the copolymers of ethylene and unsaturated ester(s); and at least one anti-settling and/or paraffin dispersant additive.

1 . A composition of additives comprising:
 at least one copolymer comprising:   at least one unit having the following formula (I):   
       
         
           
           
               
               
           
         
       
       in which 
       R 1  represents a hydrogen atom or a methyl group, 
       X represents —O—CO—, or —CO—O— or —NH—CO— or —CO—NH—, and 
       R 2  represents a C 6  to C 24  alkyl group; and
 at least one unit having the following formula (II): 
 
       
         
           
           
               
               
           
         
       
       in which 
       R represents a C 2  to C 34  group, comprising at least one nitrogen heterocycle;
 at least one cold flow improver chosen from the copolymers of ethylene and of unsaturated ester(s); 
 at least one anti-settling additive and/or paraffin dispersant. 
 
     
     
         2 . The composition according to  claim 1 , characterised in that the group R contains at least one nitrogen heterocycle having from one to three nitrogen atoms, more preferably two nitrogen atoms, even more preferably the group R is chosen from the following cycles: a substituted or non-substituted imidazole cycle, a substituted or non-substituted triazole cycle, a substituted or non-substituted pyrrolidone cycle; and even more preferably the group R is a substituted or non-substituted imidazole cycle. 
     
     
         3 . The composition according to  claim 1 , characterised in that said copolymer contains only units having the formula (I) and units having the formula (II). 
     
     
         4 . The composition according to  claim 1 , characterised in that said copolymer is a statistical copolymer, or a block copolymer, and preferably said copolymer is a statistical copolymer. 
     
     
         5 . The composition according to  claim 1 , characterised in that it comprises from 0.1 to 30% by weight of said copolymer, preferably from 1 to 20% by weight, more preferably from 2 to 10% by weight relative to the total weight of the composition of additives. 
     
     
         6 . The composition according to  claim 1 , characterised in that it comprises from 50 to 90% by weight of said cold flow improver, preferably from 60 to 90% by weight, more preferably from 70 to 90% by weight relative to the total weight of the composition of additives. 
     
     
         7 . The composition according to  claim 1 , characterised in that it comprises from 1 to 50% by weight of said anti-settling additive and/or of said paraffin dispersant, preferably from 2 to 30% by weight, more preferably from 5 to 20% by weight relative to the total weight of the composition of additives. 
     
     
         8 . The composition according to  claim 1 , characterised in that the cold flow improver is chosen from the copolymers of ethylene and of vinyl and/or acrylic ester(s), preferably from the copolymers of ethylene and of vinyl ester(s), more preferably from the ethylene/vinyl acetate copolymers, the ethylene/vinyl propionate copolymers and the terpolymers of ethylene, of vinyl acetate and of another vinyl ester, even more preferably the ethylene/vinyl acetate copolymers and their mixtures with a terpolymer of ethylene, of vinyl acetate and of another vinyl ester, in particular such as vinyl neodecanoate. 
     
     
         9 . The composition according to  claim 1 , characterised in that the anti-settling additive is chosen from the group consisting of the (meth)acrylic acid/alkyl (meth)acrylate copolymers amidified by a polyamine, the polyamine alkenylsuccinimides, the derivatives of phthalamic acid and of two-chain fatty amine, the products of condensation of one or more carboxylic acids with one or more polyamines, modified alkylphenol-aldehyde resins and optionally grafted alkylphenol resins, preferably the alkylphenol resins and the grafted alkylphenol resins. 
     
     
         10 . A use, to improve the cold resistance properties of a fuel or combustible composition, of the composition of additives as defined in  claim 1 . 
     
     
         11 . The use according to  claim 10 , characterised in that the fuel or combustible composition is chosen from the diesel fuels, the biodiesels, the diesel fuels of the B x  type containing x % (v/v) of esters of vegetable or animal oils or of fatty acids, the hydrogenated vegetable oils, and the fuel oils such as the heating oils. 
     
     
         12 . The use according to  claim 10  to lower the cold filter plugging point measured according to the standard NF EN 116 and/or the pour point measured according to the standard ASTM D 7346, and/or to delay or prevent the settling of crystals, and preferably to lower the cold filter plugging point measured according to the standard NF EN 116. 
     
     
         13 . A concentrate of additives comprising a composition of additives as defined in  claim 1 , in a mixture with an organic liquid. 
     
     
         14 . A fuel or combustible composition, comprising:
 (1) at least one cut of hydrocarbons coming from one or more sources chosen from the group consisting of the mineral, animal, plant and synthetic sources, and   (2) at least one composition of additives as defined in  claim 1 .   
     
     
         15 . A fuel according to  claim 14 , characterised in that it contains the copolymer(s) in a concentration of at least 0.0001% by weight, preferably in a concentration ranging from 0.0001 to 0.01% by weight, more preferably from 0.0002 to 0.005% by weight relative to the total weight of the composition.