Patent ID: 6846338

Claim:
A fuel oil middle distillate composition consisting of: A) a mineral oil having a cloud point of less than −8° C., a boiling range (90-20%) of less than 120° C., a 95% distillation point of less than 350° C. and a difference between CFPP and PP of less than 10° C., and B) a flow improver consisting of: 1) one or more copolymers present in an amount of 0.001 to 2% by weight, based on the weight of the oil, wherein the copolymers have melt viscosities of from 20 to 10,000 mPas at 140° C. and wherein the copolymers consist of a) and b): a) bivalent structural unit (B1) present in an amount of from 85 to 97 mol % wherein (B1) is a bivalent structural unit of formula (1) —CH 2 —CH 2 — (1) and b) one or more bivalent structural units (B2) present in an amount of from 3 to 15 mol %, (B2) is a bivalent structural unit of formula (2): —CH 2 —CR 1 R 2 — (2) in which R 1 is hydrogen or methyl, R 2 is COOR 3 , OR 3 or OCOR 3 , and R 3 is an alkyl radical having at least 4 and at most 30 carbon atoms, wherein the copolymers consist of from 0 to 4% by weight of vinyl acetate and of from 0 to 5% by weight of further comonomers except vinyl acetate; and wherein said fuel oil middle distillate contains other additives selected from the group consisting of dewaxing assistants, corrosion inhibitors, antioxidants, lubricity additives, sludge inhibiters, paraffin dispersants, vinyl acetate-containing terpolymers of ethylene, and mixtures, thereof.