Additive compositions

Details Additive compositions Additive compositions

C - Chemistry, Metallurgy

10

L

C10L 1/14 (2006.01) C10L 1/16 (2006.01) C10L 1/18 (2006.01) C10L 1/22 (2006.01)

Patent

CA 2404646

Additive compositions comprising: (i) at least one oil-soluble hydrogenated block diene polymer, comprising at least one crystallizable block, obtainable by end-to-end polymerization of a linear diene, and at least one non-crystallizable block, the non- crystallizable block being obtainable by 1,2-configuration polymerization of a linear diene, by polymerization of a branched diene, or by a mixture of such polymerizations, (ii) at least one ethylene-unsaturated ester compound; and (iii) at least one comb polymer. The additive compositions are used to improve cold flow characteristics in fuel oils. The additive compositions are particularly effective in fuel oils having a 90- 20% boiling temperature range, as measured in accordance with ASTM D-86, of more than i 15°C, preferably more than 120°C, more preferably more than 130°C, and most preferably more than 140°C, and a final boiling point of more than 370°C, preferably more than 380°C, and most preferably more than 390°C.

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