POLYMER MIXTURE FOR IMPROVING LUBRICITY OF INTERMEDIATE DISTILLATE

摘要

PROBLEM TO BE SOLVED: To obtain an additive which disperses paraffin crystals appearing at low temperatures in an intermediate distillate substantially not containing sulfur and aromatic compounds and prevents the crystals from settling by incorporating a polar nitrogen compound and a copolymer of ethylene and a hydroxylated olefinically unsaturated monomer, each in a specified amount, into the same. ;SOLUTION: A copolymer of ethylene and at least one olefinically unsaturated monomer having at least one OH group in an amount of 10-90 wt.% and at least one polar nitrogen compound in an amount of 90-10 wt.% are incorporated. The olefinically unsaturated monomer is preferably selected from among 3-30C hydroxyalkenes and monomers represented by the formulas: CH2=CH-OCOR1, CH2=CR2-COOR3, and CH2=CH-OR4. In the formulas, R1, R3, and R4 are each 1-30C hydroxyalkyl or corresponding hydroxyoxyalkyl; and R2 is H or CH3. A reaction product of dodecenylspirobislactone with a mixture of primary and secondary tallow amines is an example of the polar nitrogen compound.;COPYRIGHT: (C)2000,JPO