POLYMERS

摘要

The present invention is a polymer having structural units, units of formula I, units of formula II and units of either formula IIIa or formula IIIb:;;The polymer improves the low-temperature properties of fuel oils from petroleum sources and especially from vegetable or animal sources.

主权项

1. A polymer comprising structural units of formula I, structural units of formula II and structural units of formula IIIb: wherein R1 and R2 are the same or different and each represent a C8 to C22 alkyl group, preferably a C12 to C16 alkyl group; wherein R3 represents —OCOR6, —COOR15, —COOH, or a C1 to C22 alkyl group, preferably a C1 to C12 alkyl group, and R6 represents a C1 to C22 alkyl group, preferably a C1 to C12 alkyl group; wherein R4 is hydrogen, —COOH or —CH2COOR16; wherein R15 and R16 are the same or different and each represent a C8 to C22 alkyl group, preferably a C12 to C16 alkyl group; wherein Y represents a group of formula IV: wherein R7 represents hydrogen or a C1 to C8 alkyl group, R8 represents a C1 to C8 alkyl group, m is an integer from 1 to 10, and n is an integer from 1 to 30, preferably from 5 to 20.