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US 8,710,168 B2Granted
Polymers
AssigneeInfineum International Limited
InventorsCarl Waterson, Christopher J. Booth
Life of this patent
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Abstract
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.
Claims7
A polymer comprising structural units of formula I, structural units of formula II and structural units of formula IIIa:
- wherein R1 and R2 are the same or different and each represent a C8 to C22 alkyl group;
- wherein R3 represents —OCOR6, —COOR15, —COOH, or a C1 to C22 alkyl group, and R6 represents a C1 to C22 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;
- wherein R5 is hydrogen or methyl;
- wherein X 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.
4 more elements
Dependencies are inferred from the claim text.