Back to results
US 9,540,583 B2Granted
Additives for fuels and oils comprising Functionalised diblock copolmers
AssigneeInfineum International Limited
InventorsCarl Waterson, Kenneth Lewtas, Peter Scott, Christopher J. Kay, Giles W. Theaker, Peter M. Wright
Life of this patent
Estimating the term…
Abstract
Concentrates containing specific functionalized diblock copolymers serve as effective additives for improving the cold flow behavior of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.
Claims19
An additive concentrate comprising a functionalised diblock copolymer in admixture with an organic liquid miscible with fuel or oil, the copolymer comprising 2 polymeric blocks wherein:
- (i) the first block consists of a chain of ethylenic structural units, optionally interrupted by one or more structural units derived from 1-alkene co-monomers higher than ethylene, and
- (ii) the second block comprises a chain of structural units derived from one or more α,β-unsaturated monomers selected from styrene, substituted styrene, acrylate, methacrylate and diene compounds,
- and wherein said first and second blocks of the copolymer are terminally joined by the following structural linkage:
- wherein each R group independently represents an alkyl or aryl group and R′ represents hydrogen or an alkyl group, and wherein the aromatic ring substituent joined to the second block is positioned meta or para to the aromatic ring substituent joined to the first block.
1 more element
A diblock copolymer comprising:
- (i) a first block consisting of a chain of ethylenic structural units, optionally interrupted by one or more structural units derived from 1-alkene co-monomers higher than ethylene, and
- (ii) a second block comprising a chain of structural units derived from one or more α,β-unsaturated monomers selected from styrene, substituted styrene, acrylate, methacrylate and diene compounds,
- wherein said first and second blocks of the copolymer are terminally joined by means of the following structural linkage:
- wherein each R group independently represents an alkyl or aryl group and R′ represents hydrogen or an alkyl group, and wherein the aromatic ring substituent joined to the second block is positioned meta or para to the aromatic ring substituent joined to the first block.
1 more element
Dependencies are inferred from the claim text.