Grafted ethylene polymers usable more especially as additives for inhibiting the deposition of paraffins in crude oils and compositions containing the oils and said additives
US4608411A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1985 |
| Grant date | Aug 26, 1986 |
| Priority date | — |
| Expiry date | Oct 23, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L1/195
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides grafted ethylene copolymers usable more especially as additives for inhibiting the depositions in crude oils. Said copolymer being formed of ethylene and at least one monomer with ethylenic unsaturation, chosen from vinyl esters of C.sub.2 to C.sub.18 monocarboxylic acids, the alkyl esters in the C.sub.1 to C.sub.12 range of unsaturated monocarboxylic acids from the C.sub.3 to C.sub.12 range and the .alpha., .beta.-unsaturated dicarboxylic compounds, on which are fixed the grafts of a homo or copolymer of an .alpha., .beta.-unsaturated monocarboxylic acid ester with at least one alkanol of a chain length equal to or greater than C.sub.12 and at least 20% of which is of a chain length equal to or greater than C.sub.22. Such copolymers may be used more especially as additives for inhibiting the deposition of paraffins and for improving the flow properties of the crude oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.