Thermal insulation gel with controlled crosslinking for petroleum hydrocarbon transmission lines
US6933341B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 4, 2002 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Feb 4, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J3/09
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to and uses, in order to prevent crude oil from “congealing” in a transportation line, a controlled-crosslinking thermal insulation gel, i.e. relatively fluid at the start and developing in-situ gelation in lines only under certain conditions, temperature conditions among other things. In order to obtain controlled crosslinking, it is possible to carry out 1) Physical crosslinkings, i.e. physical bonds between polymers—completely reversible bonds by thermal effect and/or mechanical shear—and 2) Chemical crosslinkings: monomers or polymers having functions allowing chemical bonds to be established between polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.