Dendritic comb-shaped polymer thickening agent, preparaton of the same and application thereof
US8822389B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2010 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Nov 7, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F222/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a dendritic comb-shaped polymer thickening agent and preparation and application thereof; it is a copolymer obtained by copolymerization of monomer (A) and monomer (B). Monomer (A) is one or more water-soluble unsaturated monomers with olefin chain, and monomer (B) is at least one monomer with the following general structure:wherein R1, R2 is selected from H or C1˜C12 alkyl group, respectively; R3, R4, R5 is selected from H or C1˜C8 alkyl group, C1˜C8 alkylaryl group, C1˜C8 alkyl ether or C1˜C8 alkyl ester group, respectively; A′ is selected from COO− or OH. The content of the monomer (A) is 70˜99.99% of the total mass of the monomer (A) and the monomer (B), and the content of monomer (B) is 0.01˜30% of the total mass of the monomer (A) and the monomer (B). The viscosity of the polymer solution with the present polymer is 30% higher than that with common polyacrylamide and it is used in polymer flooding for oil reservoir with permeability lower than 400 mD in oilfields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.