Shear thickening compositions containing polyacrylic acid and polyacrylamide, their preparation and use
US4683953A · kind A · utility
7Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1985 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Mar 14, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/928
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The dispersed aqueous phase of a shear thickening composition, useful as a well control fluid which comprises a water-in-oil emulsion having hydratable, water-expandable hydrophillic clay, dispersed in the continuous, surfactant-containing oily phase thereof, hydratable, water-expandable hydrophillic clay, is prepared by mixing an aqueous solution of a polyacrylamide with an aqueous solution of polyacrylic acid wherein the concentration of the polymer in each separate solution used to prepare said aqueous phase is less than about 2 wt %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.