Melamine/formaldehyde cross-linking of polymers for profile control
US4787451A · kind A · utility
35Cited by
16References
16Claims
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Key dates
| Filing date | Dec 11, 1986 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Dec 11, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/512
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved process for forming improved gels where biopolymers and synthetic polymers are cross-linked with melamine/formaldehyde and other amino resins at an optimal range of ratios of amine to aldehyde in the amino resins. This optimal range of ratios can vary from about 1:6 to about 1:30 amine to aldehyde. Resins utilized in said optimal range are most effective for producing improved firm, stable gels. The resultant gels are useful in waterflooding and carbon dioxide flooding operations during the recovery of hydrocarboneaceous fluids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.