Abstract
A study was carried out on the technology of synthesizing water soluble phenol-formaldehyde resin (PFR) as crosslinker for weak polymer gels (WPG). The PFR prepared in two-step alkaline catalyzed polycondensation contained much less free formaldehyde and possessed much higher hydroxymethyl content, thus was superior to the one-step polycondensation product. For PFR of two-step technology, the viscosity increased continuously with increasing F/P molar ratio and all the relationships of HMC and of WPG viscosity. The optimum parameters of synthesis of PFR as crosslinker for WPG were obtained.
Original language | English |
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Pages (from-to) | 241-244, 261 |
Journal | Oilfield Chemistry |
Volume | 22 |
Issue number | 3 |
Publication status | Published - 25 Sept 2005 |
Keywords
- Heat resistant and salts tolerant system
- Profiling/flooding agent
- Synthesis
- Technologic parameters
- Water soluble phenolic resin
- Weak gel