| 主权项 |
1. A method of performing an oil field application comprising using a water-soluble polymer in the oil field application, wherein the water-soluble polymer is anionic, is partially or totally neutralized with at least one organic counter-ion, is obtainable from a polymerization mixture containing at least one non-ionic monomer and at least one anionic monomer, wherein more than 1% of the anionic groups present in the polymer are neutralized with said organic counter-ions, wherein the organic counter-ion is added before or during the polymerization of the polymerization mixture, and wherein at least one organic counter-ion is selected from the group consisting of +NH3(CH3), +NH2(CH3)2, +NH(CH3)3, +NH3(CH2CH3), +NH2(CH2CH3)2, +NH(CH2CH3)3, +NH3(CH2CH2OH), +NH2(CH2CH2OH)2, +NH(CH2CH2OH)3, methylbis(polyoxyethylene (15)) octadecyl quaternary ammonium, cations derived from N,N-Diethanolamine, N,N,N-triethanolamine, N-ethanolamine, N,N-di-isopropylamine, N,N-diethylamine, N,N-dipropylamine, N,N-dimethylaminopropylamine (DMAPA), N-propylamine, N-isopropylamine, N-isobutylamine, N,N-di-isobutylamine, N,N-dibutylamine and N-butylamine. |
