Sodium 2-acrylamido-2-methyl propane

Homopolymers and copolymers from amido-sulfonic acid or salt containing monomers can be prepared by reactive extrusion, preferably in a twin screw extruder [1660]. The process produces a solid polymer. Copolymers of acrylamide, N-vinyl-2-pyrrolidone, and sodium-2-acrylamido-2-methyl-propane sulfonate have been proposed to be active as fluid loss agents. Another component of the formulations is the sodium salt of naphthalene formaldehyde sulfonate [207]. The fluid loss additive is mixed with hydraulic cements in suitable amounts. 

Associative copolymers of acrylamide with N-alkylacrylamides, terpoly-mers of acrylamide, N-decylacrylamide, and sodium-2-acrylamido-2-methyl-propane sulfonate (NaAMPS), sodium acrylate (NaA), or sodium-3-acrylamido-3-methylbutanoate (NaAMB) have been shown to possess the required rheologic behavior to be suitable for enhanced oil-recovery processes [1184]. 

Sodium methallyl sulfonate (SMS) Sodium 2-acrylamido-2-methyl propane sulfonate (SAMPS)... 

The use of additives in aqueous emulsions for mist suppression has been only recently been explored (1,2,3). In particular, high molecular wei t polyethylene oxide EO) polymers have received considerable testing and have shown to have some degree of success in reducing mist. However, these polymers have a finite lifetime in the fluid before they shear degrade. Thus, this has led to the development of novel shear stable polymers derived from a highly hydrophilic sodium-2-acrylamido-2-methyl propane sulfonic acid (NaAMPS) monomer polymerized with hydrophobic monomers. (4)... 

Sodium-2-acrylamido-2-methyl propane sulfonic acid (NaAMPS) monomer was polymerized with a variety of hychophobic alkylacrylate and alkylacrylamide monomers. The reactions were performed as solution polymerizations in methanol using the redox radical initiator of sodium persulfate and sodium metabisulfite. 

Type A copolymers and terpolymers have been prepared by copolymerizing vinyl pyridinium halides with alkali metal salts of sulfonate comonomers including vinylsulfonate, 2-acrylamido-2-methyl propane sulfonate, and p-styrene sulfonate (15-19). Methacrylamidopropyl-trimethyl ammonium chloride and p-styrene sulfonate have been terpolymerized with the hydrophilic monomer acrylamide (20,21). Type A copolymers and terpolymers have also been prepared from microemulsions of sodium 2-acrylamido-2-methyl-l-propanesulfonate and [2-(methacryloyloxy)ethyl]trimethylammonium chloride (22-25). 

Sodium poly(acrylamido-2-methyl-2-propane sulfonic acid)... 

Other sulfonated polymeric electrolytes were also used in combination with polyaniline [136]. Sodium poly(styrene sulfonate), poly(2-acrylamido-2-methyl-l-propane sulfonate) and poly(vinyl sulfonate) were used as electrolytes in the electrochemical polymerization of aniline. Perchloric acid was added to lower the pH. The polymerization of aniline was performed by potential sweep using a platinum foil as working electrode. According to the authors, the polyelectrolyte is incorporated into the polyaniline film in a ratio of one sulfonate group for every four aniline repeating units. 

Other examples of set retarders are ethylenediamine tetraac-etic acid and nitrilotriacetic acid, or a combination of these compounds (11). StiU another example of a set retarder for Portland cement is a copolymer formed from a monomer of 2-acrylamido-2-methyl-l-propane sulfonic acid. Examples of set retarders for calcium aluminate cements are polymeric phosphate salts such as sodium tripol q3hosphate (12). 

Bastakoti BP, Guragain S, Yoneda A, Yokoyama Y, Yusab S, Nakashima K (2010) Micelle formation of poly(ethylene oxide-b-sodium 2-(acrylamido)-2-methyl-l-propane sulfonate-b-styrene) and its interaction with dodecyl trimethyl ammonium chloride and dibucaine. Polym Chem 1 347-353... 

---