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2024
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Characteristics of AMPS sodium salt
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Sodium 2-acrylamido-2-methylpropane sulfonate is a 50% sodium salt solution, which is mainly used in lotion, water-based adhesives and sealants. Add sodium 2-acrylamido-2-methylpropane sulfonate to lotion to react with acrylic acid, styrene, or vinyl acetate, and introduce reactive emulsifier to prevent the migration of emulsifier. Only 2-3% sodium 2-acrylamido-2-methylpropane sulfonate can make the lotion have low viscosity and remarkable stability. At the same time, there is no need to add additives such as ethylene glycol, and it can improve the adhesion, thermal stability, and anti-static properties of the paint film, as well as improve the water resistance and scrub resistance of latex paint. The acrylamide group in AMPS sodium salt can accelerate the polymerization reaction; The combination of two side methyl groups and sodium methylsulfonate behind the amino group can prevent its hydrolysis and thermal degradation; Sulfonated groups can enable monomers to exhibit high hydrophilicity and ionic characteristics at any pH. After a detailed study on the gel, particles, surface charge density, latex stability and other aspects produced when AMPS sodium salt is used to synthesize lotion, people have come to the conclusion that because the polymer has the characteristics of polymer electrolyte, it adsorbed on the surface of latex particles to form an ionosphere, thus increasing the stability of latex. The use of AMPS sodium salt can not only replace carboxylic acid monomers, but also reduce the use of other surfactants, and has good resistance to hydrolysis and thermal stability; The products made of these lotion have smooth, flexible and comfortable touch, and the scrub resistance of the coatings made of them has also been significantly improved. So AMPS sodium salt is a highly reactive and hydrophilic functional polymer monomer, and also a polymerizable surfactant.
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