Overview: polyacrylic acid, PAA, alias 2- acrylic acid homopolymer, acrylic resin coating, acrylic resin, acrylic monomer polymer, acrylic modified resin, acrylic resin emulsion, is a water-soluble acrylic polymer, also soluble in some polar solvents, such as methanol, two alkane and ethylene glycol. Ionization constant 4.75. Because the molecule contains a large number of carboxyl groups, it can react with alkali, alcohol and amine, and can also carry out dehydration, degradation and complexation reactions. It can be used as thickener, dispersant, flocculant, adhesive and film-forming agent. It is widely used in industries such as coatings, plastics, papermaking, textiles, rubber, food, cosmetics and water treatment.
Action mechanism: polyacrylic acid is a commonly used scale inhibitor for industrial circulating cooling water. Polyacrylic acid is adsorbed on the microcrystalline particles of slightly soluble inorganic salts through coordination and chelation, or several microcrystalline particles are connected into loose particle groups with a considerable distance from each other to prevent the particles from contacting each other and growing up, so as to disperse them in the water for a long time. The scale inhibition performance of polyacrylic acid is closely related to its molecular weight. Polyacrylic acid with molecular weight of 2000 ~ 6000 or 3000 ~ 5000 has good scale inhibition effect on calcium carbonate and calcium phosphate scale.
Application:
1. Used as scale inhibitor and dispersant in industrial water treatment. Good compatibility. It can also be used for drinking water pretreatment. It is used to separate red mud in the preparation of alumina. In chlor alkali plant, the refined brine is mostly used in the manufacture of cosmetics. As ointment, it can promote the absorption of griseofulvin and control the release of drugs. It is used to prepare finishing agents for leather and some high-grade commodities, prepare acrylic resin paints, etc. it is used to fix chromium salt, help tanning, reduce chromium pollution, etc. it is used to improve the processing performance of PVC, as corrosion and scale inhibitor, water stabilizer, quenchant, thickener, etc. it is used as leather finishing filler Textile slurry and water quality stabilizer are used in the manufacture of acrylic resin paint, which can be used as film-forming agent and adhesive in leather finishing agent, as well as polyacrylic resin emulsion paint. They are widely used in the decoration of light leather such as surface leather, garment leather and glove leather, which can enhance the bending resistance, elongation, light resistance, aging resistance, cold resistance and heat resistance of leather, It is the main film-forming agent for modifying grain leather with pigment paste.
2. It can be used as excellent suspending agent, emulsifier, transparent matrix of high-grade cosmetics and pharmaceutical excipient matrix. It is also the most effective water-soluble thickener. It can also be used in toothpaste as thickener and adhesive. It can be used in combination with other polymers
3. It is a common dispersant, which can disperse microcrystalline or sediment of calcium carbonate, calcium sulfate and other salts in water without precipitation, so as to achieve the Usages of scale inhibition. In addition to being used as scale inhibitor and dispersant in circulating cooling water system, it is also widely used in papermaking, textile, printing and dyeing, ceramics, coatings and other industries.
4. It is applied to water treatment of chemical industry, chemical fertilizer, printing and dyeing, power generation, etc.
5. It is used to prevent scaling in circulating cooling water systems such as power plants, iron and steel plants, chemical plants, chemical fertilizer plants, oil refineries and air conditioning systems.