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What is Sodium Polyacrylate CAS 9003-04-7

Views: 3     Author: Site Editor     Publish Time: 04-03-2022      Origin: Site



Density: 1.32 g/mL at 25℃

Refractive index: n20/D 1.43

Storage conditions: 2-8℃


CAS 9003-04-7


Sodium polyacrylate, with chemical formula of (c3h3nao2) n, is a new type of functional polymer material and important chemical product. The solid product is white or light yellow block or powder, and the liquid product is colorless or light yellow viscous liquid. It is obtained from acrylic acid and its esters by polymerization in aqueous solution. Tasteless, soluble in sodium hydroxide aqueous solution, precipitated in calcium hydroxide, magnesium hydroxide and other aqueous solutions. It is often used as water treatment agent, brine refining and latex thickening. It can also be used as food tackifying and emulsifying.


1. It is used as corrosion and scale inhibitor, water quality stabilizer, coating thickener and water retaining agent, flocculant, drilling mud treatment agent, etc.

2. It is used for circulating cold water treatment of copper equipment, and its scale inhibition effect is good. When the dosage is 100 mg / L, it can form chelates with scaling ions in medium hardness water, flow with water, and prevent the formation of iron oxide scale.

3. It is used as filtrate reducer in low solid drilling industry.

4. Good dispersant. It can be used in combination with other water treatment agents for oil field water injection, cooling water and boiler water treatment.

5. Used as thickener to enhance the protein adhesion in raw flour.


Deionized water and 34kg chain transfer agent isopropanol were successively added into the reactor and heated to 80 ~ 82 ℃. Add 14kg ammonium persulfate and 170kg monomer acrylic acid aqueous solution (deionized water) dropwise. After dropping, the reaction lasted for 3h. Cool to 40 ℃, add 30% NaOH aqueous solution, neutralize to pH value of 8.0 ~ 9.0, and evaporate isopropanol and water to obtain liquid product. The acrylic acid or acrylate can react with sodium hydroxide to form sodium acrylate monomer, and remove the auxiliary alcohols. After concentrated and adjusting the pH value, acrylic acid and sodium hydroxide react with sodium hydroxide to form sodium acrylate monomer, and then catalyzed by ammonium persulfate. Polymerize into sodium polyacrylate, add sodium polyacrylate with relative molecular weight of 1000 ~ 3000 into the reactor and prepare 30% aqueous solution.


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