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Hypophosphorous acid based polyacrylic acid
[Structural formula]
The hypophosphorous acid-based polyacrylic acid molecule contains phosphoric acid subunits and carboxyl groups, and has the scale and corrosion inhibition characteristics of organic phosphonic acid and polycarboxylic acid
[Physical and chemical properties] White glassy solid
[Preparation method] Acrylic acid and hypophosphorous acid (salt) are in a molar ratio of (7~13):1, water is used as solvent, peroxide is used as initiator, and heated in the temperature range of 85~100℃ for 2~4h, Concentrate under reduced pressure or adjust to the required content by adding water to obtain an aqueous solution of hypophosphorous acid-based polyacrylic acid
If you want to prepare a high-purity solid product, you can evaporate the water to dryness under reduced pressure (such as 100°C/13.
In a 250mL three-necked flask equipped with a condenser, an electric stirrer and a thermometer, add 80g of deionized water and a certain mass fraction of sodium hypophosphite; start the stirrer, slowly increase the temperature to 80℃, and start adding 36g acrylic acid and a certain mass at the same time.
[Technical Index]
[Application] This product is suitable for use under severe conditions such as high hardness, high alkalinity, and high concentration multiples.
This product can also be used in formulas with other water treatment chemicals, with obvious synergistic effects
Related link: Poly-2-acryl-2-methylpropanesulfonate (PAMPS)