AA/HPA, Acrylic Acid-2-Hydroxypropyl Acrylate Copolymer


AA/HPA is a copolymer of polyacrylic acid and hydroxypropyl acrylate. It has good scale inhibition and dispersion properties to calcium phosphate and calcium carbonate.

Acrylic Acid-2-Hydroxypropyl Acrylate Copolymer has good dispersion properties to ferric oxide sludge, clay, and grease. AA/HPA can be used in high pH situations. This copolymer has good compatibility with other organophosphines and BTA. It can effectively withhold sediments of zinc salt and calcium phosphate, it has good scale inhibition and dispersion properties under high temperature and alkaline situations.

CAS No.:


Structure Formula:

AA-HPA structure formula


Item Neutro Acid
Appearance Colorless to yellow liquid Colorless to yellow liquid
Solid content, % 30.0±2.0 30.0±2.0
Free monomer (as AA), % 0.5 Max. 0.5 Max.
Density (20℃), g/cm3 1.10 Min. 1.10 Min.
pH (1%  solution) 7.5±1.0 2.5±0.5
Limiting viscosity number (30℃), dl/g 0.065~0.095 0.065~0.095


AA/HPA copolymer can be used in circulating cool water systems in situations of alkaline and excess phosphate. Acrylic acid-2-hydroxypropyl acrylate copolymer can be used as a scale inhibitor and dispersant. In particular, for heaters, none-column evaporator boilers, circulating cool water, and oilfield dirty refilling water with the high calcium content. A dosage of 10~30mg/L is preferred. It can be built with organophosphines to form full organic alkaline formula.

Packing and Storage:

Normally In a 200kg net Plastic Drum, IBC drums can also be used as required. Storage for one year in room shady and dry place.


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