AA/HPA, Acrylic Acid-hydroxypropyl Acrylate Copolymer


Dispersant IR-225 is a copolymer of polyacrylic acid and hydroxypropyl acrylate. AA/HPA copolymer has good scale inhibition and dispersion properties to calcium phosphate and calcium carbonate. AA/HPA has good dispersion properties to ferric oxide sludge, clay, and grease.

AA/HPA copolymer (IR-225) can be used under a high pH situation. It has good compatibility with other organophosphines and BTA. Dispersant IR-225 can effectively withhold sediments of zinc salt and calcium phosphate. AA/HPA copolymer has good scale inhibition and dispersion properties under high temperature and alkaline situations.

CAS No.:


Structure Formula:

Acrylic Acid-hydroxypropyl Acrylate Copolymer


AppearanceColorless to yellow liquid
Solid content, %30.0±2.030.0±2.0
Free monomer (as AA), %0.5 Max.0.5 Max.
pH (1% water solution)7.5±1.02.5±0.5
Limiting viscosity number (30℃), dl/g0.065~0.0950.065~0.095
Density (20℃), g/cm31.10 Min.1.10 Min.


AA/HPA copolymer (IR-225) can be used in circulating cool water system in the situation of alkaline and excess of phosphate. AA/HPA can be used as a scale inhibitor and dispersant for a heater, none-column evaporator boiler, circulating cool water and oilfield dirty refilling water with the high calcium content.

The dosage of 10~30 mg/L is preferred. Dispersant IR-225 can be built with organophosphines to form a full organic alkaline formula.

Packing and storage:

Normally in 200 kg net plastic drum, the IBC drum can also be used as required.

200L plastic drum 1000L IBC

Storage for one year in room shady and dry place.