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. In addition, AA/HPA has good dispersion properties in 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 systems in alkaline and excess phosphate. In addition, 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 a 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:

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

200L plastic drum 1000L IBC

Storage for one year in a room shady and dry place.