Hydroxypropyl methacrylate (HPMA)
HPMA It is a clear, colourless liquid with a characteristic odour. It is an ester of methacrylic acid. It is relatively non-volatile, non-toxic and non-yellowing. HPMA copolymerizes readily with a wide variety of monomers, and the added hydroxyl groups improve adhesion to surfaces, incorporate cross-linking sites, and impart corrosion, fogging, and abrasion resistance, as well as contribute to low odour, colour, and volatility. HPMA is used in the manufacture of acrylic polymers for adhesives, printing inks, coatings and metal applications. HPMA is also used as reactive diluent and alternative to styrene in unsatured polyester (UPR). HPMA compared to HEMA is more suitable when a better water resistance is required, together with a better shrinkage resistance.
Usage:
HPMA is usually used together with organic phosphonate at dosage of 1-15ppm for circulating cool water system, oilfield fill water, crude oil dewatering and low-pressure boilers. HPMA has good scale inhibition (98%) and scale stripping properties. When used together with zinc salts, it can effectively inhibit carbon steel corrosion.
