Hydrolyzed Polymaleic Anhydride (HPMA)
CAS No.:
26099-09-2
Structure Formula:
Properties:
Hydrolyzed polymaleic anhydride is a low molecular weight polymeride with an average molecular weight of 400~800. No toxicity, soluble in water, high chemical and thermal stability, decomposed temperature above 330℃.
Hydrolyzed polymaleic anhydride has an obvious threshold effect under high temperatures (350℃) and high pH (8.3)level, suitable for use in an alkaline water system or built with agents. In addition, it has good scale inhibition against carbonate and phosphate scales under a temperature of 300℃ with an effective time of as long as 100 hours.
Due to its good scale inhibition and high-temperature tolerance properties, Hydrolyzed polymaleic anhydride is widely used in the desalination plant of flash vaporization equipment, low-pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.
Hydrolyzed polymaleic anhydride has a good corrosion inhibition effect when used with zinc salt. Hydrolyzed polymaleic anhydride can also be used as an additive for cement.
Specifications:
| Items | Index |
|---|---|
| Appearance | Clear to umber transparent liquid |
| Solid content, % | 48.0 Min. |
| Bromine value, mg/g | 80.0 Max. |
| Average molecular weight | 450 Min. |
| pH(1％ solution) | 2.0-3.0 |
| Density (20℃), g/cm3 | 1.18 Max. |
Usage:
Hydrolyzed polymaleic anhydride is usually used with organic phosphonate at a 1~15 ppm dosage for circulating cool water systems, oilfield fill water, crude oil dewatering, and low-pressure boilers. Hydrolyzed polymaleic anhydride has good scale inhibition (98%) and scale stripping properties. Combined with zinc salts, it can effectively inhibit carbon steel corrosion.
Packing and Storage:
Generally, in a 250 kg net plastic drum, the IBC drum can also be used as required.
Storage for one year in a room shady and dry place.
Safety Protection:
Acidity, Avoid contact with the eyes and skin. Once contacted, flush with water.