Hydrolyzed Polymaleic Anhydride

(HPMA)

【CAS】26099-09-02

Synonyms: Belclene 200, PMA, Dequest P9000, Homopolymer of Maleic Acid Polymaleic Acid

Structure:

Properties:

HPMA is a low molecular weight polymeride, with average molecular weight 400-800. No toxicity, soluble in

water, high chemical and thermal stability, decomposed temperature above 330℃.

HPMA has obviousthreshold effect under high temperature (350℃) and high pH(8.3)level, suitable to be used in

alkaline water system or built with agents. It has good scale inhibition against carbonate and phosphate scales

under temperature 300℃ with effective time as long as 100 hours. Due to its good scale inhibition and high

temperature tolerance properties.

HPMA is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam

locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems. In addition,

HPMA has good corrosion inhibition effect when used together with zinc salt. HPMA can also used as additives

for cement.

Specification:

items                                                                                            index

Appearance                                                      Clear to umber transparent liquid

Solid content %                                                                              48

Bromine value mg/g                                                                     80

Average molecular weight                                                          450

pH(1% solution)                                                                        2.0-3.0

Density (20℃)g/cm3                                                                 1.18

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.

Safety Protection:

Acidity, Avoid contact with eye and skin, once contacted, flush with water.

Package and Storage:

Normally In 25kg net Plastic Drum, or packing as customers’ required.

Storage for ten month in room shady and dry place.