HPMA,Hydrolyzed Polymaleic Anhydride - Polycarboxylic antiscale and dispersant Research Network

Hydrolyzed Polymaleic Anhydride (HPMA) introduction

Polycarboxylic antiscale and dispersant

Dispersant is a molecule at the same time in the lipophilic and hydrophilic nature of the two opposing surfactant. Those can be difficult to homogeneous dispersion of inorganic dissolved in the liquid, The solid particles of paint, but also to prevent the solid particles and the settlement pool, a stable suspension of pharmaceutical requirements.

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 obvious threshold 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.

items	index
Appearance	Pale yellow to umber transparent liquid
Solid content %	48.0 min
Bromine value mg/g	80.0 max
Average molecular weight	450 min
pH （1％water solution）	2.0-3.0
Density (20℃)g/cm³	1.18 min