Hydrolyzed Polymaleic Anhydride (HPMA) is a high-performance, low molecular weight polymeride (average molecular weight 400-800) engineered for superior scale inhibition and thermal stability. Characterized by its non-toxic nature and complete water solubility, HPMA maintains exceptional chemical integrity with a decomposition temperature exceeding 330°C, making it an essential additive for extreme industrial environments.
Specially designed for alkaline water systems, HPMA exhibits a significant threshold effect under high temperature (up to 350°C) and high pH (8.3) levels. It provides unmatched protection against carbonate and phosphate scales for up to 100 hours at 300°C, ensuring operational efficiency in desalination plants, boilers, and oilfield water systems while offering synergistic corrosion inhibition when combined with zinc salts.
Detailed Parameters
| Appearance | Pale yellow to umber transparent liquid | Solid Content | 48.0% min |
|---|---|---|---|
| Bromine Value | 50.0 mg/g max | pH (1% solution) | 2.0 - 3.0 |
| Density (20℃) | 1.18 g/cm³ min | Molecular Weight | 400 - 800 |
| Decomposition Temp | Above 330°C | Max Operating Temp | Up to 350°C |
| CAS No. | 26099-09-2 | Solubility | Water Soluble |
Key Advantages
Extreme Thermal Stability
Stable up to 330°C decomposition and 350°C operation, ideal for high-heat industrial processes.
Extended Inhibition Time
Provides effective carbonate and phosphate scale inhibition for as long as 100 hours at 300°C.
High Alkaline Tolerance
Optimized for alkaline water systems with an effective threshold at pH levels of 8.3.
Scale Stripping Power
Achieves up to 98% scale inhibition efficiency and excellent scale stripping properties.
Synergistic Protection
Combines with zinc salts to effectively inhibit carbon steel corrosion in piping systems.
Versatile Application
Applicable in desalination, steam locomotives, oil pipelines, and as a cement additive.
Product Gallery
Management Platforms
Packaging Options
Available in 200L plastic drums, 1000L IBC tanks, or customized packaging.
Storage Standards
Stored in shady, dry rooms to maintain a shelf life of one year.
Safety Protocol
Acidic properties require avoiding contact with skin and eyes; rinse with water immediately.
Dosage Control
Typically applied at 1-15ppm in combination with organic phosphonates.
Quality Compliance
Strict adherence to chemical purity indices for industrial grade application.
Logistics Support
Global shipping compliant with hazardous chemical transport regulations.
Investment Return Comparison
| Feature | Standard Scale Inhibitors | HPMA Polymer |
|---|---|---|
| Temperature Limit | Low to Moderate | Ultra-High (350°C) |
| Alkaline Stability | Variable | Superior (pH 8.3+) |
| Inhibition Rate | Moderate | Up to 98% |
| Maintenance Cycle | Frequent Descaling | Extended (100hr+ protection) |
| Corrosion Control | Limited | High (with Zinc salts) |
Frequently Asked Questions
HPMA is widely used in desalination flash vaporization equipment, low-pressure boilers, steam locomotives, crude oil evaporation, petroleum pipelines, and industrial circulating cooling water systems, as well as a cement additive.
Unlike many standard inhibitors, HPMA offers significantly higher thermal stability (up to 350°C) and performs better in highly alkaline environments, providing a more durable threshold effect.
While HPMA is primarily a scale inhibitor, it exhibits excellent corrosion inhibition effects on carbon steel when used in combination with zinc salts.
For most circulating cool water systems, oilfield fill water, and low-pressure boilers, HPMA is typically used together with organic phosphonates at a dosage of 1-15ppm.
HPMA should be stored in a shady, dry room. When kept under these conditions, it typically maintains its properties for one year.
HPMA is non-toxic, but it is acidic. Therefore, direct contact with skin and eyes should be avoided. In case of contact, wash the affected area with plenty of water immediately.
