Polycarboxylic Antiscalants & Dispersants

High-Performance Hydrolyzed Polymaleic Anhydride (HPMA) for Extreme Conditions

HPMA Scale Inhibitor is a versatile, low-toxicity water treatment polymer designed to outperform traditional acrylates in high-stress environments. With an average molecular weight of 400–800, it provides a powerful “threshold effect,” effectively preventing scale formation even under extreme thermal loads and alkaline conditions.

Top Features & Technical Advantages

• Extreme Heat Tolerance: Maintains structural integrity at temperatures where other polymers fail (up to 300°C for 100+ hours).
• Alkaline Performance: Optimized for systems with high pH levels (up to 8.3), reducing the need for constant acid pH adjustment.
• Scale Stripping Power: Not only does it inhibit new scale, but it also helps strip existing carbonate and phosphate deposits.
• Synergistic Formulation: When blended with zinc salts or organic phosphonates (at 1-15ppm), it dramatically improves corrosion inhibition for carbon steel.
• Eco-Friendly Choice: Low toxicity and high chemical stability ensure safe handling and long-term storage.

Technical Specifications

Industrial Applications & Usage

HPMA is a multi-sector solution, widely utilized in:

• Desalination Plants: Ideal for flash vaporization equipment due to its high-temperature threshold.
• Oilfield Operations: Used in crude oil dewatering, petroleum pipelines, and oilfield fill water.
• Steam Locomotives & Boilers: Prevents scale buildup in low-pressure boilers and steam systems.
• Concrete Industry: Functions as a high-efficiency additive for cement to improve dispersion.
• Reverse Osmosis (RO): Acts as a robust dispersant and antiscalant in membrane systems.

Why HPMA is a Superior Alternative to Acrylates

For many engineers, HPMA is a direct upgrade over standard polyacrylic acid (PAA) or other acrylate-based polymers due to its unique molecular structure. It provides:

• Better Calcium Tolerance: HPMA can handle much higher concentrations of calcium ions without precipitating, which is a common failure point for simple acrylates.
• Higher Thermal Stability: While most acrylates begin to degrade around 200°C, HPMA remains stable up to 330°C – 350°C, making it indispensable for high-pressure boilers.
• Longer Effective Time: Provides active scale protection for up to 100 hours, significantly longer than the short-term inhibition offered by many acrylate dispersants.
• Synergy with Phosphonates: HPMA works more efficiently when blended with products like HEDP or PBTC, allowing formulators to reduce total chemical dosages while maintaining performance.

Frequently Asked Questions

What is the dosage of HPMA in cooling systems?

Typically, HPMA is used at a dosage of 1-15ppm. For maximum performance, it is often blended with organic phosphonates to provide a comprehensive scale and corrosion control program.

Can HPMA be used in high pH water?

Yes, HPMA is specifically designed for alkaline water systems (pH 8.3) where it maintains its “threshold effect” to prevent mineral precipitation.

Is HPMA toxic?

No, HPMA is categorized as having low toxicity and is soluble in water, making it safer for industrial handling compared to more volatile alternatives.

Packing & Storage

• Available Packaging: 25L Drum, 200L Drum, 1000L IBC Tank, and ISO Tank.
• Storage: Store in a cool, ventilated area. Avoid exposure to direct sunlight.

Handling & Safety Precautions

Personal Protection

• Eyes: Wear chemical safety goggles or a face shield to prevent accidental splashes.
• Skin: Wear acid-resistant gloves (nitrile or rubber) and protective laboratory clothing.
• Inhalation: Ensure adequate ventilation in the work area. In case of vapor or mist formation, use an appropriate respirator.

First Aid Measures

• Eye Contact: Immediately flush with plenty of clean water for at least 15 minutes. Seek medical attention if irritation persists.
• Skin Contact: Remove contaminated clothing and wash the affected area thoroughly with soap and water.
• Ingestion: Do not induce vomiting. Rinse mouth with water and drink plenty of milk or water. Consult a physician immediately.

Usage & Compatibility

• Acidity: As HPMA is acidic (pH 2.0-3.0), avoid direct contact with strong alkaline substances before dilution to prevent localized heat generation.
• Equipment: Use corrosion-resistant pumps and piping (PVC, PE, or stainless steel) for dosing and storage.

For detailed safety information, please request the Material Safety Data Sheet (MSDS) from our team.