Partially Hydrolyzed Polyacrylamide (PHPA) is a synthetic, water-soluble co-polymer synthesized via the partial alkaline hydrolysis of polyacrylamide (PAM) or through the direct copolymerization of acrylamide with acrylate monomers. Designed specifically to provide superior rheological control, clay encapsulation, shale inhibition, and high-efficiency flocculation, PHPA stands as a cornerstone chemical additive across the petroleum extraction, civil foundation engineering, and mineral beneficiation sectors globally.
The key functional characteristic of PHPA lies in its partially hydrolyzed backbone. During synthesis, a precise percentage of the amide groups (-CONH₂) are converted into anionic carboxylate groups (-COO⁻Na⁺). This yields a copolymer containing both nonionic acrylamide units and anionic acrylate units.
Established in 2011 within the Qingdao Free Trade Zone, China, Qingdao Oubo Chemical Co., Ltd. has grown into an international leader in polyacrylamide production. With an annual polymer synthesis capacity breaking through 50,000 Metric Tons in 2018, Oubo Chemical operates under strict ISO 9001:2008 / ISO 9001:2015 quality control frameworks.
Oubo utilizes advanced biological enzymatic monomer synthesis pathways—a patented process that yields exceptionally high-purity acrylamide with low residual monomer content (<0.05%), substantially reducing environmental toxicity profiles while maintaining ultra-consistent polymer chain lengths.
Procuring wholesale PHPA requires absolute alignment with international safety standards, OSHA Hazard Communication Standards, and GHS classification. Below is the standardized technical specification and hazard identification data derived from Oubo Chemical's certified MSDS documents.
| Property Parameter | Standard Specification (Technical Grade) | High-Purity Oilfield Grade | Test Method / Standard |
|---|---|---|---|
| Chemical Identity | Partially Hydrolyzed Polyacrylamide (PHPA) | Anionic Polyacrylamide Sodium Salt | CAS No. 9003-05-8 / 25085-02-3 |
| Physical Appearance | White to Off-White Granular Powder | Free-Flowing Fine White Granules | Visual Inspection |
| Degree of Hydrolysis | 25.0% - 35.0% | 30.0% - 40.0% | Potentiometric Titration |
| Molecular Weight (MW) | 14 - 18 Million Daltons | 18 - 25 Million Daltons | Viscometry (Intrinsic Viscosity) |
| Solid Content (%) | ≥ 88.0% | ≥ 90.0% | 105°C Drying Oven (ISO 3727) |
| Residual Acrylamide Monomer | ≤ 0.05% (500 ppm) | ≤ 0.025% (250 ppm) | HPLC Analysis |
| Dissolving Time | ≤ 60 Minutes | ≤ 45 Minutes | Standard Mechanical Agitation (400 RPM) |
| pH Value (0.1% Sol.) | 7.0 - 9.0 | 7.5 - 8.5 | Digital pH Meter at 25°C |
GHS Classification: Non-hazardous polymer matrix under standard handling. However, like most organic dust powders, particulate accumulation presents minor inhalation and slip hazards.
Store in original sealed packaging in a cool, dry, well-ventilated warehouse away from direct sunlight, moisture, and incompatible oxidative materials.
PHPA exhibits low aquatic toxicity to freshwater fish and microorganisms due to its high molecular size preventing cellular membrane absorption.
Due to its multifunctional capability as a protective colloid, shale encapsulant, thickener, and flocculant, Oubo Chemical's PHPA series delivers macro-level performance across diverse industrial verticals.
In water-based drilling muds, PHPA serves as a primary shale stabilizer and mud viscosifier according to API 13A standards.
Extensively deployed in coal washing, iron ore separation, alumina processing, and precious metal extraction.
Crucial additive in bored piling, diaphragm walling, horizontal directional drilling (HDD), and micro-tunneling operations.
Serves as a high-performance anionic flocculant for primary clarification and secondary sludge dewatering applications.
Utilized as a paper retention agent, wet-end dry strength enhancer, and process white water clarifier.
Applied to combat agricultural soil erosion, reduce irrigation runoff siltation, and enhance water infiltration.
The demand for Partially Hydrolyzed Polyacrylamide is expanding rapidly, driven by stringent global environmental regulations on industrial wastewater discharge and elevated oil exploration in complex high-temperature, high-salinity (HTHS) fields.
Oubo Chemical invests heavily in continuous technical innovation. Our research & development roadmap highlights three primary technological breakthroughs:
Qingdao Oubo Chemical Co., Ltd. operates state-of-the-art automated polymer synthesis lines. Raw materials are sourced globally via strategic partnerships with industry giants such as SINOPEC and Eni, ensuring raw monomer purity and reliable supply chain execution.
25kg Kraft Paper / PE Inner Liner for Custom OEM Branding
High-strength 25kg multi-wall paper bag with O'brien branding
Heavy-duty woven FIBC bags for bulk industrial consumers
Shrink-wrapped pallets with plastic corner guards for sea transport
Technical inquiries compiled by Oubo Chemical's senior application engineers regarding PHPA purchasing, MSDS interpretation, and field application.
Oubo Chemical
