In the transition toward eco-friendly and low-VOC industrial and architectural coatings, waterborne formulations often face critical rheology challenges: balancing sag control during application with anti-settling stability during storage, all without sacrificing leveling, gloss, or clarity.
Sinocure Chemical Group introduces AgeSin® RH-A4425, a modified polyurea polyurethane liquid rheological additive engineered specifically for high-demand waterborne coating systems. Formulated as a direct, cost-effective alternative to RHEOBYK-425 TF, AgeSin® RH-A4425 delivers pseudoplastic flow behavior, excellent thermal storage stability, and effortless incorporation.
AgeSin® RH-A4425 utilizes active urea groups that interact with waterborne resin emulsions and pigment/filler particles, establishing a 3D reversible intermolecular hydrogen-bonding network:
At Rest / Storage (Low Shear Rate): Builds high in-can viscosity, providing long-term anti-settling performance and preventing pigment hard-caking even under elevated thermal storage conditions.
During Application (High Shear Rate): The hydrogen bonds temporarily dissociate under shear (spraying, rolling, brushing), leading to an immediate drop in viscosity for smooth atomization, excellent flow, and effortless application.
After Application (Structure Recovery): Rapidly rebuilds its thixotropic network to prevent sagging on vertical surfaces while allowing sufficient open time for optimal leveling.
| Feature | Performance Benefit |
|---|---|
| Superior Anti-Sagging & Anti-Settling | Strong pseudoplastic profile ensures sag resistance on vertical substrates and prevents settling during long-term and high-temperature storage. |
| Zero Seeding & Crystallization | Liquid delivery eliminates the risk of seeding, grittiness, or crystallization commonly observed with fumed silica or powdered additives. |
| Uncompromised Gloss & Clarity | Maintains high film gloss and transparency in clear coats and matte wood finishes without causing haziness. |
| Broad pH Stability | Rheological efficiency is independent of system pH (unlike acrylic thickeners/ASE/HASE), ensuring consistent stability. |
| Easy Incorporation (Post-Addable) | Requires only moderate shear; can be added during the grinding stage or post-adjusted in finished batches without temperature control. |
| Eco-Friendly Compliance | APEO-free and Low VOC based on polypropylene glycol carrier, compliant with global environmental regulations. |
Formulators seeking supply chain resilience, competitive cost structures, and stable performance can replace RHEOBYK-425 TF with AgeSin® RH-A4425 on a 1:1 active basis in most standard waterborne formulations.
Drop-in compatibility across polyurethane dispersions (PUD), acrylic emulsions, waterborne alkyds, and hybrid systems.
Consistent batch-to-batch rheological control with reliable supply from Sinocure Chemical Group.
AgeSin® RH-A4425 is engineered for a wide array of high-grade waterborne formulations:
Waterborne Wood & Furniture Coatings:
Clear varnishes and transparent sealers (retains clarity without cloudiness)
Pigmented primers and matte topcoats
Outdoor wood stains and weather-resistant coatings
Waterborne Industrial & Protective Coatings:
Industrial machinery and equipment enamels
Automotive parts and component finishes
Anti-corrosive waterborne primers
Architectural & Decorative Coatings:
Interior and exterior latex paints
High-build textured coatings and putty formulations
| Property | Value |
|---|---|
| Chemical Composition | Modified polyurea polyurethane solution |
| Appearance | Yellow to brownish liquid |
| Active Content (Non-Volatile) | ≥ 50% |
| Density (23°C) | 0.80 – 1.20 g/cm³ |
| Viscosity (25°C) | 200 – 3,000 mPa·s (cps) |
| Carrier Solvent | Polypropylene glycol (PPG) |
| Packaging | 25 kg / 180 kg Drum |
For Anti-Settling: 0.2% – 5.0% (based on total formulation weight).
For Anti-Sagging: 0.5% – 1.0% (based on total formulation weight).
Method of Addition: Incorporate under moderate shear. While it can be introduced at the pigment grinding phase, post-addition under agitation is also effective. Full rheological structure typically matures within 2 to 4 hours post-mixing.
Note: Due to high rheological efficiency, pre-dilution with water or coalescent solvents can be tested if low-viscosity dosing is preferred.
A: AgeSin® RH-A4425 is chemically formulated with a comparable modified polyurea polyurethane backbone and active content (≥50%), offering identical pseudoplastic rheology, shear-thinning response, and sag resistance. Formulators can replace RHEOBYK-425 TF on a 1:1 active basis with minimal formulation adjustments.
A: Yes. Unlike powdered rheology modifiers or fumed silica that require high-shear activation, AgeSin® RH-A4425 is a ready-to-use liquid solution. It disperses readily under moderate shear and can be incorporated at the grinding stage or post-added to adjust final batch viscosity.
A: No. Thanks to its complete liquid solubility and optimized compatibility with waterborne polymer emulsions (PUD, acrylics), AgeSin® RH-A4425 builds rheological network through molecular hydrogen bonding rather than particulate scattering. It maintains superior film clarity and high gloss without hazing or seeding.
A: No. Unlike ASE/HASE alkali-swellable acrylic thickeners whose viscosity drops significantly when pH fluctuates, the polyurea hydrogen-bonding network of AgeSin® RH-A4425 remains robust and effective across a broad pH range.
A: AgeSin® RH-A4425 is formulated in a polypropylene glycol carrier to prevent crystallization and seeding. At lower temperatures, its viscosity may increase slightly or show slight turbidity, which does not affect rheological performance. Pre-dilution before incorporation is recommended for low-temperature handling.
A: Keep in a dry, well-ventilated warehouse away from direct sunlight and heat sources in its original sealed containers. Shelf life is 12 months. Products beyond 12 months can still be used after routine inspection.
Accelerate your waterborne coating performance with AgeSin® RH-A4425. Contact our technical specialists for formulation guidance, complete Technical Data Sheets (TDS), and complimentary lab samples:
Email: info@sinocurechem.com
Phone / WhatsApp: +86 15668330235
Website: www.sinocurechem.com
Address: No. 61, South Industrial Road, Jinan Area of Shandong Pilot Free Trade Zone, China
