Polyvion WAD U90 is a non-ionic, associative polyurethane thickener supplied as an aqueous solution for waterborne coating and adhesive systems. Formulated as a hydrophobically modified ethoxylated urethane (HEUR), it builds low-shear viscosity efficiently while imparting strong thixotropic behavior, helping formulators control sag resistance, flow, and leveling without compromising film clarity or gloss. The product is widely used across architectural, industrial, and textile coating formulations where consistent rheology and good storage stability are required.
Polyvion WAD U90 Overview
Polyvion WAD U90 belongs to the family of HEUR-type associative thickeners, in which hydrophobic end groups on a polyurethane backbone associate with latex particles and surfactant micelles in the aqueous phase to build viscosity through a reversible network structure. This associative mechanism differentiates the product from conventional cellulosic or alkali-swellable thickeners, since it produces a more Newtonian-like flow profile at application shear rates while still delivering pronounced low-shear thickening and anti-sag performance at rest.
The product is supplied ready to use as an aqueous solution and is designed for straightforward post-addition into finished waterborne formulations. Because the thickening mechanism is physical rather than ionic, performance is generally less sensitive to formulation pH and electrolyte content than with alkali-swellable emulsion thickeners, which can simplify letdown and quality control across production batches.
Key Features
- High-efficiency low-shear thickening: Polyvion WAD U90 delivers strong viscosity build at low shear rates, allowing formulators to reach target viscosity at lower dosage levels compared with many conventional associative thickeners. This efficiency can help reduce total rheology-additive cost in a formulation.
- Strong thixotropic behavior: The product imparts pronounced shear-thinning rheology, supporting sag resistance on vertical surfaces while maintaining good flow and leveling during brush, roller, or spray application.
- Broad formulation compatibility: Suitable for a wide range of waterborne binder systems, including acrylic, styrene-acrylic, vinyl acetate, and polyurethane dispersions, making it a versatile building block across multiple coating platforms.
- Minimal impact on gloss and water resistance: Because it is used at relatively low dosage and does not rely on strong ionic interactions, it has limited impact on film clarity, gloss development, or water resistance compared with cellulosic alternatives.
- Low odor, organotin-free formulation: The product is formulated without organotin catalysts or APEO-containing surfactants*, supporting lower-odor systems intended for interior and professional applications.
*Based on supplier technical description; compliance status should be confirmed per regulation and application.
Typical Applications
Polyvion WAD U90 is primarily used to build and stabilize the low-shear viscosity of architectural waterborne coatings, where it helps prevent pigment settling and roller spatter while supporting good sag resistance on vertical walls and ceilings. In industrial and protective coating systems, the product supports consistent film build during spray or roller application, contributing to uniform dry film thickness across a range of substrates and reducing the risk of drips or runs on complex geometries.
Beyond architectural paints, Polyvion WAD U90 is also applied in textile coating formulations, where its rheology profile assists with paste consistency and print definition, as well as in waterborne wood coatings and pigmented waterborne systems that require both good flow-out and resistance to sagging on vertical or profiled surfaces. It is also evaluated in adhesive and sealant systems where controlled low-shear body improves application handling.
Technical Specifications
The product is characterized by the following indicative technical parameters; confirmed values will be provided in the final product specification sheet.
- Chemical type: Hydrophobically modified ethoxylated urethane (HEUR) associative thickener
- Supply form: Aqueous solution
- Ionicity: Non-ionic
- Rheology profile: Low-shear thickening with strong thixotropy
- Active content: To be confirmed based on the final specification sheet.
- Viscosity: To be confirmed based on the final specification sheet.
- pH value: To be confirmed based on the final specification sheet.
- Function: Rheology control and viscosity build
Rheological Performance
Associative thickeners such as Polyvion WAD U90 build viscosity through a physical network of hydrophobe-hydrophobe and hydrophobe-latex associations, rather than through the polymer entanglement or electrostatic swelling mechanisms used by cellulosic or alkali-swellable thickeners. This gives formulations a more favorable balance between low-shear body, mid-shear brushability, and high-shear leveling, which is a key reason associative technology is now widely preferred for premium architectural and industrial waterborne coatings.
In practice, formulators commonly combine this type of low-shear associative thickener with a mid- or high-shear rheology modifier to achieve a fully balanced viscosity profile across the full application shear range. Dosage, order of addition, and shear during letdown can all influence the final rheological result, so bench-scale trials are recommended before scale-up to production volumes.
Storage Recommendations
- Store in a dry, well-ventilated area away from direct sunlight and heat sources.
- Recommended storage temperature range: 5-35°C; protect from freezing.
- Keep containers tightly closed when not in use to prevent evaporation and contamination.
- Shelf life: To be confirmed based on the final specification sheet.
Documentation & Compliance
Each shipment of the product is supported by standard quality and compliance documentation to help customers manage incoming inspection, formulation approval, and downstream regulatory reporting.
- Certificate of Analysis (COA): Provided per batch
- Safety Data Sheet (SDS): Available upon request
- Labels: Prepared in accordance with destination regulations
- Industrial use only
Formulation Guidance
As with any associative thickener, the final rheological result delivered by the product depends on the surrounding formulation, including binder chemistry, surfactant package, pigment volume concentration, and the shear history applied during letdown. Formulators are encouraged to run a small dosage ladder, typically starting from a low addition level and increasing incrementally, to identify the point at which target low-shear viscosity and sag resistance are achieved without over-thickening the mid-shear region.
Because the product is non-ionic, it is generally compatible with a broad range of anionic and non-ionic surfactants and dispersants used in waterborne coatings. However, as with all rheology modifiers, compatibility should be confirmed through bench trials whenever a new binder, colorant, or additive package is introduced into an existing formulation.
Packaging & Logistics
- Packaging: Standard industrial packaging
- MOQ: Subject to packaging configuration
- Lead time: Indicative lead time, to be confirmed upon order acceptance
- Incoterms: Quoted case by case
Polyvion WAD U90: Safety & Handling
Polyvion WAD U90 should be handled in accordance with standard industrial hygiene practices for aqueous polyurethane additives. Users are advised to review the Safety Data Sheet prior to handling and to implement appropriate personal protective equipment and engineering controls as specified therein. As with all rheology additives, small-scale compatibility and dosage trials are recommended before full-batch formulation to confirm performance in the target system.
Safety Data Sheet and destination-compliant labeling information for the product are available upon request. For related rheology and resin options, see also Polyvion WAD U30 and Polyvion WAR A42.