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Non-ionic, hydrophobically modified polyurethane (HEUR) rheology modifier.
Delivers excellent flow and leveling while providing strong sag resistance in waterborne systems.
Compatible with a broad range of anionic and non-ionic surfactants and co-thickeners.
Enables low-shear viscosity build and efficient high-shear thinning for spray and roll application performance.
Stable across typical pH ranges (6–10) and tolerant to moderate levels of electrolytes.
Architectural interior and exterior flat and semi-gloss latex paints.
Waterborne industrial maintenance coatings.
Wood stains and clear finishes.
Textile printing pastes and functional coatings.
Adhesives and construction sealants requiring controlled rheology.
| Chemical Type | Hydrophobically Modified Polyurethane (HEUR) |
| Product Form | Liquid |
| Appearance | Opaque white to off-white dispersion |
| pH (1% aqueous solution) | 7.0–9.0 |
| Active Content (wt%) | 30.0 ± 1.0% |
| Viscosity (Brookfield RVT, Spindle #3, 20 rpm, 25°C) | 500–1,500 cP |
| Freeze-Thaw Stability | Pass (after 3 cycles) |
| Primary Applications | Rheology modification in waterborne coatings and adhesives |
Q1: What type of rheology does RM-8W provide in waterborne formulations?
A: RM-8W is a non-ionic polyurethane (HEUR) thickener that delivers strong pseudoplastic (shear-thinning) behavior, enhancing sag resistance at rest while enabling good flow and leveling during application.
Q2: Is RM-8W compatible with other rheology modifiers or associative thickeners?
A: Yes — RM-8W is commonly used in combination with cellulosic or acrylic associative thickeners to fine-tune rheological profiles, though compatibility testing is recommended to avoid antagonistic interactions or viscosity loss.
Q3: How should RM-8W be incorporated into a formulation for optimal performance?
A: It is typically added late in the manufacturing process — after pigments, fillers, and primary binders — under moderate agitation. Pre-dilution with water or co-solvent may improve dispersion and reduce localized over-thickening.
Q4: Does RM-8W require pH adjustment or specific ionic strength conditions to function effectively?
A: As a non-ionic HEUR thickener, RM-8W is not sensitive to pH and performs consistently across a broad pH range (approximately 4–10). Its thickening efficiency can be influenced by surfactant type and concentration, so formulation balance is key.
Q5: What are typical dosage ranges for RM-8W in architectural coatings?
A: Dosage depends on formulation requirements and desired viscosity, but RM-8W is generally used at low concentrations — typically ranging from 0.1% to 2.0% by weight of the total formulation — to achieve target rheology without compromising film properties.
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E-mail: wangxingqiang@ericwchem.com
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