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Delivers excellent rheology control with high-shear viscosity stability and low-shear thickening efficiency.
Provides outstanding compatibility with anionic surfactants and common water-based formulation ingredients.
Offers superior film clarity and minimal impact on gloss in clear coatings and architectural paints.
Enables efficient sag resistance and leveling balance without compromising spray or brush application performance.
Exhibits robust freeze-thaw stability and long-term storage stability in aqueous systems.
Architectural interior and exterior flat and low-sheen latex paints.
High-performance industrial maintenance coatings.
Water-based wood stains and clear finishes.
Acrylic emulsion-based adhesives and sealants.
Decorative wall coatings and textured plasters.
| Chemical Type | Polyurethane associative thickener (non-ionic) |
| Product Form | Aqueous solution |
| Appearance | Clear to slightly hazy, colorless to pale yellow liquid |
| pH (1% in water) | 6.0 – 7.5 |
| Active Content (wt%) | 30.0 ± 1.0% |
| Viscosity (mPa·s, Brookfield RVT, Spindle #3, 20 rpm, 25°C) | 500 – 1500 |
| Primary Applications | Rheology modifier for waterborne coatings and construction chemicals |
| Key Benefits | Shear-thinning behavior, low odor, low VOC contribution, easy handling |
Q1: What is the primary thickening mechanism of Acrysol RM-8W?
A: Acrysol RM-8W functions as an associative thickener, relying on hydrophobic association between its polyurethane backbone and surfactants or other hydrophobic domains in the formulation. This reversible network formation imparts viscosity and provides excellent rheological control, particularly high-shear thinning and good sag resistance.
Q2: Is RM-8W compatible with common waterborne architectural coatings systems?
A: Yes, RM-8W is specifically designed for use in waterborne architectural coatings, including interior and exterior paints, primers, and texture coatings. It demonstrates good compatibility with acrylic and styrene-acrylic emulsions, typical co-thickeners (e.g., HEC), and standard anionic and nonionic surfactants found in these systems.
Q3: How should RM-8W be incorporated into a formulation?
A: RM-8W is typically added during the let-down stage, after the pigment grind and before final additives. It can be diluted with water or propylene glycol prior to addition to ensure uniform dispersion. Avoid high-shear mixing immediately after addition to prevent premature breakdown of the associative structure.
Q4: Does RM-8W offer any performance advantages over cellulosic thickeners?
A: Compared to cellulosics, RM-8W delivers superior flow and leveling, reduced spatter during application, improved scrub resistance, and better tolerance to electrolytes and freeze-thaw cycling. Its associative nature also contributes to enhanced film integrity and reduced water sensitivity in the dried film.
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E-mail: wangxingqiang@ericwchem.com
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