RT737 HEUR Thickener for High-Gloss Coatings
RT737 is a non-ionic superior hydrophobic modified polyurethane rheology modifier designed for high-gloss, low-VOC water-based coating formulations. With high solid content and excellent thickening ratio, it effectively improves medium-to-high shear viscosity while delivering outstanding flow and leveling performance. Achieve a high gloss, durable and full-film appearance.
- Exceptional brush retention
- Waterseparation resistance
- Outstanding splash resistance
- Excellentfilm-forming properties
- Antimicrobial and anti-mold properties
- Low foaming with high transparency
RT737 Polyurethane Thickener TDS
- Technical Data Sheet
| Property | Typical values |
| Appearance | A slightly turbid to transparent liquid with a faint characteristic odor. |
| Solid content(wt%) | 48.0±1 |
| pH value(20℃) | 7.0±1 |
| Density(g/ml,20℃) | 1.04±0.02 |
| Brookfield viscosity(cP, 25℃) | ≤8000 |
Use & Compatibility
- RT737 is recommended to be added at a concentration of 0.05-5.0%. After dilution, it should be slowly added under stirring conditions and thoroughly dispersed at high speed.
- It is suggested to add RT737 before the emulsion to achieve high gloss performance.
- The additive amount should be appropriately adjusted according to the viscosity requirements of the product.
- RT737pu thickener has good compatibility with cellulose and alkali-swellable thickeners, and can be freely combined with them.
- Itcan be used as the main thickener alone, or combine with other thickener to obtain excellent fluidity.
RT737 HEUR VS Other Thickeners
| Type | Main Strength |
|---|---|
| Hydroxyethyl Cellulose(HEC) | Water retention, traditional viscosity building |
| Alkali-Swellable Emulsion (ASE) | Cost-effective thickening, pH-responsive viscosity control |
| RT737 HEUR | High gloss, leveling, sprayability, and premium film appearance |
RT737 PU Rheology Modifier Typical Applications
RT737 PU rheology modifier is engineered for diverse coating formulations, enabling the preparation of interior and exterior wall paints ranging from matte to high-gloss finishes.
RT737 PU thickener prevents fogging defects while ensuring optimal film fullness. This makes it especially suitable for spraying application formulations.
RT737 HEUR rheology modifier is particularly suitable for high-gloss, high-hardness surface finishing.
RT737 HEUR does not rely on high-viscosity-building networks and  not compromise film compactness. It’s suitable for high-solids systems to enhance paint film density.
RT737 PU rheology modifier can thickening effectively under low solid content with good water retention and separation resistance.
Package and Storage
RT737Â HEUR Thickener
Package: Packaged in 25kg and 50kg IBC plastic drums, the container remains sealed.
The shelf life and Storage : With a storage period of 12 months at 5-35°C and protected from light and heat.
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FAQ About RT737
Yes, it can work as a primary thickener in certain formulations, especially for high gloss and flow properties are required. But in most cases, it is combined with cellulose ethers together to balance low-shear viscosity and anti-sag performance.
RT737 polyurethane thickener is compatible with transparent coating systems, it can be used in clear coatings if minimal haze is required.
Choice of Diluent:Â It is recommended to use deionized water or a water/glycol mixture for dilution.
Solvent Tolerance: RT737 hydrophobically modified polyurethane exhibits excellent tolerance toward co-solvents commonly found in aqueous systems; this property delivers effective leveling performance for high-solvent formulations. However, its thickening efficiency may compromise if the system contains strong solvents.
Balance between Leveling and Sag Resistance: RT737 polyurethane-based additive exhibits moderate thixotropy. Its rate of viscosity recovery is faster than that of cellulose-based thickeners but slower than certain alkali-swellable emulsions.
Yes, RT737Â is tin-free and environmentally friendly.
