Hydroxyethylcellulose Natrosol 250 HR/HHR from Ashland (CAS 9004‑62‑0) is a proven non‑ionic thickener for water‑based systems. The powder dissolves completely in water and at 25 °C a 1 % solution exhibits a dynamic viscosity of 3000‑5000 mPa·s. Its non‑ionic nature provides stability across pH 2‑10, preventing interactions with pigments and additives while delivering a uniform coating and robust film formation. Natrosol 250 HR/HHR is a modified cellulose where a portion of the hydroxyl groups are etherified with ethyl groups, enhancing solubility in cold water and improving water retention in the dried film. This property is valuable in formulations that require controlled solvent evaporation and resistance to cracking during drying. The polymer is commonly blended with acrylic or vinyl dispersion polymers and with silicone‑based antifoam agents, which together amplify the antifoam performance without compromising viscosity. In paint and coating formulations Natrosol 250 HR/HHR is often paired with plasticizers and surface‑active modifiers to achieve smoother, higher‑gloss finishes. Its high molecular weight contributes to excellent film‑forming ability, increased mechanical durability, and a low tendency to generate foam, which simplifies application and reduces surface defects. Typical usage levels range from 0.5‑2 % by weight, providing the desired viscosity while maintaining transparency—critical for semi‑transparent or lacquer coatings. For optimal results the polymer should be pre‑dispersed in water at 20‑30 °C with vigorous stirring, then added to the main emulsion under continuous mixing to avoid localized thickening. The product is stable during long‑term storage and does not require additional stabilizers, streamlining the production process and lowering overall cost. Storage recommendations are a dry, cool environment (≤ 25 °C) in the original sealed container, protected from moisture, preserving performance for up to 24 months.
| Тип | НЭЦ |
| Вязкость (2%, 25°C) | 3000–5000 мПа·с (HR) |
| Ионность | Неионная |
Bags 25 kg
Store Hydroxyethylcellulose Natrosol 250 HR/HHR in a dry, well‑ventilated area at ambient temperatures (approximately +15 °C to +30 °C), protected from direct sunlight and condensation. When the packaging remains intact, the typical shelf life is about 24 months; exposure to moisture or clumping may degrade performance. During handling wear protective gloves and safety glasses, avoid inhaling dust, and keep away from ignition sources. Ensure the container stays sealed and undamaged to prevent moisture ingress and contamination.
