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Ashland NATROSOL 250B TYPE is a high-quality biostable hydroxyethyl cellulose (HEC) aqueous thickener in the NATROSOL™ 250 series. Custom-designed for aqueous systems such as coatings, inks and daily chemicals, it achieves uniform ethylene oxide bonding through special processes. Featuring high-efficiency thickening and excellent enzyme decomposition resistance
| Chemical Type | Non-ionic hydrophilic hydroxyethyl cellulose derivative (HEC derivative) |
| Physical Form | White powder |
| Core Characteristics | Efficient thickening, biostability, anti-sagging, pigment stabilization, broad compatibility |
| Active Content | 100 % |
| 1% Solution Appearance | Transparent |
| Solution pH Value | 6.0 - 8.5 |
| Density (25℃) | 0.55 - 0.75 g/cm³ |
| Ablation Residue | < 5.5 % |
| Moisture Content | < 5.0 % |
Efficient Thickening Regulation - Excellent thickening efficiency, precisely controlling and enhancing system rheology
Delayed Hydrolysis Adaptation - Controllable hydrolysis rate, adapting to the timing requirements of specific production processes
Excellent Anti-Sagging Performance - Enhances system anti-sagging ability, ensuring construction and molding stability
Pigment Stabilization Enhancement - Provides pigment anti-settling and redispersibility, optimizing system uniformity
Aqueous Architectural Coatings - Used in interior and exterior emulsion paints to ensure long-term storage and application stability
Aqueous Ink Printing - Used for thickening aqueous inks to maintain system rheological stability and printability
Daily Chemical Cleaning Products - Used in various aqueous cleaners to maintain viscosity and use texture for a long time
Cosmetic Formulations - Used in aqueous skin care products and personal care products to improve long-term formulation stability
| Chemical Type | Non-ionic hydrophilic hydroxyethyl cellulose derivative (HEC derivative) |
| Physical Form | White powder |
| Core Characteristics | Efficient thickening, biostability, anti-sagging, pigment stabilization |
| Active Content | 100 % |
| 1% Solution Appearance | Transparent |
| Solution pH Value | 6.0 - 8.5 |
| Density (25℃) | 0.55 - 0.75 g/cm³ |
| Ablation Residue | < 5.5 % |
| Moisture Content | < 5.0 % |
Q1: What is the primary functional role of NATROSOL 250B TYPE in aqueous formulations?
A: NATROSOL 250B TYPE functions primarily as a non-ionic, water-soluble rheology modifier and thickener. It provides excellent viscosity development, pseudoplastic flow behavior, and good suspension capability in low-to-medium pH systems, making it especially valuable in architectural coatings, adhesives, and personal care products.
Q2: How does NATROSOL 250B TYPE compare to other NATROSOL grades in terms of viscosity performance and molecular weight?
A: NATROSOL 250B TYPE is a medium-viscosity grade within the NATROSOL HEC portfolio, offering a balanced combination of thickening efficiency and ease of incorporation. Compared to lower-viscosity grades (e.g., 250 HHX), it delivers higher solution viscosity at equivalent concentrations; compared to high-viscosity types (e.g., 250 HHXR), it offers improved shear recovery and reduced mixing energy requirements.
Q3: Is NATROSOL 250B TYPE compatible with common preservatives and biocides used in water-based formulations?
A: Yes, NATROSOL 250B TYPE demonstrates broad compatibility with commonly used isothiazolinone, formaldehyde-releasing, and organic acid-based preservatives. Its non-ionic nature minimizes interactions with ionic biocides, supporting stable microbial protection throughout shelf life — though compatibility should always be verified under actual formulation conditions.
Q4: What are key handling and dispersion best practices for NATROSOL 250B TYPE?
A: To avoid clumping and ensure full hydration, NATROSOL 250B TYPE should be dispersed gradually into cold or ambient water under high-shear mixing. Pre-blending with water-soluble salts or sugars can aid dispersion, and allowing sufficient aging time (typically 15–60 minutes) ensures complete dissolution and optimal viscosity development.
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