Toynol® DS-258 Universal Grinding Dispersant
Toynol® DS-258 Universal Grinding Dispersant for Waterborne Systems
Abstract
Toynol® DS-258 is a high-efficiency universal grinding dispersant developed to solve the dispersion stability problems of various pigments in the production of waterborne coatings, inks, and other fields. Its chemical description is a solution of an aminoalkyl hydroxyl adduct of polystyrene-maleic anhydride polymer. Its core functions are significantly reducing grinding viscosity, improving pigment dispersion efficiency, and ensuring long-term storage stability of high-concentration concentrates. The product is highly versatile, showing excellent results across various inorganic and organic pigments including titanium dioxide, iron oxide yellow, carbon black, phthalocyanine blue, phthalocyanine green, and organic red. Compared with conventional approaches, it is APEO-free, more environmentally friendly and safe, and is a suitable option for modern waterborne formulation systems pursuing broad applicability and stable production.
Core Product Information
| Item | Specification |
|---|---|
| Model | DS-258 |
| Chemical Description | Solution of an aminoalkyl hydroxyl adduct of polystyrene-maleic anhydride polymer |
| Appearance (25 °C) | Amber translucent liquid |
| Non-volatile content (%) | 40 |
| Solvent | Water |
Key Performance Indicators
| Performance | Value |
|---|---|
| Applicable system | Waterborne systems |
| Core functions | Grinding dispersion, viscosity reduction, stabilization |
| Highlight | Strong versatility, especially suitable for preparing high-concentration concentrates |
| Environmental properties | APEO-free |
Main Features and Advantages
- High-efficiency and universal: Excellent dispersion performance on titanium dioxide, carbon black, iron-based pigments, and various organic pigments, reducing system viscosity, improving grinding efficiency, and improving color development.
- Lasting stability: Provides strong steric hindrance, effectively prevents pigment re-coarsening and settling, and is especially suitable for preparing high-concentration concentrates while ensuring their storage stability.
- Environmentally friendly and safe: APEO-free formulation, compliant with increasingly stringent environmental regulations.
- Economical and efficient: One product covers multiple pigment systems, simplifying procurement and inventory management and reducing overall cost.
Recommended Application Fields
- Architectural coatings: Widely used for pigment dispersion in interior and exterior wall latex paints, especially suitable for producing universal tinting concentrates, ensuring the compatibility and color stability of titanium dioxide and various color pigments in multiple base paints.
- Waterborne industrial coatings: Suitable for high-efficiency grinding of various pigments in formulations such as construction machinery coatings, agricultural machinery coatings, and wood coatings, ensuring film color uniformity and gloss.
- Packaging and printing inks: Used in the preparation of waterborne flexographic and gravure inks to effectively disperse phthalocyanine and organic pigments, ensuring ink color saturation, printability, and stability.
- Waterborne adhesives: Used in adhesive products requiring coloring, ensuring pigments are uniformly and stably dispersed without affecting final bonding performance and appearance.
- Paper coating and pigment processing: Helps pigment dispersion in paper coating formulations to obtain a uniform, smooth coating.
Usage and Recommended Dosage
Addition sequence: For optimum performance, it is recommended to add the Toynol® DS-258 dispersant to water first, then the wetting agent and other additives, and finally the pigment for grinding.
Dilution: This product is an aqueous solution and can generally be used directly.
Recommended dosage:
- Resin-free dispersion (concentrate preparation):
Titanium dioxide (70% concentration): dispersant solids at 2-7% based on pigment weight
Carbon black (40% concentration): dispersant solids at 20-50% based on pigment weight
Iron oxide yellow (68% concentration): dispersant solids at 3-7% based on pigment weight
Phthalocyanine blue/green/organic red (45% concentration): dispersant solids at 16-50% based on pigment weight
- Resin-containing dispersion (direct grinding): dispersant solids at 1-5% of the total formulation
- Note: The above are empirical dosages; the optimum dosage should be determined through testing based on the specific formulation and process.
Safety and Storage
- Safety precautions: Wear appropriate personal protective equipment (such as safety goggles and gloves) during handling. If the product contacts the skin, wash with water and soap; if it enters the eyes, rinse immediately with plenty of water and seek medical attention.
- Storage conditions: Store sealed in a cool, well-ventilated, dry place, away from high temperatures and freezing. Recommended storage temperature range: 5 °C – 40 °C.
- Packaging: 25 kg drums, 200 kg drums.
- Shelf life: Under the specified storage conditions, the shelf life is 24 months from the date of manufacture.
Frequently Asked Questions
Q: Is DS-258 dispersant effective on the same type of pigment from different manufacturers (such as different brands of phthalocyanine blue)?
A: Yes, DS-258 has good versatility. Its molecular structure design allows it to effectively adsorb onto pigment surfaces from different sources. However, for specific pigment brands, especially those with special surface treatment processes, small-scale testing is recommended to determine the optimum dosage for the best dispersion effect and cost-performance.
Q: In resin-containing grinding systems, will DS-258 addition compete with the resin for adsorption and affect performance?
A: DS-258 is highly compatible with most common waterborne resins. Its molecular structure allows it to preferentially adsorb onto pigment surfaces, forming a stable steric hindrance layer. Following the correct addition sequence (dispersant first, then resin and pigment) is key, as it ensures the dispersant works fully. In complex systems, dosage screening is a reliable way to determine the optimum dosage.
Q: If high-concentration concentrates prepared with DS-258 show sediment after a period of storage, does this mean the product has failed?
A: Slight sediment is a common phenomenon in high-concentration concentrates and can be redispersed by simple stirring; this does not mean the product has failed. The main role of DS-258 is to prevent the pigment from forming hard, non-redispersible sediment (hard settlement). If the sediment is loose and easily stirred up, the dispersant is working well. Adding an appropriate anti-settling agent is recommended for better can-opening performance.
Q: Which additives are recommended to combine with DS-258 for better results?
A: The following additives are recommended for synergistic use to optimize the entire grinding process:
Wetting agent: such as Toynol® FS-204E, which can accelerate the initial wetting of pigments.
Defoamer: such as Toynol® Foamic 024, which can effectively eliminate foam generated by surfactants during grinding.
Neutralizer: such as AMP-95, used to adjust the system pH, sometimes enhancing dispersion stability (especially in carbon black and other systems).
The general addition sequence is: dispersant → wetting agent → defoamer → pigment.
Contact Us
- If you need free samples, a detailed Technical Data Sheet (TDS), or a Safety Data Sheet (SDS), or if you have any technical questions, please contact us at any time:
- Company: Tianjin Hi-Perferal Advanced Materials Co., Ltd.
- Address: No. 2-1, Zhenghua Road, Caozili, Wuqing District, Tianjin
- Technical service hotline: 022-82910362
- Website: www.surfychem.com