Toynol® DS-298 Grinding Dispersant for High-Solids Color Paste
Toynol® DS-298 Grinding Dispersant for High-Concentration Color Concentrates in Waterborne Systems
Abstract
Toynol® DS-298 is a high-efficiency grinding dispersant developed to solve the dispersion stability problems of high-concentration color concentrates in the production of waterborne coatings, inks, and adhesives, especially skilled at handling carbon black and other high-specific-surface-area pigments. Its chemical description is a solution of an aminoalkyl hydroxyl adduct of polystyrene-maleic anhydride polymer. Its core functions are significantly reducing grinding system viscosity, improving pigment dispersion efficiency, and ensuring high-concentration concentrates have excellent heat and storage stability. The product performs excellently on various pigments including titanium dioxide, carbon black, phthalocyanine blue, and organic red, and is APEO-free, in line with environmental trends, making it a suitable option for preparing high-performance, high-concentration waterborne color concentrates.
Core Product Information
| Item | Specification |
|---|---|
| Model | DS-298 |
| Chemical Description | Solution of an aminoalkyl hydroxyl adduct of polystyrene-maleic anhydride polymer |
| Appearance (25 °C) | Yellow translucent liquid |
| Non-volatile content (%) | 40 |
| Solvent | Water |
Key Performance Indicators
| Performance | Value |
|---|---|
| Applicable system | Waterborne systems |
| Core functions | Grinding dispersion, viscosity reduction, stabilization, especially suitable for high-concentration concentrates |
| Highlight | Excellent performance on hard-to-disperse pigments such as carbon black |
| Environmental properties | APEO-free |
Main Features and Advantages
- High-efficiency viscosity reduction and dispersion: Rapidly wets pigment particles, significantly reduces the viscosity of high-pigment-content grinding systems, improves grinding efficiency, and improves concentrate color development.
- Excellent stability: Provides strong steric hindrance, effectively prevents pigment re-coarsening and settling, and is especially suitable for preparing high-concentration concentrates while ensuring long-term storage stability.
- Outstanding specialty: Shows exceptional dispersion performance on carbon black pigment, making it the preferred choice for preparing high-concentration carbon black concentrates.
- Environmentally friendly and safe: APEO-free formulation, compliant with increasingly stringent environmental regulations.
Recommended Application Fields
- High-performance industrial coatings: Especially suitable for construction machinery coatings, automotive coatings, coil coatings, and others requiring high tinting strength or dark coatings, efficiently dispersing carbon black and other pigments for excellent hiding power and blackness.
- Universal concentrates: A well-suited dispersant for coating and concentrate plants producing universal tinting concentrates (especially high-concentration black and blue pastes), ensuring concentrate compatibility and stability in multiple base paints.
- High-end waterborne inks: Used in the preparation of waterborne flexographic and gravure inks to effectively and stably disperse high-content phthalocyanine blue, organic red, and carbon black pigments, ensuring ink color strength, printability, and storage stability.
- Specialty adhesives: Used in high-performance adhesive products requiring coloring, ensuring high-concentration pigments are uniformly and stably dispersed without affecting final product performance.
- Efficient processing of carbon black pigments: Designed specifically for hard-to-disperse pigments such as carbon black, fully realizing their tinting potential; a quality additive for carbon black processing and applications.
Usage and Recommended Dosage
Addition sequence: For optimum performance, it is recommended to add the Toynol® DS-298 dispersant to water first, then the wetting agent and other additives, and finally the pigment for grinding.
Synergistic use: It is recommended to combine with Toynol® wetting agent FS-204E to accelerate wetting, and add Toynol® defoamer Foamic 021 to eliminate grinding foam.
Recommended dosage:
- Resin-free dispersion (concentrate preparation):
Titanium dioxide (70% concentration): dispersant solids at 3-7% based on pigment weight
Carbon black (40% concentration): dispersant solids at 20-50% based on pigment weight
Phthalocyanine blue (45% concentration): dispersant solids at 25-50% based on pigment weight
Organic red (45% concentration): dispersant solids at 25-50% 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.
- 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: Why is DS-298 dispersant especially suitable for preparing high-concentration carbon black concentrates?
A: Carbon black pigment has a large specific surface area and agglomerates easily, making it difficult to disperse and stabilize. The molecular structure of DS-298 is specially designed to adsorb strongly onto carbon black particle surfaces, forming an effective steric hindrance layer, thereby significantly reducing grinding viscosity and preventing particle re-agglomeration, ensuring the prepared high-concentration carbon black concentrates have good flowability and storage stability.
Q: When using DS-298, why is it recommended to combine it with wetting agent FS-204E and defoamer Foamic 021?
A: This is an optimized additive combination. FS-204E wetting agent accelerates the initial wetting of pigments, working synergistically with DS-298 to further improve dispersion efficiency; since foaming easily occurs during grinding, Foamic 021 effectively eliminates this foam, preventing bubbles from affecting grinding results and final product quality. The correct addition sequence is key to achieving this synergy.
Q: According to the reference formulations, the DS-298 dosage varies greatly for different pigments. How should this be understood?
A: This is mainly determined by differences in specific surface area and surface chemical properties among pigments. For example, carbon black and organic pigments have far larger specific surface areas than titanium dioxide and require more dispersant molecules to fully coat their surfaces, hence higher dosage ratios. Following the recommended dosage range and determining the optimum point for the specific formulation through testing is key to ensuring performance and cost-effectiveness.
Q: If the stored DS-298 product shows slight phase separation or viscosity change, will it affect use?
A: This product is a polymer solution; after long-term standing, slight physical state changes (such as changes in uniformity) may occur, which is normal. Stir thoroughly before use; its chemical performance and dispersion effect are generally unaffected. If uncertain, a small-scale test or consulting our technical support is recommended.
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