Toynol® DS-197 Grinding Dispersant for Organic Pigments
Toynol® DS-197 Grinding Dispersant for Organic Pigments in Waterborne Systems
Abstract
Toynol® DS-197 is a high-performance grinding dispersant developed to solve the dispersion stability problems of organic pigments in waterborne systems. Its core functions are stabilizing pigment dispersion through charge repulsion, significantly reducing grinding system viscosity, and improving color development and storage stability. Compared with conventional approaches, it offers significant flocculation control, is especially suitable for phthalocyanine and azo organic pigments, and is APEO-free, making it a suitable option for high-end applications such as waterborne printing inks and industrial coatings.
Key Performance Indicators
| Performance | Value |
|---|---|
| Centrifugal stability (3000 r/min, 10 min) | No phase separation; sediment proportion <5% |
| Viscosity control | Significantly reduces grinding viscosity, avoiding thickening and thixotropy |
| Dispersion fineness | ≤2.5 μm (grind gauge) |
| Storage stability (40 °C, 24 h) | Viscosity change within ±50% |
| Environmental properties | APEO-free |
Main Features and Advantages
- High-efficiency wetting and dispersion: Strong wetting of pigments and fillers, rapidly reduces system viscosity, and improves production efficiency.
- Flocculation-control performance: Prevents pigment agglomeration through charge repulsion, improving color concentrate uniformity.
- Broad compatibility: Good compatibility with waterborne resins and additives; overall system stability is subject to compatibility testing.
- Economical and environmentally friendly: Low dosage, APEO-free, and compliant with green chemical standards.
Recommended Application Fields
- Waterborne printing inks: Used in flexographic and gravure printing inks to efficiently disperse organic pigments such as phthalocyanine blue, phthalocyanine green, and permanent yellow, ensuring ink color saturation, print clarity, and storage stability; suitable for packaging, publication, and other high-end printing applications.
- Architectural coatings: Disperses organic pigments in interior and exterior wall latex paints, improving hue uniformity, preventing floating and flooding, and enhancing coating decorativeness and durability.
- Wood and furniture coatings: Used in waterborne wood coatings to optimize pigment dispersion and improve tinting strength and leveling; suitable for solid wood furniture, cabinets, and other surface finishing.
- Automotive coatings: Disperses organic pigments in metal substrate coating, improving coating appearance uniformity and anti-aging performance; suitable for OEM automotive paints and refinish paints.
- Can coatings: Used in metal packaging coatings for food cans, beverage cans, and others, ensuring pigment dispersion stability and meeting high-temperature sterilization process requirements.
- Anticorrosive coatings: Disperses anticorrosive pigments in industrial protection systems, improving coating barrier properties and service life.
- Leather coatings: Used in leather product finishing to improve pigment penetration and coating feel; suitable for footwear, bags, and others.
Usage and Recommended Dosage
Addition sequence: For optimum performance, the DS-197 dispersant must be added to water first, stirred until dissolved, and then the pigment is added for grinding.
Grinding process: A bead mill is recommended (glass bead diameter 0.8-1.2 mm, filling rate 70%), speed 3000 r/min, duration 60 minutes.
Synergistic use: A Toynol® wetting agent (0-0.3%) can be added to accelerate pigment wetting, and a Toynol® defoamer (0.1-0.3%) can be used to eliminate foam.
Recommended dosage:
Organic pigments: dosage at 10%-50% of pigment weight (calculated on solids content), determined through dosage screening.
Examples: Phthalocyanine green G (30% content) recommended dosage 20%; Permanent Yellow P.Y.12 (35% content) recommended dosage 20.4%.
Safety and Storage
- Safety precautions: Wear appropriate personal protective equipment (such as safety goggles and gloves) during handling. If the product contacts the skin, rinse immediately with plenty of water; if it enters the eyes, rinse immediately with plenty of water and seek medical attention.
- Storage conditions: Store sealed in a dry, cool, well-ventilated place, away from heat, sparks and open flames. Avoid 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-197 especially suitable for organic pigments (such as phthalocyanine and azo pigments)?
A: The molecular structure of DS-197 contains strong charge-repulsion groups that effectively adsorb onto organic pigment surfaces, preventing flocculation and agglomeration. Tests show that its centrifugal stability rating for pigments such as phthalocyanine green and permanent yellow is “excellent”, with dispersion fineness down to ≤2.5 μm.
Q: How is the optimum dosage determined through testing?
A: It is recommended to start from the lower end of the recommended dosage (e.g., 10% of pigment weight) and prepare screening samples (10%, 30%, 50%), then select a dosage that is both stable and economical by testing centrifugal stability, viscosity, and fineness. We can provide free samples and experimental guidance.
Q: When using DS-197, is an additional wetting agent needed?
A: This product itself has excellent wetting properties and generally does not require a separate wetting agent. However, if pigment wetting is difficult, a Toynol® wetting agent (dosage 0-0.3%) can be combined to accelerate the process.
Q: How stable is this product’s viscosity under high-temperature storage?
A: Testing shows that concentrates prepared with DS-197, when stored sealed at 40 °C for 24 hours, keep viscosity change within ±50%, showing stable performance with no thickening or thixotropy.
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