Toynol® HD-20 Water-Resistant Dispersant
Toynol® HD-20 High-Performance Water-Resistant Dispersant
Abstract
Toynol HD-20 is a high-performance dispersant developed to solve the dispersion problems of inorganic powders (such as titanium dioxide and carbon black) in waterborne industrial systems such as architectural coatings and inks. Its chemical description is a mixture of styrene-maleic anhydride copolymer and acetylenic diol, and its main functions are rapid reduction of grinding viscosity, excellent long-term dispersion stability, and significantly improved water resistance of the final film. Compared with conventional sodium/ammonium polyacrylate dispersants, its core advantage is solving the problem of film blistering upon contact with water, and it is APEO-free and compliant with environmental regulations, making it a suitable option for high-performance architectural exterior wall paints, waterborne printing inks, and other applications with stringent water-resistance requirements.
Core Product Information
| Item | Specification |
|---|---|
| Model | HD-20 |
| Chemical Description | Mixture of styrene-maleic anhydride copolymer and acetylenic diol |
| Appearance (25 °C) | Light yellow to yellow liquid |
| Color (Pt-Co) | ≤350 APHA (typical value: 200) |
| Solid Content | 19-22% |
| Solubility | Readily soluble in water |
Main Features and Advantages
- High-efficiency dispersion and viscosity reduction: Extremely strong wetting and coating ability for hard-to-disperse powders such as titanium dioxide and carbon black, rapidly reducing grinding slurry viscosity and improving production efficiency and color development.
- Excellent water resistance: The unique flocculation-control mechanism and strong charge repulsion impart excellent water resistance to the final film, thoroughly solving the film blistering problem caused by strongly hydrophilic dispersants.
- Broad-spectrum applicability: Suitable for dispersing various inorganic powders (titanium dioxide, carbon black, kaolin, calcium carbonate, etc.) in waterborne systems, with a wide range of applications.
- High cost-effectiveness: Reasonable dosage, able to effectively replace imported competitors and reduce overall customer cost.
Recommended Application Fields
- Architectural coatings: Especially recommended for high-performance architectural exterior wall coatings, elastic coatings, stone-textured coatings, and other fields with high requirements for water resistance and weatherability.
- Waterborne printing inks: Used in pigment paste preparation, providing excellent dispersion stability and color saturation.
- Industrial coatings: Suitable for dispersion of inorganic pigments and fillers in waterborne industrial coatings and leather finishing agents.
- Color concentrate preparation: Used in the production of universal or custom waterborne color concentrates, ensuring storage stability and color development.
- Powder surface modification: Used for surface treatment of inorganic powders to improve their compatibility and dispersibility in waterborne systems.
Usage and Recommended Dosage
Addition sequence: Must be added to water before the resin and pigment to ensure optimum dispersion.
Operating method: Can be added directly or pre-diluted according to process needs. Stir continuously for 15-30 minutes after addition to ensure uniform mixing.
Recommended dosage (based on pigment weight):
- Titanium dioxide: recommended dosage 3%-7%.
- Carbon black: recommended dosage 80%-150% (carbon black has a large specific surface area and requires a higher dosage).
- Other powders (such as kaolin, calcium carbonate, etc.): recommended dosage 5%-50%.
- Note: The specific optimum dosage should be determined through dosage screening based on site conditions.
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 with water.
- Storage conditions: Store sealed in a cool, well-ventilated, dry place. If the product solidifies or crystallizes during transport or storage, warm it to its melting point and stir to restore its original state without affecting performance.
- Packaging: 25 kg drums, 200 kg drums.
- Shelf life: Under the specified storage conditions, the shelf life is 2 years from the date of manufacture.
Frequently Asked Questions
Q: What is the core advantage of Toynol HD-20 compared with ordinary polyacrylate dispersants?
A: The core advantage is excellent water resistance. Conventional dispersants have too many hydrophilic groups, which can cause film blistering upon contact with water. Through its unique chemical structure, HD-20 greatly improves the film’s water resistance while providing excellent dispersibility, making it especially suitable for exterior wall coatings and other outdoor environments.
Q: When dispersing carbon black, why is the recommended dosage of HD-20 so high?
A: Carbon black pigment has an extremely high specific surface area and requires more dispersant molecules to coat each pigment particle to overcome its strong cohesive force. The 80%-150% dosage is a common industry range based on carbon black weight, intended to ensure that every carbon black particle is fully wetted and dispersed for optimum tinting strength and stability.
Q: Can this product be used in gloss-demanding topcoat systems? Will it affect gloss?
A: Yes. HD-20 has good compatibility, and its flocculation-control effect helps the stable arrangement of pigment particles, which may have a positive effect on gloss or at least no negative effect. However, we recommend confirming the specific effect on final film gloss through testing when adjusting formulations.
Q: What should be noted when using HD-20?
A: The most critical point is the addition sequence: always add it to water first and disperse uniformly, then add the pigment for grinding. An incorrect sequence will seriously impair dispersion. Second, for special systems, always conduct small-scale testing to determine the optimum dosage.
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