Toynol® D-502A Low-Foam Wetting Agent
Toynol® D-502A Low-Foam Wetting Agent for Waterborne Systems
Abstract
Toynol® D-502A is a low-foam wetting agent developed to address insufficient substrate wetting and foam control in high-speed application of waterborne systems. It is an acetylenic diol and branched alcohol polyether surfactant (nonionic). It significantly reduces static and dynamic surface tension (static surface tension as low as 34.1 mN/m in a 0.1% aqueous solution), delivers excellent dynamic wetting, and combines defoaming and foam-control functions. Compared with conventional solutions, it is particularly suited to high-speed application scenarios and offers good compatibility with waterborne systems, making it a suitable option for high-speed production processes such as printing inks, waterborne coatings, inks and adhesives.
Core Product Information
| Item | Specification |
|---|---|
| Product Model | D-502A |
| Chemical Type | Acetylenic diol and branched alcohol polyether surfactant (nonionic) |
| Appearance (25°C) | Pale yellow to yellow liquid |
| Active Matter (wt.%) | 75 |
| Cloud Point (°C) | 41 |
| Density (g/cm³) | 1.0123 |
| Water Solubility | Miscible with water |
Key Performance Indicators
| Performance | Value |
|---|---|
| Static surface tension (0.1% aqueous solution) | 34.1 mN/m |
| Dynamic surface tension (0.1% aqueous solution, at 6 bubbles/s) | 39.0 mN/m |
| Foam characteristics | Low foam, with defoaming and foam-control performance |
| Application suitability | Suitable for high-speed application |
Main Features and Advantages
- Highly efficient dynamic wetting: Significantly reduces static and dynamic surface tension, improving substrate wetting efficiency in high-speed application.
- Low-foam performance: Provides sustained defoaming and foam-control during production and use, avoiding process interference.
- Application-friendly: Particularly suitable for high-speed spraying, roller coating and other high-speed application scenarios.
- Excellent compatibility: Compatible with waterborne resins and additives, subject to compatibility testing.
Recommended Application Fields
- Printing inks: Improves flow and anti-spatter of inkjet and thermal-transfer inks.
- Waterborne inks: Used in flexographic and gravure printing inks to improve wetting on difficult substrates such as PE and PET, improving print uniformity at high speed — ideal for packaging and label printing.
- Industrial coatings: In high-speed spraying of engineering machinery coatings and automotive coatings, enhances wetting on metal and plastic substrates, helping reduce defects such as cratering and fisheyes, and improving film appearance.
- Waterborne adhesives: In packaging and construction adhesives, improves spreading on substrates, increases initial tack and application efficiency — suitable for automated coating lines.
- Leather chemicals: In leather finishes, optimizes wetting of leather surfaces, improving coating uniformity and hand feel for high-end footwear and bag leather goods.
- Metalworking fluids: In cutting fluids and cleaners, enhances penetration into metal surfaces while suppressing foam, improving machining accuracy and efficiency.
- Paper coatings: In specialty and packaging paper coating, improves coating wetting of the paper base, ensuring a smooth, defect-free coating.
Usage and Recommended Dosage
Addition sequence: Add after other surfactants and polymers, and before pigments, fillers and other solids.
Mixing: Continue stirring for 15–30 minutes after addition to ensure thorough mixing. If viscosity rises, mild heating may be applied.
Low-temperature handling: If the product solidifies or separates, heating and stirring restores its original state without affecting performance.
Recommended dosage: Typically 0.2%–2% of the total formulation; determine the optimal level through dosage screening.
Safety and Storage
- Safety precautions: Wear appropriate protective equipment (such as safety glasses and gloves). On skin contact, rinse immediately with clean water. If the product gets into the eyes, rinse thoroughly 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.
- Packaging: 25 kg drums, 200 kg drums.
- Shelf life: 24 months from the date of manufacture under recommended storage conditions.
Frequently Asked Questions
Q: What is the practical significance of D-502A’s “dynamic wetting” in high-speed application?
A: Dynamic wetting refers to the ability of a liquid to spread rapidly when it contacts a substrate at high speed. D-502A significantly lowers dynamic surface tension (39.0 mN/m at 6 bubbles/s), ensuring that the liquid wets the substrate instantly during high-speed spraying and printing, helping reduce defects such as skip coating and cratering caused by poor wetting.
Q: How can this product deliver both “wetting” and “low foam” at the same time?
A: D-502A’s molecular structure contains acetylenic diol and branched alcohol polyether groups. It reduces surface tension to improve wetting, while also destabilizing the foam film to suppress foam generation. The two effects work synergistically to meet both high-efficiency wetting and low-foam requirements.
Q: Is the product’s performance stable at elevated temperatures?
A: Yes. The cloud point of D-502A is 41°C, and performance is stable below this temperature. If the system temperature approaches or exceeds the cloud point, we recommend verifying persistence through testing.
Q: How do I determine the optimal dosage through testing?
A: Start at 0.5%, then prepare three gradient samples at 0.2%, 1.0% and 2.0%. Determine the most cost-effective dosage by testing static and dynamic surface tension, observing foam, and evaluating actual application performance.
Contact Us
- For free samples, detailed technical data sheets (TDS) or safety data sheets (SDS), or any technical questions, please contact us:
- 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