Toynol® ET-204 Wetting Dispersant for Conductive Materials
Toynol® ET-204 Wetting and Dispersing Agent for Conductive Materials in Waterborne Systems
Abstract
Toynol® ET-204 is a high-efficiency wetting and dispersing agent developed to solve the dispersion problems of conductive materials in waterborne systems. Its chemical description is an aminoalkyl hydroxyl adduct of styrene-maleic anhydride copolymer. Its core functions are significantly reducing the viscosity of conductive material dispersion systems, greatly shortening dispersion time, and effectively improving material conductivity and dispersion stability. The product is especially suitable for new conductive materials such as conductive carbon black, carbon nanotubes, and graphene, as well as the preparation of lithium battery anode slurries, achieving excellent results at a dosage of 15-30% and featuring a wide electrochemical window of 0.1 V-4.8 V (vs. Li/Li). Its APEO-free environmental profile makes it a suitable option for waterborne conductive material dispersion in high-end fields such as new energy and electronic devices.
Core Product Information
| Item | Specification |
|---|---|
| Model | ET-204 |
| Chemical Description | Aminoalkyl hydroxyl adduct of styrene-maleic anhydride copolymer |
| Appearance (25 °C) | Yellow translucent liquid |
| Non-volatile content (%) | 30 |
| Solvent | Water |
Key Performance Indicators
| Performance | Value |
|---|---|
| Applicable system | Waterborne systems |
| Core functions | Wetting dispersion, viscosity reduction, conductivity improvement |
| Highlight | Wide electrochemical window (0.1 V-4.8 V vs. Li/Li), dedicated to conductive materials |
| Environmental properties | APEO-free |
Main Features and Advantages
- High-efficiency dispersion: Rapidly wets conductive carbon black, carbon nanotubes, and other materials, significantly reduces system viscosity, shortens dispersion time, and improves production efficiency.
- Conductivity enhancement: Improves material conductivity and consistency by improving dispersion.
- Electrochemical stability: Features a wide electrochemical window of 0.1 V-4.8 V (vs. Li/Li), suitable for lithium battery systems.
- Excellent stability: Provides good dispersion stability, preventing conductive material settling and agglomeration.
Recommended Application Fields
- Lithium-ion battery manufacturing: Specially used for lithium battery anode slurry preparation, including the dispersion of graphite, silicon-carbon, and other anode active materials, as well as the pretreatment of conductive agents (carbon black, carbon nanotubes, etc.), ensuring uniform and stable electrode slurry and improving battery performance.
- New conductive material processing: Suitable for waterborne dispersion of new nanoscale conductive materials such as carbon nanotubes and graphene, providing base slurry for conductive inks and conductive coatings.
- Electronic device packaging: Used for dispersion treatment of conductive fillers in electronic chemicals such as electromagnetic shielding materials and conductive adhesives.
- Specialty coating inks: Suitable for specialty coatings and ink systems requiring conductivity, such as antistatic coatings and conductive inks for printed electronics.
- New energy material R&D: Plays a key dispersing role in electrode material preparation for new energy devices such as supercapacitors and fuel cells.
Usage and Recommended Dosage
Addition sequence: For optimum performance, the Toynol® ET-204 dispersant must be added to water first and fully dissolved before adding the conductive material for dispersion.
Synergistic use: A Toynol® defoamer can be added to quickly eliminate process foam generated during grinding.
Recommended dosage:
- Conductive agent dispersion: dispersant solids at 15%-30% of the conductive agent (carbon black, carbon nanotubes, etc.) weight
- Anode active material dispersion: dispersant solids at 0.5%-3.0% of the active material weight
- Note: The optimum dosage should be determined through dosage screening; it is recommended to start from the midpoint.
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 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 does ET-204 dispersant particularly emphasize electrochemical stability? What is its significance for lithium battery applications?
A: Electrochemical stability is a key indicator of whether a material undergoes side reactions within the battery operating voltage range. ET-204 features a wide electrochemical window of 0.1 V-4.8 V (vs. Li/Li), meaning it remains stable throughout the entire operating voltage range of lithium batteries without decomposing to generate gas or damage the electrode structure, which is crucial for ensuring battery safety and cycle life.
Q: What unique advantages does ET-204 have when dispersing high-aspect-ratio nanomaterials such as carbon nanotubes?
A: Carbon nanotubes, due to their huge specific surface area and strong van der Waals forces, agglomerate easily into bundle structures. The molecular structure of ET-204 contains specific anchoring groups that effectively adsorb onto carbon nanotube surfaces, preventing re-agglomeration through steric hindrance while not destroying the tubular structure, thereby fully realizing the conductive performance of carbon nanotubes.
Q: When used in lithium battery anode slurry, is ET-204 compatible with traditional PVDF binder systems?
A: ET-204 is highly compatible with traditional PVDF binder systems. Although its waterborne nature differs from the NMP solvent system of PVDF, they can work synergistically during slurry preparation. It is recommended to first complete the dispersion of conductive agents and active materials, then add the binder solution, to ensure each component works fully.
Q: For different conductive materials, how is the optimum ET-204 dosage quickly determined?
A: A conductivity test method is recommended: prepare slurry samples at different dosages, measure their conductivity, and find the dosage range where conductivity reaches a plateau. Combined with viscosity testing and settling experiments, comprehensively evaluate dispersion and stability to determine the optimum economical 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