RT8512 Defoamer for Broad Aqueous Systems
RT8512 is a water-based mineral oil defoamer highly effective for coatings. It effectively controls foam formation during coating production, packaging, and application. The defoamer disperses easily into coating systems and retains its defoaming efficiency over extended periods.
- Defoaming without negative effects on the surface of the paint film.
- The temperature and pH value have no negative effect on the defoaming efficiency.
- It has good defoaming effects on both the internal and the surface foam.
- It is applicable in many kinds of aqueous systems.
RT8512 Defoamer TDS
- Technical Data Sheet
| Chemical composition | Mineral oil defoamers containing silica |
| Active content | approximately 100% |
| Appearance | Inopaque liquid, white to yellow |
| Specific gravity (25°C) | 0.8-1 g/ml |
| Viscosity | (3#,60 rpm, 25°C) 200–1600 cps |
Application Guidelines
- The paint addition amount is 0.1-0.5% of the total formula quantity.
- We recommend equal parts for pulp preparation and paint mixing stages, with specific quantities to be adjusted by the client based on actual conditions.
- Freezing should be avoided, and the product must be thoroughly stirred or shaken before use.
RT8512 vs Similar Defoamers
| Product | Best Suitable For | Key Advantage |
|---|---|---|
| RT8512 | Water-based coatings with variable conditions | Stable foam control under temperature, pH, and surfactant changes |
| RT8211A | General water-based coatings | Broad compatibility and long-lasting performance |
| RT8421 | General aqueous systems | Balanced defoaming and compatibility |
| RT8580C | Low-emission coatings | VOC/APEO/formaldehyde-free formulation |
| RT9202W | Water-based industrial coatings | High compatibility and micro-bubble control |
RT8512 Defoamer Applications and Functions
RT8512 controls foam generated during mixing and application, helping improve surface smoothness and reduce coating defects.
RT8512 provides stable foam suppression in industrial coating formulations containing surfactants and various additives.
RT8512 helps maintain formulation stability by reducing foam generated during production and processing.
RT8512 helps control bubbles during ink preparation and circulation, supporting consistent printing performance.
Packaging and Storage
There are two standard drum sizes: 25kg and 180kg. We can also provide customized packaging options.
Store in a cool and dry place with the package sealed, keep the temperature between 5°C and 35°C, and the shelf life is 12 months.
Download the TDS or Contact Our Experts for a Customised Formulation
FAQ About RT8512 Defoamer
RT8512 defoaming agent has sustained defoaming action during the production, storage, and application stages. We recommend lab tests to work out the optimal dosage for your formulation to maximize performance.
In most water-based coating systems, RT8512 will not cause instability. However, in highly sensitive low-viscosity or clear systems, we suggest you conduct pre-testing to confirm compatibility.
RT8512 Defoamer agent will not cause oil separation during drying if properly used. Overdosing or insufficient dispersion may cause defects, we will help you to apply our product in the correct manner.
Usually direct addition is fine. Add it slowly under moderate stirring to improve distribution and avoid creating extra foam.
Yes. Some formulas combine RT8512 with a secondary defoamer to balance fast knockdown and final appearance.
Compare foam knockdown, foam persistence, crater risk, compatibility, and storage stability under the same test conditions.
It may respond differently depending on resin, solvent balance, and additives. A compatibility screening is recommended before final use.
Yes. It can be evaluated in high-shear processes, but performance should be confirmed under actual mixing and circulation conditions.
