Polyester leveling agent 4358
Category：Coating Additives
Introduction
Polyester Leveling Agent 4358: Technical Overview
Polyester leveling agent 4358 is a specialized additive designed to improve film formation and surface smoothness in powder coatings. Below is a structured technical summary:
1. Key Characteristics
| Property | Specification |
|---|---|
| Chemical Type | Polymeric surface-active agent |
| Appearance | White to off-white powder |
| Compatibility | Polyester, hybrid, and epoxy powder coatings |
| Recommended Dosage | 0.5–2.0% of total formulation weight |
| Function | Reduces surface tension, eliminates defects |
2. Performance Benefits
| Benefit | Description |
|---|---|
| Improved Flow | Minimizes orange peel and cratering |
| Enhanced Substrate Wetting | Promotes uniform coating adhesion |
| Defect Reduction | Prevents pinholes and fisheyes |
| Gloss Enhancement | Increases surface smoothness and reflectivity |
3. Comparison with Standard Leveling Agents
| Feature | Polyester Leveling Agent 4358 | Generic Acrylic Leveler |
|---|---|---|
| Compatibility | Optimized for polyester resins | Broad but less effective |
| Thermal Stability | Stable up to 250°C (482°F) | Degrades above 200°C (392°F) |
| Gloss Impact | Higher gloss retention | Moderate improvement |
4. Application Guidelines
| Coating Type | Recommended Dosage | Key Considerations |
|---|---|---|
| Polyester Coatings | 1.0–1.5% | Ideal for high-gloss finishes |
| Hybrid Coatings | 0.5–1.0% | Prevents flow separation |
| Epoxy Coatings | 0.8–1.2% | Use with low-BPA systems |
5. Formulation Integration
| Step | Instructions |
|---|---|
| Premixing | Blend evenly with base resin before extrusion |
| Extrusion | Process at 90–110°C (194–230°F) |
| Curing | Compatible with standard curing cycles |
6. Limitations & Solutions
| Challenge | Mitigation Strategy |
|---|---|
| Overuse Hazards | Limit to ≤2% to avoid excessive flow |
| Storage Sensitivity | Store in dry conditions to prevent clumping |
| Cost Impact | Optimize dosage for cost-performance balance |
Conclusion
Polyester leveling agent 4358 significantly enhances coating aesthetics and functionality, particularly in polyester-based systems. Its targeted performance and thermal stability make it a preferred choice for high-quality finishes in architectural, automotive, and industrial applications.
product presentation:
4358 Can be used in solvent type, solvent-free polyester type leveling agent. Suitable for paint, ink, adhesive system, without silicone, can reduce the surface tension and improve the flow,smoothness.
chemical composition
Polyester-type high polymer polymer
Typical materialized data
surface:Light yellow liquid
%density of active:50%
ingredient s g /cm ²: About 1.0
dissolvant:xylene
product features
1. Excellent flow and smoothness.
2, has good compatibility with most resins, especially the polar system.
3. Improve the material wettability of the substrate. application area This agent is recommended for all solvent-based, solvent-free
coatings, printing inks and covering oil.
Recommended addition quantity ( calculated by supply form )
0.05-0.3% dosage (supplied form) can be added up to 1% based on the total formulation UV system. The above recommended amount is for reference only, and the optimal amount should be determined through a series of tests.
usage method
The aid can be added at any production stage, including post-addition.
safe operation
1. Avoid direct contact with the skin.
2. If you accidentally contact the skin, please immediately rinse the skin with soapy water and rinse with water.
Factory & Shipment
