Coating Additives

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.

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