PRIMID-based Powder Coatings
We are a manufacturer based in China. We specialize in providing high-quality PRIMID-based Powder Coatings for industrial clients across various sectors. Whether you need chemicals consultation or technical support, our team is here to help.
Category：Paint chemicals Own Brand：MT /MOQ:100KG /From China/ B2B only.
Introduction
Features:
Great adhesion and mechanical properties;
Smooth coating layers with high gloss;
Chemical and weather resistance;
Great Storage stability
PRIMID-Based Powder Coatings: Technology Overview
PRIMID (β-hydroxyalkylamide) crosslinkers are widely used in polyester powder coatings as an eco-friendly alternative to TGIC. Key features are summarized below:
1. Basic Properties
| Parameter | PRIMID-Based Coating |
|---|---|
| Crosslinker Type | β-hydroxyalkylamide (e.g., PRIMID XL-552. QM-1260) |
| Resin Compatibility | Carboxyl-functional polyesters |
| Curing Mechanism | Hydroxyl-carboxyl esterification |
| Curing Conditions | 160-200°C (320-392°F) for 10-15 min |
| Catalyst Requirement | Optional (phosphonium salts accelerate cure) |
2. Performance Characteristics
| Property | Performance Level |
|---|---|
| Weather Resistance | Excellent (5-8 years outdoor durability) |
| Chemical Resistance | Good (resists mild acids/alkalis) |
| Mechanical Properties | Pencil hardness: H-2H; Impact resistance: 80-100 in-lb |
| Film Appearance | Smooth, low orange peel |
| Gloss Retention | >80% after 2000h QUV exposure |
3. Advantages vs. TGIC Systems
| Feature | PRIMID-Based | TGIC-Based |
|---|---|---|
| Toxicity | Non-toxic, non-mutagenic | Suspected mutagen |
| Curing Temperature | 10-20°C lower | Higher (180-200°C) |
| Regulatory Status | REACH-compliant | EU-restricted |
| Film Flexibility | Better | Good |
4. Typical Applications
| Market Segment | Specific Uses |
|---|---|
| Architectural | Window profiles, façade panels |
| Automotive | Trim parts, alloy wheels |
| General Industry | Shelving, electrical cabinets |
| Furniture | Outdoor tables, garden fixtures |
5. Formulation Guidelines
| Component | Typical Content (wt%) |
|---|---|
| Polyester Resin | 50-70% |
| PRIMID Crosslinker | 3-8% |
| Titanium Dioxide | 15-25% |
| Flow Additives | 1-2% |
| Catalysts | 0-0.5% |
6. Limitations
| Issue | Mitigation Strategy |
|---|---|
| Moisture Sensitivity | Use sealed packaging, dry storage |
| Limited Overbake Resistance | Optimize cure schedule |
| Higher Cost vs. TGIC | Offset by regulatory compliance benefits |
Conclusion
PRIMID-based powder coatings provide a safer, more sustainable option with excellent weatherability. While slightly costlier than TGIC systems, their regulatory acceptance and lower curing temperatures make them ideal for architectural and general industrial applications.
If you're ready to take the next step, Leave your message below and we’ll reply soon. 20+ years of chemical manufacturing & export experience, a partner you can trust.
Inquiry
Factory & Shipment
