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| OEM | OEM Services Provided |
| Feature | Good stability |
| Classification | Paint Additives |
| Advantage | Professional, Fast Delivery, Customizable | Samples | Apply for free，Contact Export Director now ↓ |
Performance Features
Adhesion to PP plastic, water resistance
Main Applications
Primer on PP
plastics
Table 1: Key Resin Types for PP Coatings
| Resin Type | Chemical Base | Adhesion to PP | Flexibility | Cure Mechanism |
|---|---|---|---|---|
| Chlorinated Polyolefin (CPO) | Chlorinated PP | Excellent | High | Physical drying |
| Modified Acrylic | Acrylic copolymer | Good | Medium | Thermoset/UV cure |
| Polyurethane | Hybrid PU-PP | Very Good | High | 2K moisture cure |
| Maleic Anhydride Grafted | PP-g-MAH | Excellent | Medium | Heat activation |
| Waterborne Hybrid | Acrylic-polyolefin | Good | Medium | Thermal/oxidative |
Table 2: Performance Comparison
| Property | CPO | Modified Acrylic | Polyurethane | PP-g-MAH |
|---|---|---|---|---|
| Adhesion (ASTM D3359) | 5B | 4B | 4B | 5B |
| Flexibility (T-bend) | 0T | 2T | 0T | 1T |
| Chemical Resistance | Good | Excellent | Very Good | Good |
| UV Stability | Fair | Excellent | Good | Fair |
| Cost Index | 1.0 | 1.5 | 2.0 | 1.2 |
Table 3: Application Methods
| Process | Resin Suitability | Dry Film Thickness | Cure Condition |
|---|---|---|---|
| Spray Coating | All types | 15-30μm | 60-80°C/10-20min |
| Dip Coating | Waterborne hybrids | 10-25μm | RT-60°C/15-30min |
| Roll Coating | CPO, Acrylic | 8-20μm | 70-90°C/5-15min |
| UV Cure | Modified acrylic | 10-15μm | 300-500mJ/cm² |
Table 4: Formulation Components
| Component | Function | Content Range (%) |
|---|---|---|
| Base Resin | Adhesion promoter | 40-60 |
| Crosslinker | Cure agent | 5-15 (for thermosets) |
| Solvents | Viscosity control | 20-40 (solventborne) |
| Additives | Flow/leveling | 0.5-2 |
| Pigments | Color/opacity | 5-25 |
Table 5: Coating Performance Standards
| Test | Method | Typical Requirement |
|---|---|---|
| Crosshatch Adhesion | ASTM D3359 | ≥4B |
| MEK Resistance | ASTM D5402 | ≥100 double rubs |
| Impact Resistance | ASTM D2794 | ≥50kg·cm |
| Humidity Resistance | ASTM D4585 | 500h no blistering |
| Abrasion Resistance | ASTM D4060 | ≤50mg/1000 cycles |
PP plastic coatings require specialized resin systems to overcome the low surface energy of polypropylene. Chlorinated polyolefins remain the benchmark for adhesion, while newer hybrid technologies offer environmental compliance and multi-substrate capabilities. Proper surface pretreatment remains critical for all coating systems.
Declaration: The products displayed on this website are intended exclusively for industrial applications or scientific research. They are not intended for medical, pharmaceutical, or food use. In accordance with applicable laws and regulations, purchasing organizations must hold valid qualifications and approvals.
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