ASTRA PA®
Adhesion Promoters
Specialized additives to enhance adhesion strength between surfaces (metals, plastics, glass, composites). Modify surface, improve wettability and chemical compatibility.
Why use adhesion promoters?
Adhesion promoters enhance the bond between coatings and difficult substrates: plastics, metals, glass, composites. They modify surface energy and create chemical bridges for lasting adhesion.
Key Benefits
- Stronger bond to difficult substrates
- Works on plastics, metals, glass, composites
- Improved water and humidity resistance
- Better salt spray performance
- Reduced delamination risk
- Available for solvent and waterborne systems
Impact on Coating Performance
ASTRA PA adhesion promoters solve the most challenging substrate adhesion problems. Essential for coatings on polypropylene, stainless steel, glass and other low-energy surfaces.
P – organosoluble, WB – water-based, RC – radiation-curable
Product Catalog
Download TDS| Active % | Feature | TDS | Samples | |||
|---|---|---|---|---|---|---|
| ASTRA PA-1808 | Water-born ASTRA-PA1708 | Water-based | 30% | Chlorinated polyolefin significantly increases the adhesion of paintwork to substrates based on polyolefins (especially polypropylene). Increases moisture resistance, resistance to salt fog. |
Articles about ASTRA PA®
Custom Additive Formulation: Vet Four Chemistry Classes Before Scale Up
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Coating Additives: Avoid Prop 65 60 Day Notices, Test Powder Exposure
Proposition 65 applies to coating additives when their handling, processing, or end use creates exposure above OEHHA Safe Harbor levels, not merely because a listed substance appears somewhere in the formulation. Formulators should treat exposure assessment, not chemical presence alone, as the operative test. The first practical step is to check the raw material against the current OEHHA list and map how the additive is likely to be encountered by workers or end users, prioritizing inhalation pathways before anything else.
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Formulators: 3 QC Metrics to Qualify a Coating Additive Producer
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