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Wholesale 3A Activated Powder in Polyurethane Floor Glue
Table of Contents
Customer Background
A high-end building materials company faced issues like curing bubbles and uneven adhesive strength in its two-component polyurethane floor glue. The cause was trace moisture (300–500 ppm) reacting with isocyanates, generating CO₂ bubbles. To address this, the company used 3A activated powder for efficient dehydration—successfully resolving the problem.
Key Advantages of 3A Molecular Sieve Powder
- Precise Dehydration:
- 3Å pore size targets water (2.8Å) without affecting polyether polyols
- Reduces polyol moisture from 500 ppm to <50 ppm
- Chemically Inert:
- No reaction with raw materials, no by-products
- Neutral pH (6.5–7.5), stable curing environment
- Excellent Dispersibility:
- Ultrafine 5–20μm particles distribute evenly
- Static water absorption ≥22% (25°C, RH 50%)
Application Method
- Pretreatment:
Add 3% 3A activated powder to polyol, stir at 60°C for 30 min, then filter or use directly.
- Results Comparison:
Indicator Untreated 3A Treated
Curing Bubbles Present None
Tensile Strength 8 MPa 12 MPa
Curing Time 6 hrs 4 hrs
Storage Stability 3 months 12 months
Implementation Results
- Quality Boost:
- No curing bubbles, surface flatness ≤0.2 mm/2 m
- 50% increase in adhesion strength, meets EN 13813
- Cost Savings:
- Replaces costly dehydration like molecular distillation
- Only 3% addition, saving ¥800,000 annually
- Environmental Compliance:
- No solvent use, 30% VOC reduction
- Meets GB 18583-2008 standards
Broader Applications
Ideal for:
- Polyurethane sealants & structural adhesives
- Epoxy resin systems
- Other moisture-sensitive polymers
Technical Notes
- Powder must be well-activated (250°C × 2h)
- Best used with vacuum degassing
- Test system volume changes after addition
Conclusion
3A molecular sieve activated powder offers an effective, economical, and eco-friendly solution to moisture challenges in polyurethane systems—delivering better product performance and significant cost reduction.