Development of Long-Pot-Life Polyaspartic Resins

Background of the study

Polyaspartic polyurea material has been widely used as a third generation polyurea technology with its rapid curing, excellence and environmental advantages. However, the traditional polyaspartic polyurea resin pot life is short (usually 30-60 minutes) and there is a problem of inadequate operating time in large areas of construction and complex conditions.

In response to this technological bottleneck, the Junaimei Research and Development Centre has successfully developed super-long, pot life breakthrough 120 minutes.

II. TECHNICAL PROGRAMME

2.1 Molecular Structure Design

• Select high molecular mass polyether as the starting material
• Introduction of a chain structure and increased space-level resistance to membrane
• Optimizing ester structures and regulating electron cloud density

2.2 Catalyst System

• Use latent catalysts to maintain low activity in the initial mix
• The catalyst gradually releases activity over time.
• Ensure that final curing performance is not compromised

Performance test results

3.1 construction performance

• pot life ：120 Minutes (25℃)
• Touch-dry time:45 Minutes (25℃)
• Hard-dry time:6 hours (25℃)
• Construction temperature:-10℃ ~ +50℃

3.2 Mechanical Performance

• tensile strength ：≥20MPa
• elongation at break ：≥200%
• adhesion ：≥10MPa (steel base)

3.3 corrosive properties

• salt-spray resistance ：4000 hour without rust
• Acid resistance:No abnormalities after immersion in 10% H₂SO₄ for 60 days
• Resilient:10% Naoh impregnated 60 day-by-day

IV. Application advantages

• Suitable for extensive and continuous construction to avoid scratches
• More time is available for complex structural construction to process details
• Sufficient Lovering Time, smoother coated surface
• Reduce material waste and increase material utilization

V. Product type

• C1520：Pot life 90-120 minutes for corrosion protection, flooring
• C1524：Pot life 60-90 minutes for waterproof, corrosion protection
• C1330：Pot life 45-60 minutes, low viscosity
• C2850：Pot life 90-120 minutes, super low viscosity

Concluding remarks

The successful development of Junaimei ' s super-long pot life polyaspartic polyurea resin has addressed the short technical bottlenecks of traditional polyaspartic polyurea materials pot life, providing better solutions for large areas of construction and complex conditions.