Single-Component Polyurea Waterproof Coating

Description

• Solid content: 80 %
• Surface drying time: 2 h
• Actual drying time: 4 h
• Tensile properties:
• Tensile strength: 25 MPa
• Elongation at break: 340 %
• Tear strength: 70 N/m
• Low temperature bending: –45 °C, no cracking
• Water permeability: 0.3 MPa, 120 min, no water penetration
• Heat treatment rate: 0.5 %
• Water absorption: 1.4 %
• Shore hardness (A): 80
• Wear resistance (750 g / 500 r): 12 mg
• Impact resistance: 2.0 kg·m
• Adhesive strength: > 3.2 MPa (substrate failure)
• Peel adhesive strength at 180 °C: 5 MPa

After heat treatment at 80 °C for 7 days:
• Tensile strength retention: 84 %
• Elongation at break: 440 %
• Low temperature bending: –40 °C, no cracking

After acid treatment in 2 % H₂SO₄ solution for 7 days:
• Tensile strength retention: 81 %
• Elongation at break: 340 %
• Low temperature bending: –40 °C, no cracking

After alkali treatment in 0.1 % NaOH + saturated Ca(OH)₂ solution for 7 days:
• Tensile strength retention: 85 %
• Elongation at break: 370 %
• Low temperature bending: –40 °C, no cracking

After salt treatment in 3 % NaCl solution for 7 days:
• Tensile strength retention: 70 %
• Elongation at break: 390 %
• Low temperature bending: –40 °C, no cracking

After artificial climate aging (cumulative radiation 5040 kJ/m² at 340 nm):
• Appearance: no cracking
• Tensile strength retention: 80 %
• Elongation at break: 280 %
• Low temperature bending: –40 °C, no cracking