Polyurethane waterproof coating A STD-939
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whats/app：+86 132 6275 2056
WEB: std-coatings.com
Product Description
The polyurethane prepolymer has a high resin content with excellent ratio of NCO, which can form a highly dense and elastic waterproof membrane after being cured and shaped by the curing agent.Our company’s several types of polyurethane prepolymer, with our corresponding curing agent, can reach different levels of waterproof membrane.The mixture is easy to apply, and can be applied by roller application or spray application according to the requriement of the project.
Usage
After mixing the polyurethane prepolymer with its corresponding curing component in the recommended ratio and ensuring thorough stirring,apply it using roller coating or spray coating methods.
parameter
| Item | 979-A | 939-A | 911C-A | 911D-A |
| NCO content (%,±1) | 4.7 | 6.7 | 3.3 | 4.5 |
| Appearance | Colorless or pale yellow liquid | |||
| Viscosity (23 ± 2 ℃, mPa. s) | 6000-10000 | 5000-8000 | 700-1200 | 4200-4800 |
| The physical properties of the membrane formed after mixing the polyurethane prepolymer with the STD compatible curing component. | ||||
| STD curing component | 979-B | 939-B | 911C-B | 911D-B |
| Weight ratio(A:B) | 1:01 | 1:02 | 1:03 | 1:04 |
| Solid content (%) | 98 | 98 | 92 | 92 |
| Tensile Strength (MPa) | 3.5 | 6 | 2 | 2 |
| Elongation at Break (%) | 450 | 450 | 500 | 500 |
| Tear Strength (N/mm) | 25 | 35 | 15 | 15 |
| Impermeability | 0.4MPa, 2h | 0.4MPa, 2h | 0.6MPa, 2h | 0.6MPa, 2h |
| Bonding Strength (MPa) | 2.5 | 2.5 | 1 | 1 |
| Note: The physical property data mentioned above are solely based on tests conducted on samples of the membrane formed after mixing the polyurethane prepolymer with the STD compatible curing component and do not represent the physical properties of the polyurethane prepolymer itself. | ||||
Product Features
Scientific configuration: High resin content with scientific ratio of NCO, ensuring excellent performance and durability.
High density and elasticity: The forming waterproof membrane that is highly dense and elastic, providing superior protection against water infiltration.
Easy application: The mixture of the polyurethane prepolymer and curing agent is supporting roller or spray application methods for convenient application on different surfaces.
Durable and reliable: The waterproof film formed by the polyurethane prepolymer is durable and reliable, providing long-lasting protection against water damage and leakage.
Packaging
20kg/pail, 200kg/drum
Shelf life
12 months
Storage and Transportation
Storage: Store the polyurethane prepolymer in a dry, cool, and well-ventilated environment, avoiding direct sunlight and exposure to extreme temperatures. The storage temperature is typically between 15°C and 25°C. Additionally, avoid contact with water, acids, bases, and other harmful substances.
Secure Stacking: Stack the buckets or drums securely to prevent them from falling or rolling. Use appropriate securing devices like straps or brackets to ensure stability during transport.
Leak Prevention: Ensure that the buckets or drums are tightly sealed to prevent any leaks. Leaks can lead to environmental pollution, safety hazards, and loss of product.
Secure Loading: When loading the buckets or drums onto the transport vehicle, ensure that they are properly secured and distributed evenly to avoid any imbalance or overloading.
Emergency Preparedness: Have an emergency response plan ready, including contact information for emergency services and procedures to follow in case of leaks, spills, or accidents.
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