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Colored anti-skid pavement adhesive is a two-component solvent-free polyurethane adhesive used for various warning anti-skid sections of urban greenways, buses, bicycles, lanes for disabled persons, highways and municipal roads, and other various The paving of special pavements. The main agent of this adhesive is an organic compound containing hydroxyl groups, and the curing agent is an isocyanate prepolymer. The mixing ratio is 4:1 (by weight). The main agent and curing agent solidify through a chemical reaction to form a hard elastic substance, and there is no obvious change in volume before and after solidification.
| item | Parameters | ||
|---|---|---|---|
| Appearance | Component A | Component B | |
| Dark Red (Adjustable) | light brown | ||
| Viscocity (cps) | 15,000~20,000 | 150~250 | |
| Density g/cm3 | 1.35~1.45 | 1.2~1.25 | |
| Solid content | >99.9% | ||
| Bond strength Mpa | >3 with Concrete | ||
| Heat resistance | Does not open, peels off, @ 80 °C | ||
| Low temperature resistance | Does not open, peels off, @-30 °C | ||
| Aging resistance | Accelerated aging test showed no change for 72 hours, level I of powdering and level I of discoloration after 1,000 hours. | ||
Polyurethane adhesives are versatile bonding agents formulated by reacting polyols with isocyanates. This chemical reaction forms a strong polyurethane polymer network that adheres to various substrates. Polyurethane adhesives work by forming molecular bonds between the adhesive and the substrate, providing strong and durable adhesion.
Polyurethane adhesives offer several advantages, including strong bonding strength, flexibility, durability, resistance to chemicals and environmental factors, versatility, wide temperature range, and excellent mechanical properties. These properties make them suitable for a wide range of bonding applications.
Polyurethane adhesives can bond to a wide variety of substrates, including metals, plastics, wood, glass, ceramics, composites, and foams. They can also bond dissimilar materials together, making them versatile for bonding different types of surfaces.
Polyurethane adhesives can be applied using methods such as brushing, rolling, spraying, or dispensing with a caulking gun. It’s essential to follow the manufacturer’s instructions for proper surface preparation, application technique, and curing conditions to achieve optimal bonding results.
The curing time for polyurethane adhesives varies depending on factors such as temperature, humidity, substrate type, and adhesive formulation. Generally, polyurethane adhesives cure within a few hours to several days, with full cure achieved over 24 to 72 hours.
Yes, polyurethane adhesives are typically waterproof and exhibit excellent resistance to moisture. They can withstand exposure to water, humidity, and other environmental conditions without compromising their bonding performance.
Yes, polyurethane adhesives can be painted over once fully cured. However, it’s essential to ensure that the adhesive is completely cured and free of contaminants before applying paint. Some formulations may require surface preparation or priming for optimal paint adhesion.
Yes, polyurethane adhesives are suitable for outdoor applications due to their durability, weather resistance, and UV stability. They can withstand exposure to sunlight, rain, temperature fluctuations, and other environmental factors without degrading or losing adhesion.
When used according to manufacturer instructions, polyurethane adhesives are generally safe to use. However, it’s essential to follow proper handling, storage, and safety precautions to minimize exposure to uncured adhesive, which may contain potentially harmful chemicals. Adequate ventilation and personal protective equipment (PPE) should be used when handling polyurethane adhesives.
While polyurethane adhesives provide strong and durable bonds, they can be removed using mechanical methods such as sanding, scraping, or heat application. Chemical solvents or adhesive removers may also be used, but it’s essential to test them on a small, inconspicuous area first to ensure compatibility with the substrate and to follow safety precautions.