|
Inspection items |
Specifications |
Results |
Appearance |
Yellow to dark violet liquid |
conform |
Assay of NCO |
7.2±0.2% |
conform |
Assay of methane |
27±1 |
conform |
Viscosity ( 20℃) |
3 mPa.s |
conform |
Solvent |
Ethyl acetate |
conform |
Flash point |
-4℃ |
conform |
Conclusion |
conform |
|
RFE polyisocyanate is a highly effective crosslinker for adhesives based on polyurethane, natural rubber and Synthesis rubber. RFE polyisocyanate is also useful for improving adhesiveness of rubber-based materials. It Can be used as crosslinker instead of Bayer’s Desmodur RFE.
Two-component adhesive must be used with the applicable period after putting in RFE.
The length of applicable period is not only related to the polymer content of adhesive, but also other relevant components ( like resin, Antioxygen, plasticizer, solvent, etc.
When close to the applicable period, usually a few hours or one working day, adhesive becomes more difficult to operate, and viscosity rises soon.
Finally, it becomes the irreversible jelly. 100 quality adhesive, Hydroxyl polyurethane ( Polyurethane account for around 20%), RFE does 4-7. Chloroprene rubber ( Rubber account for around 20%) , RFE does 4-7.
Coatings: Desmodur RFE is typically used in the production of high-performance coatings, including automotive topcoats, industrial coatings and decorative coatings. It enhances the durability, chemical resistance and weathering resistance of coatings.
Adhesive: Used to prepare polyurethane adhesive, which has strong adhesion and flexibility and is suitable for various substrates.
Elastomers: Desmodur RFE is also used in the production of polyurethane elastomers, which are valued for their excellent mechanical properties, wear resistance and flexibility.
Sealant: It can be added to sealant formula to improve adhesion and durability.
Package: 0.75kg/bottle, total 20 bottles in one carton box, 55 kg/drum or 180kg/barrel, OR according customers request.- Storage in original sealed Covestro container. - Recommended storage temperature: 10 - 30 °C. - Protect from moisture, heat and foreign material. General information: During transportation and storage at low temperatures, crystalline deposits may form. These redissolve at room temperature. The product is highly sensitive to moisture and react with water to form carbon dioxide and insoluble ureas. The containers must therefore be kept tightly sealed. The ingress of water in any form (damp containers, anhydrous solvents, moist air) must be prevented as otherwise the formation of carbon dioxide may cause a dangerous in-crease in pressure in the containers. Exposure to air and/or light intensifies discoloration but this has no effect on the processing properties in general.
When transporting Desmodur RFE, specific precautions must be followed as it is classified as an isocyanate and may present health and safety risks. Here are some important considerations to take into account during transportation:
Regulatory Compliance: Ensure compliance with local, national and international regulations regarding the transport of dangerous goods. This includes proper labeling, documentation and compliance with transport regulations (e.g., UN number, hazard classification).
Packaging: Use appropriate containers that are compatible with isocyanates. Make sure the packaging is secure and leak-proof to prevent spillage during transportation.
Personal Protective Equipment (PPE): Personnel involved in handling and transporting Desmodur RFE should wear appropriate PPE including gloves, goggles and respiratory protection to minimize exposure.
Ventilation: Ensure that the transport vehicle is well ventilated to prevent the accumulation of vapors, which can be harmful if inhaled.
Temperature Control: Maintain proper temperature conditions during transportation, as extreme temperatures can affect the stability of the product.
Emergency Procedures: In case of spills or leaks, have emergency response procedures in place. This includes having a spill kit and first aid supplies ready.
Training: Ensure that all personnel involved in the transportation process are trained in handling hazardous materials and are aware of the risks associated with isocyanates.
Avoid incompatible materials: Keep Desmodur RFE away from incompatible materials such as strong acids, strong bases and water to prevent hazardous reactions.