Isocyanate curing agents react with hydroxyl groups in coatings or polymers to form a robust crosslinked network, significantly enhancing the mechanical strength, chemical resistance, and weatherability of the material, thereby improving its overall durability.
Isocyanates have a high level of reactivity and can react with compounds containing active hydrogen (such as alcohols, amines, water, etc.) to form products like ureas and urethanes. This characteristic makes isocyanates one of the essential raw materials for the production of polyurethane materials.
Isocyanates are somewhat toxic and can irritate the eyes, skin, and respiratory system. Prolonged or high-concentration exposure may lead to allergies or other health issues. Therefore, appropriate safety precautions must be taken during use, such as wearing personal protective equipment and ensuring good ventilation. In addition, waste isocyanate products and packaging should be properly disposed of according to relevant regulations to minimize environmental impact.
Isocyanates can easily react with moisture in the air, so during storage and transportation, it is necessary to maintain a sealed environment to avoid contact with moisture, high temperatures, and direct sunlight to prevent deterioration. In summary, isocyanate curing agents are very important chemical raw materials, but at the same time, their safe use and environmental protection issues need to be taken into account.
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