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[Chemical Knowledge]：Specification for storage and transport of polymeric MDI

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Polymeric MDI (diphenylmethane diisocyanate) is an important raw material for chemical production, which is widely used in polyurethane foam, coatings, elastomers and other fields. Due to its special chemical properties, polymeric MDI needs to strictly comply with certain safety regulations during storage and transportation to ensure the safety of personnel and the environment. In this paper, the specification of safe storage and transportation of aggregate MDI will be introduced in detail.

1. the physical and chemical properties of polymeric MDI

polymeric MDI is a colorless or slightly yellow transparent liquid with a strong pungent odor. It is easy to react with water, alcohol, ether and other solvents to generate water-insoluble polyurea compounds. The vapors of polymerized MDI have a strong irritating effect on the eyes, skin and respiratory tract, which can cause severe chemical pneumonia and pulmonary edema.

2. safety storage specifications for polymerized MDI

1. Storage facilities: polymerized MDI should be stored in a cool, dry, well-ventilated dedicated warehouse, away from fire, heat and direct sunlight. The warehouse floor shall be smooth and non-slip, and equipped with corresponding fire-fighting equipment and leakage emergency treatment equipment.
2. Storage container: polymeric MDI should be stored in a special stainless steel or PTFE container, and it is strictly prohibited to use iron, aluminum and other metal containers. The container should be well sealed to prevent leakage.
3. Storage limit: According to the safety production requirements of the enterprise and national laws and regulations, the storage limit of the warehouse is reasonably set to ensure that in the event of an accident, effective measures can be taken quickly for disposal.

3. polymerization of MDI safety transport specification

1. transport vehicles: should use special chemical transport vehicles for polymerization of MDI transport, vehicles should have good sealing, anti-static and anti-collision performance.
2. Transport packaging: Polymeric MDI should be packed in special stainless steel or PTFE containers, and the containers should be tightly sealed to prevent leakage. Each packaging container should have a clear label, indicating the name of the item, danger and emergency measures and other information.
3. Transportation routes: safe transportation routes should be selected to avoid passing through sensitive areas such as densely populated areas and water source protection areas. During transportation, you should abide by traffic rules, keep the speed stable, and avoid operations such as sudden braking and sharp turns.

4. Polymeric MDI Leakage Emergency Treatment Measures

1. Personnel protection: When dealing with the leakage of polymeric MDI, you should wear professional protective clothing, gloves, goggles and other personal protective equipment to avoid direct contact with the leakage.
2. Cut off the fire source: immediately cut off all fire sources in the leakage area to prevent fire and explosion accidents.
3. Leakage treatment: Use special adsorption materials to adsorb the leakage, and place the adsorbed materials in a closed container and treat them as hazardous waste.
4. Environmental cleaning: Clean up the leakage area to ensure that it will not pollute the environment.

In short, polymeric MDI, as an important raw material for chemical production, requires strict compliance with safety regulations during storage and transportation to ensure the safety of personnel and the environment. Enterprises should establish a sound safety management system and operating procedures, strengthen the safety training and education of employees, improve the safety awareness and operational skills of employees, and ensure the safe and smooth storage and transportation of aggregated MDI.

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