Introduction
Methylene diphenyl isocyanate (MDI) is an essential raw material used primarily to manufacture polyurethane foam used in a variety of products and industrial applications. Polymeric MDI is a technical grade mixture of diphenylmethane-4,4′-diisocyanate with isomer and homologues of higher functionality. It is used in system with polyols to produce rigid polyurethanes foam,and also in semi-rigid foam ,CASE application.
Manufacturers in the world
- WANHUA ( PM200 ) ,biggest manufacturer in the world
- BASF ( M20S ) , having factory in China
- Convestro ( 44V20L ) ,having factory in China
- Huntsman ( 5005 ) , having factory in China
- Dow ( PAPI 27 )
- Tosoh ( MR200 ) ,having factory in China
- KMCI ( M-200 )
Key Benefits of Polymeric MDI:
• Superior Bonding Strength: Polymeric MDI creates a strong bond between chip foam particles, resulting in a more durable and cohesive final product.
• Improved Moisture Resistance: Polymeric MDI enhances the moisture resistance of chip foam, preventing degradation and extending product lifespan.
• Streamlined Production: Polymeric MDI often allows for faster curing times, leading to increased production efficiency.
• Reduced VOC Emissions: Some Polymeric MDI options boast lower VOC (volatile organic compound) emissions, contributing to a more environmentally friendly production process.
Application
Construction
MDI is used in the production of insulation materials, such as rigid foam insulation for buildings and appliances, as well as in coatings and adhesives for construction applications.
Automotive
MDI is used in the production of flexible foam for car seats, as well as in elastomers for automotive parts such as seals, hoses, and bushings.
Furniture
MDI is used in the production of flexible foam for furniture and bedding products, as well as in coatings and adhesives.
Electronics
MDI is used in the production of coatings, adhesives, and sealants for electronic applications.
Packaging
MDI is used in the production of coatings and adhesives for packaging applications.
Coatings
MDI is used in the production of coatings and sealants for industrial and consumer applications.
Polyurea
MDI is also used in the production of polyurea, which is a type of polymer that can be used for coatings, linings, and sealants.
Adhesives
MDI is used in the production of adhesives for industrial and consumer applications.
| Production |
Manufacture |
Viscosity (25ºC,mPa•s) |
NCO content
(%Wt) |
Density
(25ºC,g/cm3) |
| PM-200 |
WANHUA |
150-250 |
30.5-32.0 |
1.22-1.25 |
| 44V20L |
COVESTRO |
150~250 |
30.5-32.0 |
1.22-1.25 |
| M20S |
BASF |
180-240 |
30.5-32.0 |
1.22-1.25 |
| 5005 |
HUNTSMAN |
180-240 |
30.5-31.5 |
1.22-1.25 |
| MR-200 |
NPU |
166 |
30.8 |
1.22-1.24 |
| M200 |
KUMHO MITSUI |
150-230 |
30.0-32.0 |
1.23-1.25 |
| 135C |
DOW |
150-220 |
31.0 |
1.23 |
Storage:
Diphenylmethane-4,4 '- diisocyanate is packaged in nitrogen sealed galvanized iron drums. Store in a cool, ventilated, and dry warehouse, avoiding direct sunlight. The temperature in the warehouse should be below 15 ºC, preferably below 5 ºC, and products should be used as early as possible. Stay away from sources of fire and heat. Long term storage, the storage temperature should not exceed 20 ºC. Strictly waterproof and moisture-proof, store and transport according to toxic chemical regulations.
Transportation:
- Shipping Containers: 20-foot or 40-foot containers for international shipments.
- Truck Transport: Securely loaded trucks for domestic transportation.
- Rail Transport: Bulk bags or sealed containers loaded onto rail cars.
Handling Precautions:
- Avoid Moisture: Keep PVC resin dry to maintain quality.
- Secure Loading: Ensure bags and containers are fastened to prevent shifting.
- Temperature Control: Avoid extreme temperatures.
- Safe Handling: Use proper equipment to prevent spillage.
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