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Methylene diphenyl diisocyanate

4,4'-Diphenylmethane Diisocyanate; Benzene, 1,1'-Methylenebis(4-isocyanato-); MDI; Methylenebis(4-phenyl isocyanate)

CAS 101-68-8

Chemical Formula C₁₅H₁₀N₂O₂

Molecular Weight 250.25 g/mol

Methylene diphenyl diisocyanate (MDI) is an essential chemical used primarily in the production of polyurethanes, which are found in foams, coatings, adhesives, and elastomers. It is a highly reactive diisocyanate, making it a key ingredient in rigid and flexible polyurethane applications. MDI is known for its strong bonding properties, chemical resistance, and structural stability.

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Industrial Uses

1. Polymers & Resins

Monomers for Polymer & Resin Synthesis: Methylene diphenyl diisocyanate is predominantly employed in manufacturing both rigid and flexible polyurethane foams. Rigid foams are essential for thermal insulation in appliances like refrigerators and buildings, while flexible foams are used in furniture and automotive seating.
Adhesion Promoters & Surface Modifiers: Methylene diphenyl diisocyanate based binders are utilized in composite wood products, such as particleboard and oriented strand board (OSB), enhancing structural integrity and moisture resistance.
Polymer Initiators & Catalysts: In SPF applications, Methylene diphenyl diisocyanate acts as a reactive component that, when combined with polyols, rapidly expands and solidifies, providing insulation and air-sealing properties in construction.

2. Pharmaceuticals

Drug Delivery Systems: Methylene diisocyanate derived polyurethane materials are explored in pharmaceutical applications for controlled drug release and medical implants.
Medical Adhesives & Sealants: Certain polyurethane-based medical adhesives use Methylene diisocyanate for biocompatibility and strong bonding in surgical and wound-care applications.

3. Personal Care

Packaging Materials: Methylene diisocyanate based polyurethane foams and coatings are used in cosmetic packaging to enhance durability and resistance to external factors.
Fragrance Encapsulation: Polyurethane microcapsules derived from Methylene diisocyanate are used to encapsulate fragrances in long-lasting cosmetic and personal care products.

4. Agrochemicals

Agricultural Coatings: Methylene diisocyanate based polyurethane coatings are applied to fertilizers and seeds to control nutrient release and enhance crop yield.
Insulation for Storage Facilities: Rigid polyurethane foam derived from Methylene diisocyanate is used for thermal insulation in agricultural storage buildings and silos.

Specifications

Assay	≥ 99%
Appearance	White to pale yellow solid
Odor	Slightly musty odor
Boiling Point	392°C (738°F)
Melting Point	37-40°C (98°F - 104°F)
Density	1.19 g/cm³
Solubility	Insoluble in water, soluble in organic solvents
Viscosity	150-250 mPa·s at 25°C
Flash Point	198°C (388°F)

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FAQs

1. What is the current price of Methylene diphenyl diisocyanate in India ?
The price of Methylene diphenyl diisocyanate can vary based on factors such as purity, quantity, etc. For the most accurate and competitive pricing, please contact us at +91.979 979 2121 directly for a customized quote tailored to your needs.

2. Where can I buy Methylene diphenyl diisocyanate in India ?
You can purchase Methylene diphenyl diisocyanate from MULTICHEM, a leading importer with a reputation for quality and reliability. We provide convenient options for bulk orders and direct shipments across India. For more details on how to place an order, please visit our website or contact our sales team.

3. What is the minimum order quantity (MOQ) for Methylene diphenyl diisocyanate ?
Our minimum order quantity (MOQ) for Methylene diphenyl diisocyanate designed to cater to both small-scale and large-scale needs. The MOQ depends on the packing size of the product which could range from 25 kg to 250kg.

4. How can I ensure the quality of Methylene diphenyl diisocyanate supplied by Multichem ?
We adhere to stringent quality control processes to ensure that our products meet the highest standards of purity and effectiveness. They undergo rigorous testing and quality checks to guarantee that they comply with industry specifications. We provide a Certificate of Analysis (CoA) with every shipment to ensure transparency and quality assurance.