Description

Methylenebis(p-Phenyl Isocyanate) is a key aromatic diisocyanate monomer used in the synthesis of high-performance polymers. This compound is essential for creating polyurethane and polyurea materials with superior mechanical strength, chemical resistance, and thermal stability. It is primarily sought after by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for advanced composite materials.

Application

• Polyurethane Elastomers: Used as a hard segment component to produce durable, abrasion-resistant elastomers for industrial wheels, rollers, and machinery parts.
• High-Performance Coatings: A critical raw material for formulating chemical and corrosion-resistant industrial and protective coatings.
• Adhesives & Sealants: Serves as a cross-linking agent to enhance the bond strength, flexibility, and environmental durability of structural adhesives and sealants.
• Polyurea Spray Systems: A key reactant in fast-curing polyurea formulations used for waterproofing, tank linings, and protective industrial liners.
• Composite Materials: Used in the production of fiber-reinforced composites for the automotive and aerospace sectors.
• Thermosetting Polymers: Employed in the synthesis of various thermoset resins requiring high thermal and dimensional stability.

Basic Information

Product Name	Methylenebis(p-Phenyl Isocyanate)
CAS No.	97568-33-7
Molecular Formula	C15H10N2O2
Molecular Weight	250.25 g/mol
Synonyms	MDI (Methylene Diphenyl Diisocyanate) Isomer; 4,4'-Methylenebis(phenyl isocyanate) Isomer; Methylene bis(4-phenylisocyanate); Bis(4-isocyanatophenyl)methane; Methylenedi-p-phenylene isocyanate; p,p'-MDI; 4,4'-Diphenylmethane diisocyanate Isomer; MBI
EINECS	Contact for details

Quality Control

Our Methylenebis(p-Phenyl Isocyanate) is manufactured under stringent process controls to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC, GC, and titration methods. Certificates of Analysis (COA) detailing purity, isomer content, and impurity profiles are provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept under a dry inert atmosphere (e.g., nitrogen) to prevent reaction with atmospheric moisture and CO2, which can lead to polymerization or gelation.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 99.0 %
Isomer Content (4,4'-MDI)	≥ 98.0 %
Hydrolyzable Chlorine	≤ 0.01 %
Acidity (as HCl)	≤ 0.01 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.