Description

4,4'-Methylenebis(2-Chlorophenyl Isocyanate) is a specialized aromatic diisocyanate monomer, a key building block in the synthesis of high-performance polymers. Its value lies in its ability to impart enhanced chemical resistance, thermal stability, and mechanical strength to the resulting polyurethane and polyurea materials. This compound is essential for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to develop products for demanding applications.

Application

• High-Performance Polyurethane Coatings: Used as a curing agent for industrial, marine, and protective coatings requiring exceptional durability and chemical resistance.
• Specialty Elastomers: Serves as a key monomer in the production of cast, spray, and millable polyurethane/polyurea elastomers for rollers, seals, and linings.
• Adhesives and Sealants: A critical component in formulating structural and high-strength bonding agents for automotive, aerospace, and construction applications.
• Composite Materials: Used in the resin matrix for fiber-reinforced composites, enhancing interlaminar shear strength and environmental resistance.
• Waterproofing Membranes: Integral to spray-applied polyurea membranes for roofing, containment, and infrastructure protection.
• Automotive Components: Employed in the manufacture of underbody coatings, truck bed liners, and other parts requiring abrasion and impact resistance.

Basic Information

Product Name	4,4'-Methylenebis(2-Chlorophenyl Isocyanate)
CAS No.	20513-43-3
Molecular Formula	C15H10Cl2N2O2
Molecular Weight	321.16 g/mol
Synonyms	2,2'-Dichloro-4,4'-methylenediphenyl diisocyanate; Methylene bis(2-chloroaniline) diisocyanate; 2,2'-Dichloro-4,4'-diisocyanatodiphenylmethane; 4,4'-Diisocyanato-2,2'-dichlorodiphenylmethane; MBOCA diisocyanate; Methylene bis(2-chlorophenyl isocyanate); 2,2'-Dichloro-MDI; 4,4'-Methylenebis(2-chlorophenyl isocyanate)
EINECS	243-887-8

Quality Control

Our production of 4,4'-Methylenebis(2-Chlorophenyl Isocyanate) adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including assay, isomer content, and impurity profiling, to ensure consistency and performance. Certificates of Analysis (COA) detailing all specifications are provided with each shipment to guarantee traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15°C and 25°C (59°F and 77°F). This product is hygroscopic (moisture-sensitive) and must be kept under a dry inert atmosphere (e.g., nitrogen or argon) to prevent reaction with atmospheric moisture. Keep away from heat, sparks, open flames, and incompatible materials such as alcohols, amines, and strong bases.

Specification

Item	Specification
Appearance	White to pale yellow crystalline solid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.5%
Isomer Content (4,4'-)	≥ 97.0%
Hydrolyzable Chlorine	≤ 0.1%
Melting Point	95°C - 105°C
Acidity (as HCl)	≤ 0.05%

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