Description

1-Isocyanato-4-[(4-Isocyanatophenyl)Methyl]Benzene is a high-purity aromatic diisocyanate monomer, a critical building block for advanced polymer synthesis. Its bifunctional nature provides excellent reactivity for creating polymers with tailored cross-linking density, thermal stability, and mechanical properties. This compound is essential for manufacturers in the polyurethane, coatings, adhesives, and specialty materials industries seeking to develop high-performance products.

Application

• Polyurethane Elastomers: Serves as a key monomer for producing high-performance, wear-resistant elastomers used in industrial wheels, seals, and gaskets.
• Specialty Coatings and Adhesives: Used in formulating advanced two-component polyurethane coatings and adhesives that require excellent chemical resistance and durability.
• Cross-linking Agent for Resins: Functions as an effective cross-linker for hydroxyl-terminated polymers, enhancing the hardness and thermal stability of final resin systems.
• Synthesis of Polyisocyanurates (PIR): A precursor for PIR foams, which are known for their superior fire resistance and thermal insulation properties.
• Advanced Material Research: Utilized in R&D for developing novel polymers, including liquid crystal polymers and high-temperature composites.
• Automotive and Aerospace Components: Incorporated into lightweight, strong composite materials for interior and structural applications.

Basic Information

Product Name	1-Isocyanato-4-[(4-Isocyanatophenyl)Methyl]Benzene
CAS No.	65916-89-4
Molecular Formula	C15H10N2O2
Molecular Weight	250.25 g/mol
Synonyms	4,4'-Methylenebis(phenyl isocyanate) dimer; Bis(4-isocyanatophenyl)methane; MDI Dimer; 1,1'-Methylenebis(4-isocyanatobenzene); 4,4'-Diphenylmethane diisocyanate dimer; p,p'-MDI Dimer; Desmodur TT; Isonate 143L
EINECS	Contact for details

Quality Control

Our production of 1-Isocyanato-4-[(4-Isocyanatophenyl)Methyl]Benzene adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed against comprehensive specifications, including assay, isocyanate content, and impurity profile. Certificates of Analysis (COA) documenting all critical parameters are provided with every shipment to support your quality assurance and regulatory compliance needs.

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). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent reaction with atmospheric moisture. Isocyanate compounds should be stored separately from amines, alcohols, and other reactive materials.

Specification

Item	Specification
Appearance	White to pale yellow crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Isocyanate Content (NCO)	32.0 - 33.5 %
Melting Point	90 - 110 °C
Hydrolyzable Chloride	≤ 0.05 %
Solubility	Soluble in common organic solvents (e.g., acetone, DMF)

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