Description

4,4'-Diisocyanato-3,3',5,5'-Tetraethyldiphenylmethane is a specialized aromatic diisocyanate monomer, a key building block in the synthesis of high-performance polymers. Its unique tetraethyl-substituted structure imparts enhanced solubility and tailored reactivity compared to conventional diphenylmethane diisocyanates (MDI), making it valuable for creating polymers with specific mechanical and thermal properties. This compound is primarily utilized by R&D chemists and formulators in the advanced polyurethane, coatings, and specialty adhesive industries seeking to develop next-generation materials. CAS NO 105442-35-1.

Application

• High-Performance Polyurethane Elastomers: Used as a core monomer to synthesize polyurethanes with superior mechanical strength, chemical resistance, and thermal stability for demanding industrial applications.
• Specialty Coatings and Paints: Serves as a cross-linking agent in formulations for advanced protective coatings, offering enhanced durability, flexibility, and adhesion to various substrates.
• Adhesives and Sealants: A critical component in the production of high-bond-strength, moisture-curing adhesives and sealants used in automotive, aerospace, and construction.
• Polyurethane Foams: Employed in the development of specialized rigid or flexible foams where specific density, cell structure, and insulation properties are required.
• Polymer Modification and Research: Acts as a versatile intermediate in academic and industrial R&D for creating novel copolymers, dendrimers, and other advanced polymeric materials.
• Encapsulation and Potting Compounds: Used in formulations for electronic encapsulation, providing excellent moisture barrier properties and protection against environmental stress.

Basic Information

Product Name	4,4'-Diisocyanato-3,3',5,5'-Tetraethyldiphenylmethane
CAS No.	105442-35-1
Molecular Formula	C23H28N2O2
Molecular Weight	364.48 g/mol
Synonyms	3,3',5,5'-Tetraethyl-4,4'-diisocyanatodiphenylmethane; Tetraethyl-MDI; 4,4'-Methylenebis(2,6-diethylphenyl isocyanate); 1,1'-Methylenebis(4-isocyanato-3,5-diethylbenzene); Bis(4-isocyanato-3,5-diethylphenyl)methane; 3,3',5,5'-Tetraethyl-4,4'-methylenedi(phenyl isocyanate); MDI derivative, tetraethyl substituted; TEDI (Tetraethyldiphenylmethane Diisocyanate)
EINECS	Contact for details

Quality Control

Our 4,4'-Diisocyanato-3,3',5,5'-Tetraethyldiphenylmethane is manufactured under stringent quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the precise requirements of advanced polymer synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, isocyanate content, and impurity profiles is 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 or argon) to prevent reaction with atmospheric moisture, which can lead to polymerization or gelation. Keep away from heat, sparks, open flames, and incompatible materials such as alcohols, amines, and strong bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or solid
Identification (IR)	Conforms to structure
Assay (NCO Content)	≥ 98.0 %
Purity (HPLC)	≥ 97.0 %
Hydrolyzable Chloride	≤ 50 ppm
Total Chlorine	≤ 100 ppm
Viscosity (at 25°C)	Reported on COA
Specific Gravity (at 25°C)	Reported on COA

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