Description

3,3'-Dimethoxy-4,4'-Biphenylene Diisocyanate is a specialized aromatic diisocyanate monomer characterized by its methoxy-substituted biphenylene core. This unique structure is critical for synthesizing high-performance polyurethane and polyurea polymers with enhanced thermal stability, chemical resistance, and specific optical properties. It is an essential raw material for advanced material scientists and formulators in the coatings, adhesives, and specialty elastomers industries seeking to develop products with tailored performance characteristics.

Application

• High-Performance Polyurethane Coatings: Used as a cross-linking agent to formulate coatings for automotive, aerospace, and industrial equipment requiring exceptional durability, gloss retention, and resistance to chemicals and weathering.
• Specialty Adhesives and Sealants: Serves as a key component in the production of high-strength, flexible adhesives and sealants for demanding applications in construction, electronics, and composite material bonding.
• Advanced Elastomers: Employed in the synthesis of polyurethane and polyurea elastomers for gaskets, rollers, and impact-resistant parts that must perform under extreme mechanical and thermal stress.
• Optical and Electronic Materials: Acts as a monomer for polymers used in optical films, waveguides, or encapsulants, leveraging the methoxy groups to influence refractive index and processability.
• Composite Matrix Resins: Incorporated into resin systems for fiber-reinforced composites, providing robust interfacial adhesion and matrix properties for lightweight structural components.
• Chemical Intermediate: Utilized in organic synthesis for the preparation of other specialty chemicals, including photoactive compounds or ligands for catalysts, due to its reactive isocyanate groups and aromatic backbone.

Basic Information

Product Name	3,3'-Dimethoxy-4,4'-Biphenylene Diisocyanate
CAS No.	91-93-0
Molecular Formula	C₁₆H₁₂N₂O₄
Molecular Weight	296.28 g/mol
Synonyms	3,3'-Dimethoxybenzidine-4,4'-diisocyanate; DMBPI; 4,4'-Diisocyanato-3,3'-dimethoxybiphenyl; 3,3'-Dimethoxy-4,4'-diisocyanatobiphenyl; 3,3'-Dimethoxy-[1,1'-biphenyl]-4,4'-diyl diisocyanate; BITD (Bis-isocyanato-toluene derivative); o-Dianisidine Diisocyanate; Biphenyl-4,4'-diisocyanate, 3,3'-dimethoxy-
EINECS	202-108-6

Quality Control

Our 3,3'-Dimethoxy-4,4'-Biphenylene Diisocyanate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including assay, isomer content, and impurity profiling, to ensure it meets precise specifications for high-purity applications. Certificates of Analysis (COA) documenting purity, physical properties, and safety data are available upon request 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). 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 water.

Specification

Item	Specification
Appearance	White to pale yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Isomer Content	Reported on COA
Hydrolyzable Chlorine	≤ 0.1%
Melting Point	Reported on COA
Moisture (KF)	≤ 0.1%

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