Description

3A,4,5,6,7,7A-Hexahydro-4,7-Methanoindan-1,8-Ylenediisocyanate is a specialized alicyclic diisocyanate monomer, a key building block for high-performance polymers. Its unique bridged-ring structure provides enhanced thermal stability, chemical resistance, and weatherability to polyurethane and polyurea systems compared to aromatic alternatives. This product is essential for formulators in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to develop advanced materials for demanding applications.

Application

• High-Performance Coatings: Used in automotive clear coats, industrial maintenance coatings, and aerospace finishes where exceptional gloss retention, UV resistance, and durability are required.
• Specialty Elastomers: Serves as a core component in the production of cast, thermoplastic, and millable polyurethane elastomers for seals, gaskets, rollers, and impact-resistant parts.
• Advanced Adhesives & Sealants: Imparts excellent adhesion and flexibility in structural adhesives for composites and high-performance sealants for construction and automotive applications.
• Weatherable Polyurea Systems: A critical raw material for spray polyurea elastomers used in truck bed liners, waterproofing membranes, and industrial linings.
• Optical and Electronic Materials: Employed in the synthesis of polyurethane resins for optical lenses, encapsulants, and potting compounds due to its purity and clarity.
• Crosslinking Agent: Functions as an effective crosslinker for polyols and other hydroxyl-functional polymers to enhance mechanical properties and chemical resistance.

Basic Information

Product Name	3A,4,5,6,7,7A-Hexahydro-4,7-Methanoindan-1,8-Ylenediisocyanate
CAS No.	4747-82-4
Molecular Formula	C₁₂H₁₂N₂O₂
Molecular Weight	216.24 g/mol
Synonyms	NBDI (Norbornane Diisocyanate); Bicyclo[2.2.1]heptane-2,5-diylbis(methylene) diisocyanate; 4,7-Methano-1H-indene-1,8(2H)-diyl diisocyanate, hexahydro-; Norbornane diisocyanate; 1,8-Diisocyanato-4,7-methanohexahydroindan; Norbornane bis(isocyanatomethyl); NBDI Monomer; Desmodur® NBDI (trade name)
EINECS	225-268-8

Quality Control

Our production of 3A,4,5,6,7,7A-Hexahydro-4,7-Methanoindan-1,8-Ylenediisocyanate adheres to a stringent quality management system to ensure batch-to-batch consistency and high purity. Each lot is analyzed against rigorous internal specifications using advanced techniques like HPLC, GC, and titration. A comprehensive Certificate of Analysis (COA) detailing assay, isocyanate content, hydrolyzable chloride, and other critical parameters 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, 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 dry air) 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	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (NCO Content)	≥ 38.5 %
Purity (HPLC)	≥ 99.0 %
Hydrolyzable Chloride	≤ 0.01 %
Viscosity @ 25°C	Contact for details
Specific Gravity @ 25°C	~1.18
Flash Point	> 110 °C

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