Description

Hexamethylene Diisocyanate (HDI) is a key aliphatic diisocyanate monomer essential for producing high-performance polyurethane materials. Its primary value lies in providing excellent light stability, color retention, and resistance to yellowing and degradation from UV exposure. This makes it indispensable for industries requiring durable, high-quality surface coatings and elastomers. Key users include manufacturers in the automotive, aerospace, industrial maintenance coatings, and specialty adhesives sectors.

Application

• Polyurethane Coatings: Primary component in light-stable, aliphatic polyurethane coatings for automotive OEM and refinish, aerospace, and industrial maintenance.
• Elastomers and Sealants: Used in the synthesis of high-performance, weather-resistant polyurethane elastomers, sealants, and adhesives.
• UV-Curable Systems: Serves as a reactive intermediate in formulations for UV-curable coatings, inks, and resins.
• Crosslinking Agent: Functions as a crosslinker for polyols and other hydroxyl-functional polymers to enhance mechanical properties and chemical resistance.
• Specialty Polymers: Key raw material for producing polyisocyanurate foams, dispersions (PUDs), and other advanced polymer systems.
• Automotive Plastics: Used in coatings for interior and exterior automotive plastic components to prevent yellowing.

Basic Information

Product Name	Hexamethylene Diisocyanate
CAS No.	822-06-0
Molecular Formula	C8H12N2O2
Molecular Weight	168.19 g/mol
Synonyms	HDI; 1,6-Diisocyanatohexane; Hexane-1,6-diisocyanate; 1,6-Hexamethylene Diisocyanate; Desmodur H; Mondur HX; DDI; HMDI (Note: HMDI typically refers to hydrogenated MDI); Isocyanic Acid, Hexamethylene Ester; Hexamethylene-1,6-diisocyanate
EINECS	212-485-8

Quality Control

Our Hexamethylene Diisocyanate is manufactured under stringent process controls to ensure batch-to-batch consistency and high purity. Quality is verified through a comprehensive suite of analytical tests including assay, isocyanate content, hydrolyzable chloride, and color (APHA). We provide full traceability and Certificates of Analysis (COA) are available for every shipment, confirming compliance with relevant industry specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at temperatures between 15-25°C (59-77°F). Due to its hygroscopic and moisture-sensitive nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) 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	Colorless to pale yellow liquid
Assay (by Titration)	≥ 99.5%
Isocyanate Content (NCO)	~49.8 - 50.2 %
Hydrolyzable Chloride	≤ 0.01 %
Color (APHA)	≤ 30
Density at 25°C	~1.05 g/cm³
Viscosity at 25°C	~3 mPa·s
Identification (IR)	Conforms

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