Description

Poly(Hexamethylene Diisocyanate) is a versatile aliphatic diisocyanate monomer, primarily used as a building block for high-performance polyurethanes and other polymers. Its value lies in providing excellent light stability, chemical resistance, and mechanical properties to the final materials, making it superior to aromatic alternatives in applications requiring durability against yellowing and degradation. This product is essential for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for producing specialty polymers for automotive, textile, and industrial applications.

Application

• Production of light-stable, non-yellowing polyurethane (PU) coatings for automotive, aerospace, and industrial finishes.
• Manufacturing of high-performance PU adhesives and sealants with excellent flexibility and chemical resistance.
• Synthesis of aliphatic polyurethane elastomers for demanding applications like rollers, wheels, and gaskets.
• Key raw material for waterborne polyurethane dispersions (PUDs) used in textiles, leather finishing, and eco-friendly coatings.
• Crosslinking agent in specialty polymers, including polyureas and polyisocyanurates, for enhanced thermal and mechanical properties.
• Production of synthetic leathers, artificial fibers, and other advanced materials requiring durability and weatherability.

Basic Information

Product Name	Poly(Hexamethylene Diisocyanate)
CAS No.	28182-81-2
Molecular Formula	(C8H12N2O2)n
Molecular Weight	Varies (Polymeric mixture)
Synonyms	HDI Biuret; HDI-based Polyisocyanate; Hexamethylene Diisocyanate Biuret; Poly(1,6-diisocyanatohexane); HDI Trimer (common term); Aliphatic Polyisocyanate; Desmodur N; Tolonate HDB
EINECS	Contact for details

Quality Control

Our Poly(Hexamethylene Diisocyanate) is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing to ensure consistency and compliance with industry specifications. Key parameters such as NCO content, viscosity, monomer content, and color are strictly monitored. A Certificate of Analysis (COA) is provided with every shipment to guarantee product quality and traceability.

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); containers must be kept tightly sealed under a dry atmosphere (e.g., under dry nitrogen) to prevent reaction with atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
NCO Content	21.0 - 23.0 %
Viscosity (25°C)	2500 ± 500 mPa·s
HDI Monomer Content	< 0.5 %
Color (Gardner)	≤ 2
Specific Gravity (25°C)	1.16 - 1.18
Flash Point	> 200 °C

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