Description

Desmodur Hl is a specialized aliphatic polyisocyanate prepolymer, widely recognized for its role in formulating high-performance polyurethane systems. This compound is critical for achieving superior durability, chemical resistance, and light stability in end products. It is an essential raw material for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to enhance product performance.

Application

Desmodur Hl serves as a key cross-linking agent in various advanced polyurethane formulations. Its primary applications include:

• High-Performance Coatings: Used in automotive clear coats, industrial maintenance paints, and coil coatings where exceptional weatherability, gloss retention, and chemical resistance are required.
• Adhesives & Sealants: Formulated into structural adhesives and flexible sealants that demand strong bonding, elasticity, and resistance to environmental stress.
• Elastomers: A vital component in the production of cast elastomers and thermoplastic polyurethanes (TPU) for applications like rollers, wheels, and industrial belts.
• Light-Stable Binders: Employed in exterior wood and plastic coatings to prevent yellowing and degradation from UV exposure.
• Composite Materials: Used as a matrix resin in fiber-reinforced composites for the automotive and aerospace sectors.

Basic Information

Product Name	Desmodur Hl
CAS No.	39403-53-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Hexamethylene diisocyanate homopolymer; HDI homopolymer; HDI trimer; Poly(hexamethylene diisocyanate); Desmodur N 3300; Tolonate HDT; Bayhydur 3100; Isocyanurate of hexamethylene diisocyanate
EINECS	Contact for details

Quality Control

Our production of Desmodur Hl adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. The product is manufactured under controlled conditions, with critical parameters such as isocyanate content, viscosity, and color index closely monitored. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and key specifications is provided with every shipment to guarantee it meets your formulation requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15°C and 25°C (59°F and 77°F). This product is hygroscopic (moisture-sensitive). Ensure containers are kept tightly sealed to prevent contact with atmospheric moisture, which can lead to polymerization or gelation.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
NCO Content	Contact for details
Viscosity (at 25°C)	Contact for details
Color (Gardner)	≤ 1
Density (at 20°C)	~1.17 g/cm³
Monomer HDI Content	< 0.2%
Solvent Content	Typically solvent-free

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