Isophorone Diisocyanate

Product Overview

Isophorone diisocyanate (IPDI), CAS 4098-71-9, is a premium aliphatic cycloaliphatic diisocyanate and one of the most important specialty raw materials in the polyurethane industry. As a colorless to slightly yellowish liquid with a boiling point of 287°C, IPDI delivers exceptional weathering resistance, non-yellowing performance, and excellent mechanical properties to polyurethane systems.

Derived from isophoronediamine (IPDA, CAS 2855-13-2), IPDI's unique aliphatic structure ensures that cured polyurethane products maintain color stability and transparency under prolonged UV exposure — a critical advantage over aromatic diisocyanates like TDI and MDI. It is widely regarded as the material of choice for high-end coatings, medical-grade polyurethanes, and outdoor applications requiring long-term durability.

Key Applications

• High-Performance Coatings: Premium raw material for automotive OEM finishes, refinish paints, industrial anticorrosion coatings, wood finishes, and marine paints — delivers outstanding color retention, UV resistance, and gloss stability; cured films remain transparent and non-yellowing even after years of outdoor exposure
• Polyurethane Elastomers: Manufacturing of seals, gaskets, industrial rollers, shoe soles, and sports flooring — high elasticity with excellent abrasion resistance, oil resistance, and hydrolysis stability
• Adhesives & Sealants: Structural adhesives, construction sealants, laminating adhesives for flexible packaging, and automotive windshield bonding sealants — flexible cured bonds with excellent aging resistance and wide temperature tolerance (-40°C to 120°C)
• Medical-Grade Polyurethanes: Medical catheters, artificial blood vessels, wound dressings, and medical adhesives — low toxicity with excellent biocompatibility; one of the few diisocyanates approved for biomedical applications
• Textile & Leather Treatment: Waterproof breathable coatings, synthetic leather (PU leather), and textile finishing agents — soft hand feel with excellent abrasion resistance and wash durability
• Electronic Encapsulation: Potting and encapsulation materials for electronic components — provides electrical insulation and moisture protection for sensitive devices
• Water Treatment Membranes: Modification material for reverse osmosis membranes and ultrafiltration membranes — enhances membrane selectivity and chemical stability

Product Features

• Non-Yellowing: Aliphatic structure prevents discoloration under UV exposure — essential for clear coatings and outdoor applications
• Excellent Weathering Resistance: Cured polyurethanes resist chalking, cracking, and degradation in harsh outdoor environments
• High Thermal Stability: Suitable for applications requiring continuous service at elevated temperatures
• Superior Biocompatibility: One of the few diisocyanates with low toxicity suitable for medical and healthcare applications
• Excellent Adhesion: Strong bonding to metals, plastics, wood, and glass — versatile across multiple substrates
• Low Viscosity: Easy processing and formulation with polyols, enabling uniform mixing and defect-free curing
• Regulatory Compliance: REACH-registered and suitable for applications requiring strict regulatory compliance

Packaging & Supply

Standard packaging includes 200kg steel drums and IBC totes, customized to customer requirements. Store in sealed containers in cool, dry, well-ventilated areas away from moisture, heat, and incompatible materials. Shelf life: 12 months under proper storage conditions. Handle with appropriate PPE — toxic substance (UN 2290, Class 6.1).