TRANS-1,4-CYCLOHEXANE DIISOCYANATE

📌Basic Information

✨Product Introduction and Core Features

Anti-1,4-cyclohexyl diisocyanate is a high-performance specialty isocyanate monomer whose core value lies in the outstanding comprehensive properties conferred by its alicyclic structure:

Exceptional weather resistance and anti-yellowing properties:

The most critical characteristic. Since its molecule lacks unsaturated structures like benzene rings that are vulnerable to UV attack, polyurethane materials (e.g., coatings, elastomers) prepared from it exhibit outstanding resistance to UV-induced aging. They maintain color and gloss without yellowing or chalking over extended periods. This represents its greatest advantage over aromatic isocyanates (e.g., TDI, MDI).

Superior Mechanical Properties and Rigidity:

The cyclohexane ring provides excellent rigidity, hardness, and heat deflection temperature. Polymers derived from it typically exhibit high modulus, tensile strength, and good heat resistance.

Good Chemical Stability and Hydrolysis Resistance:

The saturated alicyclic structure confers stability against chemicals and moisture, making it suitable for harsh environments.

Reactivity:

Its -NCO group reactivity is generally higher than that of aromatic isocyanates, though this can be modulated by catalysts. Due to its structural symmetry (trans configuration), it forms regular polymer structures.

Stereoisomers:

Note that 1,4-cyclohexyl diisocyanate exists as cis and trans geometric isomers. The trans isomer (CAS No. 7517-76-2) is generally valued higher and more frequently referenced/used due to its symmetry and ability to form more regular polymers, which typically yield superior final material properties (e.g., higher crystallinity, melting point, and mechanical strength).

📊Primary Application Areas
Anti-1,4-CHDI is primarily used in synthesizing high-performance, high-value-added polyurethane and polyurea materials:

High-Performance Coatings:

Weather-Resistant Coatings: Automotive original equipment manufacturer (OEM) paints, automotive refinish paints, premium industrial topcoats, aerospace coatings, wind turbine blade coatings, etc., requiring long-term gloss and color retention.

Corrosion-Resistant Coatings:
For harsh environments such as offshore platforms, bridges, and chemical processing equipment.

Elastomers:

Manufacturing yellowing-resistant polyurethane elastomers with high mechanical strength, e.g., high-performance rollers, seals, transmission belts, and sports equipment.

Adhesives and Sealants:

For structural adhesives and sealants requiring high weather resistance, strength, and aging resistance.

Specialty Polymers:

Serve as key monomers for synthesizing precursors or modifiers for high-heat-resistant engineering plastics like polyimides and polyamides.

📦Packaging and Storage
Packaging: Due to its extreme sensitivity to moisture, packaging must be strictly sealed, dry, and nitrogen-flushed. Common specifications include: 1kg, 5kg, and 20kg galvanized iron drums or dedicated stainless steel containers.

Storage: Must be stored in a cool, dry, well-ventilated warehouse at an ideal temperature of 0-25°C, away from heat sources and open flames. Avoid contact with moisture, alcohols, amines, and other substances containing reactive hydrogen.

Hazards: This product is a toxic chemical exhibiting strong irritant and sensitizing effects on eyes, skin, and respiratory tract. Full protective gear (chemical goggles, chemical-resistant gloves, protective clothing, etc.) must be worn during handling. Operations should be conducted under well-ventilated conditions to prevent vapor inhalation.