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Low-viscosity, solvent-free aliphatic trimer-based polyisocyanate offering excellent storage stability.
Provides fast room-temperature cure kinetics with balanced pot life for efficient coating and adhesive processing.
Delivers outstanding chemical resistance, particularly to solvents, acids, and alkalis, in cured polyurethane systems.
Enables high crosslink density without excessive brittleness, supporting excellent mechanical durability and flexibility.
Complies with REACH and meets stringent VOC regulations due to its non-volatile, low-monomer-content formulation.
High-performance industrial maintenance coatings for steel and concrete infrastructure.
Two-component polyurethane floor coatings requiring rapid return-to-service and abrasion resistance.
Automotive refinish clearcoats and basecoat/clearcoat systems demanding gloss retention and UV stability.
Specialty adhesives and sealants for transportation and construction where thermal and chemical resilience is critical.
Protective linings for tanks and piping in chemical handling environments.
| Chemical Type | TDI-based aliphatic trimer (isocyanurate) |
| Product Form | Liquid |
| Appearance | Clear, pale yellow liquid |
| NCO Content (wt %) | 19.5–20.5% |
| Viscosity at 25°C (mPa·s) | 800–1,200 |
| Specific Gravity (20°C) | 1.20–1.24 |
| Storage Stability (unopened, 25°C) | ≥12 months |
| Key Features | Solvent-free, low monomer TDI (<0.1%), non-yellowing |
Q1: What is the primary function of Desmodur IL 1451 in coating and adhesive formulations?
A: Desmodur IL 1451 is a low-viscosity, aliphatic TDI-based trimer curing agent designed to react with hydroxyl-functional resins (e.g., polyesters, acrylics, or polyethers) to form crosslinked polyurethane networks. It provides excellent chemical resistance, hardness development, and low-temperature cure performance without requiring strong catalysts.
Q2: How does Desmodur IL 1451 compare to aromatic isocyanate trimers in terms of yellowing and UV stability?
A: As a TDI-based trimer, Desmodur IL 1451 offers improved UV stability and reduced tendency to yellow compared to standard aromatic monomeric TDI, though it is not fully non-yellowing like aliphatic isocyanates (e.g., HDI or IPDI trimers). It is suitable for indoor applications and light-exposed coatings where moderate color stability is required.
Q3: What are typical handling and storage recommendations for this product?
A: Desmodur IL 1451 should be stored in tightly sealed containers under dry, inert conditions (e.g., nitrogen blanket) at temperatures between 15–25 °C. Prolonged exposure to moisture, elevated temperatures, or ambient humidity may lead to gelation or viscosity increase due to uretdione decomposition or side reactions.
Q4: Is Desmodur IL 1451 compatible with common solvent-based and high-solids polyol systems?
A: Yes — Desmodur IL 1451 exhibits good miscibility with a broad range of polyester, acrylic, and polyether polyols in common organic solvents (e.g., xylene, acetates, glycol ethers). Its low viscosity supports formulation of high-solids coatings while maintaining pot life suitable for industrial spray or roll-coating processes.
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