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Aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) trimer, offering excellent UV stability and color retention.
Low viscosity formulation enabling easy handling, precise metering, and efficient mixing with hydroxyl-functional resins.
Non-yellowing performance ideal for high-gloss, decorative, and outdoor-cured coatings requiring long-term clarity.
Compliant with REACH and meets VOC regulations for industrial coating applications in Europe and North America.
Consistent reactivity profile ensures reliable pot life and film formation across varying ambient conditions.
Automotive clearcoats and OEM topcoats requiring superior weather resistance and gloss retention.
Industrial maintenance coatings for machinery, agricultural equipment, and metal structures.
Architectural façade and aluminum composite panel (ACP) coatings exposed to harsh environmental conditions.
Plastic coatings for automotive interior trim and consumer electronics housings.
High-performance wood finishes for premium furniture and flooring applications.
| Chemical Type | Aliphatic HDI-based polyisocyanate (trimer) |
| Product Form | Liquid |
| Appearance | Clear, colorless to pale yellow liquid |
| NCO Content (wt %) | 15.5 – 16.5 |
| Viscosity at 25°C (mPa·s) | 800 – 1,200 |
| Density at 20°C (g/cm³) | 1.17 – 1.21 |
| Flash Point (PMCC, °C) | 145 – 155 |
| Primary Applications | Two-component polyurethane coatings for automotive, industrial, and architectural use |
Q1: What is the primary chemical composition of Evonik T1890 100?
A: Evonik T1890 100 is a low-viscosity, aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) trimer chemistry. It contains no solvents and is designed for high-performance two-component polyurethane systems requiring excellent weather resistance and low yellowing.
Q2: How should T1890 100 be stored to maintain stability and performance?
A: Store in tightly sealed original containers under dry, cool conditions (typically below 30 °C) and protected from moisture, heat, and direct sunlight. Prolonged exposure to humidity or elevated temperatures may lead to premature gelation or viscosity increase due to reaction with ambient moisture.
Q3: What is the typical pot life when T1890 100 is mixed with common polyol resins?
A: Pot life varies significantly depending on polyol type, NCO:OH ratio, temperature, and presence of catalysts. At 23 °C and stoichiometric mixing, usable pot life generally ranges from 2 to 6 hours. Higher temperatures or catalyzed formulations will reduce working time accordingly.
Q4: Is T1890 100 compatible with moisture-cured or one-component PU systems?
A: No — T1890 100 is specifically formulated as a two-component curing agent for hydroxyl-terminated resins. It is not intended for use in moisture-cured or blocked isocyanate systems, as its reactivity profile and functionality are optimized for controlled NCO–OH reactions in solventborne or high-solids 2K PU coatings and adhesives.
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