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Low-toxicity organobismuth compound with significantly reduced environmental and handling hazards compared to traditional heavy-metal catalysts.
High catalytic activity for polyurethane foam formation at ambient to moderate temperatures (20–60 °C).
Excellent hydrolytic stability—resists decomposition in moisture-containing formulations.
Compatible with a broad range of polyols, isocyanates, and blowing agents without adverse side reactions.
Non-corrosive to standard stainless steel and aluminum processing equipment.
Flexible polyurethane slabstock foam production for bedding and automotive seating.
Rigid polyurethane and polyisocyanurate (PIR) foams used in building insulation panels.
Integral skin and microcellular foams for automotive trim and gasketing applications.
Water-blown foam systems requiring low-emission, VOC-compliant catalysts.
| Chemical Type | Organobismuth carboxylate complex |
| Product Form | Clear, viscous liquid |
| Appearance | Pale yellow to amber transparent liquid |
| Bismuth Content (as Bi) | 12.0–13.5 wt% |
| Density (25 °C) | 1.42–1.48 g/cm³ |
| Viscosity (25 °C) | 250–400 mPa·s |
| Flash Point (PMCC) | 165 °C minimum |
| Storage Stability | ≥24 months at 5–30 °C under inert atmosphere |
Q1: What is the primary function of DY-20 in polyurethane systems?
A: DY-20 serves as a highly selective and efficient catalyst for urethane formation (isocyanate–polyol reaction), offering balanced reactivity with minimal promotion of undesirable side reactions such as trimerization or hydrolysis.
Q2: How does DY-20 compare to traditional tin-based catalysts like DBTDL?
A: DY-20 provides comparable catalytic activity to dibutyltin dilaurate (DBTDL) in many flexible and rigid foam applications, while offering improved hydrolytic stability and reduced regulatory concerns associated with organotin compounds.
Q3: Is DY-20 compatible with common polyurethane raw materials and additives?
A: Yes — DY-20 demonstrates good compatibility with a wide range of polyols (including polyester and polyether types), isocyanates (e.g., MDI, TDI, and aliphatic isocyanates), surfactants, blowing agents, and flame retardants commonly used in PU formulations.
Q4: What is the typical dosage range for DY-20 in industrial formulations?
A: DY-20 is typically used at low concentrations, generally ranging from 0.1% to 2% by weight relative to the polyol component; optimal dosage depends on formulation requirements, desired gel time, and processing conditions.
Q5: Does DY-20 require special handling or storage conditions?
A: DY-20 should be stored in tightly sealed containers under dry, cool conditions away from moisture and strong oxidizing agents; it is stable under normal ambient storage but may undergo gradual degradation upon prolonged exposure to humidity or elevated temperatures.
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