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Delayed-action tin-based catalyst offering controlled reactivity onset during polyurethane processing.
Enhanced pot life stability compared to standard dibutyltin dilaurate (DBTDL) catalysts.
Improved hydrolytic stability for consistent performance in moisture-sensitive formulations.
Low volatility and reduced odor profile, supporting safer handling and improved workplace compliance.
Compatible with a broad range of polyols, isocyanates, and formulation additives.
Flexible and rigid polyurethane foam manufacturing, especially for slabstock and molded foams.
Coatings and adhesives requiring extended working time and precise gelation control.
Sealants and elastomers where delayed cure onset improves flow and surface leveling.
Reaction injection molding (RIM) and structural foam systems demanding reproducible cycle times.
Water-blown or low-VOC polyurethane formulations seeking regulatory-compliant catalysis.
| Chemical Type | Tin(II) carboxylate complex (delayed-action organotin catalyst) |
| Product Form | Liquid |
| Appearance | Clear, pale yellow to amber liquid |
| Primary Applications | Polyurethane flexible/rigid foams, coatings, adhesives, sealants, elastomers |
| Key Features | Delayed reactivity onset, extended pot life, hydrolytic stability, low volatility |
| Benefits | Improved process control, reduced scorching, enhanced surface quality, safer handling |
| Storage Recommendation | Store in original sealed container at 15–25°C; protect from moisture and direct sunlight |
| Regulatory Status | REACH registered; not classified as SVHC under current ECHA guidelines |
Q1: What is the primary function of BiCAT 2536 in polyurethane systems?
A: BiCAT 2536 is a delayed-action tertiary amine catalyst designed to provide controlled reactivity in polyurethane foam and elastomer formulations. It enables extended cream time and improved flow before onset of rapid gelation, supporting better mold filling and surface finish.
Q2: How does BiCAT 2536 differ from conventional amine catalysts like DABCO 33-LV or TEDA?
A: Unlike fast-acting catalysts, BiCAT 2536 exhibits thermal latency — its catalytic activity increases significantly only after reaching a threshold temperature during processing. This delay allows for greater formulation flexibility, reduced risk of premature reaction, and enhanced processing window in reactive injection molding (RIM) and slabstock foam production.
Q3: Is BiCAT 2536 compatible with common polyurethane raw materials, including polyols and isocyanates?
A: Yes, BiCAT 2536 demonstrates broad compatibility with aromatic and aliphatic isocyanates (e.g., MDI, TDI, HDI), as well as polyester and polyether polyols. It is also stable in the presence of common co-catalysts, surfactants, and blowing agents used in flexible and semi-rigid foam systems.
Q4: What is the typical dosage range for BiCAT 2536 in industrial formulations?
A: Dosage depends on the specific formulation requirements and desired reactivity profile, but BiCAT 2536 is typically used at low concentrations — generally ranging from 0.1% to 2% by weight relative to the total polyol blend. Optimization is recommended through small-scale trials under actual processing conditions.
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E-mail: wangxingqiang@ericwchem.com
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