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Highly selective bismuth-based catalyst for polyurethane foam systems.
Low toxicity profile compared to traditional amine or tin catalysts.
Excellent hydrolytic stability and long shelf life under ambient storage conditions.
Enables balanced reactivity—promotes both gelling and blowing reactions without excessive foaming.
Compatible with a wide range of polyols, isocyanates, and auxiliary additives.
Flexible slabstock polyurethane foam production.
Integral skin and molded foam manufacturing.
Automotive seating and interior trim foams.
Industrial insulation foams requiring low-VOC formulations.
Water-blown and low-emission cold-cure foam systems.
| Chemical Type | Bismuth carboxylate complex |
| Product Form | Liquid |
| Appearance | Clear, amber to light brown liquid |
| Primary Applications | Polyurethane flexible foam catalysis |
| Key Features | Non-tin, non-amine, REACH-compliant |
| Storage Conditions | Store in sealed containers at 15–25°C; protect from moisture |
| Shelf Life | 24 months from date of manufacture when stored properly |
| Regulatory Status | Not classified as hazardous per GHS (Rev. 8) |
Q1: What is the primary function of Shepherd BiCAT 8118 in polyurethane systems?
A: Shepherd BiCAT 8118 is a bismuth-based catalyst designed to promote urethane (polyol–isocyanate) reaction kinetics while offering significantly reduced toxicity and environmental impact compared to traditional tin catalysts like DBTDL. It provides balanced reactivity for gelation and surface cure in flexible and rigid foams, coatings, and adhesives.
Q2: Is BiCAT 8118 compatible with other catalysts or additives commonly used in PU formulations?
A: Yes — BiCAT 8118 is generally compatible with amine catalysts (e.g., DABCO, TEDA), surfactants, flame retardants, and fillers used in standard polyurethane processing. However, compatibility should be verified experimentally in each specific formulation due to potential interactions with acidic components or highly reactive co-catalysts.
Q3: How does BiCAT 8118 compare to tin-based catalysts in terms of shelf life and thermal stability?
A: BiCAT 8118 exhibits excellent storage stability under recommended conditions (cool, dry, tightly sealed) and maintains catalytic activity over extended periods. Unlike some organotin compounds, it shows improved resistance to hydrolysis and thermal degradation during processing, supporting consistent performance across multiple production batches.
Q4: What are typical handling and safety considerations for BiCAT 8118?
A: As a low-toxicity bismuth carboxylate, BiCAT 8118 poses minimal acute health hazards relative to legacy tin catalysts. Standard industrial hygiene practices apply: use in well-ventilated areas, avoid inhalation of mists or dust, and wear appropriate PPE such as nitrile gloves and safety goggles. Refer to the current Safety Data Sheet (SDS) for detailed handling, disposal, and first-aid guidance.
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E-mail: wangxingqiang@ericwchem.com
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