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Highly selective tertiary amine catalyst optimized for balanced gelling and blowing reactions in polyurethane systems.
Low volatility and reduced odor profile, supporting improved workplace safety and regulatory compliance (e.g., REACH, VOC guidelines).
Excellent solubility and compatibility with common polyols, isocyanates, and formulation additives.
Enables precise control over cream time, rise time, and demold time in flexible and semi-rigid foam production.
Stable under standard storage conditions with extended shelf life when kept sealed and dry.
Flexible slabstock polyurethane foams for bedding and furniture.
Semi-rigid automotive seating and interior trim foams.
Integral skin foams used in steering wheels, armrests, and dash components.
Reaction injection molding (RIM) and structural foam applications.
Water-blown and low-VOC foam formulations requiring reduced emissions.
| Chemical Type | Tertiary amine (N,N,N′,N′-tetramethyl-1,3-butanediamine derivative) |
| Product Form | Liquid |
| Appearance | Clear, pale yellow liquid |
| Primary Applications | Gelling catalyst for flexible & semi-rigid PU foams |
| Key Features | Balanced reactivity, low volatility, high solubility |
| Benefits | Improved processing control, reduced fogging, enhanced foam cell structure |
| Storage Conditions | Store in original sealed container at 15–25°C; protect from moisture and direct sunlight |
| Shelf Life | 24 months from date of manufacture under recommended conditions |
Q1: What is the primary function of TMG 623 in polyurethane systems?
A: TMG 623 is a tertiary amine-based catalyst designed to accelerate the urethane reaction (isocyanate–polyol coupling), offering balanced reactivity and improved flow characteristics—particularly beneficial in flexible slabstock, molded foams, and certain CASE applications.
Q2: Is TMG 623 compatible with both aromatic and aliphatic isocyanates?
A: Yes, TMG 623 demonstrates broad compatibility across common aromatic (e.g., TDI, MDI) and aliphatic (e.g., HDI, IPDI) isocyanates, though optimal performance should be verified within the full formulation due to potential interactions with other additives or surfactants.
Q3: How does TMG 623 compare to traditional amine catalysts like DABCO® 33-LV in terms of odor and volatility?
A: TMG 623 exhibits lower volatility and significantly reduced amine odor compared to many low-molecular-weight tertiary amines, supporting improved workplace handling and reduced post-foaming emissions—making it suitable for applications where odor sensitivity is a concern.
Q4: What is the typical dosage range for TMG 623 in polyurethane foam formulations?
A: Dosage is formulation-dependent, but TMG 623 is typically used at low concentrations—generally ranging from 0.1% to 2% by weight relative to the total polyol blend—with fine-tuning required based on desired cream time, rise profile, and final physical properties.
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