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Highly selective tertiary amine catalyst optimized for polyol-isocyanate reaction kinetics.
Low volatility and minimal odor, supporting safer handling and improved workplace air quality.
Excellent compatibility with conventional polyether and polyester polyols.
Enables balanced reactivity for both foam rise and gelation—reducing collapse and shrinkage risks.
Non-corrosive to processing equipment and stable under standard storage conditions.
Flexible slabstock polyurethane foam for bedding and furniture manufacturing.
Automotive seating and interior trim foams requiring consistent cell structure.
High-resilience (HR) foam formulations demanding precise cream-to-gel timing control.
Integral skin foams used in steering wheels, armrests, and dash components.
Water-blown and low-VOC foam systems compliant with environmental regulations.
| Chemical Type | Tertiary amine |
| Product Form | Liquid |
| Appearance | Clear, pale yellow liquid |
| Density (25°C) | 0.92–0.94 g/cm³ |
| Refractive Index (25°C) | 1.470–1.480 |
| pH (10% aqueous solution) | 10.5–11.2 |
| Primary Applications | Flexible polyurethane foam catalysis |
| Key Features | Balanced gelling/rising activity, low volatility, non-corrosive |
Q1: What is the primary function of TMG 256 in polyurethane systems?
A: TMG 256 is a highly selective tertiary amine catalyst that promotes the urethane reaction (isocyanate–polyol coupling) while exhibiting minimal activity toward the urea-forming reaction (isocyanate–water), making it especially suitable for applications requiring controlled foam rise and fine cell structure.
Q2: Is TMG 256 compatible with moisture-sensitive or low-emission formulations?
A: Yes — TMG 256 has low volatility and negligible odor compared to many conventional amine catalysts, supporting its use in low-VOC and indoor air quality–sensitive applications such as automotive interior foams and residential insulation.
Q3: How should TMG 256 be handled and stored to maintain performance stability?
A: Store in tightly sealed original containers under dry, cool conditions (below 30 °C) and protect from prolonged exposure to moisture or strong oxidizing agents. It is hygroscopic and may absorb atmospheric water over time, which can affect catalytic efficiency in precision formulations.
Q4: Can TMG 256 be used in both flexible and rigid polyurethane foam systems?
A: Yes — it is widely employed in both flexible slabstock and rigid insulation foams, particularly where balanced reactivity, good flow characteristics, and dimensional stability are required. Performance optimization typically involves pairing it with complementary catalysts depending on the specific system demands.
Q5: What is the typical dosage range for TMG 256 in standard polyurethane formulations?
A: Dosage depends on formulation requirements and desired cure profile, but it is generally used at low concentrations — typically ranging from 0.1% to 2% by weight relative to the total polyol component. Fine-tuning is recommended through small-scale trials to achieve optimal processing window and final properties.
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E-mail: wangxingqiang@ericwchem.com
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