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DMDEE (CAS No. 6425-39-4) is a high-performance amine catalyst celebrated for its selective activation of isocyanate-water reactions—a critical process in moisture-cured polyurethane (PU) systems. With a molecular formula of C₁₂H₂₄N₂O₂ and a molecular weight of 228.33 g/mol, this low-odor liquid (density 0.98 g/cm³) delivers excellent stability in one-component formulations, where curing relies on atmospheric moisture. Its unique morpholine-derived structure makes it indispensable in construction adhesives, textile coatings, and medical devices, where it combines fast curing with superior mechanical properties and regulatory compliance.
Moisture-Sensitive Catalysis
DMDEE’s structure enables targeted activation of water-induced cross-linking in one-component PU sealants and adhesives, a key advantage in applications where on-demand curing is critical. Under 50% relative humidity (RH) conditions, it achieves tack-free times ≤ 10 minutes—significantly faster than traditional catalysts like DMEA (dimethylaminoethanol). In polyurethane foams, this translates to a 40% reduction in cure time, accelerating production cycles without sacrificing foam quality .
Low Volatility and Odor
With volatile compound emissions of ≤5 ppm, DMDEE meets the strictest indoor air quality requirements, making it suitable for indoor applications such as acoustic panels (used in offices and schools) and medical-grade foams (for hospital mattresses and wheelchair cushions). Its low odor profile also enhances worker comfort during manufacturing, reducing the need for specialized ventilation systems .
Thermal and Chemical Resistance
DMDEE exhibits excellent stability in high-temperature environments (up to 150°C), ensuring long-term performance in applications like engine compartment sealants and industrial oven coatings. It also resists degradation in aggressive chemical media, including oils, greases, and weak acids, making it ideal for industrial coatings exposed to harsh operating conditions. This resistance extends the service life of coated components by up to 30% compared to products using less stable catalysts .
Sustainable Formulation
DMDEE supports green manufacturing initiatives, being compliant with FDA (Food and Drug Administration) regulations for indirect food contact and EU Cosmetics Regulation (EC 1223/2009) for personal care applications. It is non-toxic (LD50 > 2000 mg/kg in rat oral tests) and biodegradable (80% degradation in 28 days per OECD 301B), aligning with corporate sustainability goals and eco-label requirements .
Construction and Infrastructure
Sealants and Adhesives: DMDEE enhances elongation at break (≥400%) in PU joint sealants used in bridges, airports, and commercial buildings. These sealants maintain flexibility across temperature extremes (-40°C to 80°C) and exhibit excellent resistance to UV radiation and weathering, reducing maintenance costs over time .
Floor Coatings: In polyurethane self-leveling floor systems, DMDEE improves abrasion resistance, with Taber abrasion loss ≤ 50 mg/1000 cycles—a key metric for high-traffic areas like warehouses, shopping malls, and manufacturing facilities .
Textile and Apparel
Waterproof Coatings: For outdoor fabrics (e.g., tents, rain jackets), DMDEE promotes cross-linking in PU-based water-repellent coatings, achieving a hydrostatic head ≥ 5000 mm—indicating resistance to water penetration under pressure. This ensures long-lasting waterproof performance even after repeated washing .
Sportswear: In athletic shoes and compression gear, DMDEE enhances elastic recovery in microcellular foams, reducing compression set by 15%. This maintains cushioning properties during intense physical activity, improving comfort and performance .
Medical and Consumer Goods
Medical Devices: DMDEE ensures sterility compatibility in PU-based catheters, wound dressings, and implants, passing cytotoxicity testing (ISO 10993)—a critical requirement for biocompatible materials. Its low leachability also minimizes adverse reactions in patients .
Consumer Electronics: In smartphone cases, tablet covers, and wearable devices, DMDEE improves shock absorption in microcellular foams, achieving impact resistance ≥ 5 J. This protects devices from damage during accidental drops, enhancing product durability and user satisfaction .
Storage
Container and Environment: Store DMDEE in airtight glass or aluminum containers to prevent moisture absorption and oxidation. Maintain temperatures between 5-25°C in a dry, well-ventilated area.
Hazard Mitigation: Avoid contact with strong bases (which can cause decomposition) and metal ions (e.g., copper, iron), as these can catalytically degrade the molecule. Proper storage preserves catalyst activity and extends shelf life.
Shelf Life: Guaranteed for 18 months when stored under recommended conditions, after which re-testing is advised to confirm performance .
Parameter | Value |
Appearance | Colorless to light yellow liquid |
Purity | ≥99% (GC) |
Density (25°C) | 0.98 g/cm³ |
Viscosity (25°C) | 18 mPa·s |
Flash Point | 110°C (TCC) |
Boiling Point | 250°C |
DMDEE (CAS No. 6425-39-4) is a high-performance amine catalyst celebrated for its selective activation of isocyanate-water reactions—a critical process in moisture-cured polyurethane (PU) systems. With a molecular formula of C₁₂H₂₄N₂O₂ and a molecular weight of 228.33 g/mol, this low-odor liquid (density 0.98 g/cm³) delivers excellent stability in one-component formulations, where curing relies on atmospheric moisture. Its unique morpholine-derived structure makes it indispensable in construction adhesives, textile coatings, and medical devices, where it combines fast curing with superior mechanical properties and regulatory compliance.
Moisture-Sensitive Catalysis
DMDEE’s structure enables targeted activation of water-induced cross-linking in one-component PU sealants and adhesives, a key advantage in applications where on-demand curing is critical. Under 50% relative humidity (RH) conditions, it achieves tack-free times ≤ 10 minutes—significantly faster than traditional catalysts like DMEA (dimethylaminoethanol). In polyurethane foams, this translates to a 40% reduction in cure time, accelerating production cycles without sacrificing foam quality .
Low Volatility and Odor
With volatile compound emissions of ≤5 ppm, DMDEE meets the strictest indoor air quality requirements, making it suitable for indoor applications such as acoustic panels (used in offices and schools) and medical-grade foams (for hospital mattresses and wheelchair cushions). Its low odor profile also enhances worker comfort during manufacturing, reducing the need for specialized ventilation systems .
Thermal and Chemical Resistance
DMDEE exhibits excellent stability in high-temperature environments (up to 150°C), ensuring long-term performance in applications like engine compartment sealants and industrial oven coatings. It also resists degradation in aggressive chemical media, including oils, greases, and weak acids, making it ideal for industrial coatings exposed to harsh operating conditions. This resistance extends the service life of coated components by up to 30% compared to products using less stable catalysts .
Sustainable Formulation
DMDEE supports green manufacturing initiatives, being compliant with FDA (Food and Drug Administration) regulations for indirect food contact and EU Cosmetics Regulation (EC 1223/2009) for personal care applications. It is non-toxic (LD50 > 2000 mg/kg in rat oral tests) and biodegradable (80% degradation in 28 days per OECD 301B), aligning with corporate sustainability goals and eco-label requirements .
Construction and Infrastructure
Sealants and Adhesives: DMDEE enhances elongation at break (≥400%) in PU joint sealants used in bridges, airports, and commercial buildings. These sealants maintain flexibility across temperature extremes (-40°C to 80°C) and exhibit excellent resistance to UV radiation and weathering, reducing maintenance costs over time .
Floor Coatings: In polyurethane self-leveling floor systems, DMDEE improves abrasion resistance, with Taber abrasion loss ≤ 50 mg/1000 cycles—a key metric for high-traffic areas like warehouses, shopping malls, and manufacturing facilities .
Textile and Apparel
Waterproof Coatings: For outdoor fabrics (e.g., tents, rain jackets), DMDEE promotes cross-linking in PU-based water-repellent coatings, achieving a hydrostatic head ≥ 5000 mm—indicating resistance to water penetration under pressure. This ensures long-lasting waterproof performance even after repeated washing .
Sportswear: In athletic shoes and compression gear, DMDEE enhances elastic recovery in microcellular foams, reducing compression set by 15%. This maintains cushioning properties during intense physical activity, improving comfort and performance .
Medical and Consumer Goods
Medical Devices: DMDEE ensures sterility compatibility in PU-based catheters, wound dressings, and implants, passing cytotoxicity testing (ISO 10993)—a critical requirement for biocompatible materials. Its low leachability also minimizes adverse reactions in patients .
Consumer Electronics: In smartphone cases, tablet covers, and wearable devices, DMDEE improves shock absorption in microcellular foams, achieving impact resistance ≥ 5 J. This protects devices from damage during accidental drops, enhancing product durability and user satisfaction .
Storage
Container and Environment: Store DMDEE in airtight glass or aluminum containers to prevent moisture absorption and oxidation. Maintain temperatures between 5-25°C in a dry, well-ventilated area.
Hazard Mitigation: Avoid contact with strong bases (which can cause decomposition) and metal ions (e.g., copper, iron), as these can catalytically degrade the molecule. Proper storage preserves catalyst activity and extends shelf life.
Shelf Life: Guaranteed for 18 months when stored under recommended conditions, after which re-testing is advised to confirm performance .
Parameter | Value |
Appearance | Colorless to light yellow liquid |
Purity | ≥99% (GC) |
Density (25°C) | 0.98 g/cm³ |
Viscosity (25°C) | 18 mPa·s |
Flash Point | 110°C (TCC) |
Boiling Point | 250°C |
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