Polyurethane Catalyst QHA-DMDEE Product Data Sheet

Product Name: QHA-DMDEE | Chemical Name: 2,2-Dimorpholinoethylether | CAS No.: 6425-39-4

Product Category: High-Efficiency Tertiary Amine Polyurethane Catalyst | Molecular Formula: C₈H₁₈N₂O₃

EC Number: 229-174-5 | UN Number: 2735 8/PG 3

1. Description

Polyurethane Catalyst QHA-DMDEE (2,2-Dimorpholinoethylether) is a high-efficiency, low-odor tertiary amine catalyst with unique ether-linked morpholine structures. It is a colorless to pale yellow clear liquid with a mild amine odor, featuring excellent catalytic selectivity, strong activity, and good chemical stability. Specifically engineered for polyurethane (PU) foam manufacturing and related industrial applications, QHA-DMDEE is renowned for its balanced catalytic performance and low volatility.

QHA-DMDEE primarily accelerates the gelation reaction (polyol-isocyanate crosslinking) in PU systems while providing moderate promotion for the blowing reaction (isocyanate-water interaction), effectively balancing reaction kinetics to ensure stable foam rise, uniform cell structure, and enhanced mechanical properties of the final product. It exhibits superior compatibility with mainstream PU raw materials, including polyether polyols, polyester polyols, isocyanates, and various auxiliary additives. With its low volatility and low odor characteristics, QHA-DMDEE is especially suitable for products requiring low residual odor, such as indoor and automotive PU foams.

2. Specification

The table below lists the typical physical and chemical properties of Polyurethane Catalyst QHA-DMDEE, complying with industrial quality standards and strict quality control requirements, ensuring consistent product performance across batches:

3. Application

Polyurethane Catalyst QHA-DMDEE is a versatile, high-performance catalyst with broad applicability, mainly focused on polyurethane foam production and other PU-related fields, with core advantages in low odor, strong activity, and balanced reaction control:

• Rigid Polyurethane Foams: Widely used in insulation foam formulations such as building exterior insulation panels, on-site spray foam insulation, refrigeration equipment (refrigerators, freezers) insulation layers, and refrigerated truck insulation. It optimizes cell uniformity, enhances foam thermal insulation performance and mechanical strength, and reduces residual odor.
• Flexible & Semi-Rigid PU Foams: Used as a main or auxiliary catalyst in molded flexible foams (automotive seats, furniture cushions) and semi-rigid foams, adjusting reaction kinetics to improve product flexibility, resilience, and dimensional stability, suitable for low-odor indoor and automotive applications.
• PU Adhesives & Sealants: Applied in polyurethane adhesives and sealants, accelerating curing speed, enhancing bond strength, and improving the product’s resistance to water, oil, and chemicals, suitable for high-performance bonding scenarios.
• Microcellular & Integral Skin Foams: Suitable for microcellular foams (shoe soles, gaskets) and integral skin foams (automotive interior trim, handgrips), promoting fine cell structure and smooth surface finish, ensuring consistent product quality.
• Other PU Products: Used in polyurethane packaging foams, sound insulation foams, and decorative foams, providing stable catalytic performance and ensuring the final product meets relevant quality standards.
• It can be used alone as the main catalyst or blended with other amine catalysts (such as TEDA, DMCHA) to fine-tune reaction rates. The recommended dosage is 0.1–1.0% based on the weight of polyol in PU foam formulations, depending on the specific foam type and performance requirements.

4. Storage & Handling

Storage Conditions

• Store in sealed original containers (25kg/drum, 180kg/drum, 200kg/drum or IBC drum) in a cool, dry, well-ventilated warehouse, away from direct sunlight, heat sources, open flames, and static electricity. The recommended storage temperature is 5–30°C; avoid prolonged exposure to high temperatures (above 40°C) to prevent viscosity change and performance degradation.
• Keep the product isolated from strong acids, oxidizing agents, and moisture to prevent chemical reactions, performance degradation, or contamination. For long-term storage, containers can be filled with nitrogen to avoid oxidation.
• Storage areas must be equipped with spill containment facilities and emergency response materials (adsorption materials, neutralizers such as dilute acetic acid) to handle potential leaks, and comply with local chemical safety and environmental regulations. The product is classified as a corrosive liquid, so corrosion protection measures should be strictly implemented.

Shelf Life & Handling Precautions

• Unopened shelf life: 12 months under recommended storage conditions. Conduct performance testing prior to use if expired. Once opened, use the product within 3 months and reseal tightly after each use to prevent moisture absorption and volatilization.
• Wear appropriate personal protective equipment (PPE) during handling, including chemical-resistant gloves, safety goggles, a protective coat, and anti-static shoes. Operate in a well-ventilated area or fume hood to avoid inhalation of vapors; use an air-purifying respirator for high-concentration operations. The product is corrosive and irritating to skin, eyes, and respiratory tract.
• In case of accidental contact: Flush skin or eyes with plenty of clean water for at least 15 minutes; seek medical attention promptly if irritation persists. In case of leakage, evacuate personnel, cut off fire sources, cover the spill with adsorption materials (such as diatomaceous earth or sand), neutralize with dilute acid if necessary, and dispose of waste in accordance with local hazardous waste regulations.
• Dispose of empty containers and waste liquid properly: clean empty containers thoroughly before disposal, and send waste liquid to a professional hazardous waste treatment agency to avoid environmental pollution. Do not pour directly into water bodies or sewers.

The information provided is based on current technical knowledge and practical application experience. Shijiazhuang Qihong  New Material Technology Co.,Ltd assumes no liability for losses caused by improper storage, handling, or application of the product. Users are recommended to conduct preliminary formulation tests to verify the product’s suitability for specific production processes and comply with all relevant safety regulations. Reference safety data sheet (SDS) for detailed hazard information.