High-Performance Polymer Curative & Chain Extender
4,4′-Methylenebis(2,6-diisopropylaniline) (MDIPA)
CAS Number: 19900-69-7 | Product of Symb ChemTech
Are you looking for a high-efficiency aromatic diamine chain extender that excels in low water absorption and outstanding hydrolytic stability? Symb ChemTech (established in 1999) is a leading global manufacturer of premium polyurethane curatives, fine chemicals, and biochemistry. We proudly supply high-purity 4,4′-Methylenebis(2,6-diisopropylaniline), commonly referred to as MDIPA or M-DIPA, under rigorous quality control standards to meet the demanding requirements of global industrial applications.
MDIPA is highly favored in the engineering of high-performance elastomers, polyurethanes, and epoxies, particularly where environmental resilience and low-temperature flexibility are non-negotiable.
Why Source MDIPA (CAS 19900-69-7) from Symb ChemTech?
- High Purity Profile: Assayed at ≥ 97.0% for predictable reaction kinetics and consistent material properties.
- Optimized Hydrolytic Stability: Confers superior moisture resistance to polymer backbones.
- Excellent Compatibility: Highly effective as a room-temperature curing agent for epoxy resins.
- Two Decades of Expertise: Manufactured by Symb ChemTech, a trusted industry leader since 1999.
Technical Specifications & Chemical Properties
| Property / Parameter | Specification Value / Description |
|---|---|
| Chemical Name | 4,4′-Methylenebis(2,6-diisopropylaniline) |
| Common Synonyms | MDIPA, M-DIPA, Bis(4-amino-3,5-diisopropylphenyl)methane |
| CAS Registry Number | 19900-69-7 |
| Molecular Formula | C25H38N2 |
| Molecular Weight | 366.58 g/mol |
| Assay (MDIPA Content) | ≥ 97.0% |
| Melting Point | 20 – 30 °C |
| Boiling Point | 215 – 218 °C |
| Appearance | Light brown liquid or waxy solid |
Primary Industrial Applications
Because of its unique steric hindrance provided by the bulky isopropyl groups ortho to the amine groups, MDIPA exhibits a controlled, moderate reaction rate. This makes it highly sought after in the following key polymer sectors:
1. Polyurethane Chain Extender
Extensively used as an amine chain extender for cast polyurethane elastomers and Reaction Injection Molding (RIM) systems. It imparts remarkable tensile strength, load-bearing properties, and low temperature resilience.
2. Room-Temperature Epoxy Curing
Acting as a highly efficient hardener/curing agent for epoxy resin applications, MDIPA is especially suited for systems requiring room-temperature curing without compromising structural stability.
3. Heavy-Duty Protective Coatings
Formulators utilize MDIPA in polyurea and polyurethane architectural and industrial protective coatings, ensuring low water absorption and outstanding weathering resistance.
Material Performance Advantages
Polymers formulated using 4,4′-Methylenebis(2,6-diisopropylaniline) exhibit highly desirable mechanical and chemical characteristics:
- Outstanding Hydrolytic Stability: The hydrophobic nature of the isopropyl moieties prevents moisture from attacking vulnerable bonds in the polymer matrices. This means products resist degradation even in continuous contact with water or damp soil environments.
- Ultra-Low Water Absorption: Low moisture pick-up ensures the cured parts retain their dimensional accuracy, electrical insulation, and hardness over extended lifespans.
- Excellent Thermal Resistance: The steric hindrance in the aromatic diamine structure translates to elevated heat deflection temperatures (HDT) and glass transition temperatures (Tg) in structural resins.
Packaging, Storage, and Handling Guidelines
At Symb ChemTech, we prioritize product integrity during global transit and storage. We adhere to strict industrial standards for chemical distribution:
- Standard Packaging: Shipped in high-quality 25 kg plastic drums (custom bulk configurations available upon request).
- Storage Conditions: Store in a cool, well-ventilated, and dry warehouse. Avoid exposure to open flames, direct sunlight, and moisture.
- Shelf Life: Kept in original tightly-sealed containers under proper storage conditions, MDIPA retains its specifications for over 2 years.
Partner with Symb ChemTech for High-Purity MDIPA
Get direct access to competitive pricing, robust supply chains, and technical support directly from a specialty polyurethane additive producer with over 25 years of chemical innovation.
Request a Quote / Contact UsFrequently Asked Questions (FAQ)
A: MDIPA acts primarily as a chain extender in casting and RIM polyurethane systems, and as an amine curing agent (hardener) for epoxy resins, imparting exceptional structural and chemical resistance.
A: The molecular structure has steric hindrance provided by four bulky isopropyl groups surrounding the amine groups. This hinders moisture access, lowering water absorption rates and enhancing water stability in harsh environments.
A: Since its melting point sits between 20 – 30 °C, MDIPA can appear as a light brown liquid at warm room temperatures or shift to a waxy solid in cooler conditions.