Hexamethylene Diamine
CAS Number: 124-09-4
Hexamethylene diamine (HMDA) is the diamine monomer for nylon 66 production and a versatile building block for polyurethane chain extenders, epoxy curing agents, and crosslinker synthesis. HMDA reacts with adipic acid to form nylon 66 salt, which is polymerized to produce nylon 66 fibers and engineering plastics with outstanding mechanical strength and thermal performance.
Technical Specifications
| appearance | White to off-white crystalline solid or flakes |
| purity (%) | ≥99.0 |
| water content (%) | ≤0.1 |
| color (APHA, melt) | ≤10 |
| amine value (mg KOH/g) | 960–980 |
Applications
- Nylon 66 salt and polyamide 66 fiber and engineering plastic production
- Polyurethane chain extender in reactive hot-melt and cast elastomers
- Epoxy resin hardener and curing agent
- HDI (hexamethylene diisocyanate) synthesis precursor
- Crosslinking agent for poly(acrylic acid) and cellulose derivatives
Key Features
- Precisely defined amine equivalent weight for stoichiometric nylon 66 and epoxy curing
- High purity minimizes chain termination defects in polyamide polymerization
- Versatile as both chain extender and crosslinker due to primary amine reactivity
- HDI diisocyanate precursor pathway supports bio-based isocyanate development
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CAS Number
124-09-4
Category
Polymer Synthesis ChemicalsAvailability
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