Dytek® A amine (2-methylpentamine-1,5-diamine) is a methyl-branched diamine renowned for its unique reactivity in disrupting crystallinity, making it invaluable in diverse applications. From high-temperature nylon and polyamides to polyurethane chain extenders and epoxy hardeners, its differential reactivity proves indispensable. Moreover, it finds utility in crucial areas like water treatment, corrosion inhibition, and metalworking fluids, where amine functionality and pH control are pivotal. Notably, Dytek® A boasts a commendable 93% recycled content, emphasizing its commitment to sustainability while delivering exceptional performance across a spectrum of applications.

Chemical Name: 2-Methylpentamethylenediamine

CAS Number: 15520-10-2

Functions: Buffers & pH Stabilizer, Chain Extender, Corrosion Inhibitor, Curing Agent, Stabilizer

Chemical Family: Amines, Diamines

Synonyms: 2-methylpentane-1,5-diamine, 2-methylpentanediamine

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Identification & Functionality

Chemical Family
Fluids & Lubricants Functions
Plastics & Elastomers Functions
EC No.
Molecular Structure

INVISTA Dytek A Molecular Structure

Features & Benefits

Applications & Uses

Compatible Polymers & Resins
Compatible Substrates & Surfaces
Fluids & Lubricants Type
Adhesive & Sealant Type
Coating Type
Fluids & Lubricants End Use
Plastics & Elastomers Processing Methods
Epoxy Curatives

Epoxy resins cured with Dytek® amines have excellent properties for use in coatings, civil engineering, adhesives, marine, and composite applications. 

Features Typical Applications
  • Low viscosity vs. IPDA
  • Chemical resistance
  • Highest Tg of all Dytek® Amines
  • Tank linings with chemical exposure
  • High temperature applications
  • Wind turbine blades
  • High-performance composite parts
Applications & Uses
  • Polyamide plastics, films, and fibers
  • Polyamide adhesive and ink resins
  • Corrosion inhibitor
  • Epoxy curing agents
  • Water treatment chemicals
  • Metalworking Fluids
  • Isocyanates
  • Chain extenders (Polyurethanes)
Epoxy Applications

Industrial and Marine Coatings:

DYTEK® A amine provides good metal adhesion, chemical & corrosion resistance, and toughness for demanding industrial and marine applications.

Decorative Coatings:

DYTEK® A amine imparts a high gloss, low blush, uniform finish and improves UV stability compared to alternative amines.

Low Temperature Curative:

DYTEK® A amine’s low viscosity and fast cure rate make it an excellent choice for low temperature application and curing.


When used with slower curatives like polyether- or cyclo-aliphatic amines, small amounts of DYTEK® A amine can reduce gel time while maintaining key mechanical properties of final product.

Polyurethane and Polyurea

DYTEK® A amine is used as a chain extender in polyurethane applications. Differential reactivity due to the methyl substituent influences cross-linking and crystallinity.

DYTEK® A amine derivatives such as secondary amines, aspartic esters, ketoimines and aldimines can be used as curatives in polyurea systems.

The diisocyanate from DYTEK® A amine can impart unique properties to elastomer and sealant formulations.

Hot Melt Adhesives

DYTEK® A amine can be used as an alternative to hexamethylene diamine to lower melting point, improve thermal stability and flexibility, and allow for more open time. Aldimine derivatives can be used in moisture-cured polyurethane reactive hot melts.

Other Applications

Neutralizing or Buffering Agent:

Typically does not produce insoluble salts.

Metalworking Fluids:

Suppresses iron and amine discoloration, improves corrosion resistance and provides effective pH control, extends life by reducing formation of dark color and sediment.

High Performance Polyamides

DYTEK® A amine acts as a crystallinity disruptor, making polymers more amorphous and slower to crystallize. Potential benefits include lower melting point, improved surface appearance, reduced gelling, reduced melt and quench temperatures, reduced water absorption, improved dye uptake, and increased abrasion resistance.

In addition, DYTEK® A amine may allow for more versatility in polymer composition such as reducing the amount of isophthalic acid needed to maintain transparency or reducing total cost by allowing use of lower cost acids, such as terephthalic acid.


Physical Form
Clear and free of suspended materials
Miscible In
Typical Properties
ValueUnitsTest Method / Conditions
2-Ethyltetramethylenediamine Content0.3wt%
Refractive Index (25°C, nD)1.4588
2-Methylpentamethylenediamine Content99wt%
Amine Equivalent Weight58
Amine Value967mgKOH/g
Boiling Point192 (378)°C (°F)
Critical Pressure (Pc)35.3atm
Critical Temperature (Tc)383°C
Critical Vapourization (Vc)424mL/g·mol
Flash Point83 (181)°C (°F)Closed Cup
Freezing Range-56 to -60 (-68 to -76)°C (°F)
H-Equivalent Weight29
Hansen Solubility Parameters (H-Bonding)5.5
Hansen Solubility Parameters (Nonpolar)8.2
Hansen Solubility Parameters (Overall)10.4
Hansen Solubility Parameters (Polar)3.1
Heat of Combustion (∆Hc)9100cal/g
Heat of Vaporization (∆Hv at 193°C)92.8cal/g
Methylcyclopentanediamine Content0.6wt%
Molecular Weight116.2
Partition Coefficient (Kow)0.8
pH (5% Aqueous Solution at 25°C)12.1
pKa1 (at 25°C (77°F))11.2
pKa2 (25°C (77°F))10
Specific Gravity (at 25°C (77°F))0.86
Surface Tension (at 24°C (77°F))34.9dyn/cm
Viscosity (at 22.6°C (73°F))2.63cP

Technical Details & Test Data

Vapor Pressure of Dytek® A amine

INVISTA Dytek A Vapor Pressure of Dytek A amine

Aspartic Esters

INVISTA Dytek A Aspartic Esters

Packaging & Availability

Packaging Information
Railcar Net Weight : 140,000/63,500 (lbs/kg)
Tank truck Net Weight : 42,000/19,000 (lbs/kg)
ISO containers Net Weight : 40,000/18,100 (lbs/kg)
Steel Drums Net Weight : 375/170 (lbs/kg)

Store DYTEK® A amine under nitrogen padding. Extended storage of DYTEK® A amine in unlined carbon steel vessels may cause color formation. Teflon® fluoropolymer or graphite is preferred for gaskets and packings.