Overview
JEFFAMINE T-403 is a trifunctional primary amine characterized by repeating oxypropylene units in its backbone, with an average molecular weight of approximately 440. Its amine groups are located on secondary carbon atoms at the ends of aliphatic polyether chains. As one of the recommended international brand products in our auxiliary agent range, it is supplied with supply chain resource support for formulators sourcing a trifunctional polyetheramine for epoxy curing and polyurethane anti-sag applications.
Key Benefits of JEFFAMINE T-403
- Trifunctional primary amine with repeating oxypropylene backbone units
- Average molecular weight of approximately 440
- Low color and low vapor pressure
- Completely miscible with a wide variety of solvents, including water
- Improves flexibility and strength in cured systems
Applications
JEFFAMINE T-403 is primarily evaluated as an epoxy curing agent and as an anti-sag agent for polyurethanes, supporting formulation work across paints and coatings, adhesives and sealants, and other applications where a trifunctional amine curing chemistry is needed. Its trifunctional structure allows it to build crosslink density in epoxy systems, while its polyether backbone contributes flexibility to the cured network, a combination that formulators in building and construction, automotive, marine, and electrical and electronics end markets commonly evaluate for coating, adhesive, and sealant systems.
Why Trifunctionality and Low Vapor Pressure Matter
In epoxy curing systems, the number of reactive amine sites per molecule directly affects crosslink density and, in turn, the hardness, chemical resistance, and thermal performance of the cured film. Because this polyetheramine is trifunctional, it can contribute more crosslinking per molecule than a difunctional amine of similar backbone chemistry, which is one reason formulators evaluate it when a cured epoxy system needs both flexibility, from the oxypropylene backbone, and structural integrity, from the additional reactive sites.
Low vapor pressure and low color are also practical considerations for formulators working in enclosed production environments or with light-colored or clear end products, since a curing agent with higher vapor pressure can create workplace air quality concerns, and a curing agent with poor color stability can discolor a finished coating or adhesive over time. Formulators should always confirm current amine value, viscosity, and recommended stoichiometric ratios against the latest technical data sheet for their specific formulation.
What to Consider When Sourcing JEFFAMINE T-403
When sourcing a trifunctional polyetheramine for epoxy curing or polyurethane anti-sag applications, formulators typically evaluate amine functionality, molecular weight, water miscibility, and compatibility with the resin or polyurethane system already in use. Working with a supplier that can provide consistent documentation and responsive technical support can help reduce qualification time when approving a new curing agent for a coatings, adhesives, or sealants production line.
Because JEFFAMINE T-403 is completely miscible with a wide variety of solvents, including water, formulators working across solvent-borne, water-based, and solvent-free systems should confirm current solubility and compatibility data against the latest technical data sheet, rather than assuming identical performance across every solvent system.
General Handling and Storage Guidance
As with most reactive amines, this product should be kept in tightly sealed original containers, stored in a cool, dry, well-ventilated location away from incompatible materials, and used within the manufacturer’s recommended shelf life. Because it is a reactive primary amine, containers should be kept away from strong oxidizers and handled according to the current SDS.
Shelf life and specific storage recommendations vary by batch and packaging format, so formulators should always confirm current shelf life, recommended storage conditions, and any handling precautions against the latest technical data sheet and SDS for the specific batch of this polyetheramine they are working with.
How This Polyetheramine Performs Across Epoxy Curing and Anti-Sag Roles
As an epoxy curing agent, this polyetheramine contributes crosslink density and flexibility to the cured film, which formulators weigh against hardness and chemical resistance requirements for their specific coating, adhesive, or sealant application. As an anti-sag agent for polyurethanes, it is instead evaluated for how it modifies rheology and flow behavior during application, helping control sag on vertical surfaces without necessarily forming the same type of crosslinked network as in an epoxy system.
Because it is positioned across both of these roles, formulators evaluating it for a new epoxy or polyurethane system should confirm which function, curing agent or anti-sag additive, is the priority for their formulation, since dosage and stoichiometry recommendations differ between the two use cases.
Where to Source This Product
Thousands Chemicals connects formulators with JEFFAMINE T-403 and related auxiliary agent products through our digital B2B marketplace. Amine functionality and curing performance are commonly evaluated using test methods published by organizations such as ASTM International. Our team can help confirm packaging, lead times, and technical documentation for your target application and order volume.
Documentation We Can Provide
For buyers evaluating this polyetheramine for a new epoxy curing or polyurethane anti-sag formulation, our team can help arrange the current technical data sheet and safety data sheet. Having this documentation in hand before finalizing a formulation can help avoid delays later in your qualification or approval process.
FAQ
What is JEFFAMINE T-403 used for?
It is primarily evaluated as an epoxy curing agent and as an anti-sag agent for polyurethane formulations.
Is JEFFAMINE T-403 water miscible?
Yes, it is completely miscible with a wide variety of solvents, including water.
What is the molecular weight of JEFFAMINE T-403?
This polyetheramine has an average molecular weight of approximately 440, with amine groups located on secondary carbon atoms at the ends of aliphatic polyether chains.
Does JEFFAMINE T-403 improve flexibility in cured systems?
Yes, its oxypropylene backbone helps improve flexibility and strength in cured epoxy and polyurethane systems.
Can you provide technical documentation and bulk pricing?
Yes, technical data sheets and SDS documentation are available on request, and our team can provide bulk pricing and lead times based on your target volume and delivery location.
Get a Quote for JEFFAMINE T-403
Contact our team for a quote, technical data sheet, or SDS for this polyetheramine. We support bulk supply and global shipping for formulators sourcing trifunctional amine curing agents for epoxy and polyurethane systems.
