Era Polymers Pty. Ltd.
2-4 Green Street, Banksmeadow
Sydney, NSW 2019 Eracure 100
AUSTRALIA
www.erapol.com.au
POLYURETHANE CURATIVE
TECHNICAL DATASHEET
Eracure 100 Curative is an effective curing agent for polyurethane and epoxy resins. It may also
be used as a chain extender for polyurethane and polyurea elastomers, particularly in Reaction
Injection Molding (RIM) and spray applications; as an antioxidant for elastomers, lubricants and
industrial oils; and as a chemical intermediate.
Product Specification
Eracure 100
Chemical name 3,5‐Diethyltoluene‐2,4‐diamine;
3,5‐Diethyltoluene‐2,6‐diamine
Amine number (mgKOH/g) 620 ‐ 640
Molecular Weight 178.28
Content of Free TDA (%) < 0.5
Appearance Light, yellow thick liquid*
Moisture Content (%) < 0.10
Specific Gravity at 20°C 1.22
Viscosity at 25°C (cps) 155
Boiling Point (°C) 308
Pour Point (°C) ‐9
Solubility
Ethanol Miscible
Toluene Miscible
Water 1.0
* Darkens with time and exposure to air.
Processing
Eracure 100 is a liquid that is ready for immediate use. Loading can be accomplished with simple
hand pumps or gravity feed. Dry nitrogen should be used to blanket curative tanks.
This information is of general nature and is supplied without recommendation of guarantee. It does not make claim to be free from patent
infringement. Properties shown are typical and do not imply specification tolerances. Era Polymers cannot accept liability for loss or damage
through use. Whilst these technical details are based on expert knowledge, practical experience and laboratory testing, successful application
depends upon the nature and conditions in which the products are supplied. Users must, by comprehensive testing, evaluate this product in
Version 1.0 Date of Issue: 25 January 2017 Page 1 of 2
% Theory
Selection of 95% theory is generally recommended. Lowering it to 85% theory will improve
compression set and raise 300% modulus (tensile). Increasing to 105% theory will enhance tear
strength and elongation.
Mix Ratio
The following equation calculates the amount of Eracure 100 required for 100 parts (by weight)
of prepolymer.
%NCO 2.13 %Theory = Eracure 100 pph
%Theory is expressed as a decimal, i.e. 95% theory is 0.95 for the calculation.
Mould temperature and Post Cure
Mould temperature is generally higher than mix temperature. Moulds should be preheated
between 80 ‐ 100°C and maintained at that temperature during cure. Demould time will vary
with prepolymer and part size.
The recommended post cure conditions for TDI polyether and polyester prepolymers are 16
hours at 100°C. Prepolymers based on TDI/PTMEG (high performance ERAPOLS) may require
shorter post cure periods.
Storage and Handling
Eracure 100 is stored in sealed containers and protected from moisture and oxidation by dry
nitrogen. Although the product is not particularly hygroscopic, containers should not be left
open to the atmosphere. Chemical stability is excellent under normal conditions, but storage in
areas of excess heat and/or high humidity should be avoided. Flush an opened container with
dry nitrogen before resealing.
Health and Safety
Use caution when handling Eracure 100 as with any aromatic diamine.
Always wear suitable gloves and glasses when handling. Use in a well ventilated area.
Please consult the MSDS for further information.
This information is of general nature and is supplied without recommendation of guarantee. It does not make claim to be free from patent
infringement. Properties shown are typical and do not imply specification tolerances. Era Polymers cannot accept liability for loss or
damage through use. Whilst these technical details are based on expert knowledge, practical experience and laboratory testing, successful
application depends upon the nature and conditions in which the products are supplied. Users must, by comprehensive testing, evaluate
Version 1.0 Date of Issue: 25 January 2017 Page 2 of 2
