Era Polymers Pty. Ltd.
2-4 Green Street, Banksmeadow
Sydney, NSW 2019 Erapol ETL65A
AUSTRALIA
www.erapol.com.au
POLYETHER (PPG) TDI PREPOLYMER
TECHNICAL DATASHEET
Erapol ETL65A is a liquid isocyanate terminated pre‐polymer based on PPG polyol.
Having a PPG backbone means that this polymer is considerably cheaper than polymers made
from PTMEG.
Additionally ETL65A can be blended with premium grade compounds to product formulations to
intermediate performance/cost.
Applications
Generally used in applications where the outstanding properties of PTMEG based materials are
not needed.
Product Specification
% NCO 2.85 ± 0.2
Specific Gravity at 25°C 1.06
Viscosity at 80°C (cps) 100 ‐ 500
Colour Amber
Mixing and Curing Conditions
ETL65A / MOCA ETL65A / Ethacure 300
Erapol ETL65A (pph) 100 100
MOCA Level (pph) 8.6 ‐
Ethacure 300 Level (pph) ‐ 6.9
Recommended % Theory 95 95
Erapol Temperature (°C) 75 ‐ 85 60 ‐ 70
Curative Temperature (°C) 100 20 ‐ 30
Pot Life (mins) 25 20
Demould Time at 100°C (hrs) 2 2
Post Cure Time at 100°C (hrs) 16 16
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 their own application.
Version 2.0 Date of Issue: 11 April 2017 Page 1 of 2
Physical Properties
Properties are to be used as a guide and not intended for specification purposes.
ETL65A / MOCA ETL65A / Ethacure 300 TEST METHOD
Hardness (Shore A) 65 ± 3 66 ± 3 AS1683.15
Tensile Strength MPa (psi) 8.0 (1160) 5.0 (525) AS1683.11
100% Modulus MPa (psi) 2.1 (305) ‐ AS1683.11
300% Modulus MPa (psi) 4.4 (638) ‐ AS1683.11
Elongation (%) 1100 800 AS1683.11
Angle Tear Strength, Die C (kN/m) 30 25 AS1683.12
Trouser Tear Strength (kN/m) 9 7 AS1683.12
DIN Resilience (%) 45 48 DIN53512
3
DIN Abrasion Resistance 10N(mm ) 165 150 AS1683.21
3
DIN Abrasion Resistance 5N (mm ) 52 53 AS1683.21
Compression Set / 22 hr at 70°C (%) 45 ‐ AS1683.13
Cured Specific Gravity (g/cm3) 1.08 1.08 AS1683.4
Processing Procedure
1. Erapol ETL65A should be heated to the recommended processing temperature and
thoroughly degassed at ‐95 kpa of vacuum until excessive foaming stops.
2. The curative should be added to ETL65A, the MOCA must first be melted at 110 ‐ 120°C prior
to mixing and Ethacure 300 processed at room temperature. After adding the curative, mix
thoroughly, being careful not to introduce air into the mixture.
3. Pour mixed materials into moulds that have been preheated to 80 ‐ 100°C and pre‐coated
with release agent.
Adhesion
Adhesion of Erapol based elastomers to various substrates is at best marginal if a primer is not
used. Please consult Era Polymers for specific recommendations to improve adhesion.
Handling Precautions
Erapol ETL65A contains small amounts of free TDI. Therefore the product should be used in
well‐ventilated areas. Avoid breathing in vapours and protect skin and eyes from contact.
In case of skin contact, immediately remove excess, wash with soap and water. For eye contact,
immediately flush with water for at least 15 minutes. Call a physician.
If nose, throat or lungs become irritated from breathing in vapours, remove exposed person to
fresh air. Call a physician.
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 their own application.
Version 2.0 Date of Issue: 11 April 2017 Page 2 of 2
