Era Polymers
Pty. Ltd.
A.B.N. 14 003 055 936
erapol@erapol.com.au
www.erapol.com.au
SYDNEY
25-27 Green St,
East Botany NSW 2019
Phone: (02) 9666 3788
Fax: (02) 9666 4805
MELBOURNE
David Parker
Mobile: 0412 181 405
Fax: (03) 9754 1854
Victor Pilati
Mobile: 0412 265 499
Fax: (03) 8300 0199
BRISBANE
Peter Holland
Mobile: 0412 171 167
Fax: (07) 3264 3744
SINGAPORE
H.K. Moey
9 Elias Terrace,
Singapore 519772
Phone: +65 6582 8103
Mobile: +65 9751 0026
RN 3038
TECHNICAL DATA
HIGH PERFORMANCE POLYESTER BASED
POLYURETHANE
RN 3038 is a polyester based urethane prepolymer. Finished elastomers are formed by reacting the
prepolymer with di and multi functional amines or polyols to yield high molecular weight
thermosetting polymers.
RN 3038 elastomers provide properties generally not available in rubbers, plastics or metals and
have improved solvent and oil resistance and better thermal stability than most other "general
purpose" rubbers and plastics. Other outstanding properties include high abrasion and tear
resistance, excellent load-bearing capacity, toughness and resiliency.
RN 3038 is a unique engineering material that 'provides the materials engineer with the building
blocks to meet specific requirements for his particular application. Through proper selection of a
curative and a careful balancing of the stoichiometric ratio, the engineer can control such qualities
as tensile and tear strength, abrasion resistance, oil and solvent resistance, load bearing and
resiliency.
Typical applications include soft, solvent resistant printing rolls, metal forming pads, seals, gaskets,
impellers, etc.
PRODUCT SPECIFICATIONS
Colour Clear, Light Amber
% NCO
25C 70C 100C
Brookfield Viscosity (cps) Soft Solid 3500 1000
Specific Gravity 1.24 1.20 1.20
TYPICAL CURED PROPERTIES
Properties presented below are average, based on several determinations and are not intended for
specification purposes.
RN 3038 /
Isonol 93
RN 3038 / Moca
Hardness (Shore A) 52 + 5 82 + 5
Tensile Strength (MPa) 24.8 52.4
100% Modulus (MPa) 1.2 4.1
200% Modulus (MPa)
300% Modulus (MPa) 1.6 7.9
Elongation (%) 540 750
Resilience (DIN) (%) - -
Abrasion (DIN) (mm
3
) - -
Angle Tear Strength (DIE C) (kN/m) 140 425
Trouser Tear Strength (DIE C) (kN/m) - -
Compression Set (Method B) (%) 3 14
Cured Density (g/cm
3
) 1.23 1.25
Version: 4 Date of Issue: 16/12/2002 Page 1 of 2
RN 3038
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.
Era Polymers
Pty. Ltd.
A.B.N. 14 003 055 936
erapol@erapol.com.au
www.erapol.com.au
SYDNEY
25-27 Green St,
East Botany NSW 2019
Phone: (02) 9666 3788
Fax: (02) 9666 4805
MELBOURNE
David Parker
Mobile: 0412 181 405
Fax: (03) 9754 1854
Victor Pilati
Mobile: 0412 265 499
Fax: (03) 8300 0199
BRISBANE
Peter Holland
Mobile: 0412 171 167
Fax: (07) 3264 3744
SINGAPORE
H.K. Moey
9 Elias Terrace,
Singapore 519772
Phone: +65 6582 8103
Mobile: +65 9751 0026
Version: 4 Date of Issue: 16/12/2002 Page 2 of 2
RN 3038
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.
MIXING AND CURING RECOMMENDATIONS
Isonol 93 Moca
RN 3038 (3.2% NCO) (pbw) 100 100
Isonol 93 (pbw) 6.7 -
MOCA (pbw) - 9.5
Recommended % Theory 95 90
Polymer Temperature (C) 80 100 80 100
Curative Temperature (C) 25 25 120 120
Initial Mixed Viscosity at Mix Temperature (cps) 3000 900 2300 800
Pot Life (minutes) 240 120 8.5 6
Demould Time @ 100C (hours) 5 5 0.5 0.5
Post Cure Time @ 100C (hours) 16 16
RECOMMENDED PROCESSING PROCEDURE
1. Heat pre-weighed amounts of RN-3038 to 80-100C and degas at 1-5 mmHg of vacuum for at
least 5 minutes or until excessive bubbling stops. Containers should be unlined metal, plastic or
glass and should be large enough to allow for foaming during degassing.
2. When adding MOCA to RN-3038, the MOCA must be melted at 120C prior to mixing. Isonol
93 is a liquid at room temperature and does not require preheating prior to mixing with RN-3038.
After adding curative, mix thoroughly and degas at 1-5 mmHg for 1 to 2 minutes.
3. Pour mixed system into moulds, preheated to 80C, that have been coated with ERALEASE
mould release or equivalent.
4. Cure in accordance with above recommendations.
5. Automatic metering and mixing equipment can be used with all the RN-3038 systems.
USE OF DIFFERENT CURATIVES
Several other commercially available curatives can be used with RN-3038 polymer. For further
details contact Era Polymers Technical Department.
Isonol 93 can be used with Sanitizer 160 (plasticiser) to lower the hardness below 52 Shore A.
Typically the plasticiser is mixed into the prepolymer, followed by the addition of the curative. It
is good practice to add a suitable catalyst such as ERACAT (0.5 to 1.0 pbw) to aid curing. The
following formulations will give a guide to the hardness.
Sanitizer 160 (pbw) Hardness (Shore A)
30 40
40 35
50 30
60 25
70 20
80 15
For further details contact Era Polymers Technical Department.
