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Millathane® 5004*
(Formerly known as Vibrathane 5004)
A High
Performance Millable Polyurethane Rubber
Millathane 5004 is a peroxide curable polyester
millable urethane rubber. It has excellent processing characteristics and
can be injection molded easily. In addition to excellent abrasion
resistance, Millathane 5004 has the highest stress strain values of all
peroxide cured polyurethanes. The cured stock has excellent tear strength,
excellent low temperature flexibility and resistance to oxygen, ozone, fuels
and oils.
| TYPICAL
POLYMER PROPERTIES |
| Chemical type |
Polyester polyurethane |
| Color/Physical
form |
White to off-white chunks |
| Packaging |
50 lb. (22.7 kg) box |
| Odor |
Faint, characteristic |
| Specific gravity |
1.21 |
Mooney viscosity,
ML(1+4)/100°C) |
50 –
70 |
| Storage stability |
2
years under dry and cool conditions |
 |
| TYPICAL COMPOUND
PROPERTIES |
| Hardness range |
40 –
95 A |
| Tensile strength |
Up to
5000 psi, (35 MPa) |
| Tear
strength |
Up to 350 lb/in (61 kN/m)
(Die C) |
| Ozone
resistance |
Excellent |
| Hydrolysis resistance |
Good (Improved with
carbodiimides) |
| Oil & fuel resistance |
Very Good/Excellent |
| Abrasion resistance |
Excellent |
| Resilience |
40 - 50% |
Processing
Millathane 5004 is processed by techniques which are common to the
rubber industry. Compounds can be mixed on an open mill or in an internal
mixer; molded articles can be produced via compression, transfer or
injection molding; calendered sheets can be press or rotocured.
Properties
Vulcanizates based on Millathane 5004 can be produced in hardnesses ranging
from 40 to 95 Shore A, and offer very good abrasion resistance, excellent
oil resistance, good
low temperature properties and good gas permeability.
Compounding
Millathane 5004 compounds typically contain reinforcing fillers to
meet hardness and mechanical strength requirements, but gum
compounds, with little or no fillers, have good properties. Reinforcing
fillers like silica and small particle carbon black are easily incorporated
into Millathane 5004. Millathane 5004 is peroxide-curable only. Typical
peroxides used include DiCup 40C and Varox DBPH-50. Carbodiimides can be
added at 1-5 parts for improved
hydrolysis resistance.
A
compound with 5 parts of polymeric carbodiimide (Millstab™ P) had excellent retention
of properties after 1 year water exposure.
Vulcanization Conditions
Compounds based on Millathane 5004 are vulcanized at temperatures of 150º -
175ºC, depending on the peroxide used, with typical cure times of 5 to 20
minutes for compression molded lab sheets. Injection and transfer molding
are also being used commercially with Millathane 5004 compounds.
Formulation Example
| Millathane 5004 |
100.0 |
|
| Stearic Acid
|
0.2 |
|
| N330 Black |
25.0 |
|
| DBEEA (TP-95) |
5.0 |
|
| Struktol WB222 |
1.0 |
|
| Polymeric carbodiimide (Millstab™ P) |
2.0 |
|
| DiCup 40C |
5.0 |
|
| |
|
|
| Cured Properties, press cure 16'/160ºC |
| Hardness, Shore A |
70 |
|
| TSE100*, psi (MPa) |
475 |
(3.3) |
| TSE200*, psi (MPa) |
1090 |
(7.5) |
| TSE300*, psi (MPa) |
1950 |
(13.4) |
| Tensile Strength, psi (MPa) |
4100 |
(28.3) |
| Elongation at break, % |
525 |
|
| Tear Die C, lb/in (kN/m) |
314 |
(55) |
| *TSExxx=Tensile Stress at xxx%
Elongation |
| |
|
|
| Bashore resilience, % |
46 |
|
| DIN Abrasion, mm³ loss |
57 |
|
| |
|
|
| Compression set, 22 hr/70ºC, % |
10 |
|
| Compression set, 22 hr/100ºC, % |
36 |
|
| Compression set, 22 hr/125ºC, % |
53 |
|
| |
|
|
| Oven Aging, 70 Hr/100ºC |
|
|
| Hardness change |
+5 |
|
| Tensile strength, % change |
+3 |
|
| Elongation, % change |
-5 |
|
| |
|
|
| IRM 903 Oil Aging, 70 Hr/100ºC |
|
|
| Hardness change |
-3 |
|
| Tensile strength, % change |
-30 |
|
| Elongation, % change |
-37 |
|
| Volume change, % |
2 |
|
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|
|
Please contact us for
additional information:
Millathane®
Customer Service
Nina Manee at (800) 237-7634 x1348 or (727) 573-7676 x1348
Millathane® Technical Service:
Tom Jablonowski at
(800) 237-7634 x1238 or (727) 573-7676 x1238
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