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< Neuthane 3200/765 - MDI - Ester Rotational Casting Systems (70-80 Shore A)
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| Neuthane 3200 Series |
Neuthane™ 3200/765 - MDI - Ester Rotational Casting Systems (70 - 95 Shore A)
Properties
The Neuthane 3200/765 series are high performance MDI – ester rotational casting systems designed to produce roller coverings for use in arduous application areas.
They offer:
- a high level of physical properties
- good dynamic performance
- very good cut and abrasion resistance
- very good chemical resistance
- non MOCA curatives
- no moulds for processing
- room temperature curing
Typical Applications
- Steel mill rollers (dry applications)
- Paper mill rollers (dry applications)
Processing must be carried out by dispensing machine
- Melt prepolymer at 50-70°C for 12-24 hours
- Heat the prepolymer and curative to the recommended temperature
- Ensure that the curative is thoroughly mixed prior to use
- Degass to remove air
- Dispense at 700-2000g per minute*
- Adjust rotation and traverse speed until a smooth build up is achieved*•
- Cure as recommended
* This will vary depending upon diameter of roller. As a general guide the output rate,rotational and traverse speeds will all increase as the diameter of the roller increases
Processing Considerations
- Avoid prolonged storage of prepolymers at elevated temperatures.
- This will result in low hardness and lower properties of the cured material
- Avoid moisture contamination of all materials
- Part used containers should be flushed with dry nitrogen and resealed immediately after use
- To prevent de-lamination, subsequent layers should be applied within 30 minutes
Alternatives
- Wet / Dynamic Applications - Neuthane 3100 [PTMEG ether] will offer improved performance
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| Neuthane | 3200/765 | 3200/765 | 3200/765 | ||
| Curative | 3270/765 | 3275/765 | 3280/765 | ||
| Mix Ratio: Curative per 100 Parts Resin | by weight | 52.6 | 45.5 | 40.5 | |
| Resin Temperature | °C | 75 | 75 | 75 | |
| Curative Temperature | °C | 40 | 40 | 40 | |
| Recommended Roller Temperature | °C | Room Temperature | Room Temperature | Room Temperature | |
| Viscosity @ 100°C resin
(Viscosity vs. Temp Graphs available on request) |
cps | 800 | 800 | 800 | |
| Pot life (on a 500g mix) | seconds | 20-30 | 20-30 | 20 | |
| Recommended Cure Temperature / Time | °C / hrs | Minimum 20 / 48 | Minimum 20 / 48 | Minimum 20 / 48 | |
| Hardness | DIN 2240-91 | Shore A | 70 | 75 | 80 |
| DIN 2240-91 | Shore D | - | - | - | |
| 100% Modulus | BS 903 Pt A2 - ISO 37 | lb/in²
(Mpa) |
330
(2.3) |
470
(3.2) |
840
(5.8) |
| 300% Modulus | BS 903 Pt A2 - ISO 37 | lb/in²
(Mpa) |
600
(4.1) |
800
(5.5) |
1180
(8.1) |
| Tensile Strength | BS 903 Pt A2 - ISO 37 | lb/in²
(Mpa) |
6300
(43.5) |
6380
(44.0) |
6900
(47.6) |
| Elongation at Break | BS 903 Pt A2 - ISO 37 | % | 600 | 600 | 550 |
| Tear Strength | BS 903 Pt A3 - ISO 34-1 | lb/in
(KN/m) |
300
(52.5) |
350
(61.3) |
410
(71.8) |
| Specific Gravity | g/cm³ | 1.21 | 1.22 | 1.23 | |
| Neuthane | 3200/765 | 3200/765 | 3200/765 | ||
| Curative | 3285/765 | 3290/765 | 3295/765 | ||
| Mix Ratio: Curative per 100 Parts Resin | by weight | 35.2 | 29.3 | 26.7 | |
| Resin Temperature | °C | 75 | 75 | 75 | |
| Curative Temperature | °C | 40 | 40 | 40 | |
| Recommended Roller Temperature | °C | Room Temperature | Room Temperature | Room Temperature | |
| Viscosity @ 100°C resin
(Viscosity vs. Temp Graphs available on request) |
cps | 800 | 800 | 800 | |
| Pot life (on a 500g mix) | seconds | 20 | 15 | 15 | |
| Recommended Cure Temperature / Time | °C / hrs | Minimum 20 / 48 | Minimum 20 / 48 | Minimum 20 / 48 | |
| Hardness | DIN 2240-91 | Shore A | 85 | 90 | 95 |
| DIN 2240-91 | Shore D | - | - | - | |
| 100% Modulus | BS 903 Pt A2 - ISO 37 | lb/in²
(Mpa) |
990
(6.8) |
1200
(8.3) |
1230
(8.5) |
| 300% Modulus | BS 903 Pt A2 - ISO 37 | lb/in²
(Mpa) |
1480
(10.2) |
1800
(12.4) |
1850
(12.8) |
| Tensile Strength | BS 903 Pt A2 - ISO 37 | lb/in²
(Mpa) |
7500
(51.8) |
7300
(50.4) |
7500
(51.8) |
| Elongation at Break | BS 903 Pt A2 - ISO 37 | % | 550 | 550 | 500 |
| Tear Strength | BS 903 Pt A3 - ISO 34-1 | lb/in
(KN/m) |
480
(84.0) |
500
(87.5) |
550
(96.3) |
| Specific Gravity | g/cm³ | 1.23 | 1.24 | 1.26 | |
Information contained in the data is, to the best of our knowledge, true and accurate. Since conditions of use are beyond our control, no warranty is given or implied in respect of any recommendations or suggestions made by ourselves, nor is freedom from patent infringement inferredv3