Eracast RT70A is a medium performance cold castable polyurethane elastomer. The product is free from MOCA (methylene-bis-ortho-chloroaniline) and flammable solvents, which produces an economical elastomer with good toughness and high elongation and good chemical resistance.
It offers advantages in that it can be readily processed and cured at room or elevated temperatures. The convenient mix ratio and low viscosity allow for easy processing.
Applications
Flexible moulds, concrete moulds and stamp pads, cast in place linings, sound dampening applications and casters.
Product Specifications
Flexible moulds, concrete moulds and stamp pads, cast in place linings, sound dampening applications and casters.
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| Viscosity at 25°C (cps) |
4700 – 5300 |
360 – 600 |
| Appearance |
Clear, Light Amber |
Clear, Amber |
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| Polyol Curative (B) |
65 (pbw) |
| Prepolymer (A) Temperature |
25 30°C |
| Curative (B) Temperature |
25 30°C |
| Mixed Viscosity at 25°C |
2000 – 4000 (cps) |
Pot Life at 25°C
(Based on 200 grams sample) |
12 – 18 mins |
| Cure at 25°C |
24hrs at 25°C will result in an 80% cure. Fully cured att 7 days at 20°C.
Alternatively a 70°C cure for 4-6 hrs will result in 80% cure.
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Eracast RT70A can be mixed by hand or readily processed through suitable polyurethane dispensing equipment.
Note: Both part A and B components are moisture sensitive. Once opened, containers should be purged with nitrogen, if they are to be stored for a period of time.
Processing Procedure
- Carefully weigh the correct proportions of the two components together in one container, mix thoroughly. Be careful not to entrap air while mixing.
- Pour the mixed material into moulds that have been prepared with release agent, being careful to avoid trapping air.
- Allow casting to cure before demoulding.
Handling Precautions
Eracast RT70A should be used in a well-ventilated area. 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.
