Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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Item Name: RTV31, RTV60, RTV88
Manufacturer: Momentive Performance Materials
Technologies: High-temperature, two-part silicone rubber elastomers (base + curing agent, typically DBT)
Color: Red
Cure Type: Room temperature cure with adjustable curing agents (e.g., DBT, STO, RTV9811)
Package Size: Contact to Techniq VN for details.
Shelf Life: Contact to Techniq VN for details.
RTV31, RTV60, and RTV88 are high-temperature, two-part silicone rubber compounds supplied as a base with a DBT (dibutyl tin dilaurate) curing agent. They cure at room temperature to form durable, resilient elastomers. The products differ mainly in uncured viscosity, which allows for adjustable work times and cure rates by varying the type or concentration of curing agent. These solvent-free compounds provide excellent adhesion with primer, release properties, and maintain elastomeric properties from -54°C (-65°F) to 260°C (500°F) continuously, and up to 316°C (600°F) for short periods.
Potting and encapsulating electric motors and transformers.
Fabrication of rubber parts and molds for low-melting point metals.
Release applications such as rubber rollers.
Thermal insulation in industrial high-temperature environments.
Suitable for deep section curing, small volume applications, and automated mixing systems.
Before Mixing / Uncured
| Property | RTV31 | RTV60 | RTV88 |
|---|---|---|---|
| Color | Red | Red | Red |
| Consistency | Pourable | Pourable | Spreadable Paste |
| Viscosity (cps) | 25,000 | 47,000 | 880,000 |
| Specific Gravity | 1.42 | 1.48 | 1.47 |
| Work Time @ 25°C (hrs, with 0.5% DBT) | 2 | 2 | 0.75 |
| Cure Time @ 25°C (hrs, with 0.5% DBT) | 24 | 24 | 24 |
After Curing (0.5% DBT, 7 days at 25°C, 50% RH)
| Property | RTV31 | RTV60 | RTV88 |
|---|---|---|---|
| Hardness (Shore A) | 54 | 57 | 58 |
| Tensile Strength (kg/cm² / psi) | 61 (870) | 70 (990) | 59 (830) |
| Elongation (%) | 170 | 120 | 120 |
| Tear Strength (kg/cm / lb/in) | 5 (29) | 7 (40) | 8 (42) |
| Shrinkage (%) | 0.6 | 0.6 | 0.6 |
| Dielectric Strength (kV/mm / v/mil) | 17 (430) | 17.7 (450) | 17.4 (440) |
| Dielectric Constant @ 1000 Hz | 4.4 | 4.0 | 4.3 |
| Dissipation Factor @ 1000 Hz | 0.03 | 0.02 | 0.03 |
| Volume Resistivity (ohm-cm) | 1.6×10¹⁴ | 4.4×10¹⁴ | 2.8×10¹⁴ |
| Useful Temperature Range (°C) | -54 to 260 | -54 to 260 | -54 to 260 |
| Thermal Conductivity (W/m·K) | 0.31 | 0.31 | 0.31 |
| Coefficient of Expansion (cm/cm°C) | 20×10⁻⁵ | 20×10⁻⁵ | 20×10⁻⁵ |
| Specific Heat (cal/g°C / BTU/lb°F) | 0.35 / 0.35 | 0.35 / 0.35 | 0.35 / 0.35 |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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