Dow SE 1885 Kit

Dow SE 1885 Kit Datasheet
  • Description for Dow SE 1885 Kit

    Extremely soft to medium hardness, thermal/mechanical shock and vibration damping, excellent dielectric properties, flexible cure schedule, reversion resistant, thick section cure, compatible with automated dispensing equipment, and physical and electrical stability over a wider temperature range than the other types of gels.

    *See Terms of Use Below

    Application Type Seal
    1 Part or 2 Part 2 Part
    Material Form Gel
    Industry Circuits, Smart Meters, Electronics, Optoelectronics
    Manufacturer Dow
    Chemistry Silicone, Solvent-free
    Cure Method Part A/Part B
    Cure Temperature (°C) 20 to 25, 70
    Cure Time (min) 30
    Viscosity (cPs) Low, 400
    Color Clear
    High Temperature Resistance (°C) 200
    Low Temperature Resistance (°C) -80
    Light Refractive Index (RI) High
  • Technical Data for Dow SE 1885 Kit

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 2 Part
    • Material Form
      • Gel
    • Industry
    • Cure Method
      • 2-Part Cure - Part A/Part B
    • Color
      • Clear / Transparent - Clear
    Specifications
    Cure Specs
    Cure Temperature (°C) 20 to 25, 70
    Cure Time (min) 30
    Viscosity (cPs) Low, 400
    Work / Pot Time (min) 60 Test Method
    Mix Ratio 1:1 (by volume)
    Material Resistance
    High Temperature Resistance (°C) 200
    Low Temperature Resistance (°C) -80
    Moisture/Humidity Resistance Moisture/humidity resistance
    Conductivity
    Dissipation Factor 0.00070 Test Method
    Dielectric Strength (V/mil) 432, Excellent
    Dielectric Constant 2.70 Test Method
    Volume Resistivity (O) 4E+14 (ohms/cm)
    Hardness
    Shore A Hardness Soft to Medium
    Flexibility Resilient, Flexible
    Other Properties
    Light Refractive Index (RI) High
    Specific Gravity 0.970 Test Method
    Business Information
    Shelf Life Details Shelf life from date of manufacture for material in the original, unopened container, stored at less than 35°C, unless otherwise noted.;Storage conditions and shelf life (“Use By” date) are indicated on the product label.
    Shelf Life Type from date of manufacture
    Shelf Life (mon) 17
  • Best Practices for Dow SE 1885 Kit

    *See Terms of Use Below

    1. Mixing

      Some gels are supplied in bladder packs that avoid direct air contact with the liquid gel components, allowing use of air pressure over the pack in a pressure pot for dispensing. Do not apply air pressure directly to the liquid gel surface (without the bladder pack) as the gel can become supersaturated with air and bubbling can occur when the material is dispensed and cured. Use of bladder packs prevents bubbling, maintains cleanliness and avoids gel contamination. In general, gels are supplied as two-part products that are mixed in a 1:1 ratio (Parts A and B)

      one-part gels are available that eliminate the need for mixing. Gels can be dispensed manually or by using one of the available types of meter mix equipment. Typically, the two components are of matched viscosities and are readily mixed with static or dynamic mixers, with automated meter-mix normally used for high volume processes. For low-volume applications, manual weighing and simple hand mixing may be appropriate. Inaccurate proportioning or inadequate mixing may cause localized or widespread problems affecting the gel properties or cure characteristics. If possible, the potential for entrapment and incorporation of gas (typically air) should be considered during design of the part and selection of a process to mix and dispense the gel. This is especially important with higher-viscosity and faster-curing gels. Degassing at >28 inches (10-20 mm) Hg vacuum may be necessary to ensure a void-free, protective layer.

    2. Testing

      If a substrate or material is questionable with respect to potentially causing inhibition of cure, a small-scale compatibility test should be run to ascertain suitability in a given application. The presence of liquid or uncured product at the interface between the questionable substrate and the cured gel indicates incompatibility and inhibition of cure. In certain situations, toughened gels may appear fully cured but have reduced or no adhesion. This may result from slight inhibition at the interface.

  • Comparable Materials for Dow SE 1885 Kit

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Work / Pot Time Test Methods
Work / Pot Time Test Method Temperature
60 min Time to double initial viscosity initial mixed viscosity for two-part products at room temperature. This property is sometimes referred to as pot life. 25°C
Dielectric Constant Test Methods
Dielectric Constant Test Method
2.70 Dielectric constant, 1 MHz
Dissipation Factor Test Methods
Dissipation Factor Test Method
0.00070 Dissipation factor, 1 MHz
Specific Gravity Test Methods
Specific Gravity Test Method
0.970 Cured or uncured A & B.