Robert McKeown Company, Inc.
Robert McKeown Company, Inc.
111 Chambers Brook Road
Branchburg NJ 08876
Toll Free: 1.800.631.1125
Phone: 908.218.9000
Fax: 908.218.8949
Email: sales@robertmckeown.com
Website: www.robertmckeown.com
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2-part, 10:1 mix, transparent encapsulant with good flame resistance
Unit of Measure

Specifications

Type

 N/A Silicone Encapsulants

Mix Ratio

 N/A 10:1

Color

 N/A Clear

Viscosity

 N/A 4575 mPa/s

Durometer

 N/A 48

Specific Gravity

 N/A 1.03

Working Time at Room Temperature

 N/A > 2 h

Flammability Classification

 N/A 94 V-1

UL Temperature Index, Electrical/Mechanical

 N/A 130/130 ºC

Thermal Conductivity

 N/A 0.16 W/m·K3.8 x 10-4 cal/cm·s-ºC

Linear Coefficient of Thermal Expansion

 N/A 325 ppm

Shelf Life from Date of Manufacture

 N/A 24 months

Military Specification

 N/A MIL-I- 81550C

Type, Class, Group

 N/A Type I, QPL

Dielectric Strength

 N/A 350 V/mil14 kV/mm

Dielectric Constant at 100 Hz

 N/A 2.72

Dielectric Constant at 100 kHz

 N/A 2.68

Dissipation Factor at 100 Hz

 N/A 0.0026

Dissipation Factor at 100 kHz

 N/A 0.0013

Volume Resistivity

 N/A 2.9 x 1014 O/cm

Features

N/A
10:1 mix ratio; flowable; room temperature or heat cure; high tensile strength; same as Sylgard* 182 Elastomer but with RT cure capability; UL recognized; Mil Spec approved

Potential Uses

N/A
General potting applications: power supplies, connectors, sensors, industrial controls, transformers, amplifiers, high voltage resistor packs, relays; adhe- sive/encapsulant for solar cells; adhesive handling beam lead integrated circuits during processing

Application Methods

N/A
Supplied as two-part liquid component kits comprised of Base/Curing Agent to be mixed in a 10:1 ratio by weight or volume; automated mixing and dispensing; manual mixing

Cure

N/A
> 48 hours at room temperature
35 minutes at 100 °C (212 °F)
20 minutes at 125 °C (257 °F)
10 minutes at 150 °C (302 °F)

Note: These data were collected on 50–100 gram samples of a lot believed to be typical and should be used as initial estimates of cure times. Times will vary slightly from batch to batch and can be longer or shorter due to thermal mass of your parts and your heating ramp rate. Pretesting is recommended to confirm adequate cure for your application.
For primerless adhesion products, cure time is based on time to reach durometer. Full adhesion may take more time at the cure temperature.