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, 1:1 mix, black encapsulant with good flame resistance
Unit of Measure

Specifications

Type

 N/A Primerless Silicone Encapsulants

Mix Ratio

 N/A 1:1

Color

 N/A Black

Viscosity

 N/A 1540 mPa/s

Durometer

 N/A 59 (Shore 00)

Specific Gravity

 N/A 1.23

Working Time at Room Temperature

 N/A > 3 days

Flammability Classification

 N/A 94 V-0

UL Temperature Index, Electrical/Mechanical

 N/A 105/105 ºC

Unprimed Adhesion Lap Shear

 N/A 140 psi1.0 N/cm²10 kgf/cm²

Thermal Conductivity

 N/A 0.30 W/m·K7.2 x 10-4 cal/cm·s-ºC

Linear Coefficient of Thermal Expansion

 N/A 300 ppm

Shelf Life from Date of Manufacture

 N/A 24 months

Military Specification

 N/A MIL-PRF-23586F (Grade B2)

Type, Class, Group

 N/A Type I, Class IV QPL

Dielectric Strength

 N/A 525 V/mil21 kV/mm

Dielectric Constant at 100 Hz

 N/A 2.85

Dielectric Constant at 100 kHz

 N/A 2.79

Dissipation Factor at 100 Hz

 N/A 0.008

Dissipation Factor at 100 kHz

 N/A 0.002

Volume Resistivity

 N/A 2.1 x 1015 O/cm

Features

N/A
1:1 mix ratio; flowable; self-priming; heat cure; UL recognized; Mil Spec approved

Potential Uses

N/A
Low cost primerless adhesion encapsula tion applications

Application Methods

N/A
Supplied as two-part liquid component kits comprised of Part A/Part B to be mixed in a 1:1 ratio by weight or volume; automated or manual mixing and dispensing can be used

Cure

N/A
120 minutes at 100 ºC (212 °F)
60 minutes at 125 °C (257 °F)
15 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.