General 
Because of the large number of individual compounds that can be formulated
using each type of elastomer, we have chosen not to list specific properties
such as "swell", "change in compression modulus", etc. which would have
to be listed on a compound by compound basis, as it is doubtful if an engineer
would encounter the exact formulations we used in our tests. Instead we
ran tests on a number of the more common formulations for each type of
elastomer and have based the following list on the general compatibility
of Stabilant 22 and its dilution's with that group of compounds.
|
Elastomer Type
|
S-22 Alone
|
+Isopropylene
|
+Trichloro- ethylene
|
+Flurocarbon
|
|
Butadiene
|
Fair
|
Fair
|
Poor
|
-------------------
|
|
Buna S
|
Good
|
Fair
|
Poor
|
Good
|
|
Butyl
|
Good
|
Good
|
Poor
|
Fair
|
|
Ethylene-Propylene
|
Good
|
Good
|
Poor
|
Good
|
|
Hypalon
|
Good
|
Good
|
Poor
|
Fair
|
|
Fluorocarbon
|
Good
|
Good
|
Poor
|
Fair
|
|
Fluorosilicone
|
Fair
|
Fair
|
Fair
|
-------------------
|
|
lsoprene
|
Good
|
Good
|
Poor
|
-------------------
|
|
Natural Rubber
|
Good
|
Good
|
Poor
|
Doubtful
|
|
Neoprene (both)
|
Good
|
Fair
|
Poor
|
Good
|
|
Nitrile
|
Fair
|
Fair
|
Doubtful
|
Good
|
|
Polyacrylic
|
Fair
|
Fair
|
Poor
|
------------------
|
|
Polysulphide
|
Good
|
Good
|
Poor
|
Good
|
|
Polyurethane
|
Fair
|
Poor
|
Poor
|
-----------------
|
|
Silicone
|
Good
|
Good
|
Poor
|
Poor
|
Compatibility is based on a sequence of: Good, Fair, Doubtful, Poor.
"------------" indicates that results were inconsistent.
COMMENTS
The tests were conducted using the various elastomer samples immersed
in the Stabilant 22 concentrate, or, as in the diluted forms, one part
Stabilant 22 and four parts of the diluant (by volume). Where a diluant
was used, it was present for ten percent of the initial 30 day exposure
period and then the samples were transferred to a pure Stabilant 22 bath.
The tests were run after an exposure of 30 days, 90 days, 180 days, and
360 days and the listings were based on the worst case information within
these periods for the elastomer listed.
The degradation of the elastomer seemed more dependent upon the diluant
used than on the Stabilant 22 and it must be remembered that the diluant
would usually evaporate within a relatively short period of time following
the application of the diluted Stabilant 22 to an actual connector, switch,
or circuit board.
Revision 4
NATO/CAGE Supplier Code 38948
15 mL of S22a has NATO Part # N 5999-21-900-6937
The Stabilants are patented in Canada - 1987; U.S. Patent
number 4696832. World-wide patents applied for. Because the patents cover
contacts treated with the material, a Point-of-sale License is granted
with each purchase of the material.
MATERIAL SAFETY DATA SHEETS ARE AVAILABLE ON REQUEST
NOTICE : This data has been supplied for information
purposes only. While to our knowledge it is accurate, users should determine
the suitability of the material for their application by running their
own tests. Neither D.W. Electrochemicals Ltd., their distributors, or their
dealers assume any responsibility or liability for damages to equipment
and/or consequent damages, howsoever caused, based on the use of this material.
Stabilant, Stabilant 22, and product type variations thereof
are Trade Marks of D.W. Electrochemicals Ltd.
The term "contact enhancer" is © 1983 Wright Electroacoustics..
Others are © Copyright 1987, '89. '90 - D.W. Electrochemicals Ltd.
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