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Stabilant 22 Contact Enhancer Technical Notes

Tech. Note 21 - Elastomer Compatibility & Stabilants

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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Stabilant
Stabilant 22 Contact Enhancer

Stabilant 22 Contact Enhancer

We carry the complete line of Stabilant products. Looking for something not listed here? Please contact us.
Stabilant 22
APPLICATION NOTES
1. Electronic Equipment
2. Computer cards
3. Schadow switches
4. Mic connectors
5. RTS & Dual plug patch bays
6. Biomedical Electronics
7. Computing & Peripherals
8. Cable TV
9. Robotics
10. Environmental Impact
11. Recording studios
12. Broadcast equipment
13. Mobile Radio
14. Educational computing
15. Stereo systems
16. Aid to IC insertion
17. Navigational equipment
18. Card edge conn. problems
19. Complex process control
20. Automotive service
21. Gold plating/solder alloy
22. Very high humidity
23. High current thermal runaway
24. Car stereo systems
25. Plastic element pots.
26. Farm machinery & trucks
27. Model & hobby
28. RF case seals
29. Outdoor environments
30. Computer crashes
31. Relays & switches
32. Silicone problems
33. Tin-plated contacts
34. Solder flux & resin residue
35. Post application color tinting
36. Aircraft connectors w/ flurosilicones
37. Avoiding unsafe solvents
38. S22 R&D Design Goals
39. Stabilant use on PLCC's
40. Sensor problem solution
41. Repair of flood damage
42. Marine electrical & electronics
43. All Cameras & Video Equipment
44. SCSI removable SCA drives, caddies & connections
45. Home Theater & Computer Connectors

Some of these application notes are repetitive of material in other application notes. We realize this. But some were written as a reference to a contact problem in a particular field or application.

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 R.A.L. Audio Services, 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 information.
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Stabilant 22
REVIEWS
Over the years, Stabilant 22 has been highly parsed in publications that target a wide range of electronics applications including:
* Andrew Marshall's Audio Ideas Guide
* BYTE Magazine (7 articles)
* Windows Magazine
* Q.S.T. Amateur Radio
* Model Railroads (2 articles)
* Motor Magazine
Stabilant 22
TECHNICAL NOTES
1. MSDS - Stabilant 22
2. General Information
4. MSDS - Stabilant 22A
5. MSDS - Stabilant 22E
9. MSDS - Stabilant 22L
20. Military Applications
21. Elastomer Compatibility
22. Effectiveness of Stabilants
24. Connector Harmonic Distortion
39. Signal rise time

There are gaps in the sequence numbers below because some Technical Note s were written by the manufacturer for specific companies and are confidential.

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 R.A.L. Audio Services, 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 information.
Stabilant
Stabilant 22 Contact Enhancer

Stabilant 22 Contact Enhancer

We carry the complete line of Stabilant products. Looking for something not listed here? Please contact us.

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