Author Topic: Using MS Polymer as a potting compound  (Read 311 times)

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Offline jfiresto

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Using MS Polymer as a potting compound
« on: July 05, 2019, 06:14:29 pm »
Has anyone used MS Polymer construction adhesive as a potting compound? I want to pot the connector and wires at the end of an adapter cable, I can wait, and I do not need more than roughly 5 mm of cure depth.

I have some UHU Ultra construction adhesive (381 Kbyte TDS) which sticks to almost anything, does not shrink and has a Shore A hardness of 70, that of a typical car tire.
 

Offline SMTech

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Re: Using MS Polymer as a potting compound
« Reply #1 on: July 06, 2019, 01:07:36 am »
Well its non-acidic which is typically the first stumbling block when using silicon sealants/adhesives with electronics.
Electrical conductivity you could test
Depending what you are  potting, thermal conductivity could be an issue, I don't see numbers for that so who knows.
 

Offline jfiresto

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Re: Using MS Polymer as a potting compound
« Reply #2 on: July 06, 2019, 02:37:22 am »
Thank you for that tidbit.

I searched a bit more and found a company that is marketing MS Polymer as – yes indeed – an electronic potting compound (508 kByte PDF). They don't say much about the limited cure depth.

Since the stuff came out of Japan, I should add, it is also good in earthquakes.  :)
 

Offline xavier60

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Re: Using MS Polymer as a potting compound
« Reply #3 on: July 06, 2019, 08:50:27 am »
TB1530C is one of the few moisture cure sealant/adhesives that is liquid. I haven't actually used it for potting, I have used it seal off high voltage transistor pads.
https://www.tablazat.hu/images/upload/products/427_1530c.pdf
The product can be difficult to source.
« Last Edit: July 06, 2019, 08:52:11 am by xavier60 »
Hioki AS100D vom, HP 54645A dso, Fluke 87V dmm, AN8008 dmm, Agilent U8002A psu, New! FY6600 function gen.
 

Offline jfiresto

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Re: Using MS Polymer as a potting compound
« Reply #4 on: July 12, 2019, 08:49:38 pm »
Thank you for the link to a quite useful datasheet, clearly written by practitioners to help other practitioners. I think MS Polymer will be the right stuff. When I get a chance I am also going to have see if it really does bond to nylon.
 

Offline xavier60

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Re: Using MS Polymer as a potting compound
« Reply #5 on: July 12, 2019, 09:05:33 pm »
I have also been using this product although it's not a liquid,
https://www.vipfast.com.au/product/hb-fuller-toolbox-invisible-ms-adhesive-sealant/
Hioki AS100D vom, HP 54645A dso, Fluke 87V dmm, AN8008 dmm, Agilent U8002A psu, New! FY6600 function gen.
 

Offline jfiresto

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Re: Using MS Polymer as a potting compound
« Reply #6 on: July 12, 2019, 10:35:11 pm »
Hmmm. That one has a Shore A hardness of 49. I am getting the impression that clear implies softer.
 


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