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'[EE] Thermally conductive electrically insulating '
2007\02\14@120159 by Denny Esterline

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I need a thermally conductive, electrically insulating epoxy. Can anybody
recommend a specific material? I only need a couple ounces and preferably
something I can get here in the US.

Thanks,
-Denny

2007\02\14@121724 by Bob Blick

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> I need a thermally conductive, electrically insulating epoxy. Can anybody
> recommend a specific material? I only need a couple ounces and preferably
> something I can get here in the US.

Hi Denny,

Loctite makes several different types. Some for potting, others for
semi-high-strength applications.

Please note that thermally conductive is a relative term, it's good but
not great.

Cheerful regards,

Bob

2007\02\14@122853 by Robert Young

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>
>
> I need a thermally conductive, electrically insulating epoxy.
> Can anybody recommend a specific material? I only need a
> couple ounces and preferably something I can get here in the US.
>
> Thanks,
> -Denny
> --
Not sure of the degree of electrically insulating but MG Chemicals
catalog # 832TC is pretty good stuff if you are looking for
encapsulation and potting epoxy.  Not sure what its shear and tensile
strength is so if you need mechanical adhesion, this might not be a good
choice.

2-part, relatively inexpensive as these things go.

Rob

2007\02\14@123320 by Carl Denk

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Most any plain (clear color, can have a light tint), not filled with
anything 2 part epoxy from your local store should work. cost a dollar
or 2, make a trial and check with ohmmeter. If you want a filler, milled
cotton flox (but I wouldn't use that if moisture is near), in the boat
and homebuilt aircraft areas, milled fiberglass, and micro balloons of
glass are excellent fillers. They are relatively inexpensive. Check out:
www.wicksaircraft.com/catalog/product_cat.php/subid=1160/index.html
http://www.wicksaircraft.com/catalog/product_cat.php/subid=1562/index.html

also West Marine and Aircraft Spruce

Bob Blick wrote:
{Quote hidden}

2007\02\14@123946 by William Chops Westfield

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On Feb 14, 2007, at 9:01 AM, Denny Esterline wrote:

> I need a thermally conductive, electrically insulating epoxy.
> Can anybody recommend a specific material? I only need a couple
> ounces and preferably something I can get here in the US.

You're probably looking at something filled with Aluminum oxide
and/or other ceramics. They sell that sort of thing for attaching
heatsinks.  "Arctic Alumina" and similar.  But it tends to come in
5g units, so "a couple of ounces" is quite a lot (and it may not be
sufficiently conductive for "bulk" casting. You might do OK with
generic epoxy and bulk alumina from the local ceramics supplier.

BillW

2007\02\14@125031 by William Bross

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Denny Esterline wrote:

>I need a thermally conductive, electrically insulating epoxy. Can anybody
>recommend a specific material? I only need a couple ounces and preferably
>something I can get here in the US.
>
>Thanks,
>-Denny
>  
>
Try Arctic Silver Thermal Adhesive.  I use it on my CJ thermistors my
thermocouple boards.
http://www.arcticsilver.com/arctic_silver_thermal_adhesive.htm

Best Byte has the best price
http://www.bestbyteinc.com/index.html?stocknumber=TIM-ARS-ASA

Bill

2007\02\14@130533 by Matt Pobursky

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On Wed, 14 Feb 2007 12:01:55 -0500, Denny Esterline wrote:
> I need a thermally conductive, electrically insulating epoxy. Can
> anybody recommend a specific material? I only need a couple ounces
> and preferably something I can get here in the US.

Check out MasterBond. They have pretty much anything you'll ever need
for encapsulating, gluing, coating, etc. I've used some of their
thermally conductive potting compound in the past and it was
excellent. I've also used a variety of their other compounds for
production items and they were all good.

http://www.masterbond.com/

Matt Pobursky
Maximum Performance Systems


2007\02\14@131440 by Denny Esterline

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>
>
> > I need a thermally conductive, electrically insulating epoxy.
> > Can anybody recommend a specific material? I only need a couple
> > ounces and preferably something I can get here in the US.
>
> You're probably looking at something filled with Aluminum oxide
> and/or other ceramics. They sell that sort of thing for attaching
> heatsinks.  "Arctic Alumina" and similar.  But it tends to come in
> 5g units, so "a couple of ounces" is quite a lot (and it may not be
> sufficiently conductive for "bulk" casting. You might do OK with
> generic epoxy and bulk alumina from the local ceramics supplier.
>
> BillW


It's not realy "bulk", the application is putting a stainless steel foil on
a plastic cylinder. The cylinder is instrumented with a couple dozen
thermocouples and the foil is being used as a heating element. Probably
about 30 square inches and oly a few thousandths thick. The whole gizmo is
to be used in a windtunnel to demonstrate heat transfer concepts to
mechanical engineering students.

-Denny

2007\02\14@131709 by Denny Esterline

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> On Wed, 14 Feb 2007 12:01:55 -0500, Denny Esterline wrote:
> > I need a thermally conductive, electrically insulating epoxy. Can
> > anybody recommend a specific material? I only need a couple ounces
> > and preferably something I can get here in the US.
>
> Check out MasterBond. They have pretty much anything you'll ever need
> for encapsulating, gluing, coating, etc. I've used some of their
> thermally conductive potting compound in the past and it was
> excellent. I've also used a variety of their other compounds for
> production items and they were all good.
>
> http://www.masterbond.com/
>
> Matt Pobursky
> Maximum Performance Systems


Actualy I spoke to masterbond this morning. The smallest volume they could
sell me would be a half pint each of resin and hardener - at a cost of $500
US.  Uhmmm, no.

-Denny

2007\02\14@132553 by Andre Abelian

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Denny,

I bough one from FAI 30$ it takes forever to dry up I didn't have time to wait
I made my own by mixing 5 minutes epoxy with popular white grease compound.
I tested it works fine dries fast.

Andre Abelian






-----Original Message-----
From: spam_OUTpiclist-bouncesTakeThisOuTspammit.edu [.....piclist-bouncesKILLspamspam@spam@mit.edu]On Behalf
Of Denny Esterline
Sent: Wednesday, February 14, 2007 9:02 AM
To: piclistspamKILLspammit.edu
Subject: [EE] Thermally conductive electrically insulating epoxy


I need a thermally conductive, electrically insulating epoxy. Can anybody
recommend a specific material? I only need a couple ounces and preferably
something I can get here in the US.

Thanks,
-Denny

2007\02\14@134306 by Bob Blick

face
flavicon
face
> It's not realy "bulk", the application is putting a stainless steel foil on
> a plastic cylinder. The cylinder is instrumented with a couple dozen
> thermocouples and the foil is being used as a heating element. Probably
> about 30 square inches and oly a few thousandths thick. The whole gizmo is
> to be used in a windtunnel to demonstrate heat transfer concepts to
> mechanical engineering students.

Hi Denny,

Then don't use thermally conductive epoxy, just use 5-minute or 2-ton from
the hardware store.

Cheerful regards,

Bob

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