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Re: Polyester resin coil coating?

On Sun, 19 Jan 1997, Tesla List wrote:

> For a while now I've been eyeing some clear polyester casting resin at one
> of the local industrial plastics places (the kind of stuff they use for
> making clear paperweights with embedded objects).  I was just down there
> yesterday and they had a number of different types, as well as other fun
> things like two part foam mixes, epoxies etc.  Anyway, I was just wondering
> if the casting resin would be any good as a coil coating.  I vaguely
> remember someone saying a while ago that Polyester was NOT a good
> dielectric and was very lossy.  Just thought I'd check for sure, since this
> stuff looks awfully useful (to pot chokes in perhaps).  The Behr Build
> sounds great, but I'm interested in finding something less brittle since
> Chip(?) mentioned cracking problems with cold temperatures.  Maybe I'll
> stick with varnish, but thought I'd ask at least.  Thanks in advance for
> any input!

At least the polyester resin I have (ONCE!) used for coating a 
secondary was not suitable for it because of one important reason:
It's HARD and BRITTLE. That first knock on the secondary will make
the coating shatter.

Beware,

  Kristian Ukkonen.

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| Kristian Ukkonen       |  Do as thou wilt shall be the whole of the law |
| kukkonen-at-alpha.hut.fi  |_____  Chance favours the prepared mind  |-------
| http://www.hut.fi/~kukkonen |  Fear is the mind-killer  |---------
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