from wikipedia
When a thermoset powder is exposed to elevated temperature, it begins to
melt, flows out, and then chemically reacts to form a higher molecular
weight polymer
in a network-like structure. This cure process, called crosslinking,
requires a certain temperature for a certain length of time in order to
reach full cure and establish the full film properties for which the
material was designed. Normally the powders cure at 2000C (3900F) for 10
minutes.
Peter
> Date: Fri, 8 Oct 2010 17:26:05 -0700
> To: escanlon@wa-net.com; ppeters914@comcast.net;
datsun-roadsters@autox.team.net
> From: az589@lafn.org
> Subject: Re: [Roadsters] POR-15
>
> I don't think that there is any part of a roadster that can withstand
> 4500F for even two minutes without melting or burning to a crisp.
>
> Stan
> ==============
>
> At 04:52 PM 10/8/2010, E Scanlon wrote:
> >Some thoughts regarding the difference between powder coating and
> >POR that many ignore or may not be aware of.
> >
> >ANYTHING you have powder coated MUST be able to withstand 4500F for
> >an EXTENDED period of time in order for the powder coating to adhere
> >and flow out properly. If it does not reach that temperature for
> >the required period of time, then the effectiveness of the coating
> >will be compromised accordingly. POR is applied at room temperature.
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