Re: Hard, Fast or Slow? Fast, usually

From: Ed Scott (edscott@best.com-DeleteThis.com)
Date: Wed May 09 2001 - 11:27:23 PDT


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Date: Wed, 09 May 2001 11:27:23 -0700
Subject: Re: Hard, Fast or Slow?  Fast, usually
From: Ed Scott <edscott@best.com-DeleteThis.com>
To: <wind_talk@opus.labs.agilent.com-DeleteThis.com>
Message-ID: <B71EDA1A.44E0%edscott@best.com-DeleteThis.com>
In-Reply-To: <3AF98387.F79B465C@mechsys2.me.berkeley.edu-DeleteThis.com>


on 5/9/01 11:00 AM, J.R. Seven at seven@mechsys2.me.berkeley.edu-DeleteThis.com wrote:

> Everything I've read says that varying the ratio of hardener to epoxy is a bad
> idea. This works for polyester because polyester hardener catalyzes a
> reaction
> in the polyester resin itself, and more catalyst makes the resin change more
> quickly.

I assumed that the difference between the slow and fast hardeners is the
amount of the active hardening ingredient in each (more in the fast). So,
if you pump out more slow stuff, you get more of the active ingredient to
decrease set-up time.

Of course, everyone knows what they say when you "assume" something.

-Ed



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