Extending epoxy pot life??

Put the mix into a styrofoam cooler with ice; or, set the pot into a
water/ice bath.

Steve wrote:
 > Anyone have any tips (other than using different hardener ratio's) to extend
 > the pot life of epoxy resin. The 95degF heat is reducing my pot life from 3
 > hours to only 1 hour or so.
 >
 > Chilling the resin and hardener? Chilling the mixed epoxy?? Other ideas.
 >
 > --
 >
 >
 > Steve G
 > 281-376-2682
 > Houston, Texas
 >
 > Remove the 'NS' from my email address to reply.
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Extending epoxy pot life?? 

 >Anyone have any tips (other than using different hardener ratio's) to extend
 >the pot life of epoxy resin. The 95degF heat is reducing my pot life from 3
 >hours to only 1 hour or so.
 >
 >Chilling the resin and hardener? Chilling the mixed epoxy?? Other ideas.

I have both heated and cooled hardner and epoxy prior to mixing and heated or
cooled mixed epoxy to get the pot life or cure time I wanted.

In your case, I believe either cooling the hardner and epoxy prior to mixing,
or cooling the epoxy after mixing (I put my "pot" in a tray of ice water) will
extend pot life.
Ali Meller
<a style='text-decoration: underline;' href="http://www.sailing.org/int505/graphic.htm" target="_blank">http://www.sailing.org/int505/graphic.htm</a><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Extending epoxy pot life?? 

Up, .... also keeping the 'thickness' of the pot to a minimum will help.
Example - instead of putting the mix in a small pot, increase the
surface area by putting it into a vessel similar to a paint roller tray
- the thinness will help to dissipate the generated heat a lot better
than a 'concentrated' shape.

Alexander A. Meller wrote:
  >>Anyone have any tips (other than using different hardener ratio's) to extend
  >>the pot life of epoxy resin. The 95degF heat is reducing my pot life from 3
  >>hours to only 1 hour or so.
  >>
  >>Chilling the resin and hardener? Chilling the mixed epoxy?? Other ideas.
 >
 >
 > I have both heated and cooled hardner and epoxy prior to mixing and heated or
 > cooled mixed epoxy to get the pot life or cure time I wanted.
 >
 > In your case, I believe either cooling the hardner and epoxy prior to mixing,
 > or cooling the epoxy after mixing (I put my "pot" in a tray of ice water) will
 > extend pot life.
 > Ali Meller
<font color=purple> > <a style='text-decoration: underline;' href="http://www.sailing.org/int505/graphic.htm</font" target="_blank">http://www.sailing.org/int505/graphic.htm</font</a>><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Extending epoxy pot life?? 

I find chilling the resin prior to use works well.

I also find that chilled resin is thicker and is sometime and advantage when
I have to glass in the vertical or overhead position.

Steve
s/v Good Intentions
 >> Stay informed about: Extending epoxy pot life?? 

Steve wrote:

 > I find chilling the resin prior to use works well.
 >
 > I also find that chilled resin is thicker and is sometime and advantage when
 > I have to glass in the vertical or overhead position.
 >
 > Steve
 > s/v Good Intentions

I'm working on an epoxy pot life extender powder for use in hot summer
conditions. Hope to have first round of testing none next week. Anyone
interested can email me at p.oman.TakeThisOut@ix.netcom.com

paul oman


--<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Extending epoxy pot life?? 

"Steve" <esteve.RemoveThis@hctc.com> wrote in message news:<vfriko26dkl531.RemoveThis@corp.supernews.com>...
 > I find chilling the resin prior to use works well.
 >
 > I also find that chilled resin is thicker and is sometime and advantage when
 > I have to glass in the vertical or overhead position.
 >
 > Steve
 > s/v Good Intentions


Unless the heat rises before the cure... then it will all get sloppy and run.
Scotty<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Extending epoxy pot life?? 

"Steve" <sgubser DeleteThis @houston.rr.com> wrote in message news:<G15La.23534$XV.1436779@twister.austin.rr.com>...
 > Anyone have any tips (other than using different hardener ratio's) to extend
 > the pot life of epoxy resin. The 95degF heat is reducing my pot life from 3
 > hours to only 1 hour or so.
 >
 > Chilling the resin and hardener? Chilling the mixed epoxy?? Other ideas.

Work quicker?? Just kidding. Raka.com has a slow cure hardner that I
use and mix with the fast cure they sell to create my own cure rate.
Another suggestion is to spread out the epoxy in a larger holder so it
is a thinner layer. Sometimes in real hot weather I use a paint
rolling tray or even a pie pan, the more spread out it is, the slower
it will kick. Keep mixing it as you go along, although I have not done
tests, I am told this will keep the heat from building up from the
reaction and slow the cure. Adding thickeners will also make Epoxy
kick sooner too. Good luck, if I think of any more I will get back
with you. Of course all the talk of cooling is worth noting.
Scotty from SmallBoats.com<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Extending epoxy pot life?? 

Steve wrote:
 >
 > Anyone have any tips (other than using different hardener ratio's) to extend
 > the pot life of epoxy resin. The 95degF heat is reducing my pot life from 3
 > hours to only 1 hour or so.
 >
 > Chilling the resin and hardener? Chilling the mixed epoxy?? Other ideas.
 >
 > --
 >
 > Steve G
 > 281-376-2682

All good. Also, keep out of direct sunlight. The UV will heat
and hurry it. Use a champagne bucket with ice, chilled stirring
utensils. Keep the work cool, under a shade, even with water
spray on backside.
 > Houston, Texas
 >
 > Remove the 'NS' from my email address to reply.

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 >> Stay informed about: Extending epoxy pot life?? 

"Steve" writes:
 > Anyone have any tips (other than using different hardener ratio's) to
extend
 > the pot life of epoxy resin. The 95degF heat is reducing my pot life from
3
 > hours to only 1 hour or so.

Good grief, if I get 15 minutes of pot life, think it is an eternity.

1) Mix smaller batches.

2) Mix in buckets where the diameter of the bucket exceeds the depth of
mixed epoxy about 6:1 (ie: 6" dia, 1" of mixed epoxy.

3) Avoid laying resin in the heat of the day and in direct sunlight.

Many is the time I started laying glass at 0630, had to quit by 0930, then
returned to lay glass on the opposite side of the hull around 1600
continuing until dark.

3) Work faster<G>.

BTW, NEVER muck with the ratios. This is epoxy, not polyester.

HTH


--
Lew

S/A: Challenge, The Bullet Proof Boat, (Under Construction in the Southland)
Visit: <http://home.earthlink.net/~lewhodgett> for Pictures<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Extending epoxy pot life?? 

On Sat, 28 Jun 2003 00:10:14 GMT, "Steve" <sgubser.RemoveThis@houston.rr.com>
wrote something
.......and in reply I say!:

I think there is something strange if you are getting 3 hours or even
1 hour out of epoxy. 15-45 minutes is about right. What brand are you
using?

You should not alter mix ratios. Araldite was about as free a make as
any for this, and even it had limits. People get quite anal about
mixing accurately, with good reason.

 >Anyone have any tips (other than using different hardener ratio's) to extend
 >the pot life of epoxy resin. The 95degF heat is reducing my pot life from 3
 >hours to only 1 hour or so.
 >
 >Chilling the resin and hardener? Chilling the mixed epoxy?? Other ideas.
 >
 >--
 >
 >
 >Steve G
 >281-376-2682
 >Houston, Texas
 >
 >Remove the 'NS' from my email address to reply.
 >
 >

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 >> Stay informed about: Extending epoxy pot life?? 

Yes, chilling helps but don't over chill it, e.g. room temperature epoxies
can be chilled to 50 F or slightly lower and mix up OK. You can also choose
to use a brand of epoxy with a slow hardener available. System Three comes
to mind, but there are others. Immediately after mixing, pour the epoxy
into a roller pan so it makes a thin puddle...your enemy is heat.
Increasing surface area allows heat from the exothermic reaction to escape
and to not be trapped in the epoxy.

Brian

--
- Remove the uppercase NS' characters from my email address
"Steve" <sgubser.RemoveThis@houston.rr.com> wrote in message
news:G15La.23534$XV.1436779@twister.austin.rr.com...
 > Anyone have any tips (other than using different hardener ratio's) to
extend
 > the pot life of epoxy resin. The 95degF heat is reducing my pot life from
3
 > hours to only 1 hour or so.
 >
 > Chilling the resin and hardener? Chilling the mixed epoxy?? Other ideas.
 >
 > --
 >
 >
 > Steve G
 > 281-376-2682
 > Houston, Texas
 >
 > Remove the 'NS' from my email address to reply.
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Extending epoxy pot life??