[NSRCA-discussion] Thinning Hobbypoxy...?

[Karl G. Mueller]

Gray,

I have been using Lacquer Thinner with good success. It contains all
of the ingredients mentioned like Toluene, methyl ethyl ketone, methanol
and acetone. Do you see anything why it should not be used as a thinner
for epoxy ?

Karl G. Mueller
kgamueller at rogers.com

  ----- Original Message ----- 
  From: Gray E Fowler
  To: NSRCA Mailing List
  Sent: Monday, April 17, 2006 9:46 AM
  Subject: Re: [NSRCA-discussion] Thinning Hobbypoxy...?



  Del

  Sorry for a late reply...was on Vacation.

  DO NOT use rubbing alcohol.
  I realize that many advocate this and swear it works but it is not a good
idea. That 90% means 90% isopropyl and 10% water. Isopropyl is not an
efficient
  epoxy solvent and worse- water messes up the amine curing agents,,,badly.
you will lose fuel resistance and make the cure soft and gummy.

  IF there is no polystyrene foam (wing cores, some mfgs "core" fuse
structure) then use acetone or methyl ethyl ketone (MEK). These are much
better and will ensure total evaporation from a thin "fuelproofing"
application.

  If there is polystyrene foam then an alcohol must be used. Methyl alcohol
is the best, but semi hard to find. Ethyl alcohol is second best and is
usually called "denatured alcohol" which means it is100%  Ethanol with a
nasty tasting additive (Everclear has water too).

  Home Depot/Lowes has these solvents.

  In any case no puddling and thickness build up allowed.

  Also to improve the quality of Hobby poxy cure (the real slow cure stuff)
Mix the epoxy and allow to sit in a mass (ex-a cup)for 15-30 minutes before
thinning.
  This epoxy has a polyamide curing agent that requires "induction" to
ensure a really good cure.


  Gray Fowler
  Principal Chemical Engineer
  Composites Engineering


        "Del K. Rykert" <drykert2 at rochester.rr.com>
        Sent by: nsrca-discussion-bounces at lists.nsrca.org
        04/12/2006 06:08 PM Please respond to
              NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>


       To "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
              cc
              Subject [NSRCA-discussion] Thinning Hobbypoxy...?







  I have a Question? Does anyone know of of a thinner that would be
acceptable to use to thin hobbypoxy to make it flow more freely to moisture
proof..  Strength is not required. I do realize all the rules against
thinning epoxy in normal use but looking to make it less viscous, besides
using heat?  Thanks for your thoughts.

                   Del
           nsrca - 473

   _______________________________________________
  NSRCA-discussion mailing list
  NSRCA-discussion at lists.nsrca.org
  http://lists.nsrca.org/mailman/listinfo/nsrca-discussion




----------------------------------------------------------------------------
--


  _______________________________________________
  NSRCA-discussion mailing list
  NSRCA-discussion at lists.nsrca.org
  http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20060417/eab431a1/attachment-0001.html