Subject: Re: [harryproa] epoxy foam
From: George Kuck
Date: 4/18/2008, 8:56 PM

There is no reason to use epoxy !  Vinyl ester resin can be used and is comparable to epoxy in the overall composite laminate.  Derek has talked about this many times and the subject has been discuss on the KSS forum.
Yesterday on the ProBoat virtual trade show and conference, the subject of using vinyl ester resin instead of epoxy was discussed and even for such items as a carbon fiber mast.  Rob Schofield (Naval Architect) gave a talk on "Determining Laminate Properties", he also echoed Derek 's opinion that vinyl ester resin was structurally  as good as epoxy for boat construction. As he explained it most of the strength comes from the fiber reinforcement and if you compare the strength of the resin to the fiber reinforcement you will see that the difference of the epoxy is insignificant.  The resin is only used to hold the fibers together.  I believe the presentation will be available on the ProBoat web sight for a month or two.
George Kuck
Chestertown, MD  
PS; When you add in the adverse health effects of working with epoxy I do not think there is any reason to consider it.       

captian_rapscallion <> wrote:

did anyone try epoxy foam with the KSS method? I think epoxy foam
would be cheaper than the other core foams -- and stronger. I'm
playing with volcanic ash (density of 0.2) and short carbon fiber
strands (industrial waste) I'm getting very positive results. I have
access to an instron. I 'm now stuck on a way to make a mold for the
foam; Kss makes some sense.

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