It is my understanding that there are three types of resins, polyester,
vinalester and epoxy resin. Epoxy resins will not bond to polyester products
but will bond to vinal-ester "sort of". The same applies to polyester products
not bonding to epoxy products but will bond to vinal-ester products "sort of".
So what you have is vinal-ester which will bond to both. So according to theory
if you want to bond polyester to an epoxy product you would have to use a
vinal-ester layer between the two products. This would not be as strong a bond
as epoxy to epoxy or polyester to polyester because of the makeup of the
molecules involved. Think of a vinal-ester molecule as being 1/2 poly-ester and
1/2 epoxy therefore you will get only half of the bonding strength.
The above is based on information from "Fiberglass Composite materials"
written by Forbes Aird
Mike Turner
----- Original Message -----
From: Dan Heath
To: kr...@mylist.net ; larry.ca...@comcast.net
Sent: Friday, November 21, 2003 6:57 PM
Subject: Re: KR>polyester/epoxy
I read a very comprehensive article on a web site forwarded to the NET,
recently, that states the opposite of that. He states that it is a very
good filler and that he applies it over a micro and resin filler. One of
the resins that he uses if West Systems.
This can get very confusing.
Is SuperFill an Epoxy? All I know is that it is two part.
N64KR
Daniel R. Heath - Columbia, SC
da...@kr-builder.org
See you in Mt. Vernon - 2004 - KR Gathering
See our KR at http://KR-Builder.org - Click on the pic
See our EAA Chapter 242 at http://EAA242.org
-------Original Message-------
From: larry.ca...@comcast.net; KRnet
Date: Friday, November 21, 2003 7:52:40 PM
To: 'KRnet'
Subject: KR>polyester/epoxy
DO NOT use polyester resin to build your KR (period)
Polyester Resin, as stated below, cannot be properly bonded to/or with other
adhesives.
So the statement "There is nothing wrong with building a plane using
polyester", has to be wrong on it's face.
- Polyester Resin comes NO WHERE near having the strength of epoxy.
Larry A Capps
Naperville, IL
-----Original Message-----
I have spoken to several commercial boat builders
about
polyester
epoxy.
There is nothing wrong with building a plane using
polyester
Essentially the impression that I got
dont mix the two.
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