Epoxy Bonding To Polyester Resin

Epoxy Bonding To Polyester Resin

Post by Dave Palme » Mon, 17 Mar 1997 04:00:00


I build a *** canoe about 10 years ago and I am planning to make some
modifications. I built the canoe using polyester resin and I would like to use epoxy
resins for my modifications. The canoe has been finished with marine grade polyurethane.

Does anyone have any suggessions for the easiest way to strip the polyurethane without
harming the polyester resin?

My main question is: Will I be able to get good adhesion between the epoxy and the
polyester resin? Is there any particular surface prep that would increase the bonding?

Thanks in advance for any info.

Dave Palmer

 
 
 

Epoxy Bonding To Polyester Resin

Post by KernHe » Wed, 19 Mar 1997 04:00:00

Quote:

>>I build a *** canoe about 10 years ago and I am planning to make

some
modifications. I built the canoe using polyester resin and I would like to
use epoxy
resins for my modifications. The canoe has been finished with marine grade
polyurethane.

Does anyone have any suggessions for the easiest way to strip the
polyurethane without harming the polyester resin?

My main question is: Will I be able to get good adhesion between the epoxy
and the polyester resin? Is there any particular surface prep that would
increase the bonding?<<
________________________________________________________

The proper stripping method is called sandpaper.  Start with 60 or 80
grit.  If you used a two part polyurethane then there is no way a chemical
*** can attack the polyurethane without zapping the polyester.  If
you used a one part polyurethane you might try acetone and see if this
lifts the polyurethane coating.  the sand until the polyester powders.

You don't need a "tie coat" between the epoxy and polyester.  The epoxy
will bond very well to sanded polyester.

System Three Resins, Inc.
Technical Support:  206/782-0818
FAX:  206/782-4426
Orders Only:  800/333-5514
P.O. Box 70436
Seattle, WA  98107

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