Epoxy mixes

   Hi 
I have some of those powders you put into epoxy to make it so more magical things!

I have collodical sillica
Microballoons (sound like something the smurfs have on a birthday party!)
And Mirofibres.

I've used the sillica to make the epoxy more, thick and thats what I used to fix the "shark bite" in my dagger board my moulding it into a blob and sanding down.

Anyway, what do there magic powders do to epoxy and what are their uses?
Thanks

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zailor Send Private Message Find Member's Posts Visit Member's Homepage Far too distracted from work Joined: 10 May 09 Location: Penparc Online Status: Offline Posts: 249	Post Options Post Reply Quote zailor Report Post Quote Reply Topic: Epoxy mixes Posted: 18 May 10 at 5:28pm
	Hi I have some of those powders you put into epoxy to make it so more magical things! I have collodical sillica Microballoons (sound like something the smurfs have on a birthday party!) And Mirofibres. I've used the sillica to make the epoxy more, thick and thats what I used to fix the "shark bite" in my dagger board my moulding it into a blob and sanding down. Anyway, what do there magic powders do to epoxy and what are their uses? Thanks

JimC Send Private Message Find Member's Posts Visit Member's Homepage Really should get out more Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6564	Post Options Post Reply Quote JimC Report Post Quote Reply Posted: 18 May 10 at 5:49pm
	Silica - thicker/thixotropic, brittle Microfibres - stronger, flexible microballoons and similar - lighter and, since you use less epoxy, probably cheaper

zailor Send Private Message Find Member's Posts Visit Member's Homepage Far too distracted from work Joined: 10 May 09 Location: Penparc Online Status: Offline Posts: 249	Post Options Post Reply Quote zailor Report Post Quote Reply Posted: 18 May 10 at 5:57pm
	so Im guessing I was right using silica for the dager board so its strong but brittle but I wont want flex But the microfibers will be good for fixing my europe deck as in its old age its bound to flex! And microballons, filling holes? By lighter do you mean in weight or something else, forgive my dumbness

alstorer Send Private Message Find Member's Posts Really should get out more Joined: 02 Aug 07 Location: Cambridge Online Status: Offline Posts: 2899	Post Options Post Reply Quote alstorer Report Post Quote Reply Posted: 18 May 10 at 7:15pm
	by lighter he means less dense, yes- microballoons are hollow glass spheres. silica does help make the finished resin harder, but in formulation tends to come into it's own in viscosity control- important more for un-cured properties, such as the ability to mix properly when pumped through a "static" mixer.
	-_ Al

Rupert Send Private Message Find Member's Posts Really should get out more Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8928	Post Options Post Reply Quote Rupert Report Post Quote Reply Posted: 18 May 10 at 8:20pm
	The silica is the most difficult to sand back after, too, which may affect where you use it.
	Firefly 2324, Lightning 130, Puffin 229, Minisail 3446 Mirror 70686

zailor Send Private Message Find Member's Posts Visit Member's Homepage Far too distracted from work Joined: 10 May 09 Location: Penparc Online Status: Offline Posts: 249	Post Options Post Reply Quote zailor Report Post Quote Reply Posted: 18 May 10 at 8:37pm
	yes I found that out when I used it on my dagger board, I used the massive blob then sand down technique. Thank god for power tools So last question, would I use the micro fibres/ballons to get the right viscosity or add sillica to the epoxy/balloon/fibres mix?