I’ve never really seen a visible a problem incorporating Mg and Al and other
metal powders into paraffin waxes although I do normally add other stuff in
like charcoal and/or red gum and 10%-20% hot melt glue and I generally tend to
not heat it to the point of very runniness.
Troy
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Redacted sender "monsieurboo" for DMARC
Sent: Wednesday, 11 January 2017 6:38 AM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: arocket Digest V5 #9
That's an interesting "flip of the script" to encapsulate powdered wax in HTPB.
As to metals, I've never had luck incorporating aluminum powder into melted
paraffin mixes -- the melt looks lovely, but the paraffin doesn't really "wet"
the powder so as the grain cools, the powder separates out in streaks and I
can't get a homogeneous grain. Using HTPB as the binding agent is an innovative
workaround.
Care to share a good starting ratio of HTPB to powdered wax? I'd love to give
that a try.
Cheers,
Mark L.
From: Edward Wranosky <edwardcw@xxxxxxxxx <mailto:edwardcw@xxxxxxxxx> >
Date: Mon, 9 Jan 2017 12:39:08 -0700
Subject: [AR] Re: N2O hybrid record -- paraffin grain
I have also used PEVA quite a bit for wax based hybrids, as well as melting
asphaltum into the wax.
The best combination I've found yet is of HTPB and powdered wax. The HTPB
encapsuates the powdered wax, yet allows for the lower melting point. The
wax greatly increases the surface area of the HTPB, allowing it have a high
regression rate. You can add in metals to this as well.
Edward
