Fiery epoxy ... !!

[Arfa Daily]

A few weeks back, I bought some two part rapid epoxy in a twin syringe
arrangement, from the local 99p shop - and very good it is too, if you can
stand the smell.

Today, I needed to have some of it go off extra quickly, so I mixed a small
amount up on a piece of folded up paper, and then waved the hot air pencil
over the little pile, with it on its lowest setting, which is not
particularly uncomfortable on the skin. To my surprise, after a few seconds
of this treatment, the mix took off in a violent and uncontrolled reaction.
It smoked fairly profusely, and generated so much heat that it boiled ! I
have warmed epoxy - albeit properly branded Araldite - in this way many
times before, and the only thing that it has done is to go watery for a
short time, and then rapidly into the 'sticky toffee' phase. Anyone else
ever suffered a reaction like this ?

Arfa

 

[Jeff Liebermann]

On Sat, 10 Sep 2011 02:20:22 +0100, "Arfa Daily"
<arfa.daily@ntlworld.com> wrote:

To my surprise, after a few seconds
of this treatment, the mix took off in a violent and uncontrolled reaction.

<http://www.westsystem.com/ss/other-epoxy-related-hazards/>
<http://www.thehulltruth.com/boating-forum/82513-anybody-ever-caught-west-epoxy-resin-fire-exotherm.html>

I tried to accelerate an epoxy curing reaction using a [name
with-held] accelerant and ended up with a very hot fire, followed by a
volcano like eruption belching flaming epoxy, and spewing noxious
fumes. Common two part epoxy is hydrocarbon based, and burns quite
readily before and while curing. Some aircraft epoxy is full of
phosphorus:
<http://www.fire.tc.faa.gov/pdf/TN05-44.pdf>


--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558
# http://802.11junk.com jeffl@cruzio.com
# http://www.LearnByDestroying.com AE6KS

 

[isw]

In article <qXyaq.1989$C44.1712@newsfe28.ams2>,
"Arfa Daily" <arfa.daily@ntlworld.com> wrote:

A few weeks back, I bought some two part rapid epoxy in a twin syringe
arrangement, from the local 99p shop - and very good it is too, if you can
stand the smell.

Today, I needed to have some of it go off extra quickly, so I mixed a small
amount up on a piece of folded up paper, and then waved the hot air pencil
over the little pile, with it on its lowest setting, which is not
particularly uncomfortable on the skin. To my surprise, after a few seconds
of this treatment, the mix took off in a violent and uncontrolled reaction.
It smoked fairly profusely, and generated so much heat that it boiled ! I
have warmed epoxy - albeit properly branded Araldite - in this way many
times before, and the only thing that it has done is to go watery for a
short time, and then rapidly into the 'sticky toffee' phase. Anyone else
ever suffered a reaction like this ?

Yup. And it can be even worse with some polyesters. Depends on the
precise mix of components, and how much accelerator is in there. I used
to work where large quantities of polyester were used, and there were 50
gallon drums half-filled with water around to drop the "dregs" in.

Isaac

 

[N_Cook]

Arfa Daily <arfa.daily@ntlworld.com> wrote in message
news:qXyaq.1989$C44.1712@newsfe28.ams2...

A few weeks back, I bought some two part rapid epoxy in a twin syringe
arrangement, from the local 99p shop - and very good it is too, if you can
stand the smell.

Today, I needed to have some of it go off extra quickly, so I mixed a
small
amount up on a piece of folded up paper, and then waved the hot air pencil
over the little pile, with it on its lowest setting, which is not
particularly uncomfortable on the skin. To my surprise, after a few
seconds
of this treatment, the mix took off in a violent and uncontrolled
reaction.
It smoked fairly profusely, and generated so much heat that it boiled ! I
have warmed epoxy - albeit properly branded Araldite - in this way many
times before, and the only thing that it has done is to go watery for a
short time, and then rapidly into the 'sticky toffee' phase. Anyone else
ever suffered a reaction like this ?

Arfa

And while on elfin safety - beware of simply dropping a spot of superglue on
cotton trousers, You can end up with smoking trousers and burnt skin .

 

[Phil Allison]

"Arfa Daily"

A few weeks back, I bought some two part rapid epoxy in a twin syringe
arrangement, from the local 99p shop - and very good it is too, if you can
stand the smell.

** From China of course.

Today, I needed to have some of it go off extra quickly, so I mixed a
small amount up on a piece of folded up paper, and then waved the hot air
pencil over the little pile, with it on its lowest setting, which is not
particularly uncomfortable on the skin. To my surprise, after a few
seconds of this treatment, the mix took off in a violent and uncontrolled
reaction. It smoked fairly profusely, and generated so much heat that it
boiled ! I have warmed epoxy - albeit properly branded Araldite - in this
way many times before, and the only thing that it has done is to go watery
for a short time, and then rapidly into the 'sticky toffee' phase. Anyone
else ever suffered a reaction like this ?

** Sure sounds like he makers have included an accelerant - like MEK as
used for setting off polyester resin.

Use a few drops too many of that evil stuff and you have a smoking hot
result.

( MEK = Methyl Ethyl Ketone )


.... Phil

 

[Arfa Daily]

"Phil Allison" <phil_a@tpg.com.au> wrote in message
news:9d0nv9FtbvU1@mid.individual.net...

"Arfa Daily"

A few weeks back, I bought some two part rapid epoxy in a twin syringe
arrangement, from the local 99p shop - and very good it is too, if you can
stand the smell.

** From China of course.


Today, I needed to have some of it go off extra quickly, so I mixed a
small amount up on a piece of folded up paper, and then waved the hot air
pencil over the little pile, with it on its lowest setting, which is not
particularly uncomfortable on the skin. To my surprise, after a few
seconds of this treatment, the mix took off in a violent and uncontrolled
reaction. It smoked fairly profusely, and generated so much heat that it
boiled ! I have warmed epoxy - albeit properly branded Araldite - in this
way many times before, and the only thing that it has done is to go
watery for a short time, and then rapidly into the 'sticky toffee' phase.
Anyone else ever suffered a reaction like this ?

** Sure sounds like he makers have included an accelerant - like MEK as
used for setting off polyester resin.

Use a few drops too many of that evil stuff and you have a smoking hot
result.

( MEK = Methyl Ethyl Ketone )


... Phil

I would guess that it probably is from China, but it definitely seems to
work at least as well as Araldite rapid at four times the price. The only
downside is that it has a really nasty smell. I can't quite put my finger on
it, but it 'feels' organic - sort of 'bodily fluids', if that makes any
sense. You can also get some cyanoacrylate glue from the same place. A whole
card of tubes for 99 pence, and again, it really is some of the best
superglue that I've ever used ...

Arfa