I've been using Unibond 800 in small batches (4 ounces or so) for
lamination work. Mixing by hand in a plastic cup with a wooden stick
(tongue depressor) has been sufficient. This morning, I had occasion to
mix a much larger batch - 20 ounces. It seems like mixing a batch this
large by hand is a bad idea. I worked at it for a good 10 minutes, but
there were still a lot of lumps of the catalyst in the glue. When I
rolled the glue out, those lumps crushed out and became really obvious
as white slotches in the brownish glue. I hope it doesn't affect this
project.
Maybe mixing in smaller batches is a good idea. But is there a
reasonable way to mix a large batch and not have this happen?
Thanks.
--
Art Greenberg
artg at eclipse dot net
On Aug 9, 6:21 am, Art Greenberg <[email protected]> wrote:
> I've been using Unibond 800 in small batches (4 ounces or so) for
> lamination work. Mixing by hand in a plastic cup with a wooden stick
> (tongue depressor) has been sufficient. This morning, I had occasion to
> mix a much larger batch - 20 ounces. It seems like mixing a batch this
> large by hand is a bad idea. I worked at it for a good 10 minutes, but
> there were still a lot of lumps of the catalyst in the glue. When I
> rolled the glue out, those lumps crushed out and became really obvious
> as white slotches in the brownish glue. I hope it doesn't affect this
> project.
>
> Maybe mixing in smaller batches is a good idea. But is there a
> reasonable way to mix a large batch and not have this happen?
>
> Thanks.
>
> --
> Art Greenberg
> artg at eclipse dot net
When I mix Unibond I gradually add the powder to the liquid in small
amounts while stirring with an old kitchen wire whisk.
On Aug 9, 3:43 pm, Art Greenberg <[email protected]> wrote:
> On Thu, 9 Aug 2007 10:15:36 -0700, Lew Hodgett wrote:
>
> > "Art Greenberg" wrote:
>
> > > Maybe mixing in smaller batches is a good idea. But is there a
> > > reasonable way to mix a large batch and not have this happen?
We use it a bunch at work and I've had the same problem. What I do
now is put all of the powder and about 1/3 of the liquid into the
mixing cup and stir it until it's nice and creamy. Then I add the
rest of the liquid and stir it until mixed. I've found that to be the
quickest and easiest way for me.
We're actually using a new product now that uses water as a catalyst
(?). It smells a whole lot better and the results are seemingly
identical. I can't think of the brand name right now. Wait - it's
PPR and it's a precatalyzed powder urea resin adhesive. It says that
water is needed to reconstitute the powder resin. IAE, I haven't done
any research as to which is "better", but I prefer the PPR thus far.
JP
"Art Greenberg" wrote:
> Maybe mixing in smaller batches is a good idea. But is there a
> reasonable way to mix a large batch and not have this happen?
Slowly add dry to liquid while mixing.
Without question, best mixer available is the "Jiffy Mixer" made here in
SoCal.
Chuck one up in a drill and go to work.
Lew
On Thu, 9 Aug 2007 10:15:36 -0700, Lew Hodgett wrote:
>
> "Art Greenberg" wrote:
>
> > Maybe mixing in smaller batches is a good idea. But is there a
> > reasonable way to mix a large batch and not have this happen?
>
> Slowly add dry to liquid while mixing.
>
> Without question, best mixer available is the "Jiffy Mixer" made here in
> SoCal.
>
> Chuck one up in a drill and go to work.
>
> Lew
Cool! Found them on the web. I had no idea there was a deivce like that
available for mixing in small containers. Thanks for tip, Lew.
--
Art Greenberg
artg at eclipse dot net
On Thu, 09 Aug 2007 15:02:58 -0700, Jay Pique wrote:
> On Aug 9, 3:43 pm, Art Greenberg <[email protected]> wrote:
> > On Thu, 9 Aug 2007 10:15:36 -0700, Lew Hodgett wrote:
> >
> > > "Art Greenberg" wrote:
> >
> > > > Maybe mixing in smaller batches is a good idea. But is there a
> > > > reasonable way to mix a large batch and not have this happen?
>
> We use it a bunch at work and I've had the same problem. What I do
> now is put all of the powder and about 1/3 of the liquid into the
> mixing cup and stir it until it's nice and creamy. Then I add the
> rest of the liquid and stir it until mixed. I've found that to be
> the quickest and easiest way for me.
OK ... so its able to dissolve the catalyst at that high concentration.
Good to know.
> We're actually using a new product now that uses water as a catalyst
> (?). It smells a whole lot better and the results are seemingly
> identical. I can't think of the brand name right now. Wait - it's
> PPR and it's a precatalyzed powder urea resin adhesive. It says that
> water is needed to reconstitute the powder resin. IAE, I haven't
> done any research as to which is "better", but I prefer the PPR thus
> far.
>
> JP
I have some of that, too. I haven't tried it yet. Should have used it on
this project. But I have half a gallon of the Unibond yet, and it
doesn't have an infinite shelf life.
More than the smell, I find the UF bothers my eyes a little, even with
fair ventilation. I use a respirator. SWMBO can't stand to be in the
shop when I'm using it, even when she has her respirator on.
--
Art Greenberg
artg at eclipse dot net
"Art Greenberg" wrote:
> Cool! Found them on the web. I had no idea there was a deivce like that
> available for mixing in small containers. Thanks for tip, Lew.
SFWIW,
Chucked up a 1 gal Jiffy in a 3/8" variable speed drill, then added a foot
switch and a wooden bracket screwed into a wall.
Now have a foot operated mixer that works just like a milk shake mixer.
Mixed up over 400 gallons of epoxy to build a boat with it.
Have fun.
Lew
You can also modify the wire whisk so you can chuck it in an electric
drill. OK, I confess, I'm too cheap to buy a mixer and DO use this in the
kitchen.
Joey <[email protected]> wrote in news:1186672122.980478.174220
@o61g2000hsh.googlegroups.com:
Art commented about mixing Unibond in large batches:
>> Maybe mixing in smaller batches is a good idea. But is there a
>> reasonable way to mix a large batch and not have this happen?
>>
>> Thanks.
>>
>> --
>> Art Greenberg
>> artg at eclipse dot net
>
> When I mix Unibond I gradually add the powder to the liquid in small
> amounts while stirring with an old kitchen wire whisk.
>
>