Resorcinol resin adhesive?

"David Anderson"writes:

> One dealer said
> resorcinol is now "obsolete".

Absolute bull crap.

Resorcinol is alive and well.

Try an industrial lumber wholesaler.

They may not sell directly to you but should be able to point you in the
right direction.

BTW, unless these are white oak laminations, you might be able to use epoxy.


--
Lew

S/A: Challenge, The Bullet Proof Boat, (Under Construction in the Southland)
Visit: <http://home.earthlink.net/~lewhodgett> for Pictures

Others have told you where to find it. You do know that it leave purplish
glue lines?

"David Anderson" <[email protected]> wrote in message
news:[email protected]...
> I am having a problem in finding a local supplier in the Dallas/Ft Worth
> area of resorcinol resin adhesive use in making up bent laminations from
> thin stock. As I recall, it was once used in making aircraft propellers
> from laminated stock, obviously a high-tech application. One dealer said
> resorcinol is now "obsolete". Any comments? If it is fact obsolete,
what
> is the current choice for high-tech/high-stress applications? He claimed
> polyurethane (Gorilla glue). Thanks, Dave
>
>

Tue, Jun 22, 2004, 5:11pm (EDT+4) [email protected]
(David=A0Anderson) says:
I am having a problem in finding <snip>

Google. That doesn't work, local telephone book. And, a
telephone.

But, I find it interesting you don't actually say what you want it
for. Just, "making up bent laminations from thin stock". I'd say
regular wood glue'd probably do. If it's cold-moulding a boat, or a
bathtub, I might go for epoxy. If it's for an airplane propellor, I
don't like flying anymore, so I wouldn't be making one in the first
place.

JOAT
Use your brain - it's the small things that count.
- Bazooka Joe

Great glue, have you checked Elmer's? That's what my brand is.

David Anderson wrote:
>
> I am having a problem in finding a local supplier in the Dallas/Ft Worth
> area of resorcinol resin adhesive use in making up bent laminations from
> thin stock. As I recall, it was once used in making aircraft propellers
> from laminated stock, obviously a high-tech application. One dealer said
> resorcinol is now "obsolete". Any comments? If it is fact obsolete, what
> is the current choice for high-tech/high-stress applications? He claimed
> polyurethane (Gorilla glue). Thanks, Dave

To reply to JT's post, my intended purpose is to make continuous bow-back
and arms for Windsor chair construction.
That requires bending in two planes, and because of the generally small,
graceful proportions, the sections are correspondingly light - say around
11/16 x 1 inch. After allowing for 7/16-inch drilling to pass the spindles,
there is not much left for error. In the past, I've made them from solid
green hickory just like the 18th century chairmakers did, but green hickory
is hard to find around here. Even two hours in my steam chamber at 15 psi
if the white oak is air dried is not enough to bend without failures.
Lamination works fine, but the glue joints have got to be high quality.
Resorcinol resin meets MIL spex, but few hobby dealers or Home Depot types
will stock it because of the high price. Boat builders will have it, so I
guess it is a mail-order task for me. But, thanks for the discussion.
Dave

"David Anderson" <[email protected]> wrote in
news:[email protected]:

> I am having a problem in finding a local supplier in the Dallas/Ft
> Worth area of resorcinol resin adhesive use in making up bent
> laminations from thin stock. As I recall, it was once used in making
> aircraft propellers from laminated stock, obviously a high-tech
> application. One dealer said resorcinol is now "obsolete". Any
> comments? If it is fact obsolete, what is the current choice for
> high-tech/high-stress applications? He claimed polyurethane (Gorilla
> glue). Thanks, Dave
>
>
>

Unibond 800? Used by folks I trust...

Patriarch

David Anderson wrote:

> I am having a problem in finding a local supplier in the Dallas/Ft Worth
> area of resorcinol resin adhesive use in making up bent laminations from
> thin stock. As I recall, it was once used in making aircraft propellers
> from laminated stock, obviously a high-tech application. One dealer said
> resorcinol is now "obsolete". Any comments? If it is fact obsolete,
> what
> is the current choice for high-tech/high-stress applications? He claimed
> polyurethane (Gorilla glue). Thanks, Dave

Most "high tech" applications these days don't use wood for anything but
decor, so adhesives used in those applications wouldn't necessarily be
particularly good for bonding of wood.

The most accessible brand is probably Weldwood Resorcinol Glue--if you
froogle that you'll get several hits. I note that Aircraft Spruce
<http://www.aircraftspruce.com/catalog/wppages/resorcinol.php> and Wicks
Aircraft
<http://www.wicksaircraft.com/catalog/product_cat.php/subid=38/index.html>
have it for 15 bucks a pint, about a third less than Jamestown. I find
that interesting--Jamestown caters to the boatbuilding market, while Wicks
and Aircraft Spruce cater to the homebuilt aircraft market--I'd expect them
to be higher. Wicks and Aircraft Spruce are both old, established
companies--you're safe ordering from either.

Resorcinol glue is hardly obsolete, just specialized.

--
--John
Reply to jclarke at ae tee tee global dot net
(was jclarke at eye bee em dot net)

David,

The preferred wood for steam-bending applications like windsor chair backs -
in UK, at least - is ash. The greener, the better.

Apropos the original question, I recently used resorcinol to build up a
laminated tiller for a yachtsman friend (English Oak & Teak laminations)

Cheers

Frank

"David Anderson" <[email protected]> wrote in message
news:[email protected]...
> To reply to JT's post, my intended purpose is to make continuous bow-back
> and arms for Windsor chair construction.
> That requires bending in two planes, and because of the generally small,
> graceful proportions, the sections are correspondingly light - say around
> 11/16 x 1 inch. After allowing for 7/16-inch drilling to pass the
spindles,
> there is not much left for error. In the past, I've made them from solid
> green hickory just like the 18th century chairmakers did, but green
hickory
> is hard to find around here. Even two hours in my steam chamber at 15 psi
> if the white oak is air dried is not enough to bend without failures.
> Lamination works fine, but the glue joints have got to be high quality.
> Resorcinol resin meets MIL spex, but few hobby dealers or Home Depot types
> will stock it because of the high price. Boat builders will have it, so I
> guess it is a mail-order task for me. But, thanks for the discussion.
> Dave
>
>


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David Anderson wrote:

> To reply to JT's post, my intended purpose is to make continuous bow-back
> and arms for Windsor chair construction.
> That requires bending in two planes, and because of the generally small,
> graceful proportions, the sections are correspondingly light - say around
> 11/16 x 1 inch. After allowing for 7/16-inch drilling to pass the
> spindles,
> there is not much left for error. In the past, I've made them from solid
> green hickory just like the 18th century chairmakers did, but green
> hickory
> is hard to find around here. Even two hours in my steam chamber at 15 psi
> if the white oak is air dried is not enough to bend without failures.
> Lamination works fine, but the glue joints have got to be high quality.
> Resorcinol resin meets MIL spex, but few hobby dealers or Home Depot types
> will stock it because of the high price. Boat builders will have it, so I
> guess it is a mail-order task for me. But, thanks for the discussion.

I'm a little puzzled as to why you need a glue that will stand several hours
immersed in boiling water for a chair.

And Resorcinol doesn't "meet MIL spex", it meets a certain specific mil-spec
that was created around its properties. There are epoxies, urethanes,
cyanoacrylates, anaerobics, and silicones that meet various MIL specs as
well. I would be very surprised if there was not a military specification
for white glue considering how commonly it is used.

> Dave

--
--John
Reply to jclarke at ae tee tee global dot net
(was jclarke at eye bee em dot net)

David Anderson wrote:

> ....snip
>>
>> I'm a little puzzled as to why you need a glue that will stand several
> hours
>> immersed in boiling water for a chair.
>>
> No, no way, hell no! The two hour's in the steam chamber was for solid
> wood
> prior to bending attempts. Glued up lamination is a substitute for solid
> wood..

In that case you don't need resorcinol glue--its major advantage over epoxy
is that it holds up in boiling water.

--
--John
Reply to jclarke at ae tee tee global dot net
(was jclarke at eye bee em dot net)

On Tue, 22 Jun 2004 17:11:52 GMT, "David Anderson"
<[email protected]> wrote:

>I am having a problem in finding a local supplier in the Dallas/Ft Worth
>area of resorcinol resin adhesive use in making up bent laminations from
>thin stock. As I recall, it was once used in making aircraft propellers
>from laminated stock, obviously a high-tech application. One dealer said
>resorcinol is now "obsolete". Any comments? If it is fact obsolete, what
>is the current choice for high-tech/high-stress applications? He claimed
>polyurethane (Gorilla glue). Thanks, Dave
>



I don't thing I'd trust gorilla glue for a high vibration high stress
critical application like propellers. GG has the disadvantage of
hiding voids without strengthening them, and at it's best it doesn't
seem (to my unscientifically tested gut feeling) to be anywhere as
strong or to have as good adhesion.

"J. Clarke" writes:

> In that case you don't need resorcinol glue--its major advantage over
epoxy
> is that it holds up in boiling water.

For me the biggest advantage is increased open time.

BTW, forget epoxy with white oak.


--
Lew

S/A: Challenge, The Bullet Proof Boat, (Under Construction in the Southland)
Visit: <http://home.earthlink.net/~lewhodgett> for Pictures

....snip
>
> I'm a little puzzled as to why you need a glue that will stand several
hours
> immersed in boiling water for a chair.
>
No, no way, hell no! The two hour's in the steam chamber was for solid wood
prior to bending attempts. Glued up lamination is a substitute for solid
wood..