CA glue---all the same?

[Joe And Penny Goss]

Hi Gregor.
Hypodermic needle = hypo
Just a nickname for thin or small.
My needle is .036" outside diameter.
That would be about 2/3 the size of a size 20 center pin.
Joe Goss RPT
Mother Goose Tools
imatunr at srvinet.com
www.mothergoosetools.com
----- Original Message ----- 
From: "Gregor _" <karlkaputt at hotmail.com>
To: <pianotech at ptg.org>
Sent: Saturday, August 04, 2007 4:24 AM
Subject: RE: CA glue---all the same?


> thank you for the detailed information. But what is a hypo-oiler?
>
> Gregor
>
>
> >From: "Marc Lanthier (Piano Lanco)" <info at pianolanco.com>
> >Reply-To: Pianotech List <pianotech at ptg.org>
> >To: "'Pianotech List'" <pianotech at ptg.org>
> >Subject: RE: CA glue---all the same?
> >Date: Fri, 3 Aug 2007 20:55:47 -0400
> >
> >CA (cyanoacrylate) glue is basically made of two products: ethyl
> >cyanoacrylate and polymethylmethacrylate. Their ratios, in the final
> >product, determine their degree of polymerization and also their
> >viscosities. CA glues react to moisture ie. that's how it sets. The
vapors
> >of these 2 chemicals are extermely irritating to the airways. If you do
not
> >turn you head aways form the fumes as a reflex, most likely the glue has
> >begun to polymerize and its "active" ingredients are depleted
accordingly.
> >
> >There are many "recipes" to super glues. The trick is to find the correct
> >viscosity (for pinblocks: as thin as it comes which is about 2
centipoise -
> >water is 1 cps). Also you have to make sure it hasn't been sitting on the
> >shelf for months - fresher is better. Polymerisation is slowed by cooling
> >but its viscosity will increase - so store in a fridge and warm to room
> >temp
> >before use.
> >
> >You might think that dissolving the glue in a solvent (such as acetone)
to
> >reduce its viscosity and make it creep more is a solution - but beware
that
> >most solvents that are appropriate to dilute such a polar mixture are
also
> >very prone to absorb water - which promotes its curing (acetone might
have
> >as mush as 10 % water content).
> >
> >So I suggest to try to find a supplier which has a high turn around. To
do
> >this, you might want to note the lot number on the package and go back a
> >few
> >weeks later to see if it's still the same lot on the shelf. Also, buy as
> >small containers as possible because as soon as you break open the spout,
> >you will introduce moisture - tenfold more if you transfer it to a
> >hypo-oiler - so use quickly.
> >
> >To say to buy a specific brand, in my opinion, is misleading since it
could
> >be a great product if used fresh but could have been sitting on the
> >distributor's shelf for 6 months or more.
> >
> >That's all that I have to say about CA adhesives for now,
> >
> >
> >Thanks,
> >
> >Marc Lanthier
> >Piano Lanco
> >514-770-7438
> >1-877-PIANO10
> >info at pianolanco.com
> >www.pianolanco.com
> >
> >   _____
> >
> >From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On
> >Behalf
> >Of Tom Sivak
> >Sent: August 2, 2007 9:25 PM
> >To: Pianotech List
> >Subject: Re: CA glue---all the same?
> >
> >
> >I didn't think it was a thickness problem.  It appears to the eye to be
as
> >watery as the ultra-thin stuff.  Maybe the difference between thin and
> >ultra-thin is enough to make it work or not?
> >
> >But pinblock plugs?  On a 75 year old Starck spinet?
> >
> >I guess my question might really be: are there different strengths of CA
> >glue?  Different formulae?  Or is CA glue just CA glue, period?
(Thickness
> >or thinness aside)
> >
> >Tom
> >
> >John Ross <jrpiano at win.eastlink.ca> wrote:
> >
> >The Loctite might be thicker, therefore unable to travel.
> >A hobby shop usually has a fast turn over. so it should be fresh stuff.
Be
> >sure and get the ultra-thin stuff, and get the super fine tips they have
> >that fit on the bottle, usually in packs of 5.
> >Wear a respirator if it bothers you, and get lots of ventilation in the
> >area.
> >I have never had the c/a glue fail me.
> >The only place I can see where it wouldn't work, would be on a split, or
> >separated pinblock.
> >In that case, if it were only a few, I would try pinblock plugs. They are
> >available from Webb Phillips, in two sizes.
> >John M. Ross
> >Windsor, Nova Scotia, Canada
> >jrpiano at win.eastlink.ca
> >
> >----- Original Message -----
> >From: Tom  <mailto:tvaktvak at sbcglobal.net> Sivak
> >To: pianotech <mailto:pianotech at ptg.org>
> >Sent: Thursday, August 02, 2007 9:02 PM
> >Subject: CA glue---all the same?
> >
> >List
> >
> >Is there any difference in the quality of various brands of CA glue?
> >
> >I have been using Lock-Tite Super Glue, and whereas it seems to work fine
> >for various repairs, I have had a couple of pinblock treatments that
didn't
> >take.  I used A LOT of it, too.  It seems as thin a viscosity as the glue
> >available from Schaff or the local hobby shop, so I don't think that is
the
> >problem.  I've been buying it because it's available at the hardware
store
> >down the street, and I like that it comes in such small bottles.
> >
> >But I've noticed that my eyes don't water when I use it.  Today I bought
a
> >different brand of CA from the hobby shop, and man! I had to leave the
area
> >for awhile, it was so gaseously toxic!
> >
> >I had initially thought that the last two pinblocks were just too far
gone
> >and that the glue couldn't make an impact.  Now, I'm starting to think
that
> >the Lock-Tite glue might be weaker.
> >
> >Any thoughts?
> >
> >Thanks,
> >Tom Sivak
> >Chicago
> >
> >
>
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