CA Glue

[Avery Todd]

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John,

I'm glad your eyes are better than mine. I guess it's an "old age" 
kind of thing!:-)

At 04:15 PM 8/17/05, you wrote:
>As to the first point, Susan, NO!! (Thankfully!)  To quote a Ph.D. 
>in the field (I'm more food/flavor chemistry):
>
>
>Cyanoacrylate glues contain the group H2C=CH-CN: Where the = 
>represents a double bond between two carbons and there is a triple 
>bond between the carbon and nitrogen of the CN. CN is the 'cyano' 
>group, and a three-carbon chain with a double bond next to another 
>type of multiple bond (or some other form of electron rich group 
>such as a radical or anion) is an 'acrylic' group -- the combination 
>gives a relatively high reactivity to the compounds and allows them 
>to polymerize like a plastic. Many non-toxic compounds contain both 
>types of groups, and many medicines have cyano groups. Along with 
>this group, there are other chemicals and can be other chains 
>attached to that cyanoacrylate group in place of one or more of the hydrogens.
>
>There is NO, NONE, NADA cyanide released on curing these glues and 
>hardening. There are some obnoxious fumes released -- some of them 
>just parts that boil out from the heat of the curing reaction. BUT, 
>whenever an organic chemical that contains nitrogen is burned, some 
>cyanogen/hydrogen cyanide is released. This happens with tobacco, 
>meat, veggies, fireplace wood, etc. This release is worst when there 
>is not enough oxygen present in the burning zone to ensure complete 
>combustion -- so if there is a lot of smoke formation, there is more 
>likelyhood of cyanide formation.
>
>Sorry if that's more chemistry than you wanted, but I think it makes 
>the point.  Watch out for smoking rags, etc!
>
>To the "kicker" issue, I assume that's an accelerant?  Anything with 
>water (a VERY WEAK lye solution would be better) is going to 
>work.  Elmer's may just be getting in the way of the 
>polymerization.  How is the smell irritating (acrid, ammonia, 
>etc)?  That may give some indication of what's going on.
>
>John Delmore

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