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Industrial chemist too fact check Please!!
Or anybody else actually.
I’ve just been informed by my learned host(People I stay with while in Smelly Melbourne).
That the activator used in the settings process of CA Cyanoacrylate glue, used too finish small items like Pens extra is just Bi Carb of soda mixed with water.??
Is this true, we have been using the F an poo word to discuss the fact, hence we, well me, am seeking a higher opinion.
Matt
I am not much of a chemist, not much of anything really, but this is from Wikipedia
Filler[edit]
When added to baking soda (sodium bicarbonate), cyanoacrylate glue forms a hard, lightweight adhesive filler. This works well with porous materials that do not work well with the adhesive alone. This method is sometimes used by aircraft modelers to assemble or repair polystyrene parts. It is also used to repair small nicks in the leading edge of wood propeller blades on light aircraft,[11] although this technique is limited to use on aircraft registered in the "experimental" category (composite propellers can be repaired in a similar way using two-part epoxies[12]). This technique can also be used to fill in the slots in the nut of a guitar so that new ones can be cut. The reaction between cyanoacrylate and baking soda is very exothermic (heat-producing) and also produces noxious vapors.
This is the full article on CA glues;
Cyanoacrylate - Wikipedia
It mentions that water, or rather moisture, is the catylist for hardening and bicarb is more for a filler product.
Regards
Paul
Most material safety data sheets (MSDS) for the common aerosol CA Activators list Acetone as the solvent, LPG as the propellant and other "trade secret" ingredients 0.1-0.5%.
Pump packs like Starbond state - Organic Activator 0-4% & Organic Solvent 50-100% with the formulation CAS numbers (a unique number to a given compound) "trade secret."
Good luck finding out what the secret herbs and spices are. :D
THANK YOU Paul, I may be eating out of the dog bowl while in Melbourne [emoji3064].Quote:
Originally Posted by Bushmiller
Ok I have some light reading this evening too do.
Cheers Matt.
I have used bicarb & superglue to create a fillet to strengthen a joint. Works well.
Here is a test using just water:https://www.youtube.com/watch?v=ikEXNtvjQw8&feature=youtu.be
An amine of N,N-Dimethyl-p-toluidine carried in acetone, heptane or ethanol alcohol. The last three are just solvents and quickly evaporate off, as we know :)
This nasty sounding sauce is used by dentists to harden the plastics after moulding.
Nothing from the kitchen sink, unfortunately.
Edit - I have the sneaking suspicion this may also be used by the beauty industry for acrylic fingernails and repairs. How curious. Something to look up....
I note that David from Timberbits recommended Glen20 at one point....
I have used this with some success - I wonder what their secret ingredient is ?
It did not work at all for me! I've found the most suitable CA accelerator to be NCF, expensive but very good.Quote:
Originally Posted by plt43
NCF has tolerable fumes, not that I expose myself to them. I find accelerators from BSI etc have a cheap & nasty perfume to mask the CA and accelerator fumes. Horrible stuff!!!
Soudal's "mitre kit" pack has a good accelerator product but an awful applicator nozzle - its splutters and spits, making it a hit and miss process if applying CA as a pen finish. Fortuately, the cans accept an NCF cans nozzle - problem solved!
G'Day Matt, I've been using a range of Starbond CA Glue along with their accelerator; works a treat.
I've noticed from time to time on news letters from them people ask question and or advice about what and how to use which one of their glues.
Maybe be worth asking them, Cheers Peter
Cyanoacrylate Glue | CA Glue | Cyanoacrylate Adhesive | Starbond Premium Super Glue
NCF Quick is N,N,4-trimethyl-Benzenamine
Its the same stuff as all the others* (i.e. no additional magic sauces)
On a side note, out of curiosity, I found some N,N-Dimethyl-p-toluidine for sale in small quantities in Japan. It normally sold in bulk (at CONSIDERABLE discount 500ml is $266)... but who needs 2.5 litres of it? Really!
The sprays are 2% sauce, mixed with the carrier/solvent. These amines wont mix with water (miscibility) but do in ethanol or acetone. 100% Ethanol is buy-able in bulk very cheaply from SydneySolvents.com.au (20L is $80)
Lets pretend we are going to do a bulk group buy :) .... numbers come in at a 2% solution (not including a fftt-fftt spray canister, postage)... $9.72 a litre.
So those 170ml cans of NCF quick @ ~$38 contain about $1.65 of fluid (and that's at retail buying of the ingredients!). So, the "expense" of the product is all down to the perceived value of the brand and little to do with the costs of manufacturing it.
If David from Timberbits were keen, this is entirely a doable project! A rent-a-chemist could do all the work (mix, bottle, certify) for him.
This is what our mystery substance looks like!
Attachment 521961
* also goes by the names of n,n-dimethyl-p-toluidine, dimethyl-p-toluidine, benzenamine, n,n,4-trimethyl, n,n-dimethyl-4-methylaniline, n,n-dimethyl-para-toluidine, 4,n,n-trimethylaniline, dimethyl-4-toluidine, p-dimethylamino toluene, n,n-dimethyl-p-tolylamine, n,n,4-trimethylbenzenamine
I'm going to sound really boring here!Quote:
Originally Posted by crowie
Starbond Accelerator, being a MSDS "trade Secret" and a "proprietary chemistry" is simply the declared CAS 99-97-8
Same stuff. No change.
Attachment 521963
Attachment 521964
The niceness comes down do perfumes and scents :) Our hire-a-chemist can add a little aromatics into it to sweeten it up.... although we DON'T want it to smell like Another Womans perfume :oo::D:B:B
200ml of Hafele Aktivator is very good. I used it on all my pens (which I should continue to make!).
Curiosity gripped me, so I checked the MSDS and their preparation is 0.3 to 1% N,N-dimethyl-p-toluidine
I can buy these for $8.20 on account.
It did NOT bloom, or cause the White Spots Of Misery. Pretty sure I posted many years ago with the number of pens per can (I marked the cans with # of puffs per pen)... i should look that up, but it was large, something akin to 50 or 75 pens.
I rate this product highly (but then again, its the SAME as everyone else's, chemically!)
Um errrrr ye right ok, I’m starting too see why I’m not an industrial chemist, but I do really appreciate the input an effort.Quote:
Originally Posted by woodPixel
Anyone need something hit with a hammer give me a call.
Cheers Matt.
the guy is a little dry but seems to know his stuff (from a chemistry point of view) and also explains other glues and compounds
https://www.youtube.com/watch?v=1hY1jyGNzIo
Dont get bamboozled.Quote:
Originally Posted by Simplicity
The magic ingredient is an "amine". An amine is a compound of Nitrogen.
It long name isn't terribly relevant, just that the ingredient is available as a pure, cheap and easily managed way. Its a clear or white liquid that is stable at room temperatures. One wouldn't want to drink it. It isnt particularly cancerous or dangerous, but this can be said of anything we work with - greater exposures is greater risks.
We can make this stuff easily. No special precautions are needed, other than a fume cupboard (purely for safety) and protective gear (again, purely for safety).
2% of magic sauce. 98% in highly evaporative juices.
Put it into an ordinary spray bottle like one would use for perfume. Absolutely no need for pressurised cans.
I'm finding it a bit hard to rationalise why its so expensive to buy as a product. The only real thing I can think of is its a very slow seller (no real demand).
I remember reading that anything which is basic will cause it to set. I used to make my own bicarb soda mixture but found that it also reacts with the wood causing it to darken.
Ive also heard people use isopropyl alcohol and i remember trying it one time but dont remember if it worked or not
We can say that about any low turn over or low volume retail product. Apart from the associated dangerous goods compliance for transport, & storage etc we are really paying for the convenience of purchasing small retail quantities when we require it. We are avoiding the issues associated with purchasing, handling, storage, hazard management, risk mitigation, dangerous goods compliance, potential insurance refusal/s etc.Quote:
Originally Posted by woodPixel