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2016-05-22 05:23 <wpwrak> nice to have products in your household where they print the LD50 on the package ;-)
2016-05-22 05:23 <wpwrak> at least better than the blast radius, i guess
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2016-05-22 07:05 <whitequark> good bunch of those too
2016-05-22 07:33 <wpwrak> note to experimental cosmologists: please declare any experiments with a blast radius exceeding 1 gigaparsec before the competent authorities
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2016-05-22 12:00 <DocScrutinizer05> well, on that glue they don't. I googled and got that security asessment for the substance
2016-05-22 12:02 <DocScrutinizer05> seems to me that stuff cures with water just like cyanoacrylat does
2016-05-22 12:05 <DocScrutinizer05> way slower though, plus I dunno but when it's diluted enough in water, aiui it doesn't build polymeres anymore, which seems to suggest you can rinse it off with lots of water until it cures and then it's water resistent
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2016-05-22 20:26 <arossdotme> knwo of any small/action camera sized 1080p or maybe even 2k+ :) cameras are there that are floss and maybe even copyleft hardware? diy 1080p webcam+tiny computer?
2016-05-22 20:27 <arossdotme> neo900 :) heh?
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2016-05-22 20:45 <whitequark> DocScrutinizer05: that glue is based on an alkoxysilane
2016-05-22 20:47 <DocScrutinizer05> when that's the generic term for N-(3-(Trimethoxysilyl)propyl)ethylendiamin
2016-05-22 20:47 <whitequark> the mechanism is that hydrolysis produces silanols, which condenses with other silanols. when you dilute them, the result is that you get lower molecular weight polymers
2016-05-22 20:47 <whitequark> yeah
2016-05-22 20:47 <whitequark> oh noticed that you wrote that
2016-05-22 20:48 <whitequark> I figure you don't need to *wash* it with water, just wait until it cures entirely
2016-05-22 20:48 <DocScrutinizer05> nah, I thought it was water soluble until cured. It's rather not
2016-05-22 20:49 <whitequark> Water solubility 1e-06 mg/l
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2016-05-22 20:49 <whitequark> 1ng/l? hard to get less water soluble
2016-05-22 20:49 <DocScrutinizer05> sounds odd
2016-05-22 20:50 <DocScrutinizer05> even diamant is that 'soluble' in water ;-)
2016-05-22 20:51 <DocScrutinizer05> nanogram, ohmy
2016-05-22 20:52 <DocScrutinizer05> given the complexity of the molecule, it can't be many of them to make one nanogram
2016-05-22 20:52 <whitequark> "estimated; value may be inaccurate because material is hydrolyzed"
2016-05-22 20:54 <DocScrutinizer05> yeah, they define "soluble" as "how much of the original substance can be found in a certain amount of slovent"
2016-05-22 20:54 <DocScrutinizer05> I'm rather interested in "how much of the existing material will vanish over time when treated with a certain amount of solvent"
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2016-05-22 20:56 <whitequark> polysiloxanes are highly insoluble in water
2016-05-22 20:57 <DocScrutinizer05> yes, but the uncured glue is no POLYsiloxane aiui, no?
2016-05-22 20:58 <DocScrutinizer05> it polymerizes with water, and by slitting of methyl froups
2016-05-22 20:58 <DocScrutinizer05> splitting
2016-05-22 20:58 <DocScrutinizer05> off
2016-05-22 20:58 <DocScrutinizer05> ohmy
2016-05-22 20:59 <DocScrutinizer05> it polymerizes with water, and by splitting off methylene
2016-05-22 20:59 <DocScrutinizer05> aiui
2016-05-22 20:59 <DocScrutinizer05> with too much water the polymer chains are short
2016-05-22 21:00 <DocScrutinizer05> thus not creating a decent glue effect
2016-05-22 21:00 <whitequark> I don't understand the precise conditions you are speaking of
2016-05-22 21:00 <DocScrutinizer05> I speak of rinsing uncured glue with water
2016-05-22 21:00 <whitequark> if you mean just "dump glue into water" then it will be so dependent on minute details that you can't make any prediction
2016-05-22 21:01 <whitequark> e.g. the rate of surface area to volume is the major one
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