Re: OT - UV setting Resin question

Jeff Liebermann

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Jan 27, 2022, 6:10:31 AM1/27/22

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On Thu, 27 Jan 2022 06:48:53 +0000, Charlie+ <cha...@xxx.net> wrote:

>https://www.ebay.co.uk/itm/284120960911
(...)
>My guess is that all the advertised 'EPOXY' UV glues on ebay and Amazon
>are actually Acrylic... anyone know better or for sure? C+

UV curing epoxy is quite real. The problem is I don't know what the
eBay vendor is actually selling. I suggest you look at the different
curing instructions for UV curing acrylic and epoxy in the article
below, and try to determine which one matches the product you
purchased.

"UV curing acrylic vs. UV epoxy"
<https://www.galindberg.se/blogg/uv-curing-acrylic-vs-uv-epoxy/>
Two common types of UV curing (light curing) adhesives
are those based on acylate and epoxy. Both are cured
using UV or blue light between 365 nm and 405 nm. The
difference between them lies in their chemistry. Both
the curing process and final properties differ.

Full disclosure: I've worked with UV curable cyanoacrylate adhesive,
but not epoxy.
--
Jeff Liebermann je...@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann

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Jan 27, 2022, 1:52:59 PM1/27/22

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On Thu, 27 Jan 2022 17:46:04 +0000, Charlie+ <cha...@xxx.net> wrote:

>On Thu, 27 Jan 2022 03:10:21 -0800, Jeff Liebermann <je...@cruzio.com>
>wrote as underneath :

>
>>On Thu, 27 Jan 2022 06:48:53 +0000, Charlie+ <cha...@xxx.net> wrote:
>>
>>>https://www.ebay.co.uk/itm/284120960911
>>(...)
>>>My guess is that all the advertised 'EPOXY' UV glues on ebay and Amazon
>>>are actually Acrylic... anyone know better or for sure? C+
>>
>>UV curing epoxy is quite real. The problem is I don't know what the
>>eBay vendor is actually selling. I suggest you look at the different
>>curing instructions for UV curing acrylic and epoxy in the article
>>below, and try to determine which one matches the product you
>>purchased.
>>
>>"UV curing acrylic vs. UV epoxy"
>><https://www.galindberg.se/blogg/uv-curing-acrylic-vs-uv-epoxy/>
>> Two common types of UV curing (light curing) adhesives
>> are those based on acylate and epoxy. Both are cured
>> using UV or blue light between 365 nm and 405 nm. The
>> difference between them lies in their chemistry. Both
>> the curing process and final properties differ.
>>
>>Full disclosure: I've worked with UV curable cyanoacrylate adhesive,
>>but not epoxy.

>Thanks JL yes I know what I've already got! Acrylic - I needed a source
>for genuine UV Epoxy as opposed to the sales speak epoxy which is'nt!
>Reason is the acrylic UV can only set with direct UV, and it doesnt
>stick like epoxy anyway.. but it is ok for some materials mostly
>transparent for obvious reasons.. C+

Compliments of Google search. I don't have any experience with any of
these:
<https://www.epoxies.com/products/uv-curable-illumabond/>
<https://www.epotek.com/products/uv-and-uv-hybrid-epoxies/>
<https://www.threebond.co.jp/en/product/search/?form=category-form&category=Adhesives&featuresfunctions=UV%20curing+UV-LED%20light%20source-curable>
<https://www.polymer-g.com/uv-led-curable-products/uv-led-curable-epoxy/>
More:
<https://www.google.com/search?q=uv+curing+epoxy>

I looked for something on eBay (US) and only found small bottles, with
gaudy labels, claiming to be epoxy, but more likely to be acrylic like
the stuff you purchased. Searching for UV cure resign produced more
of the same. I didn't see any industrial grade products, just lots of
jewelry and arts+craft products. No clue what's available in UK, but
I suspect that you might need to purchase it from the manufacturer or
distributor.

I don't know your application, but you might look at 3D printing UV
curable resin:
<https://www.google.com/search?q=3d+printing+uv+epoxy>
The problem is that I can't tell in most products whether "resin"
refers epoxy, acrylic, urethane, or something else.

Good luck.

Liz Tuddenham

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Jan 28, 2022, 4:21:57 AM1/28/22

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Charlie+ <cha...@xxx.net> wrote:

> On Thu, 27 Jan 2022 10:52:51 -0800, Jeff Liebermann <je...@cruzio.com>
> wrote as underneath :
>
> snip ><https://www.epoxies.com/products/uv-curable-illumabond/>

> ><https://www.epotek.com/products/uv-and-uv-hybrid-epoxies/>
> ><https://www.threebond.co.jp/en/product/search/?form=category-form&catego
> ry=Adhesives&featuresfunctions=UV%20curing+UV-LED%20light%20source-curable
> >
> ><https://www.polymer-g.com/uv-led-curable-products/uv-led-curable-epoxy/>
> >More: ><https://www.google.com/search?q=uv+curing+epoxy>
> >
> >I looked for something on eBay (US) and only found small bottles, with
> >gaudy labels, claiming to be epoxy, but more likely to be acrylic like
> >the stuff you purchased. Searching for UV cure resign produced more
> >of the same. I didn't see any industrial grade products, just lots of
> >jewelry and arts+craft products. No clue what's available in UK, but
> >I suspect that you might need to purchase it from the manufacturer or
> >distributor.
> >
> >I don't know your application, but you might look at 3D printing UV
> >curable resin:
> ><https://www.google.com/search?q=3d+printing+uv+epoxy>
> >The problem is that I can't tell in most products whether "resin"
> >refers epoxy, acrylic, urethane, or something else.
> >
> >Good luck.

> JL Thanks some great links you found, much better than I managed to
> find.. my education on the subject improves!
> So I surmise:
> Only industrial sources and prices - out of bounds for my uses!
> Ultra short shelf life. Hours/Days only.
> Probably actually made from hybrid acrylic/epoxy mixes.
>
> Funnily enough the first thing I tried within a few minutes of getting
> the eBay stuff and realizing it had no epoxy characteristics, was to mix
> some with 5 min epoxy. Fully expecting it to be immiscible, amazed to
> find it mixed fine and worked as a first shot experiment, semi cured
> with UV 365nM immediately and set solid after elapsed time! Nothing
> further done or measured but the potential is definitely there to DIY..
> Might try again with slow set epoxy where an instant semi cure would be
> really useful! Thanks again. C+

See if you can beg some that is reaching its end date from your dentist.

--
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

Chris Jones

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Jan 28, 2022, 6:56:05 AM1/28/22

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On 28/01/2022 21:38, Charlie+ wrote:
> On Fri, 28 Jan 2022 09:21:23 +0000, l...@poppyrecords.invalid.invalid
> (Liz Tuddenham) wrote as underneath :
>
> Snip

>>> JL Thanks some great links you found, much better than I managed to
>>> find.. my education on the subject improves!
>>> So I surmise:
>>> Only industrial sources and prices - out of bounds for my uses!
>>> Ultra short shelf life. Hours/Days only.
>>> Probably actually made from hybrid acrylic/epoxy mixes.
>>>
>>> Funnily enough the first thing I tried within a few minutes of getting
>>> the eBay stuff and realizing it had no epoxy characteristics, was to mix
>>> some with 5 min epoxy. Fully expecting it to be immiscible, amazed to
>>> find it mixed fine and worked as a first shot experiment, semi cured
>>> with UV 365nM immediately and set solid after elapsed time! Nothing
>>> further done or measured but the potential is definitely there to DIY..
>>> Might try again with slow set epoxy where an instant semi cure would be
>>> really useful! Thanks again. C+
>>
>> See if you can beg some that is reaching its end date from your dentist.
>

> Hi Liz - now that is a good interesting suggestion - got an appointment
> on the 31st, I'll ask then! Also brings forth the thaught of mixing
> acrylic UV with glass isonomer as a trial route!! Thanks. C+

What is the green stuff used for solder mask? That is UV-curable and
perhaps it is epoxy. LPKF sells it in little packets like they use for
ketchup or mustard in a fast food restaurant (but much more expensive I
bet...) also it is green by default.

Liz Tuddenham

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Jan 28, 2022, 8:45:11 AM1/28/22

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Charlie+ <cha...@xxx.net> wrote:

> On Fri, 28 Jan 2022 09:21:23 +0000, l...@poppyrecords.invalid.invalid
> (Liz Tuddenham) wrote as underneath :
>
> Snip

> >> JL Thanks some great links you found, much better than I managed to
> >> find.. my education on the subject improves!
> >> So I surmise:
> >> Only industrial sources and prices - out of bounds for my uses!
> >> Ultra short shelf life. Hours/Days only.
> >> Probably actually made from hybrid acrylic/epoxy mixes.
> >>
> >> Funnily enough the first thing I tried within a few minutes of getting
> >> the eBay stuff and realizing it had no epoxy characteristics, was to mix
> >> some with 5 min epoxy. Fully expecting it to be immiscible, amazed to
> >> find it mixed fine and worked as a first shot experiment, semi cured
> >> with UV 365nM immediately and set solid after elapsed time! Nothing
> >> further done or measured but the potential is definitely there to DIY..
> >> Might try again with slow set epoxy where an instant semi cure would be
> >> really useful! Thanks again. C+
> >
> >See if you can beg some that is reaching its end date from your dentist.
>

> Hi Liz - now that is a good interesting suggestion - got an appointment
> on the 31st, I'll ask then! Also brings forth the thaught of mixing
> acrylic UV with glass isonomer as a trial route!! Thanks. C+

I think dentists use epoxy for some repairs and acrylic for others
(judging by the smell) so you will need to check that you get the right
one.

Liz Tuddenham

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Jan 28, 2022, 8:45:11 AM1/28/22

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I seem to remember it smelt like epoxy when I tried soldering through
it.