• OT - UV setting Resin question

    From Charlie+@21:1/5 to All on Thu Jan 27 06:48:53 2022
    Anyone happen to really know about this stuff?
    I baught my example from ebay: https://www.ebay.co.uk/itm/284120960911?ssPageName=STRK%3AMEBIDX%3AIT&var=585619831920&_trksid=p2060353.m2749.l2649

    Says its epoxy resin in the ad. and it sets (hot) hard almost instantly
    with strong UV, quite useful but its not epoxy and doesnt stick like
    epoxy! Its Acrylic - it even says so on the bottle. Iv used other UV
    gloops in the past from China and they are softer setting types and
    definitely Acrylic.
    I do know that epoxy UV set glue is available industrially, they use UV
    to kickstart and then continue setting for a time afterwards. However my
    guess is that these real epoxy types are probably very expensive and not
    for general use!
    Asked the seller and got the answer roughly, "well we have no complaints
    and we sell loads of it" !
    My guess is that all the advertised 'EPOXY' UV glues on ebay and Amazon
    are actually Acrylic... anyone know better or for sure? C+

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  • From Jeff Liebermann@21:1/5 to charlie@xxx.net on Thu Jan 27 03:10:21 2022
    On Thu, 27 Jan 2022 06:48:53 +0000, Charlie+ <charlie@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 jeffl@cruzio.com
    PO Box 272 http://www.LearnByDestroying.com
    Ben Lomond CA 95005-0272
    Skype: JeffLiebermann AE6KS 831-336-2558

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  • From Charlie+@21:1/5 to All on Thu Jan 27 17:46:04 2022
    On Thu, 27 Jan 2022 03:10:21 -0800, Jeff Liebermann <jeffl@cruzio.com>
    wrote as underneath :

    On Thu, 27 Jan 2022 06:48:53 +0000, Charlie+ <charlie@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+

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  • From Jeff Liebermann@21:1/5 to charlie@xxx.net on Thu Jan 27 10:52:51 2022
    On Thu, 27 Jan 2022 17:46:04 +0000, Charlie+ <charlie@xxx.net> wrote:

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

    On Thu, 27 Jan 2022 06:48:53 +0000, Charlie+ <charlie@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.

    --
    Jeff Liebermann jeffl@cruzio.com
    PO Box 272 http://www.LearnByDestroying.com
    Ben Lomond CA 95005-0272
    Skype: JeffLiebermann AE6KS 831-336-2558

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  • From Charlie+@21:1/5 to All on Fri Jan 28 08:26:06 2022
    On Thu, 27 Jan 2022 10:52:51 -0800, Jeff Liebermann <jeffl@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&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.
    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+

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  • From Liz Tuddenham@21:1/5 to charlie@xxx.net on Fri Jan 28 09:21:23 2022
    Charlie+ <charlie@xxx.net> wrote:

    On Thu, 27 Jan 2022 10:52:51 -0800, Jeff Liebermann <jeffl@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

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  • From Charlie+@21:1/5 to Liz Tuddenham on Fri Jan 28 10:38:23 2022
    On Fri, 28 Jan 2022 09:21:23 +0000, liz@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+

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  • From Chris Jones@21:1/5 to All on Fri Jan 28 22:55:52 2022
    On 28/01/2022 21:38, Charlie+ wrote:
    On Fri, 28 Jan 2022 09:21:23 +0000, liz@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.

    --- SoupGate-Win32 v1.05
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  • From Liz Tuddenham@21:1/5 to charlie@xxx.net on Fri Jan 28 13:44:39 2022
    Charlie+ <charlie@xxx.net> wrote:

    On Fri, 28 Jan 2022 09:21:23 +0000, liz@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 ~
    (Remove the ".invalid"s and add ".co.uk" to reply)
    www.poppyrecords.co.uk

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  • From Liz Tuddenham@21:1/5 to Chris Jones on Fri Jan 28 13:44:39 2022
    Chris Jones <lugnut808@spam.yahoo.com> wrote:

    On 28/01/2022 21:38, Charlie+ wrote:
    On Fri, 28 Jan 2022 09:21:23 +0000, liz@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.

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


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

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)