Epoxy Preference?

Discussion in 'Materials' started by die_dunkelheit, Feb 15, 2012.

  1. CatBuilder

    CatBuilder Previous Member

    1
    Don't wreck on topic threads by trolling in them. You are prime for a temporary ban. If it was my forum, you would be on a week's vacation right now.
     
  2. waikikin
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    waikikin Senior Member

  3. peter radclyffe
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    peter radclyffe Senior Member

    one of the biggest mast makers in the world always used resorcinal,
    one dark and stormy night he was lured by an epoxy salesman
    the new 25 metre liverpool schooner was hit by a 600 ton coaster on the chainplates,
    suddenly a sound like a mortgage, er.... gunshot was heard,
    the frightened actors rushed to pump the still dusty bilges,
    no leaks
    strange
    despite 10 metres of freshly crushed bulwarks

    then they saw the sun streaming through the 6 mm gap from keel to truck in the mainmast

    true story
    the mastmaker had to pay to make another mast

    epoxy never again said he,
    had this not happened he might have made the next spars with epoxy which were some of the biggest ever marconi spars

    the true tales of epoxy i have put on some forums have been removed

    it does not have the shock resistance of resorcinal

    heres tom with the weather
     
  4. peter radclyffe
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    peter radclyffe Senior Member

    frosty is as always spot on,he is not a troll
     
  5. PAR
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    PAR Yacht Designer/Builder

    Resorcinol works well, but it's very unlikely the adhesive choice was the issue with the mast. I've seen old resorcinol fail along the glue line, but never epoxy. This assumes both were properly applied on properly prepped stock. I've used both for spars and each has things to consider. I've tended more and more towards epoxy in recent years, as I have much more control and no purple glue line.
     
  6. peter radclyffe
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    peter radclyffe Senior Member

    how many 4 ton spars have you made
     
  7. mydauphin
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    mydauphin Senior Member

    I have never made masts or use resorcinol. Can someone enlighten me?
     
  8. waikikin
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    waikikin Senior Member

    Not hav'n a go but............ how many other masts fitted to a........... vessel that he had rigged........... have been hit by...... a 600 ton coaster right in the......... Chainplates! I quite like resorcinol, brings back memories but haven't used much since the 80s, it's quite nice to use & needs a higher level of fit & workmanship, a neat glue line is a thing of beauty. All the best in your Endeavours from Jeff.
     
  9. archiechefaps42
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    archiechefaps42 Junior Member

    no other

    I have search and search no one speak on epoxy ever one I talk too. say poly is the way to and that from boat buildder
     
  10. CatBuilder

    CatBuilder Previous Member

    That from builder who makes cheap boat.

    Good boat builders use epoxy or vinylester at a minimum.
     
  11. Frosty

    Frosty Previous Member

    It must be hard to accept that you made a mistake on your build, but getting at me all the time for it is not fair. Open a thread on infusion and find out what you did wrong. Or ask Die.

    Im not the only person that read the thread.
     
  12. PAR
    Joined: Nov 2003
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    PAR Yacht Designer/Builder

    Obviously your understanding of the various materials and techniques is quite limited in this regard, as well as grammar and the use of the spell check button. All kidding aside Archie, polyester is the lowest grade of boat building resin, so this should give you an idea of what type of builder you may have spoken to.

    A have several dozen spars under my belt, both under my control or working in someone else's shop. I have a total number of 4 that were massive builds, 2 of these were over 2 tons each, so to directly answer you, none in the 4 ton range. As an engineer, I'm well familiarized with the physical properties of both adhesives.

    Resorcinol (dihydroxy benzene) is an isomer of benzenediol reacted with formaldehyde, though it also can be an organic resin base mixed with potassium hydroxide (not as common). It was invented in the late 1920's and was probably the first truly waterproof adhesive.

    Yep Cat, Joel knows his stuff and actually builds boats too, so the products he sells are actually things he works with too.

    As to how to build a mast and what is epoxy Mydauphin, well this so extensive a set of subjects, it would require a book. Epoxy technique basics are best handled by downloading the "user's guides" from both Westsystem.com and Systemthree.com. The various mast building methods have been previously discussed here and other sites. Since both questions are so broad, I'll leave it at that, though a more refined question maybe helpful (answerable).
     
  13. Yobarnacle
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    Yobarnacle Senior Member holding true course

    Between 1960 and 1966, I built 4 classic moths from plywood. The glue I used was Weldwood ureaformaldehyde powder. Mix with water and clamp and bronze screws. Once dry was waterproof. Never had a joint leak or break. Seems to be out of favor now days. The claim was it was stronger than the wood.
    Are the modern adhesives superior?
    I liked you could clean up with water before it dried. And had a long shelf life in powder form if kept sealed from moisture.
     
  14. CatBuilder

    CatBuilder Previous Member

    What thread? This one?

    http://www.boatdesign.net/forums/ma...-hardener-use-various-temperatures-41385.html

    What mistake? Please elaborate.
    Watch, everyone, as Frosty doesn't even answer the question...

    Still trolling, even in on topic threads. That should be against forum rules.
     

  15. Frosty

    Frosty Previous Member

    Ive told you a dozen times I know nothing of laminating or infusion. I am mechanical engineer, Please--please try to read slower.

    It is you thats feeling intimidated or what ever else is wrong I dont know.

    Now---what do I know about infusion? --thats right FA.

    On that thread you were being told by some one you had done something wrong maybe you have cried to the Admin and removed it now as you are now publicly inviting readers to it.

    Im so tired of you,-- please leave me alone for a while will you
     
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