Cobalt Accelerator

Discussion in 'Wooden Boat Building and Restoration' started by Butch .H, Nov 14, 2008.

  1. Butch .H
    Joined: Apr 2008
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    Butch .H Senior Member

    Hi any advice when using a cobalt accelerator on wood .I need to get polly resin to stick to the ply underlay I have fitted.
    Thank you
     
    Butch .H, Nov 14, 2008
    #1
  2. Eric Sponberg
    Joined: Dec 2001
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    Eric Sponberg Senior Member

    DANGEROUS!

    Cobalt naphthanate (CoNap) is highly reactive. It is meant to be mixed in a batch of neat resin (resin with no other additives) in the proper ratio before any other additive is put in, like catalyst (MEKP, BPO). Consult manufacturers instructions. It is used to control cure time, I don't think it will really affect adhesion.

    CoNap is used on the surface of Airex foam core so that the resin right at the core boundary will start to harden before the styrene in the resin (usually 45% of the mix) starts attacking the core, which otherwise would dissolve.

    Also, CoNap when mixed with catalyst will EXPLODE with disastrous results. DO NOT KEEP CONAP ANYWHERE NEAR CATALYST--THIS IS EXTREMELY DANGEROUS. If you want to blow up and burn down a manufacturing plant, pour some catalyst on top of a drum of resin, then pour CoNap on top of the catalyst. You will not have time to get out of the way!

    Eric
     
    Eric Sponberg, Nov 14, 2008
    #2
    2 people like this.
  3. Fanie
    Joined: Oct 2007
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    Fanie Fanie

    Interesting, thanks Eric !
     
    Fanie, Nov 14, 2008
    #3
  4. Butch .H
    Joined: Apr 2008
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    Butch .H Senior Member

    Thanks Eric.
     
    Butch .H, Nov 15, 2008
    #4

  6. hoytedow
    Joined: Sep 2009
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    hoytedow Carbon Based Life Form

    Old threads like this need to resurface from time to time because they contain nuggets of lifesaving wisdom. Thanks, Eric!
     
    hoytedow, Jan 24, 2012
    #5
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