Talk Composites - The Forum for Advanced Composites

Vinylester surface prep prior to epoxy

http://www.talkcomposites.com/Topic39991.aspx

By gegibsonjr - 3/24/2021 4:31:31 AM

I have a carbon fiber race canoe that was originally constructed using vinyl ester. The hull is being patched using epoxy and carbon and then refinished with and epoxy/ graphite mixture.  I have seen information the mentions a wash/ surface prep is required prior to using the epoxy.  I haven't been able to locate any information on what is required for the prep.  THank you in advance for any and all assistance.

Gary
By Hanaldo - 3/27/2021 4:59:33 AM

Vinyl ester is easier to bond to than epoxy, it has quite an active surface energy. But really I treat all panels the same, whether I'm bonding to polyester/vinyl ester/epoxy/phenolic/plastic, etc. Same prep-work, then an appropriate adhesive/resin. Plastics can be difficult, but everything else works provided the prep is right and the adhesive/resin is appropriate.