Yes West Systems 105-205/206 epoxy relies on stoichiometric reaction... Quoting Ben Diss <[EMAIL PROTECTED]>:
> I wonder if West Systems is the same way? I know the mix ratio is critical. > > > > dharban wrote: > > >I have used this stuff and it is great. A word of warning, however, the > >mixing ratio on this stuff is more critical than most of the epoxies you > >are used to working with. The first batch I mixed did not set up -- > >ever!! > > > >I visited with ACP and they referred me to their supplier and I learned > >that this epoxy depends on a stoichiometric reaction rather than a > >catalytic reaction. That means the respective amounts of parts A and B > >react completely with each other and if the ratio is off by very much > >unreacted component will remain in the mix for the part which is in > >excess of the required ratio. Most epoxies we work with have a more or > >less catalytic reaction which means that you have more leeway on the > >ratio of hardener to resin. > > > >Having had to clean up after a batch that did not "go off" I would > >strongly recommend taking pains to 1) get the ratio right and 2) > >thoroughly mix the components. > > > > > > > > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and > "unsubscribe" requests to [EMAIL PROTECTED] Please note that > subscribe and unsubscribe messages must be sent in text only format with MIME > turned off. Email sent from web based email such as Hotmail and AOL are > generally NOT in text format > Radius Systems Cogito Ergo Zoom RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
