Bev, I had the same q some time ago in conjuntion with epoxy bleedout. We suspected leakage of Bisphenol, which is not healthy in electronics. Asked a glue sniffer at Loctite (Henkel) and he replied that nearly all epoxies contain Bisphenol A. Alternatives exist but are not of commercial interest, he said. Inge -------------------------------------------------- From: "Bev Christian" <[log in to unmask]> Sent: den 14 May 2010 03:11 To: <[log in to unmask]> Subject: Re: [TN] Halogen free laminate chemistry > Denny, > Thanks for answering, you are the first so far. > > You forgot you can't attach things to TechNet messages. Send the white > paper to me directly, please. > > Our boards have been halogen free for years, but it had nothing to do with > environmental considerations. > > Do all epoxies by definition have to contain bisphenol A? > > Bev > > > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Dennis Fritz > Sent: Thursday, May 13, 2010 8:29 PM > To: [log in to unmask] > Subject: Re: [TN] Halogen free laminate chemistry > > I think all halogen free laminates are tetra-bromo-bisphenol-A free. > However, bisphenol-A is the co-momomer for epoxy, so if they are FR-4 > (epoxy) they must still contain bisphenol-A. I think for flammability > (pass > UL 94-V0) the additives are aluminum oxide, nitrogen or phosphorus > containing organics, etc. > > I have attached the original IPC white paper on halogen free from 2002. I > understand a lot of this was "voted down", as IPC wanted to take a > different > stance toward halogen free for Intel, Dell, HP, and others - who supply > computers graded to the E-Peat scale, where halogen free is a major > objective. > > Is RIM now into making "my hand-held is greener than your hand-held" > products? I guess my view that "halogen-free is bad science" attitude is > showing through. > > Denny > > > > > > > -----Original Message----- > From: Bev Christian <[log in to unmask]> > To: [log in to unmask] > Sent: Thu, May 13, 2010 2:19 pm > Subject: [TN] Halogen free laminate chemistry > > > Are all halogen free laminates bisphenol A free? > ev > IM > --------------------------------------------------------------------- > his transmission (including any attachments) may contain confidential > nformation, privileged material (including material protected by the > olicitor-client or other applicable privileges), or constitute non-public > nformation. 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