Re: more dehp (or rather, bPA)

[cmcr@ism.net (Cold Mountain, Cold Rivers)]

>From: DrBillC@aol.com
>Date: Fri, 19 Jul 1996 23:57:16 -0400
>To: cmcr@ism.net
>Subject: Re: more dehp (or rather, bPA)
>Status:
>
>Tony:
>
>This is a private response to your posting.  You are welcome to forward it to
>the list if you think it is of general interest.
>
>Bisphenol-A is a monomer of polycarbonate.  The issue with most uses will be
>residual BPA in the polymer.  This is what studies on the amount that
>migrates into contents are about.
>
>When polymerized, BPA becomes part of a different molecule and cannot be
>"dissolved out" as such.  If there is residual that is unreacted, it could
>migrate, but is subject to diffusion through the plastic, generally a slow
>process.
>
>Please note:  this is not a statement of "never, never, never".  It's worth
>looking at, and the plastics guys are doing that now; however, the fact that
>BPA is a monomer and reacted into the plastic is actually better than if it
>were an additive  and simply physically mixed.
>
>Hope this helps.
>
>Bill Carroll
>Chlorine Chemistry Council
>

Tony Tweedale				|| "I'm not going to get involved in any  of that
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