Think about the fact that after the match has burned completely, it still contains phosphorous. Think of the fire retardant as the match, after it has burned... Rudy Sedlak RD Chemical Company "Dehoyos, Ramon" <[log in to unmask]> wrote: ***The so-called halogen free PCB materials (or at least the ones I've looked into for interest) use phosphorus as the retardant.*** Boards have the material that is used in matches to keep them from burning? Interesting, It must be a special from of phosphorous. -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Fox, Ian Sent: Thursday, June 09, 2005 9:23 AM To: [log in to unmask] Subject: Re: [TN] Fire Retardant Ken, Bev is correct, TBBPA which is the usual brominated retardant in FR4 (anybody heard of anything else being used?) is not currently targeted by the RoHS legislation. There were rumblings coming from Scandinavia 12 months or so ago about including TBBPA in the list of materials not to be used for products carrying the Nordic environmental swan mark, but as far as I'm aware it never went any further. The so-called halogen free PCB materials (or at least the ones I've looked into for interest) use phosphorus as the retardant. Regards Ian Fox Goodrich ECS -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian Sent: 09 June 2005 14:06 To: [log in to unmask] Subject: Re: [TN] Fire Retardant Ken, Difunctional epoxies begin with brominated bisphenol-A epoxy resin as the basic building block of FR-4. Most normal boards are NOT using any PBDE's. Tetrabromobisphenol-A (TBBPA, I may have one too many B's in the abbreviation, I'm not a board chemist.) is not an additive, but makes up a large part of the actual board chemistry. There is a report out there that shows that this material is not in the same league as the PBDE's for bioaccumulation and is NOT included in the ban. How that helps. Regards, Bev RIM -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Bloomquist, Ken Sent: June 9, 2005 8:52 AM To: [log in to unmask] Subject: [TN] Fire Retardant What is the PWB industry using for a fire retardant to replace PBDE's. Thanks, KennyB --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------- Yahoo! Mail --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- Stay connected, organized, and protected. Take the tour