Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Sun, 06 Feb 2005 10:07:07 -0500 Message-ID: X-Original-Return-Path: Received: from mail.indian-creek.net ([209.176.40.9] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 660104 for lml@lancaironline.net; Sat, 05 Feb 2005 09:42:57 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.176.40.9; envelope-from=toucan@78055.com Received: from toucan (*authenticated* [209.176.40.37] toucan@78055.com) by mail.indian-creek.net with SMTP (IOA-IPAD 4.10b/96) id 5HZ2J00 for ; Sat, 05 Feb 2005 08:42:19 -0600 X-Original-Message-ID: <004901c50b91$5ad06f20$2528b0d1@toucan> From: "Jim Cameron" X-Original-To: "Lancair Mailing List" Subject: Isocyantes X-Original-Date: Sat, 5 Feb 2005 08:45:35 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0046_01C50B5F.0F75BC60" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0046_01C50B5F.0F75BC60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Be aware that respirators with the normal activated carbon canisters = are not effective for removal of the isocyanates that are released = during the curing of acrylic polyurethane paints such as Imron. Not = only is the stuff not absorbed very effectively, the isocyanates also = enter the body through the skin and particularly the mucous membranes of = the eyes. Both OSHA and the manufacturers recommend forced air respirator = systems. Hobby Air sell a nice system for a reasonable fee. I've used = it for two airplanes now, and the only beef I have with it is that it is = sometimes difficult to see inside the Tyvek hood. The transparent = faceplates get fogged, but are replaceable. Buy plenty of them if you = order a system. The exposure data on isocyanates is actually pretty hard to = interpret. There have been a few fatalities from cardiac effects, but = they are rare, and the exposure standards are all geared to people with = occupational exposure, i.e., people using the stuff every day. = Calculated risk with a canister respirator? Make your own decision. Jim Cameron Medina, Texas [Soon moving to Boerne Stage Airfield, 5C1, to open a builder assist = center this summer.] ------=_NextPart_000_0046_01C50B5F.0F75BC60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
    Be aware that = respirators with=20 the normal activated carbon canisters are not effective = for=20 removal of the isocyanates that are released during the curing of = acrylic=20 polyurethane paints such as Imron.  Not only is the stuff not = absorbed very=20 effectively, the isocyanates also enter the body through the skin and=20 particularly the mucous membranes of the eyes.
    Both OSHA and the = manufacturers=20 recommend forced air respirator systems.  Hobby Air sell a nice = system for=20 a reasonable fee.  I've used it for two airplanes now, and the only = beef I=20 have with it is that it is sometimes difficult to see inside the Tyvek=20 hood.  The transparent faceplates get fogged, but are = replaceable. =20 Buy plenty of them if you order a system.
    The exposure data on = isocyanates=20 is actually pretty hard to interpret.  There have been a few = fatalities=20 from cardiac effects, but they are rare, and the exposure standards are = all=20 geared to people with occupational exposure, i.e., people using the = stuff every=20 day.  Calculated risk with a canister respirator?  Make your = own=20 decision.
 
Jim Cameron
Medina, Texas
[Soon moving to Boerne Stage Airfield, = 5C1, to open=20 a builder assist center this summer.]
 
------=_NextPart_000_0046_01C50B5F.0F75BC60--