Return-Path: Sender: (Marvin Kaye) To: lml Date: Tue, 27 Aug 2002 09:44:44 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m07.mx.aol.com ([64.12.136.162] verified) by logan.com (CommuniGate Pro SMTP 4.0b7) with ESMTP id 1712639 for lml@lancaironline.net; Tue, 27 Aug 2002 09:36:47 -0400 Received: from Newlan2dl@aol.com by imo-m07.mx.aol.com (mail_out_v33.5.) id q.e5.1cf92971 (16484) for ; Tue, 27 Aug 2002 09:36:44 -0400 (EDT) From: Newlan2dl@aol.com X-Original-Message-ID: X-Original-Date: Tue, 27 Aug 2002 09:36:43 EDT Subject: Re: [LML] colors X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_e5.1cf92971.2a9cda6b_boundary" X-Mailer: AOL 7.0 for Windows US sub 10512 --part1_e5.1cf92971.2a9cda6b_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Scott The Jeffco 1307 is suppose to have a HDT (heat distortion temperature) of 190 degrees F. (note the glass transition temp will always be a bit higher). However there are a lot of much higher performance epoxies that have HDT's much higher. One formulator I use also does work for Boaing and is currently working on resins for RTM (resin transfer molding) on the Sonic Cruiser. He now has some epoxies that are good to 210 degrees C. I also suspect you are right about the prepregs being good to 240 F. As a generalization, the cure temp in the oven is indicative of the final HDT but not absolutely so. The stuff Lancair uses is cured at 240 F so it is likely that the HDT is around there. Dan Newland --part1_e5.1cf92971.2a9cda6b_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: 7bit Scott

The Jeffco 1307 is suppose to have a HDT (heat distortion temperature) of 190 degrees F.  (note the glass transition temp will always be a bit higher).  However there are a lot of much higher performance epoxies that have HDT's much higher.  One formulator I use also does work for Boaing and is currently working on resins for RTM (resin transfer molding) on the Sonic Cruiser.  He now has some epoxies that are good to 210 degrees C.  I also suspect you are right about the prepregs being good to 240 F. As a generalization, the cure temp in the oven is indicative of the final HDT but not absolutely so.  The stuff Lancair uses is cured at 240 F so it is likely that the HDT is around there. 

Dan Newland --part1_e5.1cf92971.2a9cda6b_boundary--