Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Fri, 27 Feb 2004 15:39:28 -0500 Message-ID: X-Original-Return-Path: Received: from imo-r07.mx.aol.com ([152.163.225.103] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3048280 for lml@lancaironline.net; Fri, 27 Feb 2004 13:36:29 -0500 Received: from Newlan2dl@aol.com by imo-r07.mx.aol.com (mail_out_v36_r4.14.) id q.159.2ed5b1c5 (18403) for ; Fri, 27 Feb 2004 13:36:20 -0500 (EST) From: Newlan2dl@aol.com X-Original-Message-ID: <159.2ed5b1c5.2d70e823@aol.com> X-Original-Date: Fri, 27 Feb 2004 13:36:19 EST Subject: Re: [LML] Hysol 9339 Question X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1077906979" X-Mailer: 9.0 for Windows sub 5003 -------------------------------1077906979 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hi Jeff There are two ways to check the life of epoxies. The first is to very precisely check the gel time after mixing to make sure it is within the specs. The second way is to do a Shore hardness test. Ther are labs that can do that or maybe you can talk to the folks at Hysol or maybe Jeffco into doing it for you. Generally speaking, the real shelf life of epoxies are very VERY long. Some of them also go through a phase change if you get them chilled sufficiently and need some warming. So if you have some hardened resin that you didn't cross link, place the container under a black tarp in the sun on a hot day or place it in very hot water for awhile to resurect it. That phase change does not really affect the properties. Dan Newland -------------------------------1077906979 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Hi Jeff

There are two ways to check the life of epoxies. The first is to=20= very precisely check the gel time after mixing to make sure it is within the= specs. The second way is to do a Shore hardness test. Ther are=20= labs that can do that or maybe you can talk to the folks at Hysol or maybe J= effco into doing it for you. Generally speaking, the real shelf life o= f epoxies are very VERY long. Some of them also go through a phase cha= nge if you get them chilled sufficiently and need some warming. So if=20= you have some hardened resin that you didn't cross link, place the container= under a black tarp in the sun on a hot day or place it in very hot water fo= r awhile to resurect it. That phase change does not really affect the=20= properties.

Dan Newland

-------------------------------1077906979--