Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Wed, 15 Dec 2004 01:22:44 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d04.mx.aol.com ([205.188.157.36] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 568028 for lml@lancaironline.net; Wed, 15 Dec 2004 00:57:45 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.157.36; envelope-from=Newlan2dl@aol.com Received: from Newlan2dl@aol.com by imo-d04.mx.aol.com (mail_out_v37_r3.8.) id q.1ac.2d992418 (3964) for ; Wed, 15 Dec 2004 00:57:10 -0500 (EST) From: Newlan2dl@aol.com X-Original-Message-ID: <1ac.2d992418.2ef12c36@aol.com> X-Original-Date: Wed, 15 Dec 2004 00:57:10 EST Subject: larry zeliadt question, Epoxy on wingtips X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1103090230" X-Mailer: 9.0 for Windows sub 5035 -------------------------------1103090230 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 12/13/2004 12:49:20 PM Pacific Standard Time, lorn@dynacomm.ws writes: Hi Larry I just happened to see this so I don't know why I didn't get your posting (although I travel a lot and sometimes can't read all of the postings). Anyway, you asked about the DR-5 resin used as a bonding dhesive. Yes, it's very good stuff. The peel strength is very high compared to single phase resins like West System and Jeffco. A higher strength epoxy designed for bonding is the DRXTHX (I think that's right). I use it for all critical applications of adhesive and the "THX" designation means it has been thickened to make it thixotropic. Itis still a bit prone to sag but hangs well for medium thick bond lines. Extra thixotrope like "cab-O-Sil will make it truly thixotropic and hang on anything as a paste. It has a higher bond strength than the DR-5 and DR-7 resins. The Hysol though is the highest. As to whether it will work, I would say it should. It will distribute the loads better than the screws called out and basically anything that the Jeffco can do, the DR-5 and -7 can do better. I don't know about the "poly Epoxy" from Aircraft Spruce but if I remember correctly, isn't that a toughened (2 phase) epoxy? Note that all 2 phase epoxies are toughened but not all toughened epoxies are two phase. Dan -------------------------------1103090230 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 12/13/2004 12:49:20 PM Pacific Standard Time, lorn@d= ynacomm.ws writes:

Hi Larry

I just happened to see this so I don't know why I didn't get your posti= ng (although I travel a lot and sometimes can't read all of the postings).&n= bsp; Anyway, you asked about the DR-5 resin used as a bonding dhesive. = Yes, it's very good stuff. The peel strength is very high compared to= single phase resins like West System and Jeffco. A higher strength ep= oxy designed for bonding is the DRXTHX (I think that's right). I use i= t for all critical applications of adhesive and the "THX" designation means=20= it has been thickened to make it thixotropic. Itis still a bit prone t= o sag but hangs well for medium thick bond lines. Extra thixotrope lik= e "cab-O-Sil will make it truly thixotropic and hang on anything as a paste.= It has a higher bond strength than the DR-5 and DR-7 resins. Th= e Hysol though is the highest.

As to whether it will work, I would say it should. It will distri= bute the loads better than the screws called out and basically anything that= the Jeffco can do, the DR-5 and -7 can do better. I don't know about=20= the "poly Epoxy" from Aircraft Spruce but if I remember correctly, isn't tha= t a toughened (2 phase) epoxy? Note that all 2 phase epoxies are tough= ened but not all toughened epoxies are two phase.

Dan

-------------------------------1103090230--