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<DIV><FONT face="MS Sans Serif" size=2> One of the guys at our field is a auto paint salesman and he says the the bad stuff is the same as any PPG Concept or Dupont but Imron is twice the amount, we used to use Imron alot to fuel proof but it is more hazardous than the modern paints, many still use it though. But remember that all these paint are hazardous to health if not properly used.</FONT></DIV>
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<DIV>Steven Maxwell</DIV>
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<DIV style="FONT: 10pt Arial">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=gfowler@raytheon.com href="mailto:gfowler@raytheon.com">Gray E Fowler</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To: </B><A title=nsrca-discussion@lists.nsrca.org href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A></DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> 7/12/2006 2:13:46 PM </DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] paint</DIV>
<DIV><BR></DIV><FONT size=2><BR><FONT face=sans-serif size=2>Tim</FONT> <BR><BR><FONT face=sans-serif size=2>I am unaware of Imron properties. Clear coat is a protection for some systems that are not fuel proof and for pigmented car systems that absolutely require a reactive clear coat. I do not trust that a paint shop person is aware of the nitromethane chemical resistance of Imron. Pehaps someone on this list does know.</FONT> <BR><BR><FONT face=sans-serif size=2>Single stage paints, such as PPG DBU etc are a non reactive carrier resin pigmented with a color and fillers. They basically "dry" or evaporate a solvent and what is left behind is the non reacted resin and color. Clearcoats are reactive, which is a thermosetting polymer-non reversable. Single stage paints dry and then can be removed with a slovent wipe, or fuel on your plane.</FONT> <BR><BR><FONT face=sans-serif size=2>But! it is important tp point out that single stage paints are not affected by electric battery exhaust, except for the occasional unbalanced cell act.</FONT> <BR><FONT face=sans-serif size=2><BR><BR><BR>Gray Fowler<BR>Senior Principal Chemical Engineer<BR>Radome and Composites Engineering<BR>Raytheon</FONT> <BR><BR><BR>
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<TD width="40%"><FONT face=sans-serif size=1><B>"Tim" <twortkoetter@yahoo.com></B> </FONT><BR><FONT face=sans-serif size=1>Sent by: nsrca-discussion-bounces@lists.nsrca.org</FONT>
<P><FONT face=sans-serif size=1>07/12/2006 10:39 AM</FONT>
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<TD></TR></TBODY></TABLE><BR></TR></TBODY></TABLE><BR><BR><BR><FONT face=Arial color=#000080 size=2>I am getting ready to spray imron. I have never painted anything. I told the paint shop what I was using it for and they said I didn’t need a clear and I didn’t get any reducer. What type of reducer and how much should I use for this type of paint. Also why do you use clear over a single stage paint. </FONT>
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<P><FONT face=Arial color=#000080 size=2>Tim</FONT>
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<P><FONT face=Tahoma size=2>-----Original Message-----<B><BR>From:</B> nsrca-discussion-bounces@lists.nsrca.org [mailto:nsrca-discussion-bounces@lists.nsrca.org] <B>On Behalf Of </B>Gray E Fowler<B><BR>Sent:</B> Wednesday, July 12, 2006 8:17 AM<B><BR>To:</B> NSRCA Mailing List<B><BR>Subject:</B> Re: [NSRCA-discussion] paint</FONT>
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<P><FONT face=sans-serif size=2><BR>Robert</FONT><FONT face="Times New Roman" size=3> <BR></FONT><FONT face=sans-serif size=2><BR>Humidity is not a problem, dew point is. Since it is warm now in most places this should not be a problem. The amount of reducer called out by the paint manufacturer has two purposes, </FONT><FONT face="Times New Roman" size=3><BR></FONT><FONT face=sans-serif size=2><BR>1. Reduce the viscosity so a standard paint gun can atomize</FONT><FONT face="Times New Roman" size=3> </FONT><FONT face=sans-serif size=2><BR>2. Only reduce the viscosity barely enough as to meet EPA volatile organic emmision requirements </FONT><FONT face="Times New Roman" size=3><BR></FONT><FONT face=sans-serif size=2><BR>The PPG "reducer" amounts allow the car painting guy to seriously "lay it on" with out fear of runs or overspray. Unfortunately laying it on an airplane increases weight. A thicker clear coat will not really protect your plane better than a thinner coat, so it is just weight. Adding more reducer (its really a blend of different solvents) will allow for thinner coats, less overspray, but can increase runs. </FONT><FONT face="Times New Roman" size=3><BR></FONT><FONT face=sans-serif size=2><BR>The reducer like I mentioned is a blend of solvents, and all of this 100% evaporates and has nothing to do with the urethane chemical reaction that cures the clearcoat. You can add as much reducer as you want without reprisal...except from the EPA, which I doubt will go after an individual pattern guy...but I could be wrong. So once you are comfortable with increasing your local pollution level...add that 200% reducer!!!</FONT><FONT face="Times New Roman" size=3> </FONT><FONT face=sans-serif size=2><BR><BR><BR><BR>Gray Fowler<BR>Senior Principal Chemical Engineer<BR>Radome and Composites Engineering<BR>Raytheon</FONT><FONT face="Times New Roman" size=3> <BR></FONT>
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<TD width="48%"><FONT face=sans-serif size=1><B>"Robert Mairs" <robertm@sssnet.com></B> <BR>Sent by: nsrca-discussion-bounces@lists.nsrca.org</FONT><FONT face="Times New Roman" size=3> </FONT>
<P><FONT face=sans-serif size=1>07/12/2006 05:42 AM</FONT><FONT face="Times New Roman" size=3> </FONT>
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<P><FONT face="Times New Roman" size=3><BR><BR></FONT><FONT face="Courier New" size=2><BR>Couple of painting questions.<BR><BR>Weathers turned to crap around here again. How much humidity is to humid to <BR>paint?<BR><BR>I've been reading where the jet guys are reducing they're clear coat to a <BR>200% ratio. They think it's great. Anybody tried this? <BR><BR><BR>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</FONT><FONT size=2><TT>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</TT></FONT>
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