RE: drying coil forms

• To: tesla-at-pupman-dot-com
• Subject: RE: drying coil forms
• From: "ROBERT CRESSLER" <59CREROB-at-MENASHA-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Wed, 08 Dec 1999 18:42:41 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

    Ted,
           in regard to you question/statement:"BUT, this is the first time
I've
heard that certain sealing agents can crack acrylic. Anything in particular
I should stay away from? "

I quote form "Plexiglas Handbook" by Rohm & Haas  (from 1966 oldie but goodie!)
Plexiglas(acrylic: cell cast) chemical properties
"In general,Plexiglas is unaffected by most inorganic solutions,mineral and
animal oils,and low concentrations of alcohol.Oxidizing acids affect the
material only in high concentrations;and it is unaffected by paraffinic and
olefinic hydrocarbons,amines,alkymonoalides,and esters containing more than
ten carbon atoms.
Lower esters,aromatic hydrocarbons,phenols,aryl halides,aliphatic acids and
alkyl polyhalides usually have a solvent action"

(Whew! tough on spell check)    sooo,yes I suspect the solvent in the
polyurethane will have a solvent action and (probably) cause  some type of
crazing. more so on extruded 
acrylic tube 

Robert 

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