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September 2007

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Subject:
From:
"Douglas O. Pauls" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Wed, 12 Sep 2007 17:06:31 -0500
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Joe,
Would you happen to have a copy of IPC-HDBK-830 laying around?  That would 
be a good place to start.

Moisture cures are usually the silicones.  Cross linkers are the urethanes 
and epoxies.

Doug Pauls




Joe Macko <[log in to unmask]> 
Sent by: TechNet <[log in to unmask]>
09/12/2007 05:00 PM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
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Subject
[TN] Conformal coating properties question






Fellow Techs,

 

I have been asked to help select an alternate material that cures by
moisture / cross-linking (and not by solvent evaporation such as
HumiSeal type AR 1B31). There are a range of mainly type UR materials to
select that offer moisture cure and have differing Tg, CTE and Young's
Modulus properties. 

 

I am very interested in any information that relates a conformal coating
materials Tg, CTE and Young's Modulus to a coating's capability, board
reliability etc..

 

Thanks again

-Joe

 


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