Crosslinking agents for PVB / PVF
Just came across your forum while trying to find some info on the web. I am trying to coat an electroplated copper layer with a polymer to insulate it from another layer I plan to put on top. I know that there are loads of insulator systems available but the problem is that I have to use screen-printing to put on the layer. Those I have found before dry too soon on the screen or the layers short after electroplating the second layer. At the moment I use PVB or PVF in a solvent but the layers are not stable. Now, if I could get a crosslinking agent, either UV of temperature activated, I figure that my problem could be solved.
So, If anyone knows of an easily available crosslinker which does the trick (or has a good chance) I would love to hear from you. Of course other suggestions are also welcome.
Many thanks for any help.David Egan
University of Limerick - Limerick, Ireland
Dear Mr Egan,
In practice PVB is able to react with cross-linking partners such as phenolic, epoxide and melamine resins (application high-quality stoving enamels). For air drying, cross-linkable coating systems adequately catalyzed phenolic, urea and melamine resin, as well as polyisocyanate and dialdehyde combination partners are used.
I do not know if this information will help you to solve your problem, but I hope so.Dr. Uwe Brueckner
Clariant GmbH/ Div. CEP/BU PVA/PVB/ Marketing - Sulzbach, Germany
November 30, 2009
I am trying the same and saw on a patent that PVB can be thermally cross-linked at about 150-200 C for a couple of hours. I have done something like this in the past, so I'm sure it can be done. I'm just trying to reproduce old results.
Let me know what you find out,
- Philipsburg, Pennsylvania
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