Halogen-free mixture, a self-extinguishing prepreg containing this mixture and the use of such a prepreg
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United States of America Patent
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Jul 15, 1997
Grant Date -
N/A
app pub date -
Jun 19, 1995
filing date -
Oct 21, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A halogen-free resin mixture comprising an epoxy resin, a hardener, a flame retardant as well as additives, a self-extinguishing prepreg composed of this resin mixture as well as its advantageous application, particularly as an insulation material. The halogen-free resin mixture being composed of: a) 20-60 weight % epoxy resin; b) 20-60 weight % phenolic novolak hardener; c) 5-65 weight % zinc borate as flame retardant; and d) 0-30 weight % additives.
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