Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Noninterengaged fiber-containing paper-free web or sheet...
Reexamination Certificate
2007-04-10
2007-04-10
Sellers, Robert (Department: 1712)
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Noninterengaged fiber-containing paper-free web or sheet...
C252S609000, C428S413000, C428S418000, C525S480000, C525S485000, C525S523000, C528S398000, C549S219000, C568S017000
Reexamination Certificate
active
10866881
ABSTRACT:
There is disclosed a novel mixture of polyhydroxy phenolic curing agents, such as novolac resins blended with a mixture of mono, bis and tris hydroxyaryl phosphine oxides for co-curing epoxy resins and imparting flame resistance thereto. A preferred composition includes a mixture of monohydroxyaryl, bishydroxyaryl and trishydroxyaryl phosphine oxide and a benzoguanamine/phenol/formaldehyde terpolymer which is used along with an epoxy resin to produce flame-resistant printed wiring boards without the use of halogens.
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Edwards E. Bradley
Hanson Mark V.
Timberlake Larry D.
Great Lakes Corporation
Reitenbach Daniel
Sellers Robert
LandOfFree
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