Flame retardant compositions
AssigneePolyclad Laminates, Inc.
InventorsGuoren He, William Varnell, Thomas Williams
Life of this patent
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Abstract
Flame retardant compositions that are halogen-free or substantially halogen-free are disclosed. In certain examples, the compositions comprise a polyphenylene ether, a halogen-free or substantially halogen-free polyepoxide, and one or more phosphorated compounds. Prepregs, laminates, molded articles and printed circuit boards using the compositions are also disclosed.
Claims71
A composition comprising:
- about 20% to about 55% by weight of a polyphenylene ether;
- about 10% to about 40% by weight of a substantially halogen-free polyepoxide;
- and
- about 10% to about 30% by weight of a phosphorated compound.
A halogen-free or substantially halogen-free composition comprising a flame retardant amount of chemically combined phosphorous and having a glass transition temperature of at least about 140° C.
A halogen-free or substantially halogen-free composition comprising a flame retardant amount of chemically combined phosphorous providing a peel strength of at least about 4 lb/inch width as tested by IPC-TM-650 2.4.8C.
A halogen-free or substantially halogen-free composition comprising a flame retardant amount of chemically combined phosphorous and having a dielectric constant at 1 MHz (50% resin content) of about 5.0 or less as tested by IPC-TM-650 2.5.5.3C.
A halogen-free or substantially halogen-free composition comprising a flame retardant amount of chemically combined phosphorous and having a dielectric dissipation factor at 1 MHz (50% resin content) of about 0.02 or less as tested by IPC-TM-650 2.5.5.3C.
A halogen-free or substantially halogen-free composition comprising a flame retardant amount of chemically combined phosphorous and having a flame retardancy of V-0 as defined by the UL-94 burn test.
Dependencies are inferred from the claim text.