Flame-retardant epoxy resin compositions

Details Flame-retardant epoxy resin compositions Flame-retardant epoxy resin compositions

1977-09-19

1979-03-20

Lieberman, Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260829, 260834, 528 89, C08L 6300

Patent

active

041453697

ABSTRACT:
Flame-retardant epoxy resin compositions comprising a polyepoxide, an acid anhydride curing agent, an imidazole curing accelerator, aluminum trihydrate powder and red phosphorus powder or red phosphorus powder coated by a thermo-setting resin have a lower viscosity and therefore show a longer pot life and better workability on casting as compared with prior art resin compositions. Also, a fly-back transformer coil produced by casting of said flame-retardant epoxy resin compositions is flame-retardant. Even if it burns slightly, no toxic gas is produced. Therefore, the coil has advantages in that a magnet wire is not corroded and voids are difficult to be formed and thereby partial discharge is difficult to occur, resulting in a long life and a stable output voltage.

REFERENCES:
patent: 3373135 (1968-03-01), Jenkner
patent: 3477982 (1969-11-01), Dijkstra
patent: 3563850 (1971-02-01), Stackhouse
patent: 3660321 (1972-05-01), Praetzel
patent: 3780132 (1973-12-01), Lohr
patent: 3823200 (1974-07-01), Pradenne
patent: 3867344 (1975-02-01), Frank
patent: 3906055 (1975-09-01), Fishman
patent: 3922459 (1975-11-01), Franz
patent: 3936342 (1976-02-01), Matsubara

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