Composition of epoxy resin, curing agent, phosphate of resorcinol, Al (OH)
AssigneeFujitsu Limited
InventorsNawalage Florence Cooray, Koji Tsukamoto, Takeshi Ishitsuka
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Abstract
A halogen-tree, flame-retardant insulating epoxy resin composition which comprises (1) an epoxy resin, (2) a curing agent for the epoxy resin, (3) a phosphate of a resorcinol type, (4) aluminum hydroxide, and (5) a cure accelerator for the epoxy resin. The composition displays necessary flame retardant properties and sufficient insulating properties after the formation of an insulating layer in a circuit board, withstands a plating process, and does not cause the bleedout of the insulation layer formed. A circuit board with flame retardant properties comprising insulation layers formed of the epoxy resin composition is also disclosed.
Claims13
A halogen-free, flame-retardant insulating epoxy resin composition which comprises (1) an epoxy resin mixed with an epoxy resin having three or more epoxy groups, (2) a curing agent for the epoxy resin, (3) a phosphate of resorcinol, (4) from 15 to 20 parts by weight per 100 parts by weight of total solids in the composition of aluminum hydroxide, and (5) a cure accelerator for the epoxy resin.
Dependencies are inferred from the claim text.