Epoxy resin compositions containing red phosphorus
AssigneeShell Oil Company
InventorsMaria Julia Jozef Bruynseels, Malte Homann
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Abstract
Curable epoxy resin composition comprising a bisphenol based epoxy resin having between 1.1 and 2.5 epoxy groups on average per molecule, a polyhydric phenol curing agent having more than two phenolic hydroxyl groups on average per molecule and red phosphorus. Also are described a process for the production of such curable epoxy resin compositions, the use of the compositions, especially in the impregnation of fibrous fibers, and products comprising or coated by the partly cured or cured epoxy resin compositions, especially impregnated fibrous fibers and laminates made therefrom.
Claims22
A curable epoxy resin composition comprising a bisphenol epoxy resin having between 1.1 and 2.5 epoxy groups on average per molecule, a polyhydric novolac curing agent having more than two phenolic hydroxyl groups on average per molecule and red phosphorus in an amount of between 1.0 and 5.0 percent by weight based on the total reactive ingredients in the resin composition, said resin composition having a UL 94 rating of V-0 when cured.
A process for the preparation of a curable epoxy resin composition comprising mixing a bisphenol epoxy resin having between 1.1 and 2.5 epoxy groups on average per molecule, a polyhydric novolac curing agent having more than two phenolic hydroxyl groups on average per molecule and red phosphorus in an amount of between 1.0 and 5.0 percent by weight based on the total reactive ingredients in the resin composition, said epoxy resin composition having a UL 94 rating of V-0 when cured.
Dependencies are inferred from the claim text.