Thermoplastic-toughened cyanate ester resin composites with low heat release properties
AssigneeHexcel Corporation
InventorsYen-Seine Wang, Yi-Jui Wu
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Abstract
Composite materials that contain thermoplastic-toughened cyanate ester resins as the resin matrix. The composite materials exhibit low levels of heat release when burned. The matrix resins are composed of from 50 to 80 weight percent of a cyanate ester resin component. The matrix resin composition also includes from 10 to 40 weight percent of a thermoplastic blend that is composed of polyetherimide and polyamideimide. The epoxy resin composition further includes from 1 to 10 weight percent of a curative agent. The composite materials may be used for primary structures in aircraft and other load-bearing structures.
Claims9
An uncured composite part comprising:
- a resin matrix comprising:
- 50 to 80 weight percent of a cyanate ester resin component based on the total weight of said resin matrix, said cyanate ester resin component comprising one or more cyanate ester resins that do not contain phosphorous;
- 10 to 40 weight percent of a thermoplastic blend based on the total weight of said resin matrix, said thermoplastic blend comprising polyetherimide and polyamideimide wherein the weight ratio of polyetherimide to polyamideimide is from 5:1 to 1:1;
- 1 to 15 weight percent of a fire retardant agent based on the total weight of said resin matrix, said fire retardant agent comprising a phosphorous-containing cyanate ester resin;
- 1 to 10 weight percent of a curative agent component based on the total weight of said resin matrix, said curative agent component comprising a curative agent for said cyanate ester component;
- and
- a fibrous reinforcement.
Dependencies are inferred from the claim text.