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.
Claims20
An uncured composite part comprising:
- a resin matrix comprising:
- 50 to 80 weight percent of a cyanate ester resin component comprising one or more cyanate ester resins;
- 10 to 40 weight percent of a 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, said fire retardant agent comprising a phosphorous-containing cyanate ester resin;
- and
- a fibrous reinforcement.
A method for making a prepreg comprising the steps of:
- A) providing a matrix resin comprising:
- 50 to 80 weight percent of a cyanate ester resin component comprising one or more cyanate ester resins;
- 10 to 40 weight percent of a 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, said fire retardant agent comprising a phosphorous-containing cyanate ester resin;
- and
- B) combining said matrix resin with a fibrous reinforcement to provide said prepreg.
Dependencies are inferred from the claim text.