Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Noninterengaged fiber-containing paper-free web or sheet...
Reexamination Certificate
2010-05-25
2011-12-20
Edwards, Newton (Department: 1798)
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Noninterengaged fiber-containing paper-free web or sheet...
C428S292100
Reexamination Certificate
active
08080313
ABSTRACT:
Particle toughened, fiber-reinforced composites include a fiber region and an interlayer region between the fibers. The fiber region includes a plurality of fibers at least partially within a first polymer composition including a first base polymer formulation and a first plurality of toughening particles. The interlayer region includes a second polymer composition including a second base polymer formulation and at least one of the first plurality of toughening particles and a second plurality of toughening particles. Examples of first and second pluralities of toughening particles, respectively, may include core shell rubbers and polyimides. Increasing concentration of the first plurality of toughening particles may improve the composite toughness while preserving thermal properties of the composite, such as weight loss after extended duration exposure to elevated temperature. It is further discovered that the relative placement of the toughening particles influences composite mechanical properties, such as compression after impact (CAI) strength.
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ISR/Written Opinion for PCT/US2010/036142 mailed Aug. 9, 2010.
Bonneau Mark Richard
Boyd Jack Douglas
Emmerson Gordon T.
Howard Stephen J.
Jacobs Spencer Donald
Cytec Technology Corp.
Dang Thi D.
Edwards Newton
Neller Robert R.
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