Composite materials with improved burn properties

Details Composite materials with improved burn properties Composite materials with improved burn properties

2009-09-29

2011-10-11

Woodward, Ana (Department: 1765)

Stock material or miscellaneous articles

Composite

Of epoxy ether

C428S323000, C428S327000, C428S473500, C524S538000, C525S423000, C525S436000

Reexamination Certificate

active

08034453

ABSTRACT:
Epoxy resins and composite materials that generate reduced levels of sulfur dioxide and which unexpectedly have reduced self-extinguishing times. The epoxy resins are composed of from 50 to 70 weight percent of an epoxy resin component. The epoxy resin composition also includes from 20 to 35 weight percent of a thermoplastic blend that is composed of polyetherimide and polyamideimide. The epoxy resin composition further includes from 5 to 25 weight percent of a curative agent. The composite materials may be used for primary structures in aircraft and other load-bearing structures.

REFERENCES:
patent: 5268223 (1993-12-01), Qureshi et al.
patent: 5985431 (1999-11-01), Oosedo et al.
patent: 2005/0008868 (2005-01-01), Nakamura et al.
patent: 2055642 (1992-05-01), None
patent: 2055642 (1993-12-01), None
patent: 2008-007682 (2008-01-01), None
patent: 2009/032809 (2009-03-01), None
Torlon Product Data Sheet, pp. 1-2, Jan. 2008.

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