Hard foam cores for laminates

Details Hard foam cores for laminates Hard foam cores for laminates

1989-07-31

1991-02-26

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

264 453, 4283179, 428323, 428328, 4284735, 521149, B32B 326

Patent

active

049961098

ABSTRACT:
Rigid foamed polymethacrylimide synthetic resin containing from 0.1 to 10 percent by weight of electrically conductive particles such as conductive carbon black exhibit improved properties when used in rapidly flowing streams of gases, are particularly suitable for use as a core material in laminates for aircraft construction, and are prepared by heating a copolymer of methacrylic acid and methyacrylonitrile containing a blowing agent and conductive particles.

REFERENCES:
patent: 4139685 (1979-02-01), Schroeder
patent: 4187353 (1980-02-01), Schroeder
patent: 4205111 (1980-05-01), Pip et al.
patent: 4316934 (1982-02-01), Maier et al.
patent: 4493788 (1985-01-01), Fujio et al.
patent: 4865784 (1989-09-01), Hill

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