TITLE: THERMOFORMABLE CONDUCTIVE LAMINATE AND PROCESS.
European Patent Application EP0642405 A1

ABSTRACT:
Abstract not available for EP0642405
Abstract of corresponding document: WO9324292
A process for making a thermoformable conductive plastic laminate for
use in making plastic parts adapted for electrostatic spray painting of
a uniform high quality paint finish includes forming a matte release
coated casting sheet (20), casting an electrically conductive polymer
(24) in thin film form on the casting sheet, drying to form a
conductive primer coat (24), and transfer-laminating the conductive
coating to a thin, thermoformable plastic face sheet (26). The matte
release coat (20) has fine particulate filler that transfer a
micro-roughened matte surface to the conductive primer coat (24). The
conductive primer (24) includes a polyester resin containing a fine
particulate conductive material such as carbon black and, preferably,
an anti-blocking agent such as fumed silica. The primer coated face
sheet (26) can be thermoformed and bonded to an underlying plastic
substrate panel (28). The conductive primer (24) has sufficient
elongation and maintains uniform electrical surface conductivity and
film thickness throughout the transfer-laminating, thermoforming and
substrate panel-cladding process. The uniform surface resistivity of
the conductive primer film (24) is sufficient to permit electrostatic
spray painting of the finished contoured panel and in one embodiment of
the finished contoured panel and in one embodiment produces a Class "A"
quality exterior automatic paint finish on the resulting panel.

INVENTORS:
Enlow, Howard H. (US)
Huffer, Scott W. (US)
Young, Fredrick (US)
Buehne, William J. (US)

APPLICATION NUMBER: EP19930914120
PUBLICATION DATE: 03/15/1995
FILING DATE: 05/24/1993

ASSIGNEE: AVERY DENNISON CORP (US)
INTERNATIONAL CLASSES: B05D1/38; B05D1/04; B05D5/12; B05D7/04; B29B15/00; B29D99/00;
B32B15/08; B32B27/08; B32B37/20; C08J7/04; B32B38/12; (IPC1-7):
B29B15/00; B32B31/00
EUROPEAN CLASSES: B32B37/20A; B05D1/04C; B32B27/08

DOMESTIC PATENT REFERENCES:
EP0522194 Non-carbon black containing conductive coating composition.

FOREIGN REFERENCES:
4740426 Conductive primer composition

OTHER REFERENCES:
See also references of WO 9324292A1