Particulate filled composite film and method of making same

Details Particulate filled composite film and method of making same Particulate filled composite film and method of making same

1993-07-13

1994-12-20

Lusignan, Michael

Coating processes

Heat decomposition of applied coating or base material

427244, 427245, 521 61, 521 62, B05D 302

Patent

active

053744535

ABSTRACT:
A method for making a particulate filled polymeric matrix composite film includes mixing a polymeric matrix material with a dispersion of particulate filler in a carrier liquid to form a casting composition and adjusting the viscosity of the casting composition to retard separation of the particulate filler from the composition. A layer of the viscosity-adjusted casting composition is cast on a substrate and the layer is consolidated to form the particulate filled polymer matrix composite film. Films made by the method include very thin, e.g less than 1.0 mil, fluoropolymeric matrix films highly filled with very small diameter, preferably spherical, particles for use as, e.g. dielectric substrate materials in laminar electrical circuits.

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