FILLERS FOR IMPROVED EPOXY LAMINATES

FILLERS FOR IMPROVED EPOXY LAMINATES

Epoxy laminates incorporate up to 20 wt.% talc particles, particularly pure Montana platy talc particles having a maximum particle size of about 40 mu m providing improved drilling performance, reduced dust formation, and improved Z-direction CTE, particularly when the epoxy resin has a Tg of about...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: CONN, PEGGY, MAE, KAMLA, JEFFREY, ROBERT, TUNGARE, AROON, VISHWANATH, RICHGELS, SCOTT, HAROLD
Format: Patent
Sprache:eng ; fre
Schlagworte:
CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS
CHEMISTRY
COMPOSITIONS BASED THEREON
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PRINTED CIRCUITS
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:Epoxy laminates incorporate up to 20 wt.% talc particles, particularly pure Montana platy talc particles having a maximum particle size of about 40 mu m providing improved drilling performance, reduced dust formation, and improved Z-direction CTE, particularly when the epoxy resin has a Tg of about 150 DEG C or higher. The talc is selected from those which do not significantly reduce the electrical strength of the laminate relative to those which contain no talc particles. Characteristically, the talcs will have less than 5 wt.% impurities and less than 0.01 wt.% (100 wt.ppm) water extractable anions.