VARNISHES FOR GLASSCLOTH LAMINATES, METHOD OF THEIR PRODUCTION AND LAMINATES MADE THEREFROM

The present invention relates to varnishes for use in the preparation of glasscloth laminates, methods of their production and laminates made therefrom. The varnish is made by dissolving 100 parts of a TFP resin having a number average molecular weight of about 1000 and an oxygen content of about 8%...

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Bibliographische Detailangaben
Hauptverfasser:	BRAIN, SALLY ANN, ROBINSON, JOSEPH GORDON
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERAL PROCESSES OF COMPOUNDING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PRINTED CIRCUITS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention relates to varnishes for use in the preparation of glasscloth laminates, methods of their production and laminates made therefrom. The varnish is made by dissolving 100 parts of a TFP resin having a number average molecular weight of about 1000 and an oxygen content of about 8% in 60 to 65 parts of butan-2-one or isopropanol. 8 to 12 parts of hexamine are dissolved in a minimum quantity of a solvent comprising water and IMS in a ratio of about 3:5. The two solutions are thoroughly mixed and filtered to produce the varnish. The varnish is used to prepare glasscloth laminates for use as printed circuit boards.