Resinous compositions and composite laminated members produced therewith

Claim 1

AN ELECTRICAL GRADE COMPOSITE LAMINATED MEMBER HAVING COLD PUNCHING CHARACTERISTICS COMPRISING A CORE STOCK OF A PLURALITY OF SHEETS OF KRAFT PAPER FACED WITH A SHEET OF HIGHLY PURIFIED COTTON CELLOLUSE, THE SHEETS OF KRAFT PAPER AND HIGHLY PURIFIED COTTON CELLULOSE BEING IMPREGNATED FIRST WITH A THERMOSETTABLE WATER SOLUBLE PHENOLIC RESIN AND SECONDLY WITH A THERMOSETTABLE RESINOUS VARNISH COMPOSITION COMPRISING: (A) ONE PART BY WEIGHT OF THE RESINOUS PRODUCT DERIVED BY CONDENSING (A) ONE MOL OF A MIXTURE OF PHENOLS CONSISTING ESSENTIALLY OF (I) FROM 0.83 TO 0.5 MOL PERCENT OF A PHENOL SELECTED FROM AT LEAST ONE OF THE GROUP CONSISTING OF PHENOL, CRESOL AND XYLENOLS AND (II) FROM 0.17 TO 0.5 MOL PERCENT OF A BLEND OF SUBSTITUTED PHENOLS COMPRISING FROM ABOUT 85% TO 90% BY WEIGHT OF ETHYL PHENOLS AND ISOPROPYL PHENOLS, AAND THE BALANCE BEING OTHER SUBSTITUTED PHENOLS, ABOUT 90% OF THE ETHYL PHENOLS AND THE ISOPROPYL PHENOLS BEING THE PARA ISOMER AND FOR EACH PART BY WEIGHT OF THE ISOPROPYL PHENOL PRESENT THERE IS PRESENT FROM ABOUT 1.3 TO 1.6 PARTS BY WEIGHT OF THE ETHYL PHENOLS, WITH (B) FROM ABOUT 0.7 MOL TO 1.5 MOLS OF AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND POLYMERS OF FORMALDEHYDE, THE REACTION BEING EFFECTED UNDER REFLUX CONDITIONS IN THE PRESENCE OF AN ALKALINE CATALYST AND THEN DEHYDRATED UNTIL SUBSTANTIALLY ALL THE WATER IS REMOVED, (B) FROM 0.25 TO 0.50 PART BY WEIGHT OF A DRYING OIL, AND, (C) FROM 0.05 TO 0.17 PART BY WEIGHT OF TALL OIL.