PREPARATION OF MOLDING RESINS FROM INEXPENSIVE BY-PRODUCTS .2. PROPERTIES OF MOLDINGS MADE WITH VARIOUS CATALYZED PHENOLATED AND UNMODIFIEDPITCH LIGNIN SYSTEMS/

A previous study(1) indicated that the properties of 25 and 50% resin mouldings prepared from pitch and lignin via acid or alkaline phenolat ion (mass ratio 60:40) were not inferior to resins from pitch and lign in made according to the conventional route of novolac manufacture (vi a a formaldehyde stage). It was also evident from a supporting study(2 ) that incorporation of relatively small amounts of unmodified lignin into phenol novolac mouldings of 25% resin content reduced the physica l properties of the mouldings significantly. Ln the present study, cer tain catalyst systems were used in the phenolation process of pitch an d lignin and the products were further investigated for their properti es as moulding resins.