COMPARISON OF WASTE SILICA FILLERS MODIFIED WITH VARIOUS PROADHESIVE COMPOUNDS

Results are presented on the improvement of the degree of surface hydrophobization of post-fluorine waste silicas. Two types of waste silica were used, representing by-products of aluminium fluoride and hydrofluoric acid production, respectively. The silicas were subjected to surface modification to obtain appropriately active fillers for the production of rubber vulcanizates and urethane elastomers. To this end, proadhesive compounds were used including surfactants, silane and titanate coupling agents, and organic compounds with oxyethylene chains. The effects of the type of proadhesive compound used and its amount on the mechanical properties of Ker 1500 butadiene-styrene rubber vulcanizates and of urethane elastomers were examined.