chemicals, namely polybutenes, for use in the manufacture of - engine lubricating oil additives, petrol additives, engine lubricants, two stroke lubricants, metal working lubricants, sealants and putty, masonry coatings, adhesives, rubbers, resins, leather treatment, textiles and paper, printing inks, waxes, paints, bitumens, plastics, electrical apparatus, machinery and vehicular hydraulic/transmission fluids, agricultural spray formulations, tackified polyethelene and flexible and/or waterp...