By Nick Gilbert
ICL Performance Products has developed a new, improved process for formulating asphalt binders comprising polyphosphoric acid and SBS polymers. This latest method is modified by adding crosslinking agents before adding the acid and polymer.
ICL Performance Products Develops Improved Method for Preparing Modified Asphalt Binders. (PRNewsFoto/ICL Performance Products)
The new method delivers a number of benefits such as improved elastic properties, higher stiffness and more efficient utilization of modifiers. The Multiple Stress Creep Recovery (MSCR) test method can be used to demonstrate these enhancements. In MSCR, the two major parameters are non-recoverable compliance (Jnr) and percent recovery. This process also delivers superior homogeneity to the products. The latest technique can be utilized to make concentrates as well as finished products. Through the method’s efficient use of modifiers, customers can realize potential cost reductions, enhanced product, or a combination of both.
ICL offers this process under a license agreement which is described in the U.S. Patent No. 8,198,350. For customers purchasing Polyphosphoric Acid 105C or 115C, the company grants a license, which gives customers the right to practice U.S. Patent No. 8,198,350. A World Patent is pending under publication number WO2011/100033A1 for customers outside the U.S.
ICL Performance Products production centres are located in North and South America, Europe, Australia, China and Israel. The company manufactures and markets industrial grades of phosphate salts, phosphoric acid, specialty phosphates products and services for water treatment, detergents, construction, and paper, and also produces food additives and hygiene products.