KAUTSCHUKZUSAMMENSETZUNG FÜR REIFEN BASIEREND AUF EINEM DIENELASTOMER UND EINEM VERSTÄRKENDEN TITANOXYD

摘要

The invention provides rubber composition usable for the manufacture of tires, comprising at least (i) one diene elastomer, (ii) one white filler as reinforcing filler and (iii) one coupling agent (white filler/elastomer), the white filler comprising a titanium oxide having the following characteristics: (a) its specific BET surface area is between 20 and 200 m2/g; (b) its average particle size (by mass), dw, is between 20 and 400 nm; and (c) its disagglomeration rate, alpha, measured by the ultrasound disagglomeration test, at 100% power of a 600-watt ultrasonic probe, is greater than 2x102 mum1/s. The invention also provides for the use of a rubber composition according to the invention for the manufacture of rubber articles, in particular tires or semi-finished rubber products intended for these tires. The composition of the invention is particularly useful for the manufacture of colored tires or colored semi-finished articles such as tire treads or sidewalls.