Pirelli & C. S. P. a.

Michele Galbusera

Vincenzo Boffa

Franco Peruzzotti

Diego Tirelli

Luca Castellani

Enrico Albizzati

Cristiano Puppi

Stefano Testi

Antonio Monterosso

Matteo Di Biase

Fabio Roncella

A process for producing a rubber powder from a vulcanized rubber material by the steps of: a) feeding a grinding device with the vulcanized rubber material; b) contacting the vulcanized rubber material with at least one liquid coolant; c) introducing at least one grinding aid additive into the grinding device; d) operating the grinding device so as to grind the vulcanized rubber material to form a rubber powder, and e) discharging the rubber powder from the extruder.

Pulverization process of a vulcanized rubber material

A thermoplastic material has a) from 5% weight to 95% by weight, preferably from 10% by weight to 60% by weight, of vulcanized rubber in a subdivided form; b) from 5% by weight to 95% by weight, preferably from 40% by weight to 90% by weight, of at least one heterophase copolymer having a thermoplastic phase made from a propylene homopolymer or copolymer and an elastomeric phase made from a copolymer of ethylene with an &#x3b1;-olefin, preferably with propylene; c) from 0% by weight to 90% by weight, preferably from 0% by weight to 50% by weight, of at least one &#x3b1;-olefin homopolymer or copolymer different from b); the amounts of a), b) and c) being expressed with respect to the total weight of a)+b)+c). The thermoplastic material shows improved mechanical properties, in particular, improved elongation at break.

Thermoplastic material comprising a vulcanized rubber in a subdivided form

Growing community of inventors

Milan, Italy

Michele Galbusera