Polimeri Europa S.p.a.

Enichem S.p.a

Versalis S.p.a.

Luca Monti

Alessandro Casalini

Aldo Longo

Anna Grazia Rossi

Leonardo Chiezzi

Giuseppe Romagnoli

A process for the preparation of vinylaromatic (co)polymers grafted on an elastomer comprising a rigid matrix consisting of vinylaromatic polymers or copolymers and of an elastomeric phase dispersed in the matrix in form of particles with a strictly bimodal distribution which comprises the functionalization of a first elastomeric fraction by means of a catalytic system containing a stable free radical initiator and subsequently the polymerization of the thus obtained mixture also in presence of a second non functionalized elastomeric fraction.

Process for the preparation of high impact vinylaromatic (co)polymers grafted on an elastomer

Rubber-reinforced vinyl aromatic polymers having a strictly bimodal morphology, comprising from 55 to 90% by weight of a rigid polymeric matrix and from 10 to 45% by weight of a rubbery phase dispersed inside said rigid polymeric matrix, in the form of grafted and occluded particles and wherein said rubber particles consist of from 60 to 99% by weight of particles with a capsule or 'core-shell' morphology and from 1 to 40% by weight of particles with a 'salami' morphology, said percentages being measured on the basis of the weight of the rubber particles only.

Rubber-reinforced vinyl aromatic polymers

Process for manufacturing vinyl-aromatic polymers reinforced with rubber and with bimodal morphology of the rubber phase, which process comprises:

Process for manufacturing rubber-reinforced vinyl-aromatic polymers

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Mantova, Italy

Luca Monti