Himont Incorporated

Giuseppe Gorini

Enea Garagnani

Giancarlo Caselli

Mauro Bassi

Disclosed are olefin polymers in nonextruded, aspolymerized particle form having a regular, essentially symmetrical geometrical shape, which are stabilized by depositing on their surface a mixture which is either melted, or in which at least stabilizer (A) is in the liquid state, and which comprises the following stabilizers (percent by weight on the polymer):

Process for the stabilization of polyolefin and products obtained thereby

Elastoplastic compositions comprising a continuous crystalline polyolefin phase and at least two phases discretely dispersed in the polyolefin phase, one of which is a dynamically cured EPDM rubber and the other an amorphous and thermoplastic styrene polymer, in which at least 80% of the dispersed particles has a maximum size preferably below 5 .mu.m. The compositions are prepared by masticating a mixture of the components under conditions of dynamic curing of rubber.

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Ferrara, Italy

Giuseppe Gorini