Abstract: A process for making a multiphase polymeric film having a lamellar structure with controlled permeability and/or controlled mechanical properties, comprising the steps of: preparing a molten blend made of a first polymer phase dispersed in a second polymer phase which is a matrix polymer phase incompatible with the said first phase and of a compatibilizer selected from the group consisting of DEM, MAH, DEM-g-SEBS, MAH-g-SEBS, DEM-g-PP and MAH-g-PP; extruding the molten blend through a flat die provided with an exit and stretching the so extruded blend downwards said exit at a preselected stretching ratio to produce the said multiphase polymeric film, and solidifying the extruded film sufficiently rapidly to preserve the lamellar structure and the multiphase polymeric films thereby obtained. Granules with a lamellar structure are obtained by grinding the so obtained multiphase polymeric film and are useful for preparing shaped articles with improved physical properties.

Abstract: A paving composition comprises a mixture of about 90 to 99.5 wt. % of an asphaltic material and about 0.5 to 10 wt. % of solid particles each encapsulated with a cross-linked polymer, the encapsulated particles being uniformly dispersed in the asphaltic material. The encapsulated particles have a particle-to-polymer weight ratio so as to provide a density match between the encapsulated particles and the asphaltic material. The paving composition according to the invention has a higher complex viscosity at high temperatures (60° C.) and is more ductile at low temperatures (−15° C.) in comparison with the base asphaltic material. Moreover, the composition is completely stable at elevated temperatures (160° C.) or during long periods of storage.