Polymeric compositions suitable for use as bitumen modifiers and bituminous compositions so modified

摘要: POLYMERIC COMPOSITIONS SUITABLE FOR USE AS BITUMEN MODIFIERS AND BITUMINOUS SO MODIFIED 1) Polymeric compositions, suitable for use as bitumen modifiers, comprising, by weight: a) 20-50% of an ethylene/propylene elastomeric copolymer containing from 60 to 75% weight ethylene, and having a value Mooney viscosity - (ML 1 +4) at 100°C higher than 5; b) 0-25% polypropylene prevailingly constituted isotactic macromolecules M.I. 1; c) 0-70% substantially amorphous polypropylene, possibly in mixture with copolymers ethylene propylene, such component (c) total combined content lower 60% weight, intrinsic (in tetralin 135°C) 2 dl/g; d) polyethylene density comprised between 0.98 0.96 g/cm 3 , e) ethylene/vinyl acetate (EVA) 95% 0.1, the condition that when is equal zero, d e are each present amount greater 15% sum components (a) (e) being = 100. 2) Bituminous compositions mixture, 10% 30% referred composition polymeric defined above.