| abstract |
1-butene propylene ethylene terpolymer having a propylene derived unit content in the range of 0.1 to 10% by weight and an ethylene derived unit content in the range of 0.1 to 3% by weight, having the following characteristics: a) molecular weight distribution Mw / Mn measured by GPC of less than 3.5; b) melting point (DSC) which is between 60 ° C. and 120 ° C .; c) 1-butene unit content in isotactic pentad (mmmm) form greater than 95%. |