초록 ▼

Amorphous propylene polymers are disclosed having the following characteristics: (a) intrinsic viscosity [h1 d1/g; (b) %(r)-%(m)>0, wherein % (r) is the % of syndiotactic diads and %(m) is the % of isotactic diads; (c) less than 2% of the CH2 groups contained in sequences (CH2)n, with n≥2; (d) Berno

Amorphous propylene polymers are disclosed having the following characteristics: (a) intrinsic viscosity [h1 d1/g; (b) %(r)-%(m)>0, wherein % (r) is the % of syndiotactic diads and %(m) is the % of isotactic diads; (c) less than 2% of the CH2 groups contained in sequences (CH2)n, with n≥2; (d) Bernoullianity index (B)=1±0.2. These propylene polymers, which are in addition endowed with a narrow molecular weight distribution, can be obtained directly from the polymerization reaction of propylene as sole product and, therefore, do not require to be separated.

대표청구항 ▼

A process for the preparation of an amorphous polypropylene, comprising the polymerization reaction of propylene in the presence of a catalyst comprising the product of the reaction between: (A) a compound of formula (I) [Figure] (I) wherein substituents Rl, the same or different from each other, ar

A process for the preparation of an amorphous polypropylene, comprising the polymerization reaction of propylene in the presence of a catalyst comprising the product of the reaction between: (A) a compound of formula (I) [Figure] (I) wherein substituents Rl, the same or different from each other, are hydrogen atoms, C1-C20 alkyl radicals, C3-C20 cycloalkyl radicals, C2-C20 alkenyl radicals, C6-C20 aryl radicals, C7-C20 alkylaryl radicals, or C7-C20 arylalkyl radicals, optionally two adjacent substituents R1 can form a cycle comprising from 5 to 8 carbon atoms and, furthermore, substituents R1 can contain Si or Ge atoms; M is Ti, Zr or Hf; substituents R2, the same or different from each other, are halogen atoms, －OH, －SH, R1, －OR1, －SR1, －NR21 or －PR21 , wherein R1 is defined as above; the group R3 is selected from >CR21, >SiR21, >GeR21, >NR1 or >PR1, wherein R1 is defined as above and optionally, when R3 is >CR21 , >SiR21 or >GeR21, both substituents R1 can form a cycle comprising from 3 to 8 atoms; (B) an alumoxane, or one or more compounds able to give a metallocene alkyl cation.