POLYOLEFIN GAS PHASE POLYMERIZATION WITH 3-SUBSTITUTED C4-10-ALKENE
An alkene interpolymer is prepared by polymerizing at least one 3-substituted C 4-10 alkene and at least one C 2-8 alkene in a gas phase polymerization using a Ziegler Natta polymerization catalyst system.
1 . A process for the preparation of an alkene interpolymer, comprising:
polymerizing at least one 3-substituted C 4-10 alkene and at least one C 2-8 alkene in a gas phase polymerization using a Ziegler Natta polymerization catalyst system.
2 . The process as claimed in claim 1 , wherein said catalyst system is in particulate form.
3 - 5 . (canceled)
6 . The process as claimed in claim 1 , wherein said C 2-8 alkene is ethylene or propylene.
7 . The process as claimed in claim 1 , wherein said 3-substituted C 4-10 alkene is a compound of formula (I)
wherein R 1 is a substituted or unsubstituted, preferably unsubstituted, C 1-6 alkyl group and n is an integer between 0 and 6.
8 . The process as claimed in claim 1 , wherein said 3-substituted C 4-10 alkene is 3-methyl-1-butene.
9 . The process as claimed in claim 1 , wherein said process is continuous.
10 . The process as claimed in claim 1 , wherein a total productivity of the catalyst system is at least 1000 g polymer per g solid catalyst.
11 . The process as claimed in claim 1 , wherein said alkene interpolymer comprises 3-substituted C 4-10 alkene comonomer in an amount of 0.01-40 wt % based on the total weight of the interpolymer.
12 . The process as claimed in claim 1 , wherein said alkene interpolymer comprises C 2-8 alkene monomer in an amount of at least 60 wt % based on the total weight of the interpolymer.
13 . The process as claimed in claim 1 , wherein said alkene interpolymer comprises two C 2-8 alkene monomers and at least one 3-substituted C 4-10 alkene monomer.
14 . The process as claimed in claim 1 , wherein said alkene interpolymer has a MFR 21 of greater than 0.01 g/10 min.
15 . The process as claimed in claim 1 , wherein said alkene interpolymer is unimodal.
16 . The process as claimed in claim 1 , wherein said process is carried out in condensed or supercondensed mode.
17 . The process as claimed in claim 1 , wherein said alkene interpolymer comprises less than 1200 ppm by weight of ash.
18 . The process as claimed in claim 1 , wherein said polymerization is carried out in a concentration of C 3-8 alkane of lower than 10 mol %.
19 . The process as claimed 1, wherein said 3-substituted C 4-10 alkene constitutes more than 5 wt % of a liquid that is continuously fed to a gas phase polymerization reactor.