公开(公告)号：DE3732953C2

公开(公告)日：1996-07-04

申请号：DE3732953

申请日：1987-09-30

Applicant: BASF AG

Inventor： SCHOENE WERNER DR ,  GRUBER WOLFGANG DR ,  DREYER WILHELM DR ,  WERNER RAINER ALEXANDER DR ,  KUCHNER KARL DR ,  HUBER KARL

IPC: C08F2/34 ,  C08F10/06 ,  C08F210/06 ,  C08J5/18 ,  C08L23/14

公开(公告)号：DE3732953A1

公开(公告)日：1989-04-13

申请号：DE3732953

申请日：1987-09-30

Applicant: BASF AG

Inventor： SCHOENE WERNER DR ,  GRUBER WOLFGANG DR ,  DREYER WILHELM DR ,  WERNER RAINER ALEXANDER DR ,  KUCHNER KARL DR ,  HUBER KARL

IPC: C08F2/34 ,  C08F10/06 ,  C08F210/06 ,  C08J5/18 ,  C08L23/14

Abstract: The invention relates to the production of films from propene polymers, characterised in that propene polymers are employed which are obtained by continuous preparation of random copolymers of propene by polymerization of a monomer mixture by means of a Ziegel-Natta catalyst system in the gas phase in a central stirred bed of finely divided polymer with dissipation of the heat of polymerization by evaporative cooling, where the monomer mixture is constantly introduced into the polymerization zone and the polymer is constantly discharged from the polymerization zone, with the provisos that (a) the pressure and temperature in the polymerization zone are kept in a range which corresponds to the gaseous state of the monomer mixture, (b) gaseous, unconsumed monomer mixture is discharged from the polymerization zone and is re-introduced into the polymerization zone in liquid form, (c) the temperature in the polymerization zone is regulated by means of the amount of liquid monomer mixture introduced per time unit, and (d) the monomers consumed by polymerization are replaced, with the particular feature that - using a monomer mixture comprising principally propene, a little ethylene and very little hydrogen - the residence time of the monomer mixture in the polymerization zone is kept very short.

公开(公告)号：DE3732933A1

公开(公告)日：1989-04-13

申请号：DE3732933

申请日：1987-09-30

Applicant: BASF AG

Inventor： SCHOENE WERNER DR ,  GRUBER WOLFGANG DR ,  DREYER WILHELM DR ,  WERNER RAINER ALEXANDER DR ,  KUCHNER KARL DR ,  HUBER KARL

IPC: B32B27/32 ,  C08F2/34 ,  C09J123/14

Abstract: The framework of the invention is the production of heat-sealable films consisting of (i) a basic film of polypropene (polypropylene) and (ii) a heat-sealable layer which is applied to the basic film and comprises a propene polymer with a relatively low softening point. The characteristic feature is that the propene polymers used for the heat-sealable layer are those obtained by continuous production of random copolymers of propene by polymerisation of a monomer mixture by means of a Ziegler-Natta catalyst system in the gas phase in a centric stirred bed comprising small-particulate polymer with removal of the heat of polymerisation by evaporative cooling, the monomer mixture being introduced constantly into the polymerisation zone and the polymer being constantly discharged from the polymerisation zone, with the provisos that (a) in the polymerisation zone pressure and temperature are kept in a range corresponding to the gaseous state of the monomer mixture, (b) gaseous, unconsumed monomer mixture is discharged from the polymerisation zone and reintroduced into the polymerisation zone in the liquid state, (c) the temperature in the polymerisation zone is controlled by means of the amount of liquid monomer mixture introduced per unit time, and (d) the monomer consumed by polymerisation is replaced, with the special feature that - with the use of a monomer mixture comprising principally propene, a little ethene and very little hydrogen - the residence time of the ... Original abstract incomplete.