公开(公告)号：JPH1171432A

公开(公告)日：1999-03-16

申请号：JP14730498

申请日：1998-05-28

Applicant: BASF AG

Inventor： KERSTING MEINOLF DR ,  SCHOENE WERNER ,  LANGHAUSER FRANZ DR

IPC: C08F2/34 ,  C08F4/02 ,  C08F4/642 ,  C08F4/654 ,  C08F4/658 ,  C08F10/00 ,  C08F210/06 ,  C08F210/16

Abstract: PROBLEM TO BE SOLVED: To obtain a copolymer having high rigidity and a low chlorine content, by copolymerizing propylene with ethylene and a specified alkene in the absence of a liquid reaction medium under conditions in which the ratio among the partial pressures of the respective monomers is specified. SOLUTION: Propylene is copolymerized with ethylene and a 4-10 C 1-alkene in the absence of a liquid reaction medium under conditions in which the ratio of the partial pressure of propylene to that of ethylene is 20:1 to 100:1, and the ratio of the partial pressure of the 1-alkene to that of the ethylene is 2.5:1 to 20:1 in the presence of a Ziegler/Natta catalyst containing a titanium- containing solid component containing a halogen-containing magnesium, an electron donor and an inorganic oxide carrier, an aluminum compound and an electron donor mixture in a gas phase under a pressure of 15-40 bar at a temp. of 50-100 deg.C for 0.5-5 hr to obtain a random propylene copolymer having a number-average molecular weight of 20,000-50,000, a melt flow index of 0.1-100 g/10 min and a melting point (DSC) of 135 deg.C or below.

公开(公告)号：DE19813399A1

公开(公告)日：1999-09-30

申请号：DE19813399

申请日：1998-03-26

Applicant: BASF AG

Inventor： LANGHAUSER FRANZ ,  APPLEYARD DAVID ,  HORTON MURRAY ,  HINGMANN ROLAND ,  SCHWEIER GUENTHER ,  RAUSCHENBERGER VOLKER ,  HENNIG INGOLF ,  LILGE DIETER ,  SCHOENE WERNER ,  KERSTING MEINOLF

IPC: C08F2/34 ,  C08F4/02 ,  C08F4/658 ,  C08F210/06 ,  C08F210/16 ,  D01F6/30

Abstract: A random copolymer (I) of propylene with other 2-10 C 1-alkenes comprises 0.7-1.4 wt.% ethylene comonomer or 0.7-3.0 wt.% 4-10 C 1-alkene. (I) has a solubility in cold xylene of 1.0-2.5 wt.% or 0.75-2.0 wt.% when the comonomer is ethylene or a 4-10C 1-alkene respectively. Independent claims are included for: (i) a process for the preparation of (I) by the gas phase polymerisation of propylene and a 2-10 C 1-alkene at 50-100 degrees C and 15-40 bar in the presence of a Ziegler-Natta catalyst containing: (A) a titanium containing solid component containing at least a halogen containing magnesium compound and an electron donor; (B) an aluminum compound; and (C) at least a further electron donor compound. The ratio of partial pressure of propylene to comonomer is 400:1-15:1 and the molar ratio of (B) to (C) is 20:1-2:1; and (ii) film, fiber or molded articles containing (I).

公开(公告)号：DE19813400A1

公开(公告)日：1999-09-30

申请号：DE19813400

申请日：1998-03-26

Applicant: BASF AG

Inventor： RAUSCHENBERGER VOLKER ,  HINGMANN ROLAND ,  LANGHAUSER FRANZ ,  SCHOENE WERNER

IPC: G01N11/00 ,  G01N33/44 ,  C08J5/18

Abstract: Rheological properties determine the suitability for biaxial orientation. The suitability of a partially crystalline polymers, especially a polypropylene polymer, for the preparation of biaxially oriented foils and films can be decided by determination of its rheological properties. The method involves determination of the viscosity change with temperature in the region of the melting point, definition of a characteristic quantity in such a way that its value is inversely related to the viscosity change with temperature, determination of the extent of strain hardening on partial melting of the polymer, for which a characteristic quantity is so defined that its value is the greater the more marked the strain hardening. Both characteristic quantities when multiplied together are coupled to an end characteristic quantity, so that the suitability of the partially crystalline polymer is the better the larger the value of the end characteristic quantity.