公开(公告)号：DE2802866A1

公开(公告)日：1979-07-26

申请号：DE2802866

申请日：1978-01-24

Applicant: BASF AG

Inventor： ZACHER WIELAND DIPL CHEM DR ,  PFLEGER KLAUS DIPL CHEM DR ,  BOETTCHER KLAUS DIPL CHEM DR ,  SKORCZYK RONALD ,  BUECHNER OSKAR DIPL CHEM DR

IPC: C08F10/00 ,  C08F2/00 ,  C08F2/34 ,  C08F210/02 ,  C08F10/02

Abstract: A continuous process for the manufacture of ethylene copolymers under high pressure and at high temperature in a polymerization zone, with transfer of the reaction mixture into a high pressure product isolation zone and from there into a low pressure product isolation zone, and recycling of the unconverted gas from the high pressure product isolation zone into the polymerization zone and from the low pressure product isolation zone into a low temperature separator, from where the comonomer separated off is recycled to the polymerization process, while the ethylene is discharged as off-gas. The gas taken off the low pressure product isolation zone is preferably compressed to from 10 to 20 bar and cooled to from -10 DEG to -30 DEG C. before it is fed into the low temperature separator. There is a substantial improvement in the efficiency of separating off the comonomer.

公开(公告)号：DE2854151A1

公开(公告)日：1980-07-03

申请号：DE2854151

申请日：1978-12-15

Applicant: BASF AG

Inventor： PFLEGER KLAUS DIPL CHEM DR ,  ZACHER WIELAND DIPL CHEM DR ,  BOETTCHER KLAUS DIPL CHEM DR ,  SKORCZYK RONALD ,  BUECHNER OSKAR DIPL CHEM ,  MIETZNER FRANZ GEORG DIPL CHEM

IPC: C08F2/00 ,  C08F2/02 ,  C08F2/34 ,  C08F8/00 ,  C08F10/00 ,  C08F210/02

Abstract: A process for the continuous production of an ethylene copolymer by compressing a mixture of ethylene and comonomer in a pre-compressor and a post-compressor, copolymerizing the mixture in a polymerization zone at a high temperature and high pressure, transferring the reaction mixture into a high pressure product isolation zone, from there into a low pressure product isolation zone and thereafter into a discharge extruder, and recycling the greater part of the unconverted monomer into the polymerization process and passing a small part of the unconverted gas into a low temperature isolation zone, in which process a small part of the gas recycled from the high pressure product isolation zone is passed into the low temperature isolation zone, which is preferably under a pressure of from 10 to 30 bar and at from -10 DEG to -50 DEG C., and all the gas taken off the low pressure product isolation zone is fed to the pre-compressor. Using the novel process, the separating-off of the comonomer which has remained unconverted in the polymerization process can be improved.

公开(公告)号：DE2657475A1

公开(公告)日：1978-06-29

申请号：DE2657475

申请日：1976-12-18

Applicant: BASF AG

Inventor： BOETTCHER KLAUS DIPL CHEM DR ,  HOERDT HEINRICH GUENTER DIPL C ,  PFLEGER KLAUS DIPL CHEM DR ,  ZACHER WIELAND DIPL CHEM DR ,  GROPPER HANS DIPL CHEM DR

IPC: C08F2/00 ,  C08F2/02 ,  C08F2/34 ,  C08F2/38 ,  C08F10/00 ,  C08F110/02 ,  C08F210/02 ,  C08F4/28

公开(公告)号：DE2617412A1

公开(公告)日：1977-11-03

申请号：DE2617412

申请日：1976-04-21

Applicant: BASF AG

Inventor： PFLEGER KLAUS DIPL CHEM DR ,  ZACHER WIELAND DIPL CHEM DR ,  BOETTCHER KLAUS DIPL CHEM DR ,  SKORCZYK RONALD ,  BUECHNER OSKAR DIPL CHEM DR ,  MIETZNER FRANZ GEORG DIPL CHEM

IPC: C08F210/02

Abstract: Ethylene copolymers contg. is not >30 wt. % vinyl acetate are prepd. by (a) copolymerisation of ethylene and vinyl acetate at >800 atmos., 150-350 degrees C and a residence time of is not >100 seconds, and (b) passing the prod. from the reaction zone into a cooling zone at 500 atmos. and 150-250 degrees C(200-235 degrees C), and, immediately after the cooling zone, into a high-press. prod. sepn. zone (A); the residence time in the cooling zone and zone A is 2-10 minutes. The prod. is passed from zone A, through a low-press. prod. sepn. zone (B) and into a discharge extruder (C). B and C are connected directly together, without intermediate closure means and the height of filling of B with reaction mixt. is adjusted by discharge from C. The copolymer is esp. used for films. The prod. is very homogeneous and gives films of good quality.

公开(公告)号：DE2617411A1

公开(公告)日：1977-11-03

申请号：DE2617411

申请日：1976-04-21

Applicant: BASF AG

Inventor： PFLEGER KLAUS DIPL CHEM DR ,  ZACHER WIELAND DIPL CHEM DR ,  BOETTCHER KLAUS DIPL CHEM DR ,  SKORCZYK RONALD ,  BUECHNER OSKAR DIPL CHEM DR ,  MIETZNER FRANZ GEORG DIPL CHEM

IPC: C08F210/02

Abstract: Prodn. of ternary copolymers (I) of over 60 (wt.)% ethylene (II), 1-20% t-butyl (meth)acrylate (III) and 1-10% (meth) acrylic acid (IV) involves the copolymerisation of (II) and (III) at 200-350 degrees C and over 800 atmos. After polymerisation, the mixt. is passed into a cooling zone at 200-250 degrees C and under 500 atmos., and then directly into a high press. prod. sepn. zone (A), the dwell time is these 2 zones being 2-10 mins. The improvement comprising passing the mixt. from (A) through a low press. prod. sepn. zone (B) into a discharge extruder (C). B and C are interconnected directly, without a shut-off and the level of the mixt. in B is controlled by the discharge from C. (I) are used esp. as hot melt adhesives, e.g. as thin films, for metals, ceramics, paper, textiles, plastics, wood, glass etc. The prod. has excellent film properties, i.e. homogeneity, even after long reactor operations periods.

公开(公告)号：DE2524230A1

公开(公告)日：1976-12-16

申请号：DE2524230

申请日：1975-05-31

Applicant: BASF AG

Inventor： MIETZNER FRANZ GEORG DIPL CHEM ,  PFLEGER KLAUS DIPL CHEM DR ,  GROPPER HANS DIPL CHEM DR ,  BUECHNER OSKAR DIPL CHEM DR ,  BOETTCHER KLAUS DIPL CHEM DR ,  ZACHER WIELAND DIPL CHEM DR

IPC: C08F6/00 ,  C08F6/06 ,  C08F6/26 ,  C08F10/00 ,  C08F210/00 ,  C08F210/02 ,  C08F218/00 ,  C08F218/02

Abstract: A process for the manufacture of copolymers of ethylene with vinyl acetate at pressures above 800 atmospheres and at from 150 DEG to 350 DEG C, using mean residence times of up to at most 100 seconds. The reaction mixture obtained from the polymerization is kept for from 2 to 10 minutes at from 150 DEG to 250 DEG C under a pressure below 500 atmospheres. Homogeneous ethylene/vinyl acetate copolymers are obtained without the formation of substantial amounts of free acetic acid by decomposition of the vinyl acetate.

公开(公告)号：DE2524274A1

公开(公告)日：1976-12-09

申请号：DE2524274

申请日：1975-05-31

Applicant: BASF AG

Inventor： PFLEGER KLAUS DIPL CHEM DR ,  BOETTCHER KLAUS DIPL CHEM DR ,  ZACHER WIELAND DIPL CHEM DR ,  JUZA DIRK DIPL CHEM DR

IPC: C08F2/00 ,  C08F2/02 ,  C08F6/00 ,  C08F6/06 ,  C08F210/00 ,  C08F210/02 ,  C08F220/00 ,  C08F220/04 ,  C09J123/02

Abstract: A process for the manufacture of copolymers of ethylene with butyl acrylate and acrylic acid at from 200 to 350.degree.C under pressures above 800 atmospheres, in which the reaction mixture obtained from the polymerization is kept for from 2 to 10 minutes at from 200 to 250.degree.C under a pressure of 500 atmospheres. Terpolymers are obtained which may be used as hot-melt adhesives in the form of thin and extremely homogeneous films.