公开(公告)号：DE4231748A1

公开(公告)日：1994-03-24

申请号：DE4231748

申请日：1992-09-23

Applicant: BASF AG

Inventor： FAURH KARL-HEINZ ,  ISBARN GUNTHER DR

IPC: C08F2/06 ,  C08F2/38 ,  C08F10/00 ,  C08F10/10

Abstract: A process for reaction control in the preparation of polyisobutylene by polymerisation of isobutylene at temperatures from -130 DEG to 0 DEG C in the presence of from 0.01 to 1.0% by weight of a Friedel-Crafts catalyst, from 0.0001 to 0.1% by weight of a molecular weight regulator and a low-boiling solvent which is inert under the reaction conditions, where the % by weight are each based on the isobutylene employed, in which the solvent evaporated during the polymerisation is drawn off continuously, liquefied and recycled in the liquid state into the polymerisation zone, characterised in that the molecular weight regulators used are vinyl ethers. The vinyl ether used in the process acts both as accelerator and retarder of the cationic polymerisation.

公开(公告)号：DE4319181A1

公开(公告)日：1994-01-27

申请号：DE4319181

申请日：1993-06-09

Applicant: BASF AG

Inventor： GROPPER HANS DR ,  KOLK ERICH DR ,  FAUTH KARL-HEINZ ,  ISBARN GUNTHER DR ,  SCHERER GUENTER DR

IPC: C08F10/10 ,  C08J3/00 ,  C08L23/22 ,  C08L23/20 ,  C08F6/10 ,  C08F110/10 ,  C08J3/20

Abstract: A continuous process for the prodn. of blends of polyisobutylene (I) and at least another polymer (II) is claimed in which (a) isobutylene is continuously polymerised in pure, dry liq. ethylene (b) the resulting (I) is fed directly to a degassing extruder where it is melted and degassed and (c) (I) is mixed with (II) resulting in a blend characterised by (d) (II) being directly dosed in the required amt. into the degassing extruder and mixed there with (I). Also claimed is a continuous process for the prodn. of a mixt. of (I) with fillers and/or additives whereby after steps (a) and (b) there follows steps (C') (I) is mixed with fillers and/or additives whereby (d') the fillers and/or additives are directly dosed in the required amt. into the degassing extruder and mixed there with (I). (II) is a thermoplastic, pref. a polyolefin and is mixed with (I) either before or after the degassing. Fillers and/or additives are used as well as (II). USE/ADVANTAGE - The process is useful for the prepn. of blends and/or mixts of (I) with (II) and fillers and/or additives. The process enables blends and mixts. to be prepd. in a simpler and more cost effective manner than prior art.

公开(公告)号：DE4224097A1

公开(公告)日：1994-01-27

申请号：DE4224097

申请日：1992-07-22

Applicant: BASF AG

Inventor： ISBARN GUNTHER DR ,  FAUTH KARL-HEINZ ,  KOLK ERICH DR

IPC: B09B3/00 ,  B09C1/08 ,  C08J11/06 ,  C08K11/00 ,  C08L23/22 ,  C09K3/22 ,  A62D3/00 ,  C08L23/20 ,  C08J3/20 ,  B09B1/00

Abstract: Polyisobutylene and blends of polyisobutylene and at least one thermoplastic compatible therewith are highly suitable for the disposal of pollutant-containing solids and/or dusts. For this purpose, the solids and dusts in question are mixed with polyisobutylene or the blends, after which the resultant mixtures are advantageously further converted into granules or mouldings. Both the mixtures and the granules and mouldings are water-resistant, so that they can be ultimately landfilled without reservations.