公开(公告)号：WO9524443A3

公开(公告)日：1995-11-16

申请号：PCT/EP9500695

申请日：1995-02-25

Applicant: BASF MAGNETICS GMBH ,  WUENSCH THOMAS ,  SARTOR KARL HEINZ ,  SCHULZE AXEL RUEDIGER ,  MUELLER NORBERT ,  EICHER JOCHEN ,  STEPHAN OSKAR

Inventor： WUENSCH THOMAS ,  SARTOR KARL-HEINZ ,  SCHULZE AXEL-RUEDIGER ,  MUELLER NORBERT ,  EICHER JOCHEN ,  STEPHAN OSKAR

IPC: B29B17/02 ,  B29B17/04 ,  C08J11/06 ,  C08J11/08

CPC classification number: B29B17/02 ,  B29B2017/0293 ,  B29K2067/00 ,  B29K2075/00 ,  B29K2705/00 ,  B29L2007/00 ,  C08J11/06 ,  C08J11/08 ,  Y02W30/622 ,  Y02W30/701

Abstract: PCT No. PCT/EP95/00695 Sec. 371 Date Sep. 9, 1996 Sec. 102(e) Date Sep. 9, 1996 PCT Filed Feb. 25, 1995 PCT Pub. No. WO95/24443 PCT Pub. Date Sep. 14, 1995Magnetic powder and substrate material are separately recovered from finely chopped wastes of magnetic recording media consisting of a polymeric substrate and a magnetic layer present thereon in which finely divided magnetic powder is dispersed in crosslinked or uncrosslinked polymeric binder by treating the finely chopped wastes of magnetic recording media in a solution consisting of the potassium salt of a polyunsaturated fatty acid, or a biodegradable cleaning agent comprising phosphates, surfactants and a complexing agent, and one or more organic solvents or water while being subjected to mechanical action, and separately removing the magnetic powder from the substrate material by washing or sedimentation or in a magnetic separator.

Abstract translation: PCT No.PCT / EP95 / 00695 Sec。 371日期1996年9月9日 102（e）日期1996年9月9日PCT 1995年2月25日提交PCT公布。 WO95 / 24443 PCT出版物 日期1995年9月14日磁粉和基片材料分别从精细切碎的由聚合物基底和磁性层组成的磁记录介质的废物中回收，其中细分磁性粉末分散在交联或未交联的聚合物粘合剂中， 在由多不饱和脂肪酸的钾盐组成的溶液或包含磷酸盐，表面活性剂和络合剂的生物可降解清洁剂以及一种或多种有机溶剂或水的机械作用下，将磁性记录介质的切碎的废物，以及 通过洗涤或沉降或磁选机分别从基底材料中除去磁粉。

公开(公告)号：AU1947095A

公开(公告)日：1995-09-25

申请号：AU1947095

申请日：1995-02-25

Applicant: BASF MAGNETICS GMBH

Inventor： WUENSCH THOMAS ,  SARTOR KARL-HEINZ ,  SCHULZE AXEL-RUEDIGER ,  MUELLER NORBERT ,  EICHER JOCHEN ,  STEPHAN OSKAR

IPC: B29B17/02 ,  B29B17/04 ,  C08J11/06 ,  C08J11/08

Abstract: PCT No. PCT/EP95/00695 Sec. 371 Date Sep. 9, 1996 Sec. 102(e) Date Sep. 9, 1996 PCT Filed Feb. 25, 1995 PCT Pub. No. WO95/24443 PCT Pub. Date Sep. 14, 1995Magnetic powder and substrate material are separately recovered from finely chopped wastes of magnetic recording media consisting of a polymeric substrate and a magnetic layer present thereon in which finely divided magnetic powder is dispersed in crosslinked or uncrosslinked polymeric binder by treating the finely chopped wastes of magnetic recording media in a solution consisting of the potassium salt of a polyunsaturated fatty acid, or a biodegradable cleaning agent comprising phosphates, surfactants and a complexing agent, and one or more organic solvents or water while being subjected to mechanical action, and separately removing the magnetic powder from the substrate material by washing or sedimentation or in a magnetic separator.

公开(公告)号：DE19531886A1

公开(公告)日：1997-03-06

申请号：DE19531886

申请日：1995-08-30

Applicant: BASF MAGNETICS GMBH

Inventor： STEPHAN OSKAR ,  WEINGART FRANZ DR ,  BURKHARDT UWE ,  THIELE HEINO DR ,  SCHWARZ LOTHAR ,  MUELLER NORBERT DR ,  EICHER JOCHEN DR

IPC: B29B17/02 ,  C08J11/08 ,  C08J11/04

Abstract: Large amounts of coated foils can be fed to a continuous recycling process in which the coating carrier material and any pigments present in the coating can be recovered. The treatment is carried out at room temperature in an alkaline medium comprising soft soap, organic solvents and/or water, optionally with the use of catalyst. The solvent is recirculated. After the first treatment step, the foil shreds can be treated in a second step with a solvent - water mixture, in a similar manner to the first step. A third step involves thorough final washing in a water or solvent circuit. The recovered foil shreds are dried, pressed, ground and shaped as desired in a plastics agglomerator and the recovered pigments are dried in a vacuum. The process and devices can advantageously be used for any type of coating carriers or printed carriers, for example magnetic coating carriers, printed plates or pigment-free coating carriers.

公开(公告)号：DE4407900A1

公开(公告)日：1995-09-14

申请号：DE4407900

申请日：1994-03-09

Applicant: BASF MAGNETICS GMBH

Inventor： WUENSCH THOMAS ,  SARTOR KARL-HEINZ ,  SCHULZE AXEL-RUEDIGER ,  MUELLER NORBERT ,  EICHER JOCHEN ,  STEPHAN OSKAR

IPC: B29B17/02 ,  B29B17/04 ,  C08J11/06 ,  C08J11/08 ,  C08J11/04

Abstract: The invention concerns the recovery for re-use of magnetic powder and polyethyleneterephthalate from a magnetic recording carrier consisting of a PET layer carrier and a magnetic layer cast thereon, in which finely particulate magnetic powder is finely dispersed in a polyurethane binder. According to the invention, finely cut waste magnetic tape is treated at a high temperature in an alkaline medium consisting of potassium salts of polyunsaturated fatty acids, one or more organic solvents and optionally water, a catalyst and surfactants. The magnetic layer detached in this way is separated from the layer carrier by a washing process and then both the layer carrier and the magnetic powder are dried. The valuable substances recovered in this way can be subjected to further processing and used for other application purposes.