公开(公告)号：DE1805634A1

公开(公告)日：1970-07-16

申请号：DE1805634

申请日：1968-10-26

Applicant: BASF AG

Inventor： HARTMANN DR JOB-WERNER ,  HEINZ STRITZINGER DIPL-ING ,  GEORG SCHNELL DR ,  WERNER SENKPIEL DR ,  HANS-JOERG HARTMANN DR ,  ALBERT SOBOTTA DR ERICH ,  KARL UHL DIPL-ING DR ,  GERHARD WERST DR

IPC: C08L25/08 ,  C08L63/00 ,  C09D5/23 ,  G11B5/702 ,  G11B5/70

Abstract: Finely divided magnetic particles in a polymeric binding medium are brought as a layer on the carrier, followed by drying and hardening. Mixture consists of (A) 65-95% by weight of a copolymer with monomeric structure consisting of (1) 40-80% alkenyl aromatic hydrocarbons (8-10C atoms), (2) 0-55% acryl- and methacryl esters of alcohols of 1-12 C atoms. (3) 0-15% alkenic unsatd. acids (3-5 C atoms) and/or 0-20% unsatd. alcoholic monomers. (4) 5-40% alkoxy N-methylolamides of acrylic and methacrylic acids, (5) 0-30% of another unsatd. monomer with (B) 35-5% by wt. of a hardening polyepoxy compound, and as magnetic pigment gamma-iron (III)-oxide treated with a C14-C18 alkyl aryl sulphonic acid or salt. Layer deposited on the non-magnetic metal carrier by a centrifugal process.

公开(公告)号：DE1278653B

公开(公告)日：1968-09-26

申请号：DEB0065541

申请日：1962-01-17

Applicant: BASF AG

Inventor： KESSLER DR HANSJUERGEN ,  WILHELM DR HANS ,  WESSLAU DR HERMANN ,  STEDEN DR FRANZ ,  HARTMANN DR JOB-WERNER

IPC: C09D125/14 ,  C09D157/04

公开(公告)号：DE1248195B

公开(公告)日：1967-08-24

申请号：DEB0076740

申请日：1964-05-13

Applicant: BASF AG

Inventor： BRUNNMUELLER DR FRIEDRICH ,  SUTER DR HUBERT ,  HARTMANN DR JOB-WERNER

IPC: C08G63/553 ,  C09D167/08

公开(公告)号：DE1241490B

公开(公告)日：1967-06-01

申请号：DEB0084502

申请日：1965-11-13

Applicant: BASF AG

Inventor： WERST DR GERHARD ,  WILHELM DR HANS ,  BECHT DR GUENTER ,  UHL DR-ING K ,  WAGNER DR HERBERT ,  SENKPIEL DR WERNER ,  SCHNELL DR GEORG ,  HARTMANN DR JOB-WERNER

IPC: C08L77/00 ,  C09D5/23 ,  G11B5/702

公开(公告)号：DE1240934B

公开(公告)日：1967-05-24

申请号：DEB0083746

申请日：1965-09-15

Applicant: BASF AG

Inventor： WILHELM DR HANS ,  BECHT DR GUENTER ,  HENKLER DR HERBERT ,  SCHNELL DR GEORG ,  HARTMANN DR JOB-WERNER

IPC: C09D5/23 ,  G11B5/702

公开(公告)号：DE1907957A1

公开(公告)日：1970-08-20

申请号：DE1907957

申请日：1969-02-18

Applicant: BASF AG

Inventor： HARTMANN DR HEINRICH ,  HARTMANN DR JOB-WERNER ,  WILHELM DR HANS ,  SCHNELL DR GEORG ,  KITTLER DR WOLFRAM ,  WERST DR GERHARD ,  BAUR DR REINHOLD

IPC: C08G18/62 ,  C09D5/23 ,  G11B5/702 ,  H01F10/02

Abstract: 1290834 Magnetic recording media BADISCHE ANILIN- & SODA-FABRIK AG 17 Feb 1970 [18 Feb 1969] 7488/70 Heading H1H In magnetic recording media comprising a non-magnetic support, e.g. tape or disc, bearing a dried or cured layer of magnetic particles dispersed in a binder, comprising a mixture of (A) a polyisocyanate (B) a OH-group-containing copolymer and (C) an organic solvent non- reactive to isocyanate groups, the polymer B is made by polymerizing, in an organic solvent, (1) 7-25 wt. per cent of an acrylic or methacrylic monoester of a C 2 -C 8 dihydric aliphatic alcohol; (2) 25-83 wt. per cent of an acrylic or methacrylic ester of a C 1 -C 8 monohydric aliphatic alcohol; (3) 10-50 wt. per cent vinylidene chloride. Up to 25 wt. per cent of further monoolefinically unsaturated monomers may be used in making the copolymer, provided that not more than 3À5% of these monomers, based on the total weight of monomers, contains groups reactive to isocyanate. The binder may be modified by addition of another copolymer of olefinically-unsaturated monomers in an amount less than B. Specified magnetic particles, are acicular or cubic γ-Fe 2 O 3 (0À1-2 Á), Fe, Co, alloys of Fe, Co, and/or Ni, chromium oxide and mixtures of iron oxides with or without other metal oxides. The proportion of magnetic particles to binder is suitably 2À4-4À5 : 1. In making the recording media, the coated and dried support may be pressed between rollers at 20-80‹ C., and tempered at 60-80‹ C. for 1-3 days. In examples, the magnetic particles are γ-Fe 2 O 3 and the binder components A and B are: (1) and (4) A-4,4 1 -diisocyanato-diphenyl methane; B - 1,4 - butanediol monoacrylate/n - butyl acrylate / acrylic acid / vinylidene chloride copolymer; (2) A-4,4 1 -diisocyanatodicyclohexylmethane; B- as (1); (3) A-4,4 1 -diisocyanato - diphenylmethane; B - 1,4 - butanediol monoacrylate / n - butyl acrylate / acrylonitrile/ vinylidene chloride copolymer. Binder (1) also contains vinyl chloride / acetate / alcohol copolymer, and binder (3) also contains vinyl chloride / diethyl maleate / dimethyl maleate copolymer.

公开(公告)号：DE1804393A1

公开(公告)日：1970-05-27

申请号：DE1804393

申请日：1968-10-22

Applicant: BASF AG

Inventor： HARTMANN DR JOB-WERNER ,  SCHNELL DR GEORG ,  SENKPIEL DR WERNER ,  STRITZINGER DIPL-ING HEINZ ,  SOBOTTA DR ERICH ,  HARTMANN DR HANS-JOERG ,  WERST DR GERHARD ,  UHL DR-ING KARL

IPC: C09D5/23 ,  C09D7/12 ,  G11B5/708 ,  G11B5/73 ,  G11B5/82 ,  G11B5/00

公开(公告)号：DE1278514B

公开(公告)日：1968-09-26

申请号：DEB0091886

申请日：1967-04-03

Applicant: BASF AG

Inventor： HARTMANN DR JOB-WERNER ,  SCHNELL DR GEORG ,  SCHMIDT DR ERWIN ,  GRESS FRIEDRICH

IPC: C09D5/23 ,  G11B5/71 ,  G11B

公开(公告)号：DE1260132B

公开(公告)日：1968-02-01

申请号：DEB0088243

申请日：1966-07-27

Applicant: BASF AG

Inventor： SCHNELL DR GEORG ,  KASTNING DR ERNST-GUENTHER ,  HOFMANN DR HERMAN PANKRAZ ,  HARTMANN DR JOB-WERNER ,  CHRISTOPH DR HELMUT

IPC: C08J3/09 ,  C08K3/22 ,  C09D5/23 ,  C09D153/02 ,  G11B5/702

公开(公告)号：DE1248196B

公开(公告)日：1967-08-24

申请号：DEB0076768

申请日：1964-05-14

Applicant: BASF AG

Inventor： BRUNNMUELLER DR FRIEDRICH ,  SUTER DR HUBERT ,  HARTMANN DR JOB-WERNER

IPC: C08G63/553 ,  C09D167/08