公开(公告)号：DE59102718D1

公开(公告)日：1994-10-06

申请号：DE59102718

申请日：1991-06-22

Applicant: BASF AG

Inventor： ACKER MICHAEL DR ,  NEUMANN PETER DR ,  ALBERT BERNHARD DR ,  BROSIUS SIBYLLE DR ,  SCHOMANN KLAUS DIETER DR ,  KUPPELMAIER HARALD DR

IPC: B41M5/26 ,  C09B23/00 ,  C09B23/01 ,  C09B23/08 ,  G11B7/24 ,  G11B7/244 ,  G11B7/2472 ,  G11B7/253 ,  G11B7/2531 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/258 ,  G11B7/2585 ,  G11B7/2595

公开(公告)号：DE59006210D1

公开(公告)日：1994-07-28

申请号：DE59006210

申请日：1990-10-15

Applicant: BASF AG

Inventor： SCHMITT MICHAEL DR ,  ALBERT BERNHARD DR ,  BROSIUS SIBYLLE DR ,  SCHOMANN KLAUS DIETER DR ,  KUPPELMAIER HARALD DR

IPC: B41M5/26 ,  C07C233/10 ,  C09B57/00 ,  G03C1/72 ,  G11B7/24

Abstract: Azulene squaric acid dyes containing amide groups, of the formula … … in which …… L denotes C1-C12-alkylene which is optionally substituted by phenyl, … R and R independently of one another denote hydrogen, optionally substituted C1-C20-alkyl, C5-C7-cycloalkyl, optionally substituted phenyl, 2,2,6,6-tetramethylpiperidin-4-yl or cyclohexylaminocarbonyl and … R , R , R and R independently of one another denote hydrogen or optionally substituted C1-C12-alkyl, … with the proviso that if R denotes hydrogen the ring positions of the substituents CH2-L-CO-NR R and R on one or both azulene rings can also be interchanged with one another within an azulene ring, their intermediate products and an optical recording medium which contains the novel dyes.

公开(公告)号：DE3783982D1

公开(公告)日：1993-03-18

申请号：DE3783982

申请日：1987-09-17

Applicant: BASF AG

Inventor： DUST MATTHIAS DR ,  NEUMANN PETER DR ,  HAUSER PETER DR ,  WAGENBLAST GERHARD DR ,  BENTHACK-THOMS HEIDI DR ,  BARZYNSKI HELMUT DR ,  SCHOMANN KLAUS DIETER DR ,  KUPPELMAIER HARALD DR

IPC: C09B57/06 ,  G11B7/24

Abstract: New naphtholactam-quadratic acid dyestuffs are 2,4-bis(benz(cd)indol-2-yl) methenyl-quadratic acid betaines of formula (I). R1 and R2 independently = opt. substd. 3-22C alkyl, opt. with O atoms in the chain, 1-4C aralky, 5-7C cycloalkyl or phenyl gps.; rings A, B, C and D can be substd. or benzo-anellated.

公开(公告)号：DE4016298A1

公开(公告)日：1991-11-28

申请号：DE4016298

申请日：1990-05-21

Applicant: BASF AG

Inventor： ACKER MICHAEL DR ,  ALBERT BERNHARD DR ,  BROSIUS SIBYLLE DR ,  SCHOMANN KLAUS DIETER DR ,  KUPPELMAIER HARALD DR

IPC: C09B23/00 ,  B41M5/26 ,  C09B23/01 ,  C09B23/08 ,  C09K11/06 ,  G11B7/24 ,  G11B7/244 ,  G11B7/246 ,  G11B7/247 ,  G11B7/2472 ,  G11B7/249 ,  G11B7/2495 ,  G11B7/253 ,  G11B7/2531 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2535 ,  H05B33/12 ,  H05B33/14

Abstract: Polymethine dyes suitable for use in an optical recording medium have the formula where p is 0 or 1, Z is nitrogen, oxygen, sulfur, isopropylidene, cyclohexylidene or the radical -CH=CH-, Q is a radical of the formula where R2 is hydrogen, chlorine, bromine or C1-C6-alkyl, L is C1-C12-alkylene, or a single bond R1 is hydrogen, substituted or unsubstituted C1-C20-alkyl, substituted or unsubstituted C5-C7-cycloalkyl or substituted or unsubstituted phenyl, X(-) is an anion, and the rings A may each be substituted or benzofused.

公开(公告)号：DE3505751A1

公开(公告)日：1986-08-21

申请号：DE3505751

申请日：1985-02-20

Applicant: BASF AG

Inventor： SCHROTT WOLFGANG DR ,  NEUMANN PETER DR ,  ALBERT BERNHARD DR ,  THOMAS MICHAEL DR ,  BARZYNSKI HELMUT DR ,  SCHOMANN KLAUS DIETER DR ,  KUPPELMAIER HARALD DR

IPC: C07F15/00 ,  B41M5/26 ,  B41M5/28 ,  C07C45/46 ,  C07C45/63 ,  C07C45/64 ,  C07C45/68 ,  C07C49/782 ,  C07C49/82 ,  C07C49/83 ,  C07C49/84 ,  C07F15/04 ,  C09B57/10 ,  G03C1/72 ,  G03C1/735 ,  G11B7/244 ,  G11B7/249 ,  C07C149/273 ,  C07C149/267 ,  G11B7/24

公开(公告)号：DE3271004D1

公开(公告)日：1986-06-12

申请号：DE3271004

申请日：1982-08-27

Applicant: BASF AG

Inventor： ROOS ROLAND ,  SCHOMANN KLAUS DIETER DR ,  MUENZNER WULF DR

IPC: G11B15/60 ,  G11B23/04 ,  G11B23/087 ,  G11B23/50 ,  H05F3/00

Abstract: A tape guide system wherein a magnetic tape having different resistivities on its back and front travels in contact with guide elements, the members of these elements which are in contact with the tape being matched to the relevant face of the tape in respect of surface resistivity and/or of charge affinity. The members contacting the front of the magnetic tape accordingly consist of a conductive or low-insulation material and the members contacting the back of the tape consist of a high-insulation material. In alternative embodiments, the contact members can consist of a material of low conductivity, or of a plastic with an added conductive material. The novel guide system can be used in any type of high-speed magnetic tape transport mechanism. The invention also concerns the tape guide elements per se, and magnetic tape cassettes employing the tape guide system.

公开(公告)号：DE3426192A1

公开(公告)日：1986-01-30

申请号：DE3426192

申请日：1984-07-17

Applicant: BASF AG

Inventor： ALBERT BERNHARD DR ,  NEUMANN PETER DR ,  BERGMANN UDO DR ,  SCHOMANN KLAUS DIETER DR

IPC: G11B7/244 ,  G11B7/24 ,  G03C1/72

Abstract: Optical recording medium comprising a substrate which, as the light-absorbing layer, comprises at least one dye of the formula (I) or a layer containing this dye. In the formula, X is cyano or halogen, Y is hydrogen, C1- to C4-alkyl or C1- to C4-alkoxy, R and R , independently of one another, are C1- to C6-alkylcyanoethyl, C1- to C4-alkoxy-C2- or -C3-alkyl, C2 - to C4-hydroxyalkyl, C3- to C6-alkenyl or C1- to C4-alkanoyloxy-C2- or -C3-alkyl or is a saturated heterocyclic ring, R is C1- to C4-alkanoyl or optionally substituted benzoyl. The dyes (I) have an absorption maximum in the range from 600 to 660 nm. The dyes are very stable and nontoxic. The recording media can be written and read using an He-Ne laser.

公开(公告)号：DE3267453D1

公开(公告)日：1985-12-19

申请号：DE3267453

申请日：1982-08-27

Applicant: BASF AG

Inventor： BALZ WERNER DR ,  MUENZNER WULF DR ,  SCHOMANN KLAUS DIETER DR ,  BERGER HEINZ ,  ROOS ROLAND

IPC: G11B15/60 ,  G11B23/04 ,  G11B23/087 ,  G11B23/50 ,  H05F3/02

Abstract: In a tape cassette, particularly a video tape cassette, equalization of electrostatic charges between the two faces of the tape is effected by a connector element or connector elements electrically connecting at least one of two electrically conducting guide elements contacting the front of the tape and provided on the two sides, respectively, of the cassette with at least the associated one of two electrically conducting tape deflecting elements provided in the two respective front corners of the tape cassette. In this manner sticking of the tape to the deflecting elements due to electrostatic attraction therebetween and also the build-up of electrostatic charges along the tape path parallel to the front of the cassette housing due to the transporting of such charges from the deflecting elements as a result of the tape travel, are counteracted.

公开(公告)号：DE58907173D1

公开(公告)日：1994-04-14

申请号：DE58907173

申请日：1989-10-19

Applicant: BASF AG

Inventor： HACK JOACHIM ,  GRAU WERNER DR ,  SICKMUELLER WERNER ,  MANNSPERGER HEINRICH DR ,  JAKUSCH HELMUT DR ,  SCHOMANN KLAUS DIETER DR ,  HAMMERSCHMITT PETER ,  BROSIUS SIBYLLE DR ,  FEUERHERD KARL-HEINZ DR ,  ALBERT BERNHARD DR ,  SCHMITT MICHAEL DR ,  ACKER MICHAEL DR

IPC: G11B5/41 ,  G11B5/54 ,  G11B7/005 ,  G11B11/105 ,  G11B19/04 ,  G11B19/06 ,  G11B33/14

公开(公告)号：DE59004122D1

公开(公告)日：1994-02-17

申请号：DE59004122

申请日：1990-10-19

Applicant: BASF AG

Inventor： ACKER MICHAEL DR ,  NEUMANN PETER DR ,  ALBERT BERNHARD DR ,  BROSIUS SIBYLLE DR ,  SCHOMANN KLAUS DIETER DR ,  KUPPELMAIER HARALD DR

IPC: B41M5/26 ,  C09B23/00 ,  C09B23/01 ,  C09B23/02 ,  C09B23/08 ,  G03C1/72 ,  G11B7/24 ,  G11B7/2472 ,  G11B7/253 ,  G11B7/2531 ,  G11B7/2533 ,  G11B7/2534

Abstract: Quinoxalinepentamethine dyes of the formula where R1 is hydrogen, substituted or unsubstituted C1-C22-alkyl or substituted or unsubstituted C5-C7-cycloalkyl, R2 is hydrogen, chlorine, bromine or C1-C6-alkyl, Y is a radical of the formula -N=C(CH3)- or -N(R1)-CO-, where R1 is as defined above, Z1 and Z2 are each hydrogen or together are unsubstituted or substituted C2-C3-alkylene, X(-) is an anion and the rings A and B independently of each other may be substituted and/or benzofused and are useful in optical recording media.