公开(公告)号：DE4238174A1

公开(公告)日：1994-05-19

申请号：DE4238174

申请日：1992-11-12

Applicant: BASF MAGNETICS GMBH

Inventor： BOBRICH MICHAEL DR ,  BRODT GREGOR DR ,  ROLLER HERMANN

IPC: G11B5/72 ,  C09D5/23 ,  C09D175/14 ,  G11B5/73 ,  G11B5/735 ,  G11B5/84

Abstract: The invention relates to flexible, magnetic recording carriers essentially comprising a web-form (sheet-form) nonmagnetic substrate, a magnetic layer applied to the principal side of the web-form substrate, and a back layer (backing) formed on the opposite principal side of the substrate from a polymeric binder and nonmagnetic fillers and supporting pigments.

公开(公告)号：DE4141839A1

公开(公告)日：1993-06-24

申请号：DE4141839

申请日：1991-12-18

Applicant: BASF MAGNETICS GMBH

Inventor： LEHNER AUGUST ,  SCHNEIDER NORBERT ,  BOBRICH MICHAEL DR ,  LENZ WERNER DR ,  BALZ WERNER DR ,  KOHL ALBERT ,  RUDOLF PETER DR ,  BRODT GREGOR DR

IPC: C08G18/10 ,  C08G18/62 ,  G11B5/702

Abstract: The material has magnetisable layer(s) on a nonmagnetic carrier, and contains a binder mixt. of a polyurethane urea (meth)acrylate (1) and polyurethane elastomer, a high MW OH- gp. contg. polyurethane urea and/or a low MW OH- contg. polyurethane urea. (1) is made by reaction of a poly(meth)acrylate with up to 2 OH-end gps. and a MW 200-50000 and a mixt. aliphatic polyisocyanates with an NCO- functionality of 3-6 per mole. The polyisocyanates contain 0.1-10 wt.% of diisocyanates, 20-80 wt.% triisocyanates and 20-60 wt.% of isocyanates with a functionality of 4-10. There are 1.2-3 NCO gps. per OH gp., and the remaining NCO gps are converted to urea gps. with ammonia or with prim. or sec. amines.

公开(公告)号：DE4141838A1

公开(公告)日：1993-06-24

申请号：DE4141838

申请日：1991-12-18

Applicant: BASF MAGNETICS GMBH

Inventor： BOBRICH MICHAEL DR ,  LEHNER AUGUST ,  ROLLER HERMANN ,  SUETTINGER RUDOLF DR ,  KRESS RIA DR ,  SCHNEIDER NORBERT ,  LENZ WERNER DR ,  ENGELHARDT PETER ,  RUDOLF PETER DR ,  BRODT GREGOR DR

IPC: C08G18/10 ,  C08G18/62 ,  G11B5/702

Abstract: The material has magnetisable layer(s) on a nonmagnetic carrier, and contains a binder mixt. of a polyurethane urea (meth)acrylate (1) and polyurethane elastomer, a high MW OH- gp. contg. polyurethane urea and/or a low MW OH- contg. polyurethane urea. (1) is made by reaction of a poly(meth)acrylate with up to 2 OH-end gps. and a MW 200-50000 and a mixt. aliphatic polyisocyanates with an NCO- functionality of 3-6 per mole. The polyisocyanates contain 0.1-10 wt.% of diisocyanates, 20-80 wt.% triisocyanates and 20-60 wt.% of isocyanates with a functionality of 4-10. There are 1.2-3 NCO gps. per OH gp., and the remaining NCO gps are converted to urea gps. with ammonia or with prim. or sec. amines.

公开(公告)号：DE4446383A1

公开(公告)日：1995-07-20

申请号：DE4446383

申请日：1994-12-23

Applicant: BASF MAGNETICS GMBH

Inventor： BRODT GREGOR DR ,  LEHNER AUGUST ,  LINDNER ALFRED DR ,  GRAF HERMANN DR ,  BOBRICH MICHAEL DR ,  KRESS RIA DR ,  SCHNEIDER NORBERT ,  KOHL ALBERT ,  LOCH WERNER DR

IPC: C08G18/65 ,  C08F2/38 ,  C08F8/30 ,  C08F8/32 ,  C08G18/10 ,  C08G18/62 ,  C08G18/78 ,  C09D5/23 ,  C09D7/45 ,  C09D17/00 ,  C09D175/04 ,  C09K23/00 ,  C09K23/52 ,  G11B5/70 ,  G11B5/702 ,  C08G18/30 ,  C08L75/00 ,  B01F17/52 ,  C09D175/00

Abstract: Novel polymer compsns. (I), for use as dispersant resins, are obtd. by reacting a hydroxylated polymer (II) with a polyfunctional isocyanate (III). The amt. of NCO gps. is 1.2-3.0 mol. per mol. of OH gps. of (II). Then the prod. (IV) is reacted with ammonia or a cpd. (V) having an isocyanate-reactive amino function. (II) is obtd. from 80-100 mol.% of a 1-25 C alkyl ester of an alpha , beta -unsatd. carboxylic acid, 0-20 mol.% of a comonomer, tetrahydrofuran hydroperoxide (THFHPO) as polymerisation initiator and opt. another polymerisation initiator and/or regulator, such that most of the chains of (II) are hydroxy-terminated. The process of prepn. of (I) is claimed, as well as (I) per se.

公开(公告)号：DE4445173A1

公开(公告)日：1995-07-13

申请号：DE4445173

申请日：1994-12-17

Applicant: BASF MAGNETICS GMBH

Inventor： BRODT GREGOR DR ,  WUENSCH THOMAS DR ,  LEHNER AUGUST ,  KOHL ALBERT

IPC: C08G18/12 ,  C08G18/65 ,  C09D5/23 ,  G11B5/702 ,  C09D175/00

Abstract: Curable binder component (I) with mol. wt. of 25000-150000, useful for pigmented coatings, is prepd. from a polyurethane (II) obtd. by reacting (a) 1 mole diol with a mol. wt. of 400-4000, (b) 0.1-10 mole 2-18 C (cyclo)aliphatic diol, (c) 0.01-10 mole 8-36 C aromatic diol, (d) 0.01-2 mole 3-18C triol and (e) 0.001-8 mole 3-40 C polyol contg. a tert. amino gp. with (f) a 6-34 C diisocyanate, using a molar ratio of NCO gps. in (f) to total OH gps. in (a-e) of (1.05-1.4):1. (I) is prepd. by reacting (II) with a cpd. (III) having OH gp(s). and also NCO-reactive amino gp(s). in such an amt. that the no. of reactive amino gps. in (III) corresponds to the no. of NCO gps. in (II). Also claimed are articles with a coating, esp. a coating contg. a magnetic pigment, and magnetic recording materials contg. (I); and the coating process.