公开(公告)号：GB2285985A

公开(公告)日：1995-08-02

申请号：GB9500467

申请日：1995-01-11

Applicant: BASF MAGNETICS GMBH

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

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 ,  C08G18/83

Abstract: Polymeric materials (I) are obtainable by reacting (1) a polymer (II) comprising a) from 80 to almost 100 mol% of a C1 - C25-allyl ester of an alpha , beta -unsaturated carboxylic acid, b) from 0 to 20 mol% of a further monomer, c) tetrahydrofuran hydroperoxide as polymerization initiator and, if required, d) a further polymerization initiator and/or regulator by means of which the majority of the polymer chains of the polymer (II) are terminated at one of their ends by a hydroxyl group, (2) with a polyfunctional isocyanate (III) to give a reaction product (IV), the amount of isocyanate groups being from 1.2 to 3.0 mol per mol of hydroxyl groups of (II), and (3) reacting (IV) with ammonia or with a compound (V) which has an amino function reactive towards isocyanates. The polymeric materials can be used as dispersing resins for pigment-containing coatings, in particular for the production of magnetic recording materials.

公开(公告)号：GB2285985B

公开(公告)日：1998-04-29

申请号：GB9500467

申请日：1995-01-11

Applicant: BASF MAGNETICS GMBH ,  EMTEC MAGNETICS GMBH

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

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 ,  C08G18/83

Abstract: Polymeric materials (I) are obtainable by reacting 1. a polymer II comprising a) from 80 to almost 100 mol % of a C1-C25-alkyl ester of an alpha , beta -unsaturated carboxylic acid, b) from 0 to 20 mol % of a further monomer, c) tetrahydrofuran hydroperoxide as polymerization initiator and, if required, d) a further polymerization initiator and/or regulator by means of which the majority of the polymer chains of the polymer II are terminated at one of their ends by a hydroxyl group, 2. with a polyfunctional isocyanate III to give a reaction product IV, the amount of isocyanate groups being from 1.2 to 3.0 mol per mol of hydroxyl groups of II, and 3. reacting IV with ammonia or with a compound V which has an amino function reactive toward isocyanates. The polymeric materials can be used as dispersing resins for pigment-containing coatings, in particular for the production of magnetic recording materials.