http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0848378-A1

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assignee http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3656f0fbf69dd4b48b32306803e0f258
classificationCPCAdditional http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-31609
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S428-90
classificationCPCInventive http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B5-7021
classificationIPCInventive http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-702
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09D5-23
filingDate 1997-11-22-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c3216c52dc2843b794b09b4a23cdbb72
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_edd7949df51119fafe5acd47ee45ef90
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f3c30833b71565c08f53c96e6e867e76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_94ad01abf430cc9eaea42f399cc1e3de
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bacdffdd81af8032ae9cb60642a46f3b
publicationDate 1998-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber EP-0848378-A1
titleOfInvention Magnetic recording medium
abstract a) 3 bis 35 Gew.-% eines Polymerisats VI erhältlich durch Umsetzung vonn 1) einem Polymerisat VII ausn a) 80 bis knapp 100 mol-% eines C 1 -C 25 -Alkylesters einer a,b-ungesättigtennCarbonsäure, b) 0 bis 20 mol-% eines oder mehrerer weiterer Monomerernund c) einem Starter und/oder Regler, durch welchen die Mehrzahl dernPolymerketten des Polymerisats VII an einem ihrer Enden durch einenHydroxylgruppe terminiert wird, 2) mit einem mehrwertigen nicht-aromatischen Isocyanat VIII zu einemnUmsetzungsprodukt IX, wobei die Menge der Isocyanatgruppen 1,2 bis 3,9nmol pro Mol der Hydroxylgruppen von VII beträgt, 3) Umsetzung von IX mitn a) einer gegenüber Isocyanaten reaktive Gruppen enthaltenden VerbindungnX zu einem Umsetzungsprodukt XI, wobei die Menge der reaktivennGruppen 2 bis 7 mol pro Mol der in IX noch vorhandenen freiennIsocyanat-Gruppen beträgt nund nUmsetzung von XI mit einer Verbindung XII zum Polymerisat VI, dienmit den noch freien reaktiven Gruppen in XI reagiert und durch welchenionische oder ionogene Gruppen in XI eingeführt werden, noder b) einer gegenüber Isocyanaten reaktive Gruppen enthaltenden VerbindungnXIII, durch die ionische oder ionogene Gruppen in IX eingeführtnwerden, zum Polymerisat VI nund b) 5 bis 97 Gew.-% eines basische Gruppen enthaltenden Polymeren XIV mit einemnMolekulargewicht von 30000 bis 2000000, erhältlich durch Umsetzung vonn 1) einem polymeren Diol XV mit einem Molekulargewicht (Zahlenmittel) vonn400 bis 10000, mit 2) 0,3 bis 1 Mol pro Mol des Diols XV eines Diols XVI mit 2 bis 18nKohlenstoffatomen und 3) 0,01 bis 1 Mol pro Mol des Diols XV eines mehrwertigen Alkohols XVII mitnmindestens drei OH-Gruppen und 3 bis 25 Kohlenstoffatomen, 4) 1,3 bis 13 Mol pro Mol des Diols XV eines Diisocyanats XVIII mit 6 bis 30nKohlenstoffatomen und 5) 0,09 bis 2 Mol pro Mol des Diols XV eines Aminoalkohols XIX mit 2 bis 16nKohlenstoffatomen, nwobei das Verhältnis der Summe der OH-Gruppen der Verbindungen XV, XVI und XVIInzu den NCO-Gruppen der Verbindung XVIII zu den Aminogruppen der Verbindung XIXn1 : 1,03 bis 1,3 : 0,03 bis 0,3 beträgt, nenthält, wobei die Summe der Gewichtsanteile der Polymerisate VI und VII an demnSystem V 40 bis 100 Gew.-% beträgt.Magnetic recording medium I, containing a non-magnetic carrier material II and a magnetizable layer III, the magnetizable layer III containing ferromagnetic pigments IV and a system of polymeric compositions V, the system of polymeric compositions V a) 3 to 35 wt .-% of a polymer VI obtainable by reacting 1) a polymer VII a) 80 to almost 100 mol% of a C 1 -C 25 -alkyl ester of an a, b-unsaturated carboxylic acid, b) 0 to 20 mol% of one or more further monomers and c) a starter and / or regulator by which the majority of the polymer chains of polymer VII is terminated at one of their ends by a hydroxyl group, 2) with a polyvalent non-aromatic isocyanate VIII to give a reaction product IX, the amount of the isocyanate groups being 1.2 to 3.9 mol per mole of the hydroxyl groups of VII, 3) Implementation of IX with a) a compound X containing isocyanate-reactive groups to give a reaction product XI, the amount of the reactive groups being 2 to 7 mol per mol of the free isocyanate groups still present in IX and Conversion of XI with a compound XII to polymer VI, which reacts with the still free reactive groups in XI and through which ionic or ionogenic groups are introduced into XI, or b) a compound XIII containing groups reactive toward isocyanates, through which ionic or ionogenic groups are introduced into IX, to give polymer VI and b) 5 to 97% by weight of a polymer XIV containing basic groups and having a molecular weight of 30,000 to 2,000,000, obtainable by reacting 1) a polymeric diol XV with a molecular weight (number average) of 400 to 10,000, with 2) 0.3 to 1 mole per mole of diol XV of a diol XVI with 2 to 18 carbon atoms and 3) 0.01 to 1 mole per mole of the diol XV of a polyhydric alcohol XVII with at least three OH groups and 3 to 25 carbon atoms, 4) 1.3 to 13 moles per mole of diol XV of a diisocyanate XVIII with 6 to 30 carbon atoms and 5) 0.09 to 2 moles per mole of diol XV of an amino alcohol XIX having 2 to 16 carbon atoms, wherein the ratio of the sum of the OH groups of the compounds XV, XVI and XVII to the NCO groups of the compound XVIII to the amino groups of the compound XIX is 1: 1.03 to 1.3: 0.03 to 0.3, contains, the sum of the proportions by weight of the polymers VI and VII in the system V being 40 to 100% by weight.
priorityDate 1996-12-12-04:00^^<http://www.w3.org/2001/XMLSchema#date>
type http://data.epo.org/linked-data/def/patent/Publication

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