http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-4024159-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_03d0f52bb4069f8a19d70dcfb697c67a |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S428-90 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-257 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-25 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B5-712 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B5-7356 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B5-7085 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B5-714 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B5-71 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09D5-23 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09D127-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09D127-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-735 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-73 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-714 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-712 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-71 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-708 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-706 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09D175-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09D175-00 |
| filingDate | 1990-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_818b48fb5710a46361973556e2fa4bdd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b2c82da13249e144bc82e48e40ccd906 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0c9a832c622d0b9d444e30c3c9b9f77b |
| publicationDate | 1991-02-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-4024159-A1 |
| titleOfInvention | MAGNETIC RECORDING MEDIUM |
| abstract | Magnetic recording medium has a nonmagnetic substrate with a back coat contg. C black (I) and a binder and a magnetic recording coat contg. a ferromagnetic powder (II) and a binder. (II) is oriented so that the ratio of the no. of diffraction points N(220)/N(113), measured in the surface region of the magnetic coat by high energy electron diffraction, is max. 1.65 and the squareness ratio Br/Bm of the magnetic coat at 25 deg.C is 0.30-0.860. - Pref. the magnetic coat has a surface gloss of 150-200 and the N(220)/N(113) ratio is at least 1:1. (II) consists of acicular ferromagnetic crystalline particles, pref. of gamma-Fe2O3, Fe3O4 or FeOx (x=1.33-1.50), opt. doped with Co, pref. with a particle size of 0.005-1 micron, specific surface area of 1-70 m2/g and water content of 0.2-2.0 (wt.)% Fe oxide(s) doped with Co, pref. Fe(II) oxide contg. 1-5% Fe (III) is pref. The acicularity ratio is 3/1 to 20/1 and the length of the long axis 0.05-0.5 microns. The coat contains 5-30% binder and pref. also 0.1-20% (I) w.r.t. (II) and 5-40% polyisocyanate and 0.01-20% abrasive powder(s) with a Mohs hardness of at least 6 and particle size of 0.005-5 microns w.r.t. the binder. It may also contain a lubricant. The binder is a thermoplastic, thermosetting or reactive resin contg. functional acid, alkyl ester, amino-acid, amphoteric, amino, imino, imido, amido, epoxy, OH, alkoxy, thio, halogen, silyl and/or siloxane gp(s). in an amt. of 1 x 10 power -6 to 1 x 10 power -2 equiv./g resin. The back coat contains 30-300% binder w.r.t. (I). |
| priorityDate | 1989-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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