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1. WO1996004648 - BINDER SYSTEM FOR MAGNETIC MEDIUM

Publication Number WO/1996/004648
Publication Date 15.02.1996
International Application No. PCT/US1995/008405
International Filing Date 05.07.1995
Chapter 2 Demand Filed 27.02.1996
IPC
G11B 5/702 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
68comprising one or more layers of magnetisable particles homogeneously mixed with a bonding agent
70on a base layer
702characterised by the bonding agent
CPC
C08G 18/12
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
18Polymeric products of isocyanates or isothiocyanates
06with compounds having active hydrogen
08Processes
10Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
12using two or more compounds having active hydrogen in the first polymerisation step
C08G 18/3889
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
18Polymeric products of isocyanates or isothiocyanates
06with compounds having active hydrogen
28characterised by the compounds used containing active hydrogen
30Low-molecular-weight compounds
38having heteroatoms other than oxygen
3878having phosphorus
3889having nitrogen in addition to phosphorus
C08G 18/44
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
18Polymeric products of isocyanates or isothiocyanates
06with compounds having active hydrogen
28characterised by the compounds used containing active hydrogen
40High-molecular-weight compounds
42Polycondensates having carboxylic or carbonic ester groups in the main chain
44Polycarbonates
C08G 18/6229
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
18Polymeric products of isocyanates or isothiocyanates
06with compounds having active hydrogen
28characterised by the compounds used containing active hydrogen
40High-molecular-weight compounds
62Polymers of compounds having carbon-to-carbon double bonds
6216Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
622Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
6225Polymers of esters of acrylic or methacrylic acid
6229Polymers of hydroxy groups containing esters of acrylic or methacrylic acid with aliphatic polyalcohols
C08G 18/664
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
18Polymeric products of isocyanates or isothiocyanates
06with compounds having active hydrogen
28characterised by the compounds used containing active hydrogen
65Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
66Compounds of groups C08G18/42, C08G18/48, or C08G18/52
6633Compounds of group C08G18/42
6637with compounds of group C08G18/32 or polyamines of C08G18/38
664with compounds of group C08G18/3203
G11B 5/7022
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
68comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
70on a base layer
702characterised by the bonding agent
7021containing a polyurethane or a polyisocyanate
7022containing mixtures of polyurethanes or polyisocyanates with other polymers
Applicants
  • MINNESOTA MINING AND MANUFACTURING COMPANY [US/US]; 3M Center P.O. Box 33427 Saint Paul, MN 55133-3427, US
Inventors
  • ERKKILA, Ruth, M.; US
  • CARLSON, James, G.; US
  • EVANS, Christopher, M.; US
  • GRECZYNA, James, A.; US
  • KUMAR, Ramesh, C.; US
  • NORMAN, Colin, F.; US
  • ROTTO, Nelson, T.; US
Agents
  • KAGAN, David, B. ; Minnesota Mining and Manufacturing Company Office of Intellectual Property Counsel P.O. Box 33427 Saint Paul, MN 55133-3427, US
  • VOSSIUS & PARTNER (no 31); P.O. Box 86 07 67 D-81634 Munich, DE
Priority Data
08/282,95829.07.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) BINDER SYSTEM FOR MAGNETIC MEDIUM
(FR) LIANT POUR SUPPORT MAGNETIQUE
Abstract
(EN)
A polymeric binder system useful for a magnetic recording medium, the polymeric binder system and comprising a hard resin component comprising a nonhalogenated vinyl copolymer and a soft resin component comprising a polyurethane having a phosphonate diester group. The binder system is useful for preparing the magnetic layer and/or backside coating of magnetic recording media, in order to provide media that demonstrate an improved combination of such as modulus, Tg, and smoothness.
(FR)
Système liant polymère pouvant être utilisé pour un support d'enregistrement magnétique. Ce système comporte un composant de résine dure comprenant un copolymère de vinyl non halogéné et un composant de résine douce comprenant un polyuréthane ayant un groupe diester de phosphonate. Le liant permet de préparer la couche magnétique et/ou le revêtement arrière de supports d'enregistrement magnétiques et de fournir ainsi des supports dont les performances en matière d'élongation maximale, de température de transformation et de régularité sont améliorées.
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