JPS5760531A - Binder and magnetic recording material - Google Patents
Binder and magnetic recording materialInfo
- Publication number
- JPS5760531A JPS5760531A JP13469580A JP13469580A JPS5760531A JP S5760531 A JPS5760531 A JP S5760531A JP 13469580 A JP13469580 A JP 13469580A JP 13469580 A JP13469580 A JP 13469580A JP S5760531 A JPS5760531 A JP S5760531A
- Authority
- JP
- Japan
- Prior art keywords
- polyol
- equivalent
- low molecular
- binder
- recording material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/702—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent
- G11B5/7021—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent containing a polyurethane or a polyisocyanate
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To increase the dispersing property and wear resistance of magnetic powder, by using a polyurethane resin consisting of a mixture between a specified macromolecular polyol and low molecular polyol including >=3 functional groups low molecular polyol, and of an aromatic polyisocyanate as a binder. CONSTITUTION:A polyurethane resin (C) can be obtd. by reacting a mixed polyol A including a macromolecular polyol (A1) 150-2,000 equivalent having 150- 2,000 equivalent of polytetramethylene glycol (a1) or including the polyol (a1) plus >=50wt% of polycaprolactone polyol, and low molecular polyol (A2) including >=3 functional groups of low molecular polyol (a2), with an aromatic polyisocyanate (B). In the polyol (a2), 1-40 equivalent % of the a2 is included in the polyol A as methylolpropane and the A2 is included in the A in 20-29 equivalent %. The NCO/OH equivalent ratio of the B to A is taken as 0.6-1.5. This resin C is used for a binder and the magnetic recording material excellent in durability can be obtd.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13469580A JPS5760531A (en) | 1980-09-26 | 1980-09-26 | Binder and magnetic recording material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13469580A JPS5760531A (en) | 1980-09-26 | 1980-09-26 | Binder and magnetic recording material |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5760531A true JPS5760531A (en) | 1982-04-12 |
Family
ID=15134425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13469580A Pending JPS5760531A (en) | 1980-09-26 | 1980-09-26 | Binder and magnetic recording material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5760531A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61104325A (en) * | 1984-10-22 | 1986-05-22 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
EP0714696A3 (en) * | 1994-12-01 | 1997-05-07 | Freudenberg Carl Fa | Adsorption filter for air and process for preparing it |
-
1980
- 1980-09-26 JP JP13469580A patent/JPS5760531A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61104325A (en) * | 1984-10-22 | 1986-05-22 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
JPH0568006B2 (en) * | 1984-10-22 | 1993-09-28 | Konishiroku Photo Ind | |
EP0714696A3 (en) * | 1994-12-01 | 1997-05-07 | Freudenberg Carl Fa | Adsorption filter for air and process for preparing it |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS56819A (en) | Thermosetting polyurethane resin and coating agent | |
JPS57150129A (en) | Magnetic recording medium | |
ES8507596A1 (en) | Adhesive fusible. | |
SE8101599L (en) | COMPOSITION MASS, PROCEDURES FOR PREPARING IT AND USING THEREOF | |
ES2001865A6 (en) | Curable composition having high tack and green strength. | |
EP0367667A3 (en) | A new polyurethane resin containing at least one phosphoric acid group and its use in a magnetic coating formulation and a magnetic recording medium | |
JPS5760531A (en) | Binder and magnetic recording material | |
JPS5792422A (en) | Magnetic recording medium | |
GB1242780A (en) | Polyurethanes | |
JPS5760532A (en) | Binder and magnetic recording material | |
JPS5760529A (en) | Binder and magnetic recording material | |
GB1449578A (en) | Curable polyurethane compositions and cured polyurethane elastomers | |
GB1200632A (en) | Polyurethanes | |
JPS57101017A (en) | Preparation of elastic polyurethane | |
JPS5760530A (en) | Binder and magnetic recording material | |
AU606205B2 (en) | Modified polyols and their use in the manufacture of polymer polyols | |
JPS5436336A (en) | Coating composition | |
JPS56155270A (en) | Adhesive for synthetic resin | |
JPS56119929A (en) | Magnetic recording medium | |
JPS56117329A (en) | Magnetic recording medium | |
JPS57178251A (en) | Manufacture of toner | |
JPS56119920A (en) | Magnetic recording medium | |
JPS5767663A (en) | Urethane resin coating material | |
GB1436591A (en) | Curing of polyurethane prepolymers | |
JPS56117333A (en) | Magnetic recording medium |