GB1153453A - Production of Magnetic Recording Media. - Google Patents
Production of Magnetic Recording Media.Info
- Publication number
- GB1153453A GB1153453A GB4324766A GB4324766A GB1153453A GB 1153453 A GB1153453 A GB 1153453A GB 4324766 A GB4324766 A GB 4324766A GB 4324766 A GB4324766 A GB 4324766A GB 1153453 A GB1153453 A GB 1153453A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyamide
- aminoethanol
- pts
- sept
- propanol
- 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.)
- Expired
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
Abstract
1,153,453. Magnetic compositions. BADISCHE ANILIN- & SODA FABRIK A.G. 28 Sept., 1966 [29 Sept., 1965], No. 43247/66. Heading H1H. In the production of magnetic recording media by applying a suspension of ferromagnetic powder in a solution of a linear polyamide on to a backing, the applied layer contains 10-150% by weight (referred to the polyamide) of a soluble condensation product of an aliphatic monocarboxylic acid having 4-22 carbon atoms, and an aliphatic hydroxyamine having at least one primary or secondary amino group, a molecular wt. of below 500, and, e.g., 2-18 carbon atoms. The layer is then dried and heated above the softening point of the polyamide, e.g. at 50-110‹ C. Suitable acids are butyric, caproic, caprylic, capric, lauric, tridecanoic, palmitic, stearic, nonadecylic, sorbic, linoleic, oleic, and sperm or linseed oil fatty acid. Suitable hydroxyamines are 3-hydroxypropylamine, 2-aminoethanol, N - methyl - 2 - aminoethanol, N - hydroxyethyl - 2 - aminoethanol, 2 - aminobutanol, 2- amino - 2 - methyl - propanol, 3 - amino - 2 - hydroxy - propanol, diethanolamine monomethylether, N,N<SP>1</SP> - di - 2 - hydroxyethylethylenediamine, N,N<SP>1</SP> - di - 2 - hydroxyethylpropylenediamine. Equimolar amounts may be used. Suitable polyamide-forming materials, solvents, plasticizers, dispersing agents, and backings are listed. 400-650 pts. by wt. of powder, e.g. acicular γ-Fe 2 O 3 , Fe 3 O 4 , or Fe, may be used per 100 pts. polyamide.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1965B0083932 DE1285003B (en) | 1965-09-29 | 1965-09-29 | Process for the production of magnetogram carriers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1153453A true GB1153453A (en) | 1969-05-29 |
Family
ID=6982196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4324766A Expired GB1153453A (en) | 1965-09-29 | 1966-09-28 | Production of Magnetic Recording Media. |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE687383A (en) |
| DE (1) | DE1285003B (en) |
| GB (1) | GB1153453A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4091158A (en) * | 1975-04-11 | 1978-05-23 | Fuji Photo Film Co., Ltd. | Magnetic recording members |
-
1965
- 1965-09-29 DE DE1965B0083932 patent/DE1285003B/en not_active Ceased
-
1966
- 1966-09-26 BE BE687383D patent/BE687383A/xx unknown
- 1966-09-28 GB GB4324766A patent/GB1153453A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4091158A (en) * | 1975-04-11 | 1978-05-23 | Fuji Photo Film Co., Ltd. | Magnetic recording members |
Also Published As
| Publication number | Publication date |
|---|---|
| BE687383A (en) | 1967-03-28 |
| DE1285003B (en) | 1968-12-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 416 | Proceeding under section 16 patents act 1949 | ||
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |