SU932546A1

SU932546A1 - Magnetic record carrier sensitive layer

Info

Publication number: SU932546A1
Application number: SU803001998A
Authority: SU
Inventors: Виктор Николаевич Рупышев; Василий Антонович Боголюбский; Самуил Аркадьевич Борщевский; Нинель Абрамовна Каганова; Алексей Иванович Дунаев
Priority date: 1980-11-10
Filing date: 1980-11-10
Publication date: 1982-05-30

Description

(5) РАБОЧИЙ СЛОЙ НОСИТЕЛЯ МАГНИТНОЙ ЗАПИСИ(5) WORKING LAYER OF THE MEDIA MAGNET RECORDING

1one

Изобретение относитс к области магнитной записи, а именно к носител м магнитной записи.The invention relates to the field of magnetic recording, in particular to magnetic recording media.

Известен рабочий слой носител магнитной записи, срсто щий из магнитных частиц двуокиси хрома, равномерно распределенных в полимерном св зующем веществе fl и t 2l.A working magnetic carrier recording layer is known, made up of magnetic particles of chromium dioxide evenly distributed in the polymer binder material fl and t 2l.

Известный рабочий слой имеет относительно высокую эластичность, однако не позвол ет обеспечить достаточно высокую плотность записи.The known working layer has a relatively high elasticity, but does not allow for a sufficiently high recording density.

Известен рабочий слой носител магнитной записи, состо щий из Mai- нитных частиц двуокиси хрома, рав номерно распределенных в сополимере винилиденхлорида и акрилонитрила, в диалкилполигликолевом эфире ортофосфорной кислоты или соевом лецитине , в бутиловом эфире стеариновой кислоты, в гексаметоксиметилмеламине и в У1-толуолсульфокислоге, Рабочий слой позвол ет обеспечитьKnown working layer magnetic recording medium, consisting of Mai- netic chromium dioxide particles, uniformly distributed in the copolymer of vinylidene chloride and acrylonitrile, in dialkilpoliglikolevom ether orthophosphoric acid or soybean lecithin, a butyl ether of stearic acid and hexamethoxymethylmelamine in the U1-toluolsulfokisloge, Work layer allows to provide

относительно высокую плотность записи З.relatively high recording density

Недостаток известного рабочего сло состоит в том что он не обеспечивает высокую износоустойчивость носител MarHMtHofl записи.A disadvantage of the known working layer is that it does not provide high durability of the MarHMtHofl recording medium.

Цель изобретени - повышение износоустойчивости носител магнитной записи.The purpose of the invention is to increase the durability of the magnetic recording medium.

Поставленна цель достигаетс The goal is achieved

Claims

10 by the fact that the working layer of the magnetic recording carrier contains a thermoplastic polyetherurethane with a hydroxyl number, and a copolymer of vinylidenechloride / acid and acrylonitrile is made with a content of 15-25 wt.% Nit-. aryl groups in the following ratio, wt%: magnetic particles of chromium dioxide 70.0-75.0; brtofosK dialkyl polyglycol ether formal or soy lecithin 2.5-3.5; stearic acid butyl ester 2.5-3.5; Compiler of vinylidenechloride and acrylonitrile, 03 10.0; thermoplastic polyetherurethane with a hydroxyl number k-W 8.0-1L, 0; hexamethoxymethylmelamine and -toluenesulfonic acid the rest. The proposed working layer is a thin film placed on the surface of a non-magnetic base of a magnetic recording medium and consists of magnetic particles of chromium dioxide uniformly distributed in a copolymer of vinylidene chloride and acrylonitrile in dialkylpolyglycolic ether of orthophosphoric acid, in the direction of the surface, in the shape of the surface. with a hydroxyl number of -10, in hexamethoxymethylmelamine and in I-toluenesulfonic acid. The working layer may contain, by weight: magnetic particles of chromium dioxide 70.0; copolymer of vinylidenechloride and acrylonitrile, Q dialkyl polyglycol ether orthophosphoric acid 2.5; butyl ester of stearic acid 2.5; a thermoplastic polyetherurethane with a hydroxyl number of -10 th, 0; hexamethoxymethyl (1 on 2,6 and I-toluenesulfonic acid 4,4. In this case, the copolymer of vinylidenechloride and acrylonitrile is made up of 15 weight nitrile groups. In addition, the working layer may contain soy lecithin instead of a dialkyl polyglycol ether of orthophosphoric acid). The layer in the process of moving the magnetic recording cell is in contact with the working surface of the magnetic head, while ensuring a high accuracy of matching its residual magnetization to the recorded signal during recording and you Juice Accuracy of Restoration of Recording Result in the Process of Reproduction. The use of the proposed working layer makes it possible to significantly increase the durability of the magnetic recording medium. Formula of the Invention The working layer of the magnetic recording carrier consisting of magnetic particles of chromium dioxide evenly distributed in the copolymer of vinylidene chloride and acrylonitrile, dialkylpolyglycolic ester of phosphoric acid or soy lecithin, in butyl ester of stearic acid, in hexamethoxymethylmelamine and in P-toluenesulfonic acid, characterized in that, in order to increase the durability of the magnetic recording carrier, the working layer contains a thermoplastic polyetherurethane with a hydroxyl number of 4-10, and a copolymer of vinylidene chloride and acrylonitrile is made with a content of 1525 wt. nitrile groups in the following ratio of components, weight: Magnetic particles of chromium dioxide 70.0-75.0 Copolymer of vinylidene chloride and acrylonitrile 4.0-10.0 Dialkylpolyglycol orthophosphoric acid ester or. soy lecithin2, 5-3 ,, 5 Butyl ester of stearic acid2, 5-3.5 Thermoplastic polyetherurethane with a hydroxyl number of 4-10 8.0-14.0 Hexamethoxymethylmelamine. 2.6-3.6 And-Toluenesulfo, Acid Others Sources of information taken into account during the examination 1. Japan Patent No. 47-22065, cl. 102 E software. 11, 06.21.72.

2. Japanese Patent No. 47-22073, cl. 102 E 110.11, 21.06.72.

3. Japanese patent No. 50-4121, cl. 102 E 110.11, 1.5 ..02.75 (prototype).