SU723664A1 - Magnetic record carrier working layer - Google Patents

Description

The invention relates to magnetic recording, and in particular to magnetic recording media.

A known working layer of a magnetic recording medium, made in the form of a film consisting only of magnetic material [1]. Known working layer has high magnetic properties.

The disadvantage of this working layer is its low elasticity, leading to disruption of contact with the magnetic head during recording and playback.

Closest to the proposed working layer of a magnetic recording medium containing magnetic particles of gamma-iron oxide uniformly distributed in a copolymer of vinyl chloride, vinyl acetate and vinyl alcohol, an epoxy resin with a molecular weight of up to 5000, a polyurethane elastomer, dipkyl polyglycol ether of phosphoric acid, acetylene soot, hexamethoximet butyl stearate and curing catalyst [2]. This working layer has a relatively high elasticity.

The disadvantage of such a working layer is its low strength.

The purpose of the invention is to increase the strength of the working layer of the magnetic recording medium.

This is achieved due to the fact that the working layer of the magnetic recording medium contains as a curing catalyst a complex of boron trifluoride in the following ratio of components, wt.%:

Gamma magnetic particles fifteen iron oxide A copolymer of vinyl chloride, vinyl acetate and vinyl 67D5 - 72.21 alcohol Epoxy resin with mol- 834 - 13,42 gross weight up to 5000 1.04 - 1.94 twenty Polyurethane Elastomer Dialkyl polyglycol 4.77 - 8.90 phosphoric ester 139 - 1.49 Acetylene black Hexamethoxymethyl 4.47 - 6.95 melamine 1.19 - 2.50

1,04

1.80

037 - 0.83 is made in tapes intended for recording as an ayotak and digital information.

Butyl stearate

Boron trifluoride complex

The proposed working layer is a film strengthened on the basis of a magnetic recording medium and consisting of magnetic 'gamma-iron oxide particles uniformly distributed in a copolymer of vinyl chloride, vinyl acetate and vinyl alcohol, an epoxy resin with a molecular weight of up to 5000, polyurethane rubber, dialkyl polyglycol ether of phosphoric acid, acetylene soot, hexamethoxymethylmelamine. butyl stearate and curing catalyst. Moreover, as a curing catalyst, the proposed working layer contains a complex of boron trifluoride. The proposed working layer while harvesting, wt.%:

Magnetic particles gamma may contain-

iron oxide 72.21 Vinyl chloride copolymer, vinyl acetate and vinyl alcohol 13,42 Epoxy resin with molecule up to 5000 1,04 Polyurethane Elastomer 4.77 Dialkyl polyglycol ether phosphoric acid 1.49 Acetylene black 4.47 Hexamethoxymethylmelamine 1.19 Butyl stearate 1,04 Boron trifluoride complex 037

The proposed working layer during the recording process is moved relative to the magnetic head, which magnetizes it in accordance with the recorded signal.

The use of the invention allows to significantly increase the strength of the working layer of the magnetic recording medium. The invention can be used in magnetic

Claims (2)

This invention relates to magnetic recording, in particular to magnetic recording media. A known working layer of a magnetic recording medium, made in the form of a film, consisting only of magnetic material 1. The known working layer has high magnetic properties. The disadvantage of such a working layer lies in its low elasticity, which leads to the disturbance of contact with the magnetic head during the process of reproduction and reproduction. Closest to the proposed working layer of a magnetic recording supernatant, containing magnetic particles of gamma-iron oxide, equally distributed in a copolymer of vinyl chloride, virsh acetate and vinyl alcohol, zpoxy resin with a molecular weight of up to 5000, polyurethane elastomer, dialkyl polyglycolic ether, phosphoric acid, and a mixture of up to 5000 polystyrene elastomer, dialkylpolyglycolic ether, and a mixture of polypropylene elastomer. hexamethoxymethyl melamine butyl stearate and curing catalyst 2. This working layer has relatively high elasticity. There is a lack of a similar working layer of low strength. The purpose of the invention is to increase the strength of this layer of the magnetic recording carrier. This is achieved due to the fact that the working media, magnetic recording, contains a boron fluoride complex as a catalyst, with the following component ratio, wt%: Magnetic particles gamma6735 - 72,21 iron oxide Copolymer of vinyl chloride, vinyl acetate and vinyl 834 - 13,42 alcohol Epoxy resin with molecular weight up to 5,000 Polyurethane elastomer 4.77 Dialkylpolyglycolic ester of phosphoric acid Acetylene black 4.47 Hexamethoxymethyl1,19 Melamine Butl stearate1.04-1.80 Boron trifluoride complex037 - 0.83 Offered working layer It is made in the form of a film reinforced on the basis of a magnetic recording medium and consisting of magnetic particles of gamma iron oxide uniformly distributed in a copolymer of vinyl chloride, vinyl acetate and vinyl alcohol, zpoxy resin with a molecular weight of up to 5000, polyurethane rubber, dialkyl polyglycol ether, phosphorus acids, acetylene black, hexamet oxymethylmelamine. butyl stearate and curing catalyst. Moreover, as a curing catalyst, the proposed working layer contains boron trifluoride complex. The proposed working layer at this time may contain, in wt.%: Magnetic particles of gamma iron oxide 72.21 Copolymer of vnnchloride, vinyl acetate and vinyl alcohol 13.42 Epoxy resin with molecules ry1m weighing up to 50001.04 Polyurethane elastomer 4.77 Dialkylpolyglycolic ether of phosphoric acid, I4 ≤4.44 carbon black 4.47 Hexamethoxymethylmelamine1.19 Butyl stearate 1.04 Boron trifluoride complex OL7 The proposed working layer is moved relative to the magnetic head during the recording process, which magnetizes it in accordance with the recorded signal. The use of the invention allows to significantly increase the strength of the working layer of the magnetic recording carrier. The invention can be used in magnetic tapes designed to record both anapOGOBO and digital information. The claims working layer magnetic record carrier, consisting of magnetic particles of gamma iron oxide is uniformly distributed in the copolymer of vinyl chloride, vinilaietata vinyl alcohol, epoxy powder resin having a molecular weight up to 5,000, polyurethanes ohm elastomer dialkilpolshlikolevom ether phosphoric acid, acetylene soot, Hexamstoxylmelamine, butyl stearate and kata / curing agent, characterized in that, in order to increase the strength of the working layer, it contains a trift complex as a curing catalyst. boron in the following ratio of components, wt.s.: Magnetic particles gamma iron oxide 6735 - 72,21 Copolymer of vinyl chloride, vinyl acetate and vinyl 834 - 13,42 Epoxy resin with a molecular weight, 04 - 1,94 cw weight up to 5000 Polyurethane elastomer 4.77 - 8.90 Dialkylpolyglycolic 139 - 1.49 Phosphoric ester Acetylene black 4.47 - 6.95 Hexamethoxymethylmelamine 1.19 - 2.50 Butyl stearate, 04 - 1.80 Trifluoride complex. 037 -0.83 Sources of information taken into account during the examination 1. Mazo Ya.A. Magnitna ribbon. M., Energie, 1968, p.10. 2. Authors certificate of USSR N 565323 cl. G 11 B 5/62, 1976 (prototype).