JPS6050232B2 - Antistatic agent composition for reproduction recording materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel antistatic agent composition for reproduction recording materials comprising a solvent solution of a fluorinated cationic surfactant.

Various types of antistatic agents have been known for use in reproduction recording materials such as records, video discs, and magnetic tapes, and hydrocarbon-based cationic surfactants are generally employed. The antistatic agent is commercially available as an organic solvent or water solution. Usually, antistatic treatment is performed by applying such a solution to the surface of a record or the like and drying it. As a result of various studies and studies on antistatic agents for records, etc., the present inventor has discovered the new finding that fluorinated cationic surfactants containing polyfluoroalkyl groups can exhibit various excellent advantages. I ended up getting it.

In other words, fluorinated surfactants not only have significantly superior antistatic performance compared to hydrocarbon surfactants, but also
It was also discovered that it is significantly superior in terms of durability and low friction properties. For example, when applied to the surface of a record, fluorinated ticationic surfactants have good adsorption and excellent penetration into minute grooves, making them more durable than hydrocarbon surfactants. is in very good condition. Furthermore, the sound quality is improved due to the effect of imparting low friction properties. Therefore, it has been newly discovered that a solution prepared by dissolving a small amount of a fluorinated cationic surfactant in a solvent such as trichlorotrifluoromethane or isopropanol J can exhibit the various effects described above well. That is, the present invention provides a method in which a fluorinated cationic surfactant containing a polyfluoroalkyl group is dissolved in a solvent having a boiling point of 20 to 100°C that dissolves the fluorinated cationic surfactant and is active on the surface of a reproduced recording material. The present invention provides a new antistatic agent composition for reproduction recording materials which is dissolved at a concentration of 1% by weight or less. In the present invention, it is important to use a fluorinated ticationic surfactant, and nonionic or anionic surfactants are insufficient in imparting antistatic properties.

Of course, hydrocarbon surfactants have even more insufficient performance than fluorinated surfactants, and have difficulties in providing durability and low friction properties. For example, by applying the composition of the present invention to the surface of a record and drying it, the surface electrical resistance of an untreated record becomes 2.9 x 1015Ω.
However, it is possible to reduce the resistance to 9.5×10 11 Ω or less. In addition, when using a fluorinated anionic surfactant, a fluorinated nonionic surfactant, or a hydrocarbon-based cationic surfactant, it is difficult to reduce the surface electrical resistance to the above level, and it is necessary to apply a large amount. Even if this could be achieved, it would have a significant impact on sound quality, such as the generation of noise. Furthermore, records treated with the composition of the present invention retain their effects even after repeated sound reproduction, and are free from problems such as noise and have excellent sound quality. In the present invention, the polyfluoroalkyl group-containing fluorinated cationic surfactant is not particularly limited, and a wide range of conventionally known and well-known surfactants can be employed.

The number of carbon atoms in the polyfluoroalkyl group is preferably 1 to 5.
Usually, it is preferably a perfluoroalkyl group, and the number of carbon atoms is preferably 6 to 18. Of course, polyfluoroalkyl groups may be linear or branched, and may partially contain hydrogen atoms, chlorine atoms, or ether bonds! It's okay. A polyfluoroalkyl group having at least a perfluoroalkyl group at the end can be suitably selected. The cationic group may be exemplified by a quaternary ammonium group. A suitable example of a fluorinated cationic surfactant is a hum salt.

In the above formula, R is a polyfluoroalkyl group having 4 to 5 carbon atoms, particularly a perfluoroalkyl group having 6 to 18 carbon atoms, and Q is -CON(Rso or -SO2N(Rso); , R1 is a hydrogen atom or a lower alkyl group having 1 to 4 carbon atoms, and R is a divalent alkylene group having 1 to 1 C@.In addition, R2, R3, and R4 are a hydrogen atom, an alkyl group, or a hydroxyalkyl group. group, or -ACOOM,
A is a divalent alkylene group having 1 to 3 carbon atoms, and M is an alkali metal such as sodium or potassium or -NH4. X is a halogen atom, -HSO4, -CH3SO4, -
H2PO4, -CH3COO or -CH2ClCOO. In addition, R may be linear or branched, and R2,
One of R3 and R4, R1 and R may form a ring.
In addition, in the present invention, US Pat. No. 4,062,849
Perfluoropolycationic interfaces such as those described in US Pat. Fluorinated cationic surfactants such as surfactants can also be used. Specifically, fluorinated cationic surfactants such as the hydrochloride of the following can be exemplified.

In the present invention, the above-mentioned fluorinated cationic surfactant is dissolved in a solvent at a low concentration.

The solvent is a fluorinated cationic surfactant. It is important that the material is capable of dissolving the agent and is inert to the surface of a reproducing recording material such as a record disc. The solvent is selected from those having a boiling point of 20 to 100'C, and volatile organic solvents having a boiling point of about 40 to 60C are particularly suitable. If the boiling point is too high, there will be difficulties during coating and drying, and if the boiling point is too low, there will be disadvantages in terms of the product as a solution. Various examples of such solvents can be used, but trichlorotrifluoroethane and lower alcohols are usually preferred. In particular, trichlorotrifluoroethane is advantageous because it is nonflammable. In the present invention, lower alcohols such as ethanol and isopropanol may be used alone, but it is usually preferable to use them as a mixture with trichlorotrifluoroethane. Then,
A fluorinated cationic surfactant is dissolved in the solvent at a concentration of 1% by weight or less.

If the concentration is too high, the uniform application of a thin layer onto the surface of the reproducing recording material will be impaired, and it will also cause noise in records and the like. Preferably, a concentration of about 0.01 to 0.5% by weight is employed. Of course, the above concentration is the one used when applying the solution of the present invention, and it may be used at a high concentration during product storage or transportation, and then diluted during use.
Further, the solution of the present invention may be used as is, or may be used as an aerosol product by filling it together with a suitable propellant in a pressurized container. The antistatic agent composition of the present invention can be widely applied to recycled memory materials such as vinyl records, video disks, magnetic disks and tapes, photographic films, and projection films. It is particularly suitable for use in record discs.

Next, examples of the present invention will be described in more detail, but it goes without saying that the present invention is not limited by such explanations. Kamiko people. -, ,,,,,,,, Example 2 Example 3 Example 4 A thin and uniform layer of fluorine is deposited on the record surface by spraying a solution with the above composition onto the record surface and polishing it with a soft cloth. It is possible to form a surface on which a cationic surfactant is adsorbed.

In order to evaluate the antistatic performance, the surface of a vinyl acetate/vinyl chloride 10/90 (weight ratio) copolymer was treated,
The results of measuring the surface electrical resistance are shown in Table 1 below. still,
Table 1 also shows the untreated case (Comparative Example 1). Next, in order to investigate the effect on sound quality, the surface of the record was treated and the distortion rate of sound at various wavelengths was measured, and the following results were obtained.

From this result, it is clear that the sound distortion rate is lower and the sound quality is improved when the processed sound is compared to the unprocessed sound.

Claims (1)

[Scope of Claims] 1. A fluorinated cationic surfactant containing a polyfluoroalkyl group is dissolved in a solvent having a boiling point of 20 to 100°C that dissolves the fluorinated cationic surfactant and is inert to the reproduction recording surface. An antistatic agent composition for reproduction recording materials dissolved at a concentration of 1% by weight or less. 2. The composition according to claim 1, wherein the fluorinated cationic surfactant contains a perfluoroalkyl group having 4 to 20 carbon atoms. 3. The composition according to claim 1, wherein the solvent is a volatile organic solvent having a boiling point of 20 to 100°C. 4. The composition according to claim 3, wherein the solvent is trichlorotrifluoroethane. 5. The composition according to claim 3, wherein the solvent is a lower alcohol. 6. The composition according to claim 3, wherein the solvent is a mixed solvent of trichlorotrifluoroethane and lower alcohol.