JPS6118960B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a cleaning agent for record discs, and more specifically, by forming a film on the record surface and peeling it off, this cleans dirt such as dirt and dust on the record surface and its sound grooves. This invention relates to a cleaning agent for record discs that is used to adhere to the coating and remove it together with the coating. Conventionally, a water-based cleaning agent such as polyvinyl alcohol is used as a cleaning agent for record discs, which forms a film on the surface of the record and removes dirt and dust from the record by peeling off this film. Polymers, antistatic agents, antifouling agents, mold release agents, and interfacial agents dissolved in a solvent (Japanese Patent Application Laid-open No.
-68980), or simply dissolve polyvinyl chloride, polyethylene, polyvinyl alcohol, polyvinylpyrrolidone, etc. in a solvent (Special Publication No. 51
-43763), as well as vinyl acetate resins, DBP or TCP plasticizers, and antistatic agents containing amine surfactants dissolved in solvents (Special Publication No. 53-43763).
10444, 10445) are known. However, with conventional record cleaning agents of this kind, sufficient consideration has not always been given to the drying time of the film, the surface condition of the formed film, the effect on the record, etc. There are problems with peelability from the disc, and the film is brittle.
The disadvantage is that the coating may break during peeling, or the coating may adhere to the record and remain on the record. In particular, the above-mentioned DBP,
Products using TCP as a plasticizer (Special Publication Act 1973-
Nos. 10444 and 10445) have the problem that these plasticizers corrode records and cause adhesion, and at present there is no satisfactory release film type cleansing agent for records. In view of the above circumstances, the inventors of the present invention have found that, in addition to having a good cleaning effect, the peeling process can be performed continuously and uniformly without breaking or adhering to the record disc during peeling, and that it does not attack the record disc. In order to obtain a peel-off film-type record cleaning agent that does not cause any damage, we have conducted intensive research and found that a film made of alcohol-soluble nylon resin has particularly excellent performance. When a mixture of 10% and 25% water by weight is dissolved in a volatile solvent and a specific antistatic agent is added to the surface of the record, a relatively flexible film is formed and this can be peeled off. At the same time, it can be peeled off as a continuous and uniform film, and dirt, dust, etc. on the record surface and sound groove adhere to this nylon resin coating, and when the coating is removed, these stains are also removed, leaving the record clean. It has been found that it has been cleaned and that its use will not damage the record.
The present invention has now been accomplished. That is, the present invention uses an ethanol-soluble nylon resin and ethanol 75 to 75% as a solvent for dissolving it.
A mixed solvent of 90% by weight and 10 to 25% by weight of water and the following formula as an antistatic agent. (In the formula, R is an alkyl group having 12 to 18 carbon atoms, m, n
are each an integer from 1 to 10. ) The main constituent is 0.01 to 10 parts by weight of an alkylamine ethylene oxide adduct represented by nylon resin based on 100 parts by weight of nylon resin, and the cleaner forms a film of the nylon resin on the surface of the record disc. It provides a curing agent. The present invention will be explained in detail below. The nylon resin used in the present invention is preferably a nylon resin that is soluble in a solvent mainly composed of ethanol, such as Type-8 nylon or Toray Industries' CM-4000, CM-8000, CM-9000, etc. A species or two or more species may be used. In addition, as a solvent, ethanol 75 to 90% by weight,
A mixed solvent consisting of 10-25% by weight of water is used. This is a volatile material that easily dissolves the nylon resin and does not attack the nylon disc. The present invention is formed by dissolving nylon resin in the above-mentioned solvent (the amount of nylon resin blended is 5 to 5 parts per 100 parts by weight (the same applies hereinafter) of the solvent.
By applying this to the record, a film is formed that is relatively flexible and has good removability. It can be peeled off as a continuous, uniform film without leaving any residue.
Although a cleaning agent having excellent film performance can be obtained by using only the nylon resin as described above, a release agent and a plasticizer may also be added to the nylon resin solution. In this case, as the release agent, higher fatty acids having 12 to 18 carbon atoms, such as lauric acid and stearic acid, and higher aliphatic alcohols having 12 to 18 carbon atoms, such as stearyl alcohol and lauryl alcohol, are preferably used. The following formula (1) (In the formula, R is an unsubstituted monovalent hydrocarbon group having 1 to 4 carbon atoms, a is 1 to 100, b is 2 to 50, c is 1 to 5,
x is a positive number from 2 to 40. ), for example, R is a methyl group, a is 80,
Those in which b is 8, c is 3, and x is 10, or those in which R is a methyl group, a is 40, b is 20, c is 3, and x is 10 are preferably used, and these (1) The organopolysiloxane of the formula is not only highly effective, but also has the characteristic of producing a smooth coating surface after drying. By using these release agents, the releasability of the nylon resin coating is further improved, and the coating can be peeled off more easily and reliably as a continuous and uniform film. Note that the above-mentioned release agent may be used alone or in combination of two or more. Also,
The amount of release agent is per 100 parts of nylon resin.
The amount is preferably 0.01 to 5 parts. In addition, as a plasticizer, the following formula (2) (In the formula, R is an unsubstituted monovalent hydrocarbon group having 1 to 4 carbon atoms, b is 2 to 50, c is 1 to 5, and x is a positive number of 2 to 40.) is preferable, for example, R is a methyl group and b is 38, c is 3, and x is 3, or R is a methyl group and b is
20, c is 3, It can be used suitably without any adverse effects. Furthermore, the organopolysiloxane of formula (2) has the function of increasing the compatibility with the resin of the organopolysiloxane of formula (1). The blending amount of these plasticizers is preferably 1 to 10 parts per 100 parts of resin. In addition, plasticizers generally used in nylon resins are vinyl chloride-based plasticizers.
It cannot be used because it has an adverse effect on vinyl records made of vinyl acetate copolymer and may even corrode the records. Furthermore, in the present invention, an antistatic agent is added, which prevents dirt, dust, etc. from easily adhering to the record after the coating is peeled off. As an antistatic agent, especially the following formula (3) (In the formula, R is an alkyl group having 12 to 18 carbon atoms, m, n
are each an integer from 1 to 10. ) are effective. In addition, these antistatic agents are added to 100 parts of resin.
The blending amount is 0.01 to 10 parts. The record cleaning agent of the present invention includes the nylon resin, the antistatic agent shown in formula (3), and if necessary, a release agent, a plasticizer, an antistatic agent other than the above, etc., and the mixture is dispersed and dissolved in the solvent. However, if necessary, an appropriate propellant may be added to form an aerosol. This cleaning agent is used by applying an appropriate method to the surface of the record to form a nylon resin film.By peeling off this film, it removes dirt and dust from the record surface and its sound grooves. Dirt adheres to the coating and is removed together with the coating, thereby cleaning the record. In addition, since the depth of the sound groove in the coating formed on a record is generally 30 to 40 microns, it is preferable to apply the film to a thickness of 50 to 80 microns. Therefore, the record cleaning agent according to the present invention uses an ethanol-soluble nylon resin as the film-forming main agent, so that it is relatively flexible and has excellent film properties with good releasability. A nylon resin coating is formed. Therefore, when the coating is peeled off, it is removed as a continuous and uniform film, and is extremely easy to use. In addition, dirt and dust on the record surface and in the sound groove are reliably attached to the coating and removed, and it has an excellent cleaning effect and does not damage the record, making it suitable as a record cleaner. It is something. EXAMPLES Hereinafter, the present invention will be explained in more detail by showing Examples and Comparative Examples. In addition, in the example below, “part”
All indicate parts by weight. [Example 1] Ethanol 75 parts water 25 〃 Soluble nylon CM-8000 (manufactured by Toray Industries) 12 〃 Polyoxyethylene stearylamine 0.3〃 (m=2, n=2 in formula (3)) [Example 2] Ethanol 80 parts water 20 parts Soluble nylon CM-9000 (manufactured by Toray Industries) 15 〃 Polyoxyethylene oleylamine 0.2〃 (m = 2, n = 3 in formula (3)) [Example 3] Ethanol 80 parts Water 20 〃 Soluble nylon CM-9000 15〃 Organopolysiloxane A 0.1〃〃〃 B 1.0〃 Polyoxyethylene stearylamine 0.2〃 (m=2, n=2 in formula (3)) All of the record cleaning agents according to the above examples It was manufactured by dissolving each other component in a solvent (ethanol-water). The structural formulas of organopolysiloxanes A to B are as follows. Next, about 350 to 400 microns of the cleaning agent of each of the above examples was applied to a record made of vinyl chloride-vinyl acetate copolymer to form a film of about 50 microns, and the drying time of the film was
The surface condition of the formed film, flexibility, removability of the film from a record, cleaning effect, and chargeability after peeling off the film were investigated. For comparison, we conducted the same experiment using commercially available cleaning agents (commercial product 1: a film-removal type, commercial product 2: an aerosol type that sprays the liquid on the record and then wipes it off). I did this. Table 1 shows the results.

[Table] From the above results, the cleaning agent according to the present invention has a good surface condition of the film, has excellent cleaning effects, and also peels off continuously and uniformly when the film is peeled off, and has flexibility in the film. Because of this, it does not cut off in the middle,
It was found that it was very easy to peel off.
It was also found that the drying time was shorter than that of commercially available products, and that it was difficult for dust to adhere after the film was peeled off.

Claims (1)

[Claims] 1. Ethanol-soluble nylon resin, 75 to 90% by weight of ethanol and 10% by weight of water as a solvent for dissolving it.
~25% by weight of mixed solvent and the following formula as an antistatic agent (In the formula, R is an alkyl group having 12 to 18 carbon atoms, m, n
are each an integer from 1 to 10. ) The main constituent is 0.01 to 10 parts by weight of the alkylamine ethylene oxide adduct represented by 100 parts by weight of nylon resin, and a film of the nylon resin is formed on the surface of the record. Cleaning agent for vinyl records. 2. The cleaning agent according to claim 1, wherein the amount of the nylon resin blended is 5 to 30 parts by weight per 100 parts by weight of the solvent.