JPS6028880B2 - Cleaning agent for record discs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning agent for a record disc, and more specifically, by forming a film on the surface of a record disc and peeling it off, the cleaning agent cleans the record disc surface and its sound grooves. This invention relates to a cleaning agent for record discs, which is used to remove certain dirt, dust, and other dirt that adheres to this coating.

Conventionally, a film is formed on the surface of a record, and by peeling and removing this film, dirt and dust on the record are removed.
As a cleaning agent for vinyl records that removes dust, etc., water-repellent polymers such as polyvinyl alcohol, antistatic agents, anti-static agents, mold release agents, and surfactants are dissolved in a solvent (Samurai). 1971 Ippuku No. 98), or simply dissolved polyvinyl chloride, polyethylene, polyvinyl alcohol, polyvinylpyrrolidone, etc. in a solvent (Japanese Patent Publication No. 51-43763), as well as vinyl acetate resin, D
BP or TCP dissolved in an antistatic agent containing a plasticizer and an amine surfactant (Japanese Patent Publication No. 53-10444)
No. 10445) is 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 is a problem with peelability from the board.
The coating is brittle and has the disadvantage that it may break during peeling, or the coating may adhere to the record and remain on the record.

In particular, those using the above-mentioned DBP and TCP as plasticizers (Japanese Patent Publication Nos. 10444 and 10445) have the problem that their plasticity corrodes the record or causes adhesion, and release film type At present, there is no satisfactory cleaning agent for record discs. In view of the above circumstances, the inventors of the present invention have found that not only the cleaning effect is good, but also the peeling can be performed continuously and uniformly without breaking or adhering to the record during peeling, and it does not attack the record. In order to obtain a peel-off film type cleaning agent for records that does not cause damage, we have conducted intensive research and found that the resin is polyvinyl butyral, especially with a degree of polymerization of 400 to 1200.
Butyral group: 60-75 mol%, hydroxyl group: 25-40
It was found that mol% had excellent coating properties, and in addition to releasing it, the following formula '1} (wherein R is an unsubstituted monovalent hydrocarbon having 1 to 4 carbon atoms) was used as a release agent. group, a is 1~
100, b is a positive number from 2 to 50, c is a positive number from 1 to 5, and x is a positive number from 2 to 40.

) 0.01 to 5 parts by weight based on the weight of the resin 10 and a plasticizer of the following formula (1) (where R is an unsubstituted monovalent hydrocarbon group having 1 to 4 carbon atoms , b is a positive number from 2 to 50, c is a positive number from 1 to 5, and x is a positive number from 2 to 40.

) by simultaneously blending 5 to 3 parts by weight with respect to 10 parts by weight of the resin, and by blending an antistatic agent, especially an alkylamine aethylene oxide adduct, it is possible to form a film for the first time. It has been found that the releasability is improved, and a smooth, uniform, and flexible film is formed on the record, and that the releasability is also good, and when it is peeled off, it can be easily peeled off as a continuous and uniform film.
In addition, dirt, dust, etc. adhere to the surface of the resin-coated record and the sound grooves, and when the coating is removed, these dirts are also removed and the record is cleaned, and furthermore, the use of the record does not cause any damage to the record. The present invention was developed based on the knowledge that dirt, dust, etc. are difficult to adhere to after the film is peeled off. The present invention will be explained in detail below.

The polyvinyl butyral used in the present invention is not particularly limited, but has a polymerization degree of 400 to 12 in terms of usability, viscosity of the cleaning agent, ease of application, ease of forming a film, etc.
00, butyral group is 60-75 mol%, hydroxyl group is 25
It is desirable to have a content of ~40 mol%, and among them, those with a large number of hydroxyl groups are excellent in terms of releasability.

The amount of the resin blended is 5 to 30 parts per 100 parts (parts by weight, same hereinafter) of the solvent described below, and if the amount of the resin blended is small, it is difficult to form a good film, and the amount is more than the above range. The viscosity becomes too high, making it difficult to use, which is undesirable. Furthermore, in the present invention, in addition to the above-mentioned resin, an organopolysiloxane represented by the above formula {1}, such as those represented by the formulas A and C described below, is added as a release agent in an amount of 0.01 to 0.01 to 100 parts per 100 parts of the resin. 5 parts of the resin 100 and organopolysiloxane represented by the above formula (1) as a plasticizer, such as those represented by the formulas B and D described later.
5 to 30 parts per part. The organopolysiloxane of formula {1) has high releasability and also has the characteristics of forming a smooth coating surface after drying. In addition, the organopolysiloxane of formula {2- has the function of increasing the compatibility with the resin of the organopolysiloxane of formula m, and also improves the releasability.
By blending organopolysiloxane (2), the peelability and flexibility of the PoIJ vinyl butyral coating are improved, and the uniformity is also increased, which prevents the coating from breaking or adhering to the record when it is peeled off. The film forms a continuous, uniform film that can be easily peeled off. Furthermore, these organopolysiloxanes of formulas [1' and [2] are excellent in safety and solubility (compatibility with solvents and resins). On the other hand, those that do not contain the above-mentioned release agents and plasticizers do not have sufficient removability and flexibility, and the film may be uneven and uneven, and may break or adhere during peeling. The purpose of the invention cannot be achieved. In particular, DOA, DBP, which has traditionally been used as a plasticizer,
TCP and the like are also used in the vinyl chloride-vinyl acetate copolymer, which is mainly made of vinyl chloride, which is a raw material for vinyl records, and cannot be used because it has an adverse effect on the record, corroding the record, or causing adhesion. Furthermore, if the blending amount of the release agent and plasticizer is less than the above-mentioned range, sufficient releasability and flexibility will not be obtained, and the effects of the present invention will not be achieved. On the other hand, even if a release agent or plasticizer is added in an amount greater than the above-mentioned range, no further effect can be obtained due to the increased amount, and the uniformity of the liquid may be affected.
This is undesirable because it adversely affects the uniformity of the coating, increases the drying time after application of the cleaning agent, and may make the coating sticky. In the present invention, higher fatty acids and higher aliphatic alcohols cannot be used because they have no peeling effect.
In the present invention, an antistatic agent is further blended in addition to the above components. This allows dirt to be removed from the record after the film is removed.
This prevents dust and the like from easily adhering. Antistatic agents include non-phosphorus surfactants such as higher alcohol-ethylene oxide adducts, fatty acid ethylene oxide adducts, and alkylamine ethylene oxide adducts.
In particular, the following {3-formula (in the formula, R is an alkyl group having 12 to 18 carbon atoms, m and n are each an integer of 1 to 10).

) is effective. It is preferable that these antistatic agents be blended in an amount of 0.01 to 1 part per 100 parts of resin.
Any solvent can be used as long as it dissolves the resin and other components and does not attack the record, such as water, lower aliphatic alcohols such as methanol and ethanol, n-pentane and n-pentane, etc. -Although aliphatic hydrocarbons such as hexane are used, water-ethanol mixtures or n-hexane-ethanol mixtures (in both cases, the amount of ethanol is 7% by weight or more) are preferably used.
In addition, in the present invention, in addition to the above-mentioned components, anti-inflammatory agents, pigments, fragrances, etc. can also be blended. The record cleaning agent of the present invention is produced by adding polyvinyl butyral, a release agent, a plasticizer, an antistatic agent, etc., and dispersing and dissolving it in the solvent, and optionally adding an appropriate propellant. It can also be made into an aerosol. This cleaning agent is used by applying an appropriate method to the surface of a record to form a film of polyvinyl butyral resin. By peeling off this film, it cleans the surface of the record, removes dirt and dust from the old grooves. Dirt that adheres to the coating is removed together with the coating, and the record is cleaned thoroughly.

In addition, since the depth of the sound groove is generally 30 to 40 mm, it is preferable to apply the film to a thickness of 50 to 80 mm. Therefore, the record cleaning agent according to the present invention has the above-mentioned m
By blending the organopolysiloxane represented by the formula , (■) as a release agent and plasticizer, as well as an antistatic agent, the record surface is uniform and has a good surface condition.
A film is formed that is flexible and has excellent releasability, and when the film is peeled off, it becomes a continuous, uniform film without the inconvenience of the film breaking in the middle or adhering to the record. It can be easily peeled off and removed, making it 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. Furthermore, it is difficult for dirt, dust, etc. to adhere to the surface of the record after the film is peeled off.
EXAMPLES Hereinafter, the present invention will be explained in more detail by showing Examples and Comparative Examples. In addition, in the following examples, all "parts" indicate parts by weight. Example 1 Ethanol 8 Ikari Gisui
20〃Polyvinyl butyral (degree of polymerization 800, butyral group 65 mol%
, hydroxyl group 35 mol%) 20 Organopolysiloxane A O. 2〃Organoborisiloxane B I. 5〃Polyoxyethylene stearylamine 0.2〃(m in formula lake:
2, n=2) Example 2 Ethanol 8 Foundation water
20〃Polyvinyl butyral (degree of polymerization 400, butyral group 65 mol%
, hydroxyl group 35 mol%) 16〃Polyvinyl butyral (polymerization degree 1200, butyral group 65 mol%, hydroxyl group 35 mol%) 4〃Organopolysiloxane CO. 3. Organopolysiloxane D I. 0〃Polyoxyethylene oleylamine 0.4〃(m=2, n in formula paste
=3) Comparative example 1 ethanol 8 anchor water
- 20〃Polyvinyl butyral (degree of polymerization 800, butyral group 60 mol%
, hydroxyl group 40 mol%) 20〃Stearyl alcohol 1〃Organopolysiloxane B
I. 5 Comparative example 2 Ethanol
8 foundation water
20〃Polyvinyl butyral (degree of polymerization 800, butyral group 60 mol%, hydroxyl group 40 mol%
) 20 Organopolysiloxane A
O. 2〃Polyoxyethylene stearylamine 0.2〃(Formula (3'' where m=2, n=2
) The record cleaning agents according to each of the above examples were manufactured by dissolving the other components in a solvent (ethanol-water).

The structural formulas of organopolysiloxanes A to D are as follows. P,:-C3 day 60 (C2 day 40),. Day P2: -C3 day 60 (C2 day 40) 3rd day P3: -C3 day 60 (C2 day 40).

Day P4: -C3 day 60 (C2 day 40).

Approximately 350 to 400 coats 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 approximately 50 μm, and the drying time of the film was The surface condition of the film, flexibility, removability of the film from the record, cleaning effect, and chargeability after peeling off the film were investigated.

For comparison, a commercially available cleaning agent (commercial product 1:
Release film type, commercially available product 2: Aerosol type that can be wiped off after exposing the liquid to the record)
A similar experiment was conducted using . Table 1 shows the results.

Table 1 However, the evaluation criteria are as follows.

Membrane surface condition: ○: The dry film surface is smooth.

Δ: The surface is slightly uneven.

×: The surface is uneven.

Flexibility: ○: Flexible, and the film does not break midway during peeling.

×: There is no flexibility, and the film is cut in the middle when peeled off.

Peelability: ◎: Easily peeled off continuously and uniformly.

◯: Peeling off continuously and uniformly, but there is a slight sense of adhesion.

Mouth: It peels off, but the film is cut in the middle.

△: Slight adhesion but peeling.

×: Adhesion is observed and no peeling occurs.

Cleaning effect: ○: Based on the results of microscopic observation (sound at a magnification of 40), no dust was observed on the surface of the code board.

△: Some dust remains.

×: A considerable amount of garbage remains.

Chargeability: ○: Dust is difficult to adhere to after peeling.

△: Dust adheres within several hours after peeling.

x: Dust adheres immediately after peeling.

From the above results, the cleaning agent according to the present invention requires a good surface condition of the film, has an excellent cleaning effect, and when the film is peeled off, it peels off continuously and uniformly, and the film has flexibility. It was recognized that the film did not break midway and was very easy to peel off.

Claims (1)

[Claims] 1 The resin is polyvinyl butyral, and the release agent is the following formula ▲ Numerical formula, chemical formula, table, etc. ▼ (In the formula, R is an unsubstituted monovalent hydrocarbon group having 1 to 4 carbon atoms, a
is 1-100, b is 2-50, c is 1-5, x is 2-4
It is a positive number of 0. ) Organopolysiloxanes and plasticizers have the following formula ▲ Numerical formula, chemical formula, table, etc. ▼ (In the formula, R is an unsubstituted monovalent hydrocarbon group having 1 to 4 carbon atoms, b
is a positive number of 2 to 50, c is a positive number of 1 to 5, and x is a positive number of 2 to 40. ), an antistatic agent, and a solvent that dissolves the resin, release agent, plasticizer, and antistatic agent, and the blending amount of the resin is based on 100 parts by weight of the solvent. 5 to 30 parts by weight, and the amount of the release agent added is 0.01 parts by weight per 100 parts by weight of the resin.
~5 parts by weight, and the blending amount of the plasticizer is 10 parts by weight of the resin.
The amount of the antistatic agent is 0.01 to 10 parts by weight based on 100 parts by weight of the resin.
A cleaning agent for record discs, characterized in that it is by weight and forms a film of the resin on the surface of the record disc. 2 Polyvinyl butyral has a polymerization degree of 400 to 1200
The cleaning agent according to claim 1, which contains 60 to 75 mol% of butyral groups and 25 to 40 mol% of hydroxyl groups. 3. The cleaning agent according to claim 1 or 2, wherein the solvent is a water-ethanol mixture or an n-hexane-ethanol mixture containing 70% by weight or more of ethanol. 4 The antistatic agent is an alkylamine represented by the following formula ▲ Numerical formula, chemical formula, table, etc. ▼ (In the formula, R is an alkyl group having 12 to 18 carbon atoms, and m and n are each an integer of 1 to 10.) The cleaning agent according to any one of claims 1 to 3, which is an ethyne oxide adduct.