JPH1025496A - Aerosol composition for cleaning brake equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol composition for cleaning braking, which does not contain a chlorofluorocarbon compound or a chlorinated solvent and can remove asbestos dust, oil fat and such as a brake fluid and a grease and a silicone wax such as a tire polish adhering to a braking in a well-balanced manner. SOLUTION: This composition comprises a base solution comprising 100 pts.wt. 5-9C aliphatic saturated hydrocarbon and 2-220 pts.wt. 3-6C aliphatic saturated ketone and a propellant or comprises a base solution comprising 100 pts.wt. 5-9C aliphatic saturated hydrocarbon and 2-10 pts.wt. 4-6C aliphatic glycol monoalkyl ether and a propellant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to friction brakes, and more particularly to oils and fats such as asbestos dust and grease adhering to rotating bodies such as brake discs and brake drums in disc brakes and drum brakes used in automobiles, and brake fluid. The present invention relates to an aerosol composition for cleaning a brake device which removes and cleans an ozone layer effectively, safely, easily and quickly without destroying the ozone layer without scattering.

[0002]

2. Description of the Related Art In general, a friction brake device for an automobile uses a brake shoe having a brake lining to act as a brake on a rotating body such as a brake disk or a brake drum.

[0003] Asbestos is usually used for the brake lining, and as the brake is used, the asbestos becomes dust and adheres to a brake disk or the like, and eventually has an adverse effect on the braking of the brake.

[0004] In addition to the asbestos, the brake device is formed by removing asphalt into dust, tar components, lubricating oil such as grease used in vehicles, and oils and fats such as oil contained in exhaust gas. Sticks. Further, in recent years, waxes such as silicone emulsion used as a polishing agent for polishing a tire may adhere to the brake device. Since these deposits adversely affect the braking performance, it is necessary to periodically clean the brake device.

Hitherto, various compositions for cleaning brake devices have been studied. In particular, a number of cleaning agents focused on removing asbestos dust have been studied. For example, the following method has conventionally been employed to remove this asbestos dust.

[0006] 1. Spray high pressure air and steam to disperse asbestos. 2. Rinse with water. 3.1.1.1 1 A mixture of a chlorinated hydrocarbon such as trichloroethane and an aliphatic monohydric alcohol is washed as a washing liquid. 4. Washing is performed using a chlorofluorocarbon alone such as chlorofluorocarbon 113 or a mixture thereof with an aliphatic monohydric alcohol as a cleaning liquid. 5. A mixture of a petroleum fraction mainly containing a hydrocarbon having 6 to 10 carbon atoms such as toluene and xylene and an aliphatic monohydric alcohol or the like or an aliphatic dihydric alcohol mono-lower alkyl ether is washed as a washing liquid. (Japanese Patent Publication No. 58-441
No. 18)

[0007]

According to the first method, asbestos dust is scattered, and if the asbestos dust pierces the inner wall of the lung, it is said to increase the carcinogenesis rate, which is a problem in occupational health. For this reason, the above-mentioned method 2 and the like have been considered, but the drying time of water is slow and the working time is extremely long, and it is not possible to cope with the recent increased speed of the working procedure. Also, it is not suitable for cleaning oils and fats.

Therefore, the above-mentioned methods 3, 4, and 5 are methods for solving these problems. In these methods, an alcohol-based solvent (isopropyl alcohol, methyl alcohol, or the like) is used to clean the brake fluid. However, these have a drawback that the cleaning properties of grease and the like are poor. Furthermore, in the methods 3 and 4, recent research results have shown that chlorinated hydrocarbons such as 1.1.1-trichloroethane and chlorofluorocarbons released into the atmosphere destroy the ozone layer, and the production volume is regulated. Have been.

[0009] In addition to the above-mentioned method, there has hitherto not been any method suitable for cleaning all of asbestos dust, brake fluid and grease, and silicone wax in a well-balanced manner. In other words, emphasizing grease removability impairs the removal of silicone wax, and emphasis on removability of brake fluid impairs grease removability. There was nothing to satisfy.

Therefore, there is a demand for a new method of cleaning a brake device which solves these problems.

[0011]

Means for Solving the Problems The present inventors can wash asbestos dust, brake fluid, oils and fats and waxes in a well-balanced manner without using a chlorofluorocarbon-based solvent or a chlorine-based hydrocarbon-based solvent. Various combinations that take into account the characteristics of various solvents that can be used to provide a cleaning agent for brake devices that excel in fire safety, human body safety, brake device safety, and drying properties As a result of repeated and intensive studies, tests were carried out to improve as much as possible while maintaining the balance of the above properties. As a result, the following composition could be achieved.

That is, 100 parts by weight of an aliphatic saturated hydrocarbon having 5 to 9 carbon atoms and an aliphatic saturated ketone having 3 to 6 carbon atoms
It has been found that an aerosol composition for cleaning a brake device comprising a stock solution consisting of .about.220 parts by weight and a propellant is useful. Another embodiment of the present invention comprises a stock solution comprising 100 parts by weight of an aliphatic saturated hydrocarbon having 5 to 9 carbon atoms and 2 to 10 parts by weight of an aliphatic glycol monoalkyl ether having 4 to 6 carbon atoms, and a propellant. It has been found that aerosol compositions for cleaning brake equipment are useful.

The aliphatic saturated hydrocarbon having 5 to 9 carbon atoms used in the aerosol composition for cleaning a brake device of the present invention includes linear or branched pentane, hexane, heptane, octane and nonane. These are two different
Seeds can be mixed and used.

As the aliphatic saturated ketone having 3 to 6 carbon atoms used in the present invention, acetone, methyl ethyl ketone (M
EK), methyl n-propyl ketone, methyl n-butyl ketone, methyl isobutyl ketone (MIBK), diethyl ketone and the like. The mixing amount of the aliphatic saturated ketone having 3 to 6 carbon atoms is 1 aliphatic saturated hydrocarbon having 5 to 9 carbon atoms.
It is 2 to 220 parts by weight based on 00 parts by weight. If the amount is less than 2 parts by weight, the washability of the brake fluid and the silicone wax deteriorates. If the amount is more than 220 parts by weight, the washability of oil components such as engine oil and grease deteriorates. More preferably, an aliphatic saturated hydrocarbon having 5 to 9 carbon atoms 100
It is 10 to 150 parts by weight based on parts by weight.

The glycol monoalkyl ether having 4 to 6 carbon atoms used in another embodiment of the present invention includes ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol. Monoethyl ether, propylene glycol monopropyl ether and the like can be mentioned.

The mixing amount of the glycol monoalkyl ether having 4 to 6 carbon atoms is 2 to 10 parts by weight based on 100 parts by weight of the above-mentioned aliphatic saturated hydrocarbon having 5 to 9 carbon atoms. Fluid detergency is remarkably deteriorated, and if it is more than 10 parts by weight, invasiveness to a paint film such as an automobile body becomes strong and the paint film is attacked. In addition, irritation to eyes and nose becomes strong.

The above-mentioned stock solution for cleaning is aerosolized by a propellant. That is, each cleaning stock solution according to the present invention is aerosolized and sprayed, thereby achieving a well-balanced cleaning effect on each filth that can overcome the conventional problems. As the propellant used in the present invention, liquefied petroleum gas (LPG), dimethyl ether (D
ME), carbon dioxide, compressed air and the like.

The cleaning stock solution and the propellant are used by filling them in a spray container. The spray container may be a commonly used one.

The aerosol composition for cleaning a brake device of the present invention can be used not only for a brake device but also for pretreatment of a flange surface and an adhesive surface, degreasing and cleaning of electronic parts, machine parts, metal products and the like. However, the best effect can be exhibited when used in a brake device.

[0020]

EFFECTS OF THE INVENTION The aerosol composition for cleaning a brake device of the present invention has good cleaning performance on all asbestos dust, oils and fats such as tar and grease, and waxes such as brake fluid and silicone wax attached to the brake device. have. In addition, the safety against fire and the safety against the human body are high, the rubber and plastic parts used in the brake device are not affected, the body painting of the vehicle is not affected, and the drying is quick and the work is easy. An aerosol composition for cleaning a brake device with low toxicity, low irritation to the human body and low odor, which protects the working environment and has almost no effect on vehicle coating.

[0021]

Next, the present invention will be described with reference to examples and comparative examples. The mixing ratio is part by weight.

Preparation of Aerosol Composition A cleaning stock solution was prepared as described in Tables 1 and 2, and was filled in a spray can using LPG as a propellant.

[0023]

[Table 1]

[0024]

[Table 2]

Test Items Detergency A steel plate was coated with engine oil, rubbed with a piece of cork, and coated uniformly. A test plate was prepared by storing the steel plate in a drying oven at 40 ° C. for 24 hours. Similarly, grease, brake fluid and silicone wax were applied, and a test plate was prepared in the same procedure. The test plates fixed vertically were sprayed with the aerosols of Examples and Comparative Examples and dried, and then tested for cleanability by visual inspection, finger touch, and wiping with a rag.

Paint film resistance Automobile body (1991 skyline color: white)
After spraying and drying the aerosols of Examples and Comparative Examples, the erosion of the aerosol on the coating film was examined by visual inspection, finger touch and cross cut test.

Eye and nose irritation A test was conducted to determine whether 10 monitors had eye and nose irritation using the aerosol compositions of Examples and Comparative Examples.

Drying property A drying property test was carried out when applied to a vertically fixed steel plate for 10 seconds. The above test results are shown in Tables 3 and 4.

[0029]

[Table 3]

[0030]

[Table 4]

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location C11D 7:24 7:26)

Claims (2)

[Claims] 1. An aliphatic saturated hydrocarbon having 5 to 9 carbon atoms.
An aerosol composition for cleaning a brake device, comprising a stock solution consisting of 2 parts by weight of an aliphatic saturated ketone having 3 to 6 carbon atoms and 2 to 220 parts by weight of a propellant. 2. An aliphatic saturated hydrocarbon having 5 to 9 carbon atoms.
An aerosol composition for cleaning a brake device, comprising a stock solution comprising 2 parts by weight of an aliphatic glycol monoalkyl ether having 4 to 6 carbon atoms and 2 to 10 parts by weight and a propellant.