JPS6096697A - Detergent for glass - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a precleaning agent for glass, particularly vehicle glass.

More specifically, the present invention relates to a glass cleaning agent comprising a colloidal solution of colloidal silica dispersed in water containing a surfactant and a polyhydric alcohol.

Along with the development of industry, the amount of traffic has increased in recent years, and the components of dirt that adheres to the outer surface of window glass for transportation vehicles, such as automobiles, are not only dirt from road mud and asphalt oil, but also from exhaust gas and More and more air pollution comes from environmental pollution. On the other hand, many automotive polish waxes used to have fatty acid wax as their main ingredient, but in recent years this has been improved to maintain gloss for a long time and improve water resistance against rain. There are an increasing number of polishing waxes based on various resins. These waxes adhere to the glass surface little by little every time you wash your car in the rain and become dirt. At first, such stains on the glass surface are formed by a conventional oil film mainly composed of surfactants or water-soluble solvents.
However, if the components of the dirt adhering to the glass surface harden due to sunlight or changes over time, forming a hard and stubborn resin-like oil film, it is impossible to clean it using the conventional method of rubbing the oil film and stain with a cloth. , it is difficult to remove because the frictional resistance is small and the sliding is good. While the surfactant is adsorbed to the dirt and the "wetting" property is working effectively, the surface of the glass is not hydrophilic, and although it appears that the oil film can be removed during rainy weather, it is difficult to remove the oil film from the surface. When the active ingredient, the surfactant, is washed away by rainwater, its "wetting" properties are lost and the glass surface becomes water-repellent. The proof is that when the wipers are operated in the rain, the water film that wets the oil film disappears, and the small amount of water droplets left behind by the wiper become infinitely fine particles due to the water repellency of the oil film, and reflect light rays diffusely. However, the windshield may become opaque and appear white. Such diffused reflection is extremely dangerous, especially in rainy weather or at night, as it can blind the driver's eyes when exposed to the lights of an oncoming vehicle. In order to ensure safe driving, it is extremely important to completely remove the oil film that causes water repellency from the surface of a vehicle windshield to make it hydrophilic. Conventional chemical glass cleaning agents work on the principle of removing oil films using the properties of surfactants and hydrophilic solvents, but even if they can remove soft oil films, Since the hard resin oil film has low frictional resistance, it slips even when rubbed, making it extremely difficult to remove. Since the surfactant is only adsorbed on the surface of the oil film as a temporary effect, in rainy weather it is washed away by rainwater and loses its effectiveness, making it impossible to keep the glass surface hydrophilic for a long period of time.

As a result of many years of research on glass cleaning agents, the present inventor has found that colloidal silica, preferably 1 to 100 m
By using a cleaning agent containing a colloidal solution in which ultrafine μ particles are transparently dispersed in water, combined with a surfactant and polyhydric alfur, the cleaning power of the glass surface is increased, and the anti-slip effect of silica makes it possible to clean soft surfaces. We have completed the present invention by discovering that it is possible to completely remove not only oil films but also hard resin-like oil films and maintain the surface of cotton glass hydrophilic for a long period of time.

To produce the glass cleaning agent of the present invention, a predetermined amount of water is weighed and placed in a container, and while stirring, a small amount of colloidal silica, a surfactant, and a polyhydric alcohol are added to the water in the order of fc. Once all of these ingredients have been added, make sure that all ingredients are mixed evenly.

The colloidal silica used in the glass cleaning agent of the present invention is particularly preferably ultrafine particles with a particle size of 1 to 100 mμ, and such colloidal silica is commercially available. In addition, any type of surfactant can be used, including anionic, cationic, nonionic, and amphoteric surfactants; It is preferable to use one that has excellent properties and dissolves transparently. Polyhydric alcohols are used as drying regulators, and ethylene glycol, propylene glycol, glycerol, etc. are preferred.

If desired, it is also possible to add, for example, copolymers of silicone and polyether as soil penetrants and wetting agents.

To clean glass using the glass cleaning agent of the present invention, the glass surface is wiped with a cloth soaked in the liquid or sprayed onto the glass surface. It is preferable to spray it in an aerosol type because it can be easily applied to other areas.

Next, we will give a formulation example according to the present invention, and show the test results comparing the cleaning properties of the cleaning agent obtained with this formulation example and a conventional commercially available product (comparative example). First, we will explain the test method and evaluation method. do.

Test method (preparation of test glass plate) (11) Wipe the test surface of the automobile glass thoroughly with a cloth soaked in acetone, then wipe it with a cloth soaked in water to clean it, and use it as a test plate.

(2) For the soft oil film, spindle oil was used, and for the hard oil film, automotive polishing wax containing amino-modified silicone oil as an active ingredient was sufficiently soaked in a cloth and applied to the Test Plus board at 70°C. After leaving it for 48 hours, take it out, leave it in room m (20°C) for another 5 hours, and then wipe it off with a cloth. The same method is repeated twice on the test plate.

(Test method) A cloth is soaked with various samples 102, applied to a test plate, and the sample is wiped off to the extent that it cannot be seen with the naked eye.

Evaluation method A test plate treated with various samples as described above is sprayed with water in a polar shape, and the water repellency of the test plate is used to confirm the cleansing ability for soft and hard oil films.

In addition, Snowtex and L- used in the formulation example
77 is from Book F.

Colloidal silica manufactured by Snowtex Nichikagaku Co., Ltd. (various grades depending on particle size and other properties) L-77 Copolymer blending example of silicone and polyether from JM Nippon Nijika Co., Ltd. 1 Weight % Snowtex 20 (particle size 10-20 mμ) 20.0 1,000-fluoroalkylethylene oxide adduct (E, O, = 10-20) 0.5 Polyoxyethylene nonylphenol (E, O, = 8-12) 4 .0 Ethylene glycol 7.0 L-770.7 Water 67.5 Formulation example 2 Weight: Snowtex 60 (particle size 10-20 mμ) 20.0 7-Fluoroalkyl ethylene oxide adduct (E, O, = 10- 20) 0.5% by weight Sodium dodecylbenzenesulfonate 4.0 Propylene glycol 7.0 L-770.7 Water 67.8 Formulation example 6 Weight% Snowtex N (particle size 10-20 mμ) 20.0 yf-Fluoro Alkyl sulfone m salt o, 5 polyoxyethylene alkyl phenol ether sodium sulfate 6.0 Glycerin 4.0 L-770.7 Water 68.8 Formulation example 4 Weight % Snowtex 20L (particle size 40-50 mμ) 20.0 Noya -Fluoroalkyl caldic acid 4 o,s Sodium polyoxyethylene alkyl ether sulfate 6.0 Diethylene glycol 6.0 L-770.7 Water 66.8 Formulation example 5 Weight ratio Snowtex OL (particle size 40-50 mμ) 20. 0 Perfluoroalkyltrimethylammonium salt 7.0 Polyoxyethylene polyoxypropylene block polymer 2.0 L-770.7 Propylene glycol 7.0 Water 63.3 Formulation example 6 Weight-based Snowtex ZL (particle size 70~ 100 mμ) 20.0 monofluoroalkyl ethylene oxide adduct (ε, 0. = 10-20) 0.5 polyoxyethylene nonylphenol (E, O, = 8-12) 4.0 Ethylene glycol 7.0 L -770.7 Water 67.5 Comparative Example 1 Commercially available oil film and film containing anionic surfactant as active ingredient
and anti-fog agent.

Comparative Example 2 A commercially available oil film remover and antifog agent containing a nonionic surfactant as an active ingredient.

Comparative Example 6 Weight % Lauryl Sulfate Triethanolamine 5.0 Propylene Glycol 5.0 Water 90.0 Comparative Example 4 Heavy F# Sodium Tidodecylbenzenesulfonate 5. Q Sodium orthosilicate 1.0 Glycerin 7.0 Water 87.0 As shown in Table 1, as a result of testing each sample of the above formulation example and comparative example using the above test method, the glass cleaning agent of the present invention was found to be far superior to conventional glass surface treatment agents.

Claims (1)

[Claims] A glass cleaning agent characterized by containing a surfactant and a polyhydric alcohol in a colloidal solution in which colloidal silica is dispersed in water.