JPH0448510B2 - - Google Patents

Description

[Detailed description of the invention]

-Field of Industrial Application- The present invention relates to a maintenance method for maintaining a clean and glossy surface of a building floor, particularly a plastic flooring material. -Prior Art- It has been conventional practice to apply a release agent to give gloss and cleanliness to the floor surfaces of buildings. When the flooring material is a plastic flooring material, a resin wax called a non-buffable type or a semi-buffable type is used as a release agent. The surface of the floor surface coated with such wax is protected by the resin wax and has gloss and stain resistance, but it is important to avoid loss of gloss due to use, stains due to black heel marks, and surface scratches. I can't do it. Therefore, it is necessary to periodically clean the surface to maintain cleanliness and gloss, that is, maintenance work. Conventional maintenance work for floors coated with resin-based wax is to remove dust from the floor, remove dirt with a cleaning agent, remove waste water from cleaning, dry, and re-apply resin-based wax to finish. This is done in the following steps. -Problems to be Solved by the Invention- However, the above cleaning process uses a large amount of water, so it must be carried out by moving the utensils installed on the floor, and it also requires the use of equipment such as a sewage suction device. The work is complicated, and if there are gaps in the floor surface, there is a problem that sewage may leak under the floor. However, with the conventional cleaning agents used in the above-mentioned cleaning process, it is difficult to remove dirt that has stuck to the surface of the floor or that has penetrated into the interior of the floor by simply wiping or washing it off. There's a problem. For example, vinyl tiles and vinyl asbestos tiles are widely used as flooring materials in offices, hospitals, etc., and resin-based wax is usually coated on top of these flooring materials. The scratches on the bottom (black heel marks) dig into the wax film and remain black. It is difficult to wash off this stain with ordinary cleaning agents, and in this case, it is necessary to remove it together with the resin wax using a cleaning agent called a ``removal agent'' containing cellosolve, which is extremely complicated. It is. On the other hand, a polishing agent is known in which an alkali-soluble resin that acts as a detergent and a surfactant are added to a resin-based wax, thereby cleaning old coatings at the same time as waxing. However, although this type of polishing agent can remove minor stains such as oil stains on the coating surface, it is completely impossible to remove stains that have dug into the coating film, such as black heel marks. Furthermore, addition of a large amount of alkali-soluble resin has the disadvantage that the function of the re-formed coating film as a protective film, particularly the water resistance, is greatly reduced. The purpose of this invention is to solve the above-mentioned conventional problems, and it does not require the conventional cleaning process using a cleaning agent or stripping agent, and can perform the conventional processes described above in one step. Therefore, it is extremely easy to keep the floor clean, and the floor surface can be protected with a coating film that has excellent gloss, strong water resistance, durability, and stain resistance. The purpose is to provide a cleanliness maintenance method. -Means for solving the problem- In the method of the present invention, a polishing cleaning agent is used to maintain the cleanliness of the floor surface. This polishing cleaning agent is a composition containing 6 to 24 percent by weight of a polymer having the following structural formula and having a weight average molecular weight of more than 8,000 and less than 45,000, and is an aqueous solution having a pH of 6.5 to 10. In the above structural formula, M is another vinyl monomer to be added and copolymerized if necessary, and R ₁ is hydrogen or has 1 carbon number.
an alkyl group having 1 to 3 carbon atoms, R ₂ has 1 carbon number
to 8 alkyl groups and hydrogen necessary to make the acid value 70 to 650 mg KOH per gram of polymer, m and n are the weight average molecular weight of the polymer of 8000
Represents the positive number necessary to exceed 45,000 and be less than 45,000. In the method of the present invention, a polishing cleaning agent made of the above-mentioned composition is applied to a floor surface coated with or not coated with a resin wax in advance and dried, and the polishing cleaning agent is dried on the surface layer of the floor surface. Forming a coating film formed by the above method. When the floor surface becomes soiled, wipe the floor surface with a mop or the like moistened with the above-mentioned polishing cleaning agent.
The old coating is redissolved to remove dirt and a new coating of the polishing cleaning agent is formed on the surface layer. The monomers of the polymer contained in this polish cleaning agent are randomly bonded. Examples of the monomer include methacrylic acid methyl ester, acrylic acid butyl ester, methacrylic acid, and acrylic acid, and if necessary, vinyl monomers such as acrylonitrile, vinyl acetate, and styrene can be used as a copolymer. Moreover, the acid value is adjusted by the amount of acrylic acid or methacrylic acid. The above monomers are polymerized by conventional solution polymerization, bulk polymerization, suspension polymerization, or emulsion polymerization. It is also effective to use a chain transfer agent to adjust the molecular weight. Mercaptans and halogenated carbons can be used as chain transfer agents, specifically dodecyl mercaptan, lauryl mercaptan,
Carbon tetrachloride, bromotrichloromethane, etc.
The molecular weight of the polymer varies depending on the polymerization conditions, but is roughly determined by the molar ratio of the chain transfer agent and the weight component.
Specific examples include U.S. Patent No. 2870116 and U.S. Patent No.
Examples are given in No. 2870117, Japanese Patent Publication No. 14019/1974, etc. Another method for adjusting the molecular weight is by adjusting the polymerization temperature, the concentration of the polymerization initiator, and the type of solvent for solution polymerization, as exemplified in JP-A-54-64532. The polymer thus obtained may contain a large amount of chain transfer agent and have a strange odor, or may be contaminated with solvents,
When a problem with residual monomer odor occurs, it is necessary to remove it. In such cases, it is possible to almost completely remove it by azeotropic removal with water, steam distillation, vacuum distillation, etc. It is.
The molecular weight of the polymer thus obtained can be easily measured by gel permeation chromatography (GPC method). In the polymer obtained above, the carboxyl group is neutralized with ammonium, an amine, or an amino alcohol to become a salt, exhibiting water solubility and dissolving in water, and exhibiting a pale yellow or colorless transparent or translucent appearance. -Function- When an aqueous solution of the above polymer, that is, a polish cleaning agent referred to in the present invention, is applied to a floor surface, the volatile components are dried and removed, resulting in a gloss with sufficient water resistance, water resistance, and stain resistance. A film remains that protects the floor surface. If a resin-based wax has been applied to the floor surface in advance, a polishing cleaning agent is applied thereon so that a film of the polishing cleaning agent is formed on the surface layer of the floor surface. If this film becomes dirty, gently wipe it with a mop moistened with the same polishing detergent to remove dirt that has stuck to the film surface, such as dust and oil stains, as well as dirt that has burrowed into the film, such as black heel marks. Dirt can also be easily removed, and once the stain has been removed, the polishing agent dries to form a new coating that adds shine and protection to the floor. The dirt removal mechanism is considered to be performed by the following mechanism. The stains that have adhered to the floor coated with the polymer contained in the polishing cleaning agent of the present invention can be removed by soaking the polishing cleaning agent into a mop or the like and gently wiping it.
Ammonia, amines, and
Amino alcohols, etc. react with the carboxyl group of the coating film to form a salt of the carboxyl group, and the coating film is redissolved, and the dirt stuck to the coating film is dissolved together with the coating film and wiped off with a mop etc., making it dirty. It is believed that the polymer is replaced with fresh polymer, leaving a clean, glossy coating after drying. For the coating film obtained in this way to have water resistance, the molecular weight must exceed 8000 in terms of weight average molecular weight.
It must be less than 45,000. (The molecular weight below refers to the weight average molecular weight.) When the molecular weight is less than 8,000, it has excellent detergency and gloss, but it is significantly inferior in water resistance, while when the molecular weight exceeds 45,000, it is excellent in water resistance and gloss, but it is extremely inferior in detergency. In order to achieve the object of the present invention, the effect can be further enhanced by adding other auxiliary agents to the above polishing cleaning agent. In order to further improve the cleaning performance, it is preferable to raise the pH to 9 or above with ammonia or morpholine, but if the pH exceeds 10, the ammonia odor or amine odor will be strong, causing problems in use. Furthermore, water-soluble solvents (e.g., butyl cellosolve, butyl carbitol, N-methylpyrrolidone, etc.) may be added to provide additional cleaning power, and other ordinary nonionic surfactants (e.g., nonylphenol ethylene oxide adduct), Anionic surfactants (e.g., sodium dodecylbenzene sulfonate, etc.), fluorine-based surfactants (e.g., the surfactants described in U.S. Pat. No. 2,937,098, etc.), caustics (e.g., sodium hydroxide, etc.) are also added. Also good. In addition, to further increase water resistance, polyvalent metal complex salts (e.g. ammine complex of zinc carbonate, amino acid complex of zinc, etc.),
A crosslinking agent capable of crosslinking with a carboxyl group or a hydroxyl group (for example, a polyaziridine compound, a water-soluble epoxy compound, etc.) may also be added. Furthermore, high boiling point water-soluble solvents (for example, ethyl carbitol, etc.) may be added to further impart gloss to the coating film. For the purpose of preventing dust from adhering, waxes (for example, emulsions of polyethylene wax, etc.) may be added. Acrylic emulsion polymers, rosin-modified maleic acid resins, styrene maleic acid resins, water-soluble acrylic resins (molecular weight less than 8,000 or more than 50,000), antifoaming agents, etc. may also be added for various other purposes, but the minimum It is better to keep it at that. -Examples- Next, Examples of the present invention will be described, in particular, some representative compositions of polishing cleaning agents and the results of tests conducted using the polishing cleaning agents. The composition of the polishing cleaning agent in the following description is in parts by weight unless otherwise specified. Polymer Nos. 1 to 4 in Table 1 and Reference Example A,
Water and various additives listed in Table 2 were added to the polymer B in order and mixed using a stirrer to obtain Samples 1 to 4 and Reference Samples A and B.

[Table] (In the table, MMA is methyl methacrylate, BA is butyl acrylate, ST is styrene, AN is acrylonitrile, MAA is methacrylic acid, and AIBN is azobisisobutyronitrile. The molecular weight is determined by high performance chromatography. Measured with HLC-802UR (GPC, manufactured by Toyo Soda Co., Ltd.)

【table】

[Table] Each sample obtained was placed on a white vinyl tile.
g/ ^m2 , dried at room temperature for 12 hours, and then tested using a black heel mark tester (Snell Capsule Tester, US CSMA Bulletin No.9-
73) with a black heel mark. Next, the sample was soaked into a mop and the surface of the vinyl tile bearing the black heel mark was gently wiped, and the degree of stain removal of the black heel mark was observed to examine the cleanability. Next, place 15 of each of the above samples on the black vinyl tile surface.
It was applied at a rate of g/m ² and dried at room temperature for 12 hours.
Next, let the sample soak into the mop again 15
After coating at a ratio of g/m ² and drying at room temperature for 12 hours, the gloss, leveling property, and water resistance of the tile surface were evaluated. Gloss was measured using 60° specular reflectance of US CSMAD1455-64. The leveling property was evaluated visually based on the lack of motu application marks (smoothness). Water resistance was evaluated by dropping 1 ml of water onto the coated tile, leaving it for 1 hour, wiping off the water, drying, and visually evaluating the extent to which white marks remained. The evaluation results are shown in Table 3.

[Table] - Effects of the Invention - According to the method of the present invention explained above, the cleaning work with washing water and the work of removing waste water (after-wiping, etc.), which were required in conventional floor maintenance work, are no longer necessary, and it is extremely effective. You can keep the floor clean with a simple operation, and black heel marks can be easily removed. The floor surface treated by the method of this invention has a coating film formed by the polymer contained therein as the moisture in the gloss cleaning agent evaporates, giving it an excellent gloss and requiring frequent wiping with water. The surface is finished with water resistance, strong durability, and stain resistance, and can be kept sufficiently clean even on floors where you walk on with shoes on. As is clear from the above examples, the polishing cleaning agent used in the method of the present invention has a good balance of cleaning performance and water resistance, and has good gloss and excellent leveling properties.

Claims (1)

[Scope of Claims] 1. A polymer having the following structural formula with a weight average molecular weight of more than 8,000 and less than 45,000 is applied to a floor surface with or without resin wax applied in advance in weight percent of 6.
A coating film is formed on the surface layer of the floor by applying an aqueous solution containing 24% to 24% and adjusting the pH to a range of 6.5 to 10. When the floor surface becomes soiled, it is wiped with the aqueous solution to remove the old surface layer. A method for maintaining the surface cleanliness of a floor surface, characterized by cleaning the floor surface by dissolving and removing the film and forming a new coating film at the same time. However, in the formula, M is another vinyl monomer to be addition-copolymerized if necessary, R ₁ is hydrogen or an alkyl group having 1 to 3 carbon atoms, and R ₂ is an alkyl group having 1 to 8 carbon atoms and an acid value. Hydrogen required to make 70 to 650 mg KOH per gram of coalesce, m and n are the weight average molecular weight of the polymer 8000
Represents the positive number necessary to exceed 45,000 and be less than 45,000.