JPS6154070B2 - - Google Patents

Description

[Detailed description of the invention]

This invention was obtained by polymerizing [B] a monoethylenic monomer using [A] a carboxyl group-containing alkali water-soluble copolymer containing a conjugated diene monomer as an emulsifying dispersant. [C] This invention relates to a novel [D] floor polishing agent containing an aqueous polymer dispersion as a main component. In particular, the present invention protects flooring materials, gives gloss, has excellent anti-slip properties and excellent adhesion to tiles, and is not removed by detergents and water used for floor washing, but can be removed by aqueous alkaline cleaners. The present invention relates to an alkali-removing floor polishing agent that can be easily removed. This type of floor polishing agent uses an aqueous dispersion of a resin copolymerized with a monomer containing a carboxyl group as the main raw material, and contains an alkali-soluble resin, wax (hereinafter sometimes referred to as wax), plasticity, dispersibility, Those containing emulsifying properties, compatibility, and polyvalent metal compounds are mainly used. Although floor polishing agents are made by blending many raw materials, their performance largely depends on the properties of the carboxyl group-containing polymer, which is the main raw material, and there are many patents related to this. For example, those using copolymers of α/β-unsaturated carboxylic acid monomers and acrylic monomers (Tokuko Showa)
47-14019), emulsion polymerization of a mixture of ethylenically unsaturated carboxylic acid monomer, acrylic monomer and other monomers in two stages (JP-A-49-30474), methacrylic acid Those using partial hydrolysates of ester oligomers (Special Publications 1973-
151941). However, these are too sensitive to alkali and have poor water resistance, so they do not satisfy the characteristics required as a floor polishing agent in a well-balanced manner. In addition, in recent years, there has been a demand for floor polishing agents that are safe against slips while walking and that can accommodate changes in flooring materials. In other words, the former is a floor polishing agent with low slip resistance, and the latter is a material change from vinyl asbestos belt to homogeneous vinyl tile (sheet) and rubber tile, which requires a floor polishing agent that has good adhesion to the material. There is. However, when using the conventionally used copolymer emulsion, the solution is to change the type of wax or the ratio of copolymer emulsion and wax, but it is not good in terms of balance. sea bream. In order to solve these problems, the inventors
As a result of synthesizing various polymers, creating floor polishing agents blended with them, and evaluating the required properties, we have emulsified and dispersed a carboxyl group-containing alkali water-soluble copolymer containing a conjugated diene monomer as described below. Used in medicine,
The present invention was completed based on the discovery that a floor polishing agent having well-balanced properties can be obtained by using an aqueous dispersion obtained by polymerizing a monoethylenic monomer. This invention provides the following. In polymerizing [B] using [A] as an emulsifying dispersant, (i) [A] is (a) 5 to 30% by weight of conjugated diene monomer (b)
Methacrylic acid and/or acrylic acid 10-25
(c) styrene 5-40% by weight, (d) acrylic acid alkyl ester with an alkyl group of _C2 - _C8 and/or methacrylic acid alkyl ester with an alkyl group of _C1 - _C12 5-80 % by weight in a C ₁ - C ₄ saturated monohydric alcohol, the copolymer has a glass transition temperature of 10 - 100°C and 30% by weight in tetrahydrofuran.
20 to 80 parts by weight of an alkaline aqueous solution of a carboxyl group-containing alkaline water-soluble copolymer having an intrinsic viscosity of 0.3 dl/g or less at °C as a solid content, (ii) [B] has an alkyl group of C ₂ to C ₈ acrylic acid alkyl ester, the alkyl group is _C1 - _C12
Using 100 parts by weight of a monoethylenic monomer mainly consisting of one or more monomers selected from methacrylic acid alkyl esters, the glass transition temperature of the produced (co)polymer [B'] is 20 to (iii) in an aqueous medium with a pH of 7 or higher; [D] bed characterized by using the resulting [C] aqueous polymer dispersion, an alkali-soluble resin, and wax; Polishing agent. The feature of this invention is to use a conjugated diene-containing aqueous polymer dispersion containing almost no ordinary low-molecular-weight emulsifier or electrolyte, and also to use a polymer whose alkaliphilicity and hydrophobicity are suitably balanced. There is a particular thing. Generally, the particle size of the polymer in an aqueous polymer dispersion tends to be large in order to reduce the amount of emulsifier used due to problems such as water resistance. However, in the present invention, the particle size of the polymer is small, about 800 Å (angstroms) or less, and therefore has excellent gloss which is easily affected by the particle size. In addition, the carboxyl group-containing alkaline water-soluble copolymer contains a moderate amount of conjugated diene monomer, which exhibits strong resistance to friction during walking.
It has been found that this product exhibits an unprecedentedly strong adhesion to PVC and rubber tiles. [A] The carboxyl group-containing alkali water-soluble copolymer used in this invention is (a) conjugated diene monomer 5 to
(b) methacrylic acid and/or acrylic acid 10-25%, preferably 15-20% by weight, (c) styrene 5-40%, preferably 16-20% by weight. 35% by weight, (d) alkyl group
_C2 - _C8 acrylic acid alkyl esters and/or
Alternatively, the alkyl group consists of 5 to 80% by weight of a _C1 to _C12 methacrylic acid alkyl ester. (a) If the conjugated diene monomer content is less than 5% by weight, slip resistance and adhesion to tiles will be poor. If the amount is more than 30% by weight, not only will the scratch resistance and stain resistance deteriorate, but there will also be a tendency for discoloration. Examples of the conjugated diene monomer include butadiene, isoprene, neoprene, etc., but butadiene is particularly preferred. (b) If the amount of methacrylic acid and/or acrylic acid used is less than 10% by weight, the solubility of the copolymer in alkaline aqueous solutions decreases, and at the same time, when used as a floor polishing agent, the removability of alkaline cleaners decreases.
Glossiness deteriorates. If it is more than 25% by weight, the copolymer will have a high viscosity when dissolved in an alkali, resulting in poor workability. Furthermore, the stability of the monoethylenic monomer during polymerization is poor, and even when used as a floor polishing agent, the alkali solubility is too high, resulting in poor water resistance and detergent resistance.
Furthermore, when multiple layers are applied, the lower layer is re-dissolved and the gloss is significantly reduced. As acidic monomers, methacrylic acid and/or acrylic acid are used. Among these, methacrylic acid is preferred because it has an excellent balance of water resistance, detergent resistance, and removability. In addition, α and β other than methacrylic acid and acrylic acid
Ethylenically unsaturated carboxylic acids, such as monocarboxylic acids such as crotonic acid, itaconic acid, maleic acid,
Dicarboxylic acids such as fumaric acid and monoalkyl esters of these dicarboxylic acids, etc., have important properties such as the alkali solubility of the copolymer, the polymerization stability of the monoethylenic monomer, and the gloss, water resistance, and resistance when used as a floor polishing agent. It is not used in the present invention because its detergent properties are poor.
In particular, when a copolymer containing dicarboxylic acid is used, the resulting copolymer has a large particle size, and when used as a floor polishing agent, the gloss is extremely poor and the water resistance is also poor. [A] The carboxyl group-containing alkali water-soluble copolymer (c) contains 5 to 40% by weight of styrene, which is effective in improving workability, gloss, water resistance, and detergent resistance. If styrene is less than 5% by weight, C ₁ ~
When solution polymerizing a copolymer in a _C4 saturated monohydric alcohol, the solution viscosity is high and workability is poor. Also, when used as a floor polish, it has poor water resistance, detergent resistance, gloss and recoatability. If the styrene content is more than 40% by weight, the copolymer will be difficult to dissolve in alkaline water. Furthermore, when used as a floor polishing agent, it economically deteriorates the removability of alkaline cleaners. (d) Among acrylic acid alkyl esters having an alkyl group of _C2 to _C8 and methacrylic acid alkyl esters having an alkyl group of C1 _{to C12} , particularly preferred are ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, It is methyl methacrylate. [A] The glass transition temperature (Tg) of the carboxyl group-containing alkaline water-soluble copolymer is preferably 10 to 100°C, more preferably 20 to 90°C. Tg is 10
If it is lower than °C, the polymerization stability of the monoethylenic monomer will be poor. Furthermore, when used as a floor polishing agent, scratches and stains are likely to occur. When Tg is higher than 100°C, the solution viscosity is high and workability is poor when solution polymerizing a carboxyl group-containing alkali water-soluble copolymer. In addition, when used as a floor polisher, there is a tendency for powdering.
Poor removability with alkaline cleaners. [A] Carboxyl group-containing alkaline water-soluble copolymer was 0.3 dl/g at 30°C in tetrahydrofuran.
It is necessary to have the following intrinsic viscosity. If the intrinsic viscosity is greater than 0.3 dl/g, the polymerization stability of the monoethylenic monomer will be extremely poor, and when used as a floor polishing agent, it will have an adverse effect on leveling properties. The lower limit of the intrinsic viscosity is preferably about 0.1 dl/g. If it is smaller than this, it is not preferable because it tends to cause a decrease in gloss during overcoating and a decrease in detergent resistance. Note that the glass transition temperature (Tg) of the copolymer referred to in this patent is calculated using the following formula (). 1/Tg(c)=W ₁ /Tg ₁ +W ₂ /Tg ₂ +W ₃ /
Tg ₃ + ...... () where W ₁ ; weight fraction of monomer 1 in the copolymer, W ₂ ; weight fraction of monomer 2 in the copolymer,
W ₃ ; Weight fraction of monomer 3 in the copolymer, Tg ₁ ;
Expressed in absolute temperature of homopolymer of monomer 1
Tg, Tg ₂ ; Tg expressed as the absolute temperature of the homopolymer of monomer 2, Tg ₃ ; Tg expressed as the absolute temperature of the homopolymer of monomer 3, Tg(c); absolute of the copolymer Represents Tg expressed in temperature. The Tg of the homopolymer is, for example, polybutadiene -85°C, polystyrene 100°C, polymethyl methacrylate 105°C, polybutyl methacrylate 20°C,
Values such as butyl polyacrylate -55°C, ethyl polyacrylate -24°C, and polymethacrylic acid 185°C are used. [A] The carboxyl group-containing alkaline water-soluble copolymer is produced by solution polymerization because it is easy to obtain a low molecular weight copolymer and polymerization can be carried out without using an emulsifier. In this case, solution polymerization is particularly preferably carried out in C ₁ -C ₄ saturated monohydric alcohols (methyl, ethyl, propyl, butyl alcohol and their isomers), which can be easily handled industrially, and methyl alcohol. If the alcohol has a _C5 or higher, its volatility will be poor and it will have a negative effect on the painted surface. At this time, some ultraviolet absorber may be used to improve the ultraviolet resistance of the conjugated diene. When producing a copolymer, organic peroxide compounds such as benzoyl peroxide, lauryl peroxide, and cumene peroxide, and azo compounds such as azobisisobutyronitrile are used as polymerization initiators. In particular, azobisisobutyronitrile and azobisdimethylvaleronitrile are preferred because they provide a high conversion rate and are easy to handle. Also, conventional chain transfer agents such as tertiary dodecyl mercaptan and 2-ethylhexyl thioglycolate can be used. When the copolymer is used as an emulsifying dispersant, it must be dissolved in an alkaline aqueous solution to have a pH of 7 or higher. As the alkali, aqueous ammonia, sodium hydroxide, potassium hydroxide and amines are used. Particularly preferred are water-resistant, detergent-resistant to volatile ammonia or amines, or mixtures thereof. If the pH of the alkaline aqueous solution of the copolymer is less than 7, the solubility will be poor, and when it is used as an emulsifying and dispersing agent, the polymerization stability of the monoethylenic monomer will be poor, and the particle size of the obtained polymer will be It grows larger and becomes less glossy when used as a floor polisher. The preferred upper limit for PH is about 11. If this value is exceeded, the viscosity tends to become too large. The amount of alkali used is preferably 0.4 to 1.6 equivalents per equivalent of carboxyl group in the copolymer. The viscosity when dissolved in an alkaline aqueous solution is preferably 5 to 5000 cps at a solid content of 20% by weight and 20°C. If the viscosity is outside this range, not only the workability during production but also the leveling of the floor polishing agent will deteriorate, which is not preferable. Next, the amount of [A] carboxyl group-containing alkaline water-soluble copolymer used in the polymerization of [B] monoethylenic monomer is 20 to 80 parts by weight per 100 parts by weight of [B].
Must be parts by weight. The preferred range of [A] is 30 to 60 parts by weight. If the amount of [A] used is less than 20 parts by weight, the polymerization stability of [B] will be poor;
In addition, the particle size of the resulting polymer is too large to be used as a floor polishing agent, resulting in poor gloss, poor removability with alkali cleaners, and at the same time, adhesion to tiles and sleeve resistance are reduced. When the amount of [A] used is more than 80 parts by weight, the viscosity of the polymer dispersion becomes high, and the leveling properties tend to be poor when used in a floor polishing agent. Moreover, recoatability, water resistance, detergent resistance, and scratch resistance are also reduced. [B] is 1 selected from acrylic acid alkyl esters having an alkyl group of C ₂ to C ₈ and methacrylic acid alkyl esters having an alkyl group of C ₁ to C ₁₂
It mainly consists of more than one species of monomer. Preferred examples include ethyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, and methacrylate. In addition, copolymerizable monoethylenic monomers include styrene, acrylonitrile, acrylamide, and methacrylamide. These [B] monomers have a glass transition temperature Tg of the resulting (co)polymer of 20 to 105°C, preferably
Use at a rate that will keep the temperature within the range of 40 to 90°C. this
If Tg is less than 20°C, floor polishing agents tend to cause scratches, and the removability of alkaline cleaners is poor. If the temperature exceeds 105℃, powdering will occur easily. These [B] monoethylenic monomers, [A]
When polymerizing a carboxyl group-containing alkaline water-soluble copolymer as an emulsifying and dispersing agent, the polymerization must be carried out in an aqueous medium with a pH of 7 or higher. When the pH is lower than 7, polymerization stability deteriorates. As the polymerization initiator, persulfates, peroxides such as benzoyl peroxide, azo compounds such as azobisisobutyronitrile, azobisdimethylvaleronitrile, etc. are used. Particularly preferred are azobisisobutyronitrile and azobismethylvaleronitrile, in which case it is usually 0.05 to 100 parts by weight of [B] monoethylenic monomer.
3.0 parts by weight are used. Further, conventional chain transfer agents such as tertiary dodecyl mercaptan and 2-ethylhexyl thioglycolate can also be used. In this invention, [A] a carboxyl group-containing alkali water-soluble copolymer is used as an emulsifying and dispersing agent.
Although the use of ordinary low molecular weight emulsifiers is not preferred for water resistance and detergent resistance, they may be used in small amounts for polymerization stabilizer properties, chemical stability, and particle size control. For example, anionic emulsifiers such as sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, and alkylaryl polyether sulfates, and nonionic emulsifiers such as polyoxyethylene lauryl ether and polyoxyethylene nonylphenol ether are appropriately selected. Can be used. These conventional emulsifiers are used in an amount of 5 parts by weight or less, preferably 3 parts by weight or less, per 100 parts by weight of the monoethylenic monomer (B). Examples of the alkali-soluble resins used in the present invention include colophonium-maleinate resins, silica resins, styrene-maleinate resins, and polyester resins. Further, the waxes used in the present invention include partially synthetic esters (for example, montan wax derivatives), natural waxes (for example, candelia wax, carnaupa wax, honey wax), synthetic waxes (for example, polyethylene wax, microcrystalline wax, Synthetic paraffin-oxidate)
ionic or nonionic emulsions, etc. In addition, commonly used plasticizers, dispersants or emulsifiers, compatibilizers, polyvalent metal compounds, etc. may be added to the floor polishing agent of the present invention as required. Parts and percentages shown in the following examples mean parts by weight and percentages by weight, unless otherwise specified. Example 1 ([A] Preparation of carboxyl group-containing alkaline water-soluble copolymer) In a reactor equipped with a stirrer, a thermometer, and a cooler, 50 parts of methanol was used as a medium, and butadiene, n-butyl acrylate, and methacrylate were added. 100% methyl acid, styrene, and methacrylic acid according to the prescribed amounts in Table-1.
2.0 parts of azobisisobutyronitrile and an appropriate amount of tertiary dodecyl mercaptan were added so that [η] was 0.2 to 0.25 dl/g, and the mixture was reacted at 65°C until the conversion rate was 98% or higher. After pouring the obtained [A] carboxyl group-containing alkaline water-soluble copolymer into water, methacrylic acid
Add 0.8 equivalent of ammonia water and dissolve to reduce solid content to 20
% alkaline aqueous solution (pH 7 or higher) was obtained. ([B] Polymerization of monoethylenic monomer) Using the alkaline aqueous solution of the copolymer obtained above, n-butyl acrylate and methyl methacrylate were charged according to the prescribed amounts in Table 1, and azobis Distilled water was added using 0.3 part of isobutyronitrile so that the total solid content was about 40% after the polymerization reaction, and if necessary, a small amount of aqueous ammonia was added to adjust the pH to 7 or higher. This was polymerized in a reactor at 65° C. for 12 hours to synthesize an aqueous (co)polymer dispersion [C] at a conversion rate of 99% or more. The particle size of this (co)polymer is approximately
It was 500Å. ([D] Preparation of floor polish composition) [D] Floor polish composition was prepared according to the following formulation. [D] Floor polishing agent [C] Aqueous copolymer dispersion (solid content 15%) ^*1
80 parts wax emulsion (solid content 15%) ^*2 15 Alkali-soluble resin (solid content 15%) ^*3 5 Fluorine surfactant (solid content 1%) ^*4 0.5 *1 Each [C] aqueous Tributoxyethyl phosphate/carbitol was added to the copolymer dispersion at a ratio of 1/4 (weight ratio) to set the minimum film forming temperature (MFT) to -6°C. *2 Wax emulsion; Toho Chemical HYTEX
E-4B *3 Alkali-soluble resin; Arco Chemical
Company SMA−2625A (acid value 220, molecular weight
1900 styrene, maleic acid resin) *4 Fluorine surfactant; C ₃ F ₁₇ SO ₂ N
(C ₂ H ₅ )CH ₂ COOK [C] The properties of the aqueous copolymer dispersion and the properties of the [D] floor polish obtained using the dispersion were measured by the following method. (1) Leveling property: Immediately after applying [D] floor polish to half of a 9-inch square black vinyl chloride
Draw a diagonal line. Judgment was made based on the degree to which this line disappeared after drying. ◎ Items that completely disappeared 〇 Items that almost disappeared x Items that remained (2) Water resistance: Apply [D] floor polish twice with a brush on PVC tiles, let it dry, and then remove it after a week. Water was dropped onto the coating, and the coating film was evaluated based on the whitening state after one hour and the whitening state after the water droplets had dried. ◎ No whitening at all ○ Negligible whitening × Significant whitening (3) Detergent resistance: Apply [D] floor polish twice with a brush on vinyl chloride tiles, then dry. After one week, the peeling state of the coating film was evaluated after being worn for 3 minutes while immersed in a 1% solution of household neutral detergent. ◎No peeling at all 〇 Almost no peeling x Significant peeling (4) Gloss (%); Samples similar to (2) and (3)
It was left in a constant temperature and humidity room at 20°C and 60% RH, and evaluated by measuring 60° specular reflection with a gloss meter. (5) Alkaline cleaner removability: Samples similar to (2) and (3) were mixed with (polyoxyethylene nonylphenol ether HLB18.2 = 2 parts, sodium dodecylbenzenesulfonate 5 parts, 28% aqueous ammonia 5 parts). , 88 parts of water), and evaluated based on the peeling state when worn. ◎The paint film is completely peeled off within 1 minute 〇The paint film is 80% peeled off within 1 minute x The paint film is hardly peeled off (6) Scratch resistance and stain resistance; (2) and (3) A similar sample was placed in a high-traffic area for one month and the appearance of scratches and dirt was observed. ◎ Items with almost no scratches or stains 〇 Items with some scratches or stains × Items with a significant amount of scratches or stains (7) Adhesion: Apply floor polishing agent to vinyl tiles or rubber tiles, and after one day apply duct tape to the surface. The state of adhesion between the tile and the paint film was determined by peeling it off at a 90° angle to the painted surface. ◎Completely adhered 〇 Less than 20% peeled × Almost peeled (8) Anti-slip agent; Samples similar to (2) and (3) were installed at the actual walking location. The anti-slip condition at that time was observed. ◎ Highly safe with little slippage ○ Slight slippage but no safety issues x Slippage and safety issues Based on the results in Table 1, 5 to 30% by weight of conjugated diene monomer It can be seen that those using the carboxyl group-containing alkali water-soluble copolymer exhibit adhesion to tiles and slip resistance. Example 2 Each monomer was used in the prescribed amounts shown in Table 2, and 2.0 parts of 2,2'-azobis-(2,4-dimethylvaleronitrile) was used as a polymerization initiator and 2-ethylhexyl thioglycolate was used as a chain transfer agent. In addition to adding
A carboxyl group-containing alkaline water-soluble copolymer was obtained in the same manner as in Example 1. After pouring the obtained carboxyl group-containing alkaline water-soluble copolymer into water, aqueous ammonia containing 1.0 equivalent of carboxylic acid was added and dissolved to obtain an aqueous solution of the copolymer (pH 7 or higher) with a solid content of 20%. Next, this [A] copolymer aqueous solution was used as an emulsifying dispersant, and 2,2'-azobis-
[C] Aqueous polymer dispersion was synthesized in the same manner as in Example 1 except that 0.3 part of 2,4-dimethylvaleronitrile was used. The polymerization conversion rate was 99% or more. [C] Properties of the aqueous polymer dispersion and [D] floor polish obtained using the same were tested in the same manner as in Example 1. The results in Table 2 show that even if the conjugated diene monomer is in the range of 5 to 30% by weight, if the intrinsic viscosity and ST content of [A] are outside the range, the excellent properties of the present invention will not be exhibited. Recognize.

【table】

【table】

【table】

[Table] Example 3 50 parts (in terms of solid content) of [A] carboxyl group-containing alkaline water-soluble copolymer of sample No. 2 in Table 2 of Example 2 was used as an emulsifying dispersant,
[B] selected from 2-ethylhexyl acrylate (2EHA), acrylonitrile (AN), styrene (ST), methyl acrylate (MA), ethyl methacrylate (EMA), acrylamide (AM), and methyl methacrylate (MMA) Emulsion polymerization of 100 parts of a monoethylenic monomer was carried out, and the obtained [C] aqueous polymer dispersion was used to obtain a floor polish according to the preparation of [D] floor polish composition in Example 1. Ta. [B]
Table 3 shows the content of the monoethylenic monomer and the properties of the [D] floor polishing agent.

【table】

Claims (1)

[Claims] 1. In polymerizing [B] using [A] as an emulsifying dispersant, (i) [A] is (a) 5 to 30% by weight of a conjugated diene monomer;
(b) Methacrylic acid and/or acrylic acid 10~
25% by weight, (c) 5-40% by weight of styrene, (d) acrylic acid alkyl ester with an alkyl group of _C2 - _C8 and/or methacrylic acid alkyl ester with an alkyl group of _C1 - _C12 5- 80% by weight
A copolymer obtained by solution polymerizing and in a C ₁ to C ₄ saturated monohydric alcohol, the copolymer has a glass transition temperature of 10 to 100°C and is polymerized in tetrahydrofuran.
20 to 80 parts by weight of an alkaline aqueous solution of a carboxyl group-containing alkali water-soluble copolymer having an intrinsic viscosity of 0.3 dl/g or less at 30°C as a solid content, (ii) [B] is an alkyl group with C ₂ to Acrylic acid alkyl ester which is _C8 , the alkyl group is _C1 - _C12
Using 100 parts by weight of a monoethylenic monomer mainly consisting of one or more monomers selected from methacrylic acid alkyl esters, the glass transition temperature of the produced (co)polymer [B'] is 20 to (iii) in an aqueous medium with a pH of 7 or higher; [D] bed characterized by using the resulting [C] aqueous polymer dispersion, an alkali-soluble resin, and wax; Polishing agent. 2. [A] The floor polishing agent according to item 1, wherein the conjugated diene monomer in the carboxyl group-containing alkaline water-soluble copolymer is 10 to 20% by weight. 3 [A] The intrinsic viscosity of the carboxyl group-containing alkaline water-soluble copolymer is 30°C in tetrahydrofuran.
2. The floor polishing agent according to claim 1, wherein the floor polishing agent has a concentration of 0.1 to 0.3 dl/g. 4 [A] The bed according to item 1, wherein (b) methacrylic acid and/or acrylic acid in the carboxyl group-containing alkaline water-soluble copolymer is 15 to 20% by weight and (c) styrene is 16 to 35% by weight. Polishing agent. 5. The floor polishing agent according to item 1, which uses [A] a carboxyl group-containing alkaline water-soluble copolymer having a glass transition temperature in the range of 20 to 90°C. 6 [A] Carboxyl group-containing alkaline water-soluble copolymer containing ammonia and/or amine in an amount of 0.4 equivalent or more of the carboxyl group, and the viscosity of an aqueous solution with a solid content of 20% by weight is 5 to 5000 cps at 20°C.
2. The floor polishing agent according to item 1, which uses an alkaline aqueous solution of a carboxyl group-containing alkaline water-soluble copolymer having a pH of 7 to 11. 7 [B′] The glass transition temperature of the formed (co)polymer is
2. The floor polishing agent according to item 1, which uses the monoethylenic monomer [B] in the range of 40 to 90°C. 8 [B] The method according to item 1, in which an alkaline aqueous solution of a carboxyl group-containing alkali water-soluble copolymer in an amount of 30 to 60 parts by weight as a solid content based on 100 parts by weight of the monoethylenic monomer is used as an emulsifying dispersant. floor polisher. 9. [A] The floor polishing agent according to item 1, wherein the conjugated diene monomer in (a) is butadiene. 10. The floor polishing agent according to item 1, wherein the acid in [A](b) is methacrylic acid. 11 [A] (d) ester is ethyl acrylate,
2. The floor polishing agent according to item 1, which is at least one selected from n-butyl acrylate, 2-ethylhexyl acrylate, and methyl methacrylate. 12 [B] The floor polishing agent according to item 1, wherein the monoethylenic monomer is at least one selected from ethyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, and methyl methacrylate.