JPH04225065A - Production of emulsion for aqueous floor polishing composition - Google Patents

Abstract

PURPOSE:To obtain the subject emulsion excellent in resistance to black heel marks and scuffing by carrying out condensing reaction of an alkoxysilane compound in the presence of a specific (meth)acrylic copolymer emulsion. CONSTITUTION:The objective emulsion is obtained by carrying out condensing reaction of (B) an alkoxysilane compound such as tetramethoxysilane in the presence of (A) 100 pts.wt. (expressed in terms of solid content) copolymer emulsion prepared by polymerizing monomers containing (i) 30-85wt.% (preferably 30-65wt.%) alkyl (meth)acrylate having a 1-10C alkyl group, (ii) 1-30wt.% (preferably 5-25wt.%) ethylenically unsaturated carboxylic acid composed of preferably (meth)acrylic acid and (iii) 0-60wt.% (preferably 10-55wt.%) aromatic vinyl compound composed of preferably styrene.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a method for efficiently and easily producing an emulsion for an aqueous floor gloss composition in which a polymer of an alkoxysilane compound having excellent black heel mark resistance and scuff resistance is composited. .

0002

[Prior Art] Conventionally, water-based floor gloss compositions made of acrylic polymers have been used to give gloss to building floors, etc., but conventional compositions lack black heel mark resistance, scuff resistance Therefore, if you want to maintain the beauty of the floor at a high level, you have to increase the frequency of maintenance, making it impossible to meet the recent demand for labor saving.

On the other hand, as a method for improving the performance of an aqueous floor gloss composition, as proposed in JP-A-55-110170, an alkoxysilane compound is allowed to coexist with an acrylic monomer, etc. It has been shown that an aqueous floor gloss composition made of a polymer obtained by polymerization with an acrylic monomer has excellent recoatability and gloss. However, this method has the problem of poor polymerization stability and the inability to use large amounts of alkoxysilane compounds.

Another possible method is to add polysiloxane to an aqueous floor gloss composition made of an acrylic polymer, but this method has insufficient compatibility between the acrylic polymer and polysiloxane. Insufficient performance.

[0005]

[Problems to be Solved by the Invention] The present invention eliminates problems in the use of polysiloxane such as poor compatibility with acrylic polymers and deterioration of polymerization stability, and improves black heel mark resistance and scuff resistance. The purpose of the present invention is to provide an emulsion for an aqueous floor gloss composition that can maintain high levels of hardness and abrasion resistance.

[0006]

[Means for Solving the Problems] The present invention provides (a) 30 to 85% by weight of (meth)acrylic acid alkyl ester whose alkyl group has 1 to 10 carbon atoms, (b) 1 to 85% by weight of an ethylenically unsaturated carboxylic acid. In the presence of 100 parts by weight (in terms of solid content) of a copolymer emulsion obtained by polymerizing a monomer containing 30% by weight and (c) 0 to 60% by weight of an aromatic vinyl compound, 0 parts by weight of an alkoxysilane compound . 1 to 500 parts by weight are subjected to a condensation reaction.

The present invention will be explained in detail below. As the (meth)acrylic acid alkyl ester having an alkyl group having 1 to 10 carbon atoms, which is component (a) of the monomer used in the production of the copolymer emulsion, for example, (meth) ) Methyl acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, i-propyl (meth)acrylate, n-butyl (meth)acrylate, i-butyl (meth)acrylate, (meth) ) n-amyl acrylate, i-amyl (meth)acrylate, hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, i-nonyl (meth)acrylate, (meth)
Decyl acrylate, hydroxy (meth)acrylate,
Hydroxyethyl (meth)acrylate, preferably methyl (meth)acrylate, n-(meth)acrylate
Examples include butyl, 2-ethylhexyl (meth)acrylate, and ethyl (meth)acrylate. These (meth)acrylic acid alkyl esters can be used alone or in combination of two or more.

These (meth)acrylic acid alkyl esters are essential components for imparting water resistance, weather resistance and adhesion to the obtained copolymer emulsion, and (a
The amount of component ) used is 30 to 85% by weight, preferably 30 to 65% by weight of the total monomers. If the amount used is less than 30% by weight, water resistance, weather resistance and adhesion will be poor, which is not preferable.

[0009] Examples of the ethylenically unsaturated carboxylic acid as component (b) include itaconic acid, (meth)acrylic acid, fumaric acid, maleic acid, and crotonic acid, preferably (meth)acrylic acid. It is. These ethylenically unsaturated carboxylic acids may be used alone or in combination of two or more. This ethylenically unsaturated carboxylic acid is an essential component for imparting alkali removal properties to the copolymer emulsion and for maintaining a high level of balance between polymerization stability and water resistance of the resulting copolymer emulsion. The amount of component (b) used is 1 of the total monomers.
-30% by weight, preferably 5-25% by weight. If the amount used is less than 1% by weight, polymerization stability and water resistance will decrease, and if it exceeds 30% by weight, leveling properties will be poor.

Examples of the aromatic vinyl compound as component (c) include styrene, α-methylstyrene, paramethylstyrene, vinyltoluene, etc., with styrene being preferred. These aromatic vinyl compounds are 1
The species can be used alone or two or more species can be used in combination.

The aromatic vinyl compound is a component that imparts water resistance to the copolymer emulsion and gloss to the resulting aqueous floor gloss composition. (c) The amount of component used is 0 to
60% by weight, preferably 10-55% by weight. If the amount used exceeds 60% by weight, the black heel mark resistance and scuff resistance will deteriorate, which is not preferable.

Furthermore, in the present invention, the above (a) and (b)
Other monomers copolymerizable with component (c) include ethylenically unsaturated carboxylic acid alkylamides such as (meth)acrylamide and N-methylolacrylamide; carboxylic acid vinyl esters such as vinyl acetate and vinyl propionate. ; Acid anhydrides, monoalkyl esters, and monoamides of ethylenically unsaturated dicarboxylic acids; Aminoalkyl esters of ethylenically unsaturated carboxylic acids such as aminoethyl acrylate, dimethylaminoethyl acrylate, butylaminoethyl acrylate; aminoethyl acrylamide, dimethyl Aminoalkylamides of ethylenically unsaturated carboxylic acids such as aminomethylmethacrylamide and methylaminopropylmethacrylamide; (
Vinyl cyanide monomers such as meth)acrylonitrile and α-chloroacrylonitrile; unsaturated aliphatic glycidyl esters such as glycidyl (meth)acrylate, and the like can further be used. (Hereinafter, these other monomers will be referred to as component (d).) These other monomers may be used alone or in combination of two or more. The amount of these other monomers used is 0 to 69% by weight of the total monomers, and if it exceeds 69% by weight, the amounts of the components (a) and (b) will decrease, and the water resistance and Adhesion and leveling properties are poor, making it undesirable.

The copolymer emulsion of the present invention is obtained by emulsion polymerization of a specific proportion of the above monomers using a known emulsifier, polymerization initiator, etc. Here, the emulsifier includes anionic emulsifiers such as sodium dodecylbenzenesulfonate, sodium lauryl sulfate, sodium diphenyl ether disulfonate, and sodium dialkyl ester sulfonate, or nonionic emulsifiers such as polyoxyethylene alkyl ester and polyoxyethylene alkyl allyl ether. One or more emulsifiers may be used.

The amount of emulsifier used is usually 0 based on the total monomers.
．． It is 2 to 4% by weight, preferably 0.5 to 3% by weight. If the amount used is less than 0.2% by weight, it is not preferable because polymerization stability deteriorates such as the formation of coagulates, which hinders the production of copolymer emulsions.On the other hand, if it exceeds 4% by weight, water resistance and weather resistance deteriorate. This is not preferable because it reduces the

Examples of the polymerization initiator include persulfate initiators such as potassium persulfate, sodium persulfate, and ammonium persulfate, or inorganic initiators such as hydrogen peroxide, cumene hydroperoxide, and isopropylbenzene hydroperoxide. Examples include organic initiators such as organic peroxides such as para-menthane hydroperoxide, and azo initiators such as azobisisobutyronitrile. The amount of this polymerization initiator used is
Usually 0.03 to 2% by weight based on the total monomers, preferably 0
．． 05 to 1% by weight.

Furthermore, during emulsion polymerization, in addition to the emulsifier and polymerization initiator, various chain transfer agents,
Chelating agents, pH adjusters, electrolytes, etc. can also be used in combination. The water used during emulsion polymerization has a total monomer content of 10
The amount is usually 80 to 300 parts by weight relative to 0 parts by weight, and water and the emulsifier, polymerization initiator, etc. are used in amounts within the above ranges, and the polymerization temperature is 10 to 90°C, preferably 40 to 85°C.
, emulsion polymerization is carried out under polymerization conditions with a polymerization time of 1 to 30 hours. The method of adding the monomer is not particularly limited, and any method such as a batch addition method, a continuous addition method, or a divided addition method may be employed.

The final polymerization conversion rate of the copolymer emulsion is preferably 90 to 100% by weight, particularly 95 to 100% by weight. In addition, when seed polymerization is adopted, a polymer obtained by emulsion polymerization of monomers consisting of components (a) to (d) in advance is used as seed particles,
A monomer mixture consisting of components (a) to (d) may be added to this to carry out emulsion polymerization.

In the present invention, the glass transition temperature of the copolymer component of the copolymer emulsion determined by differential thermal analysis is as follows:
It is usually -10 to 150°C. This glass transition temperature is −
If it is less than 10°C, the black heel mark resistance as an aqueous floor gloss composition will be poor, and if it exceeds 150°C, the adhesion to the floor material will be poor, and furthermore, the film forming property will be poor, which is not preferable.

The present invention is characterized in that an alkoxysilane compound is subjected to a condensation reaction in an aqueous dispersion medium in the presence of the copolymer emulsion obtained as described above. The alkoxysilane compound used in the present invention is represented by the formula RnSi(OR')4-n. In the formula, R is an organic group having 1 to 8 carbon atoms, such as an alkyl group such as a methyl group, an ethyl group, an n-propyl group, an i-propyl group, or other γ
-chloropropyl group, vinyl group, 3,3,3-trifluoropropyl group, γ-glycidoxypropyl group, γ-methacryloxypropyl group, γ-mercaptopropyl group,
Examples include phenyl group, 3,4-epoxycyclohexylethyl group, and γ-aminopropyl group.

In the above formula, R' is an alkyl group having 1 to 5 carbon atoms or an acyl group having 1 to 4 carbon atoms, such as methyl group, ethyl group, n-propyl group, n-butyl group,
Examples include sec-butyl group, tert-butyl group, and acetyl group. If the number of carbon atoms in R or R' in the formula is too large, the water solubility will decrease and the absorption rate of the alkoxysilane compound to the copolymer emulsion as a seed will decrease, which is not preferable. Furthermore, n is 0-3.

Specific examples of these alkoxysilane compounds include tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetrabutoxysilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, n-propyltrimethoxysilane, n-propyltriethoxysilane, i-propyltrimethoxysilane, i-propyltriethoxysilane, γ-chloropropyltrimethoxysilane, γ-chloropropyltriethoxysilane, vinyltrimethoxysilane, vinyl Triethoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, 3,3,3-trifluoropropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane,
γ-methacryloxypropyltrimethoxysilane, γ
-methacryloxypropyltriethoxysilane, γ-
Mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, γ-aminopropyltrimethoxysilane, 3,4-epoxycyclohexylethyltrimethoxysilane, 3,4-epoxycyclohexylethyl Examples include triethoxysilane, dimethyldiethoxysilane, dimethyldimethoxysilane, etc., and preferred examples include tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, dimethyldimethoxysilane, etc. It is.

These alkoxysilane compounds have 1
The species can be used alone or in combination of two or more, and can also be used in combination with other metal alkoxides such as titanium and aluminum. Further, a known silane coupling agent can be used in combination as necessary. Furthermore, these alkoxysilane compounds can be used after being dissolved in an organic solvent, if necessary.

The aqueous dispersion medium used in the present invention can contain water alone or ketones, lower alcohols, esters, etc. that mix well with water. These organic solvents can be used in an amount of 0 to 45% by weight based on water, but in order to maintain a good dispersion state of the copolymer emulsion, they should be used in an amount of 20% or less, preferably 5% by weight or less.
It is desirable to use it in a proportion of less than % by weight.

[0024] In the present invention, the alkoxysilane compound added to the copolymer emulsion may be condensed without being absorbed into the copolymer emulsion particles; In order to obtain an emulsion, it is preferable that the copolymer is absorbed into emulsion particles and condensed. In this case, the alkoxysilane compound is preferably 5% by weight or more, more preferably 10% by weight of all the alkoxysilane compounds used.
Above, particularly preferably 30% by weight or more.

In the present invention, the alkoxysilane compound can be easily absorbed into the copolymer emulsion particles by adding the alkoxysilane compound to an aqueous dispersion in which the copolymer emulsion is dispersed and stirring well. will be achieved. In order to easily and efficiently absorb the alkoxysilane compound into the copolymer emulsion particles, if necessary, the solubility in water is 10-3.
It is also possible to previously absorb up to % by weight of the solvent into the copolymer emulsion.

The condensation reaction of the alkoxysilane compound absorbed into the copolymer emulsion particles can be easily controlled by changing the reaction temperature and hydrogen ion concentration, and the degree of polymerization of the polysiloxane can be controlled. The condensation reaction of the alkoxysilane compound can be carried out at a temperature of 30°C or higher, preferably 50°C or higher, more preferably 70°C or higher. The hydrogen ion concentration is usually pH 4 to 10, preferably pH 5 to 9, and more preferably pH 6 to 8.

The amount of the alkoxysilane compound used in the present invention is 0.1 to 500 parts by weight, preferably 0.5 parts by weight, based on 100 parts by weight (in terms of solid content) of the copolymer emulsion defined in the present invention. ~100 parts by weight, more preferably 1 to 50 parts by weight, particularly preferably 5 to 50 parts by weight. If the amount used is less than 0.1 parts by weight, there will be no effect of improving black heel mark resistance, and if it exceeds 500 parts by weight, film forming properties will deteriorate, costs will increase, and the finish of the coating will deteriorate, resulting in poor black resistance. The effect of improving heel mark property and scuff resistance cannot be obtained.

The solid content concentration of the emulsion for an aqueous floor gloss composition of the present invention is usually adjusted to 10 to 65% by weight, preferably 30 to 60% by weight. If the solid content concentration is less than 10% by weight, productivity decreases, the solid content concentration in the aqueous floor gloss composition decreases, and coating workability decreases. Moreover, if it exceeds 65% by weight, problems such as an increase in the viscosity of the emulsion and a deterioration in polymerization stability occur.

[0029] The aqueous floor gloss composition usually contains (a) the copolymer emulsion of the present invention, (b) a wax, and (c) an alkali-soluble resin as main components, and (d) a wetting agent, an emulsifier, and a dispersant. , (e) polyvalent metal compound, (e)
It can be obtained by adding water and the like as necessary. In this,
(a) The copolymer emulsion of the present invention is the main component of the aqueous floor gloss composition and forms a continuous film on the floor surface to protect the floor surface and maintain its aesthetic appearance. It functions as a binder for the ingredients. (b) Natural or synthetic waxes are usually used as the wax, such as beeswax, carnauba wax, candelilla wax, polyethylene wax, paraffin wax, etc., which are emulsified and dispersed with an ionic or nonionic emulsifier. ing. The role of such wax is to alleviate the impact applied to the paint film and provide self-repairing properties for damage caused to the paint film.

(c) The alkali-soluble resin functions to improve the leveling of the aqueous floor gloss composition as well as its releasability. Such alkali-soluble resins include styrene-maleic acid copolymer resin, shellac,
Examples include rosin-modified maleic acid resin. (d) Wetting agents, emulsifiers, and dispersants are used to improve the dispersion stability of the resulting aqueous floor gloss composition and the wetting of the composition with the floor surface, and are higher fatty acids having 12 to 18 carbon atoms. Mention may be made of alkali metal and amine salts such as sodium, potassium, ammonium, and nonionic surfactants. Furthermore, (e) when the polyvalent metal compound is added to the composition, a tough coating film can be obtained due to the crosslinking effect, and good black heel mark resistance and scuff resistance can be obtained. Such polyvalent metal compounds include, for example, oxides and salts of zinc, zirconium, magnesium, calcium, aluminum, etc. dissolved in acids such as carbonic acid and acetic acid;
Alternatively, they can be easily obtained by adjusting the pH of an aqueous solution of these acids and salts of polyvalent metals to 7 to 11 with ammonia, amines, etc., and can also include those in the form of metal ions. .

The usual amounts of these components (b) to (e) are as follows, per 100 parts by weight (in terms of solid content) of the copolymer emulsion (a). (b) Wax
5 to 40 parts by weight (c) Alkali-soluble resin
0 to 50 parts by weight (d) Wetting, emulsifying and dispersing agent 0.05 to 15 parts by weight (e) Polyvalent metal compound 0.01 to 10 parts by weight (f) Water The total solid content is 8 to 45% by weight. amount

[0032]

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited thereto. Examples 1-4
, Comparative Examples 1 to 5 (1) Glass reaction vessel with stirrer (capacity 3 liters)
A condenser, a thermometer, and a dropping funnel were attached to the tank, and 100 parts by weight of deionized water, 1 part by weight of sodium lauryl sulfate, and 0.5 parts by weight of ammonium persulfate were charged, and after replacing the air inside with nitrogen, the internal temperature was adjusted while stirring. The temperature was raised to 65°C and dissolved, and in a separate container, 50 parts by weight of deionized water, 1 part by weight of sodium lauryl sulfate, and the monomers shown in Table 1 were mixed and stirred to form an emulsion, which took 3 hours. Continuously dripped. During the dropwise addition, the reaction was carried out at 80° C. while introducing nitrogen. After the addition was completed, the mixture was further stirred at 85°C for 2 hours, and then
The reaction was completed by cooling to .degree. C. to obtain copolymer emulsions (a) to (f). The polymerization conversion rates of the obtained copolymer emulsions (a) to (f) were all 98% by weight or more. Further, no generation of coagulum was observed. (2) The pH of the system was adjusted to 7 with sodium hydroxide while maintaining the temperature at 25°C, and the alkoxysilane compounds shown in Table 1 were added, followed by stirring for about 1 hour. after that,
The temperature of the reaction container was raised to 80° C., and the reaction was carried out for 3 hours to obtain emulsions (A) to (I) for aqueous floor gloss compositions.

Comparative Example 6 (1) 50 parts by weight of deionized water was placed in a glass reaction vessel equipped with a stirrer, 0.5 parts by weight of sodium lauryl sulfate and 10 parts by weight of methyltriethoxysilane were added, and the mixture was stirred thoroughly. The temperature was raised to 65°C and the reaction was carried out for 3 hours to obtain a polysiloxane emulsion. (2) A copolymer emulsion (T) prepared in the same manner as in Example 4, except that the amount of deionized water charged into the glass reaction vessel equipped with a stirrer was changed to 50 parts by weight, was adjusted to pH 7, and then added to the above ( The polysiloxane emulsion obtained in step 1) was mixed to obtain an emulsion for aqueous floor gloss composition (J).
I got it.

Comparative Example 7 A copolymer emulsion was polymerized in the presence of an alkoxysilane compound in the same manner as in Example 4, except that the alkoxysilane compound was mixed with the monomer of the copolymer emulsion, and an aqueous floor gloss composition was prepared. A commercial emulsion (K) was obtained. The polymerization conversion rates of the resulting aqueous floor gloss composition emulsions (K) were all 98% by weight or more. However, a lot of coagulum was observed.

Preparation of aqueous floor gloss composition Using the emulsions (A) to (J) for aqueous floor gloss compositions obtained in Examples 1 to 4 and Comparative Examples 1 to 6, aqueous floor gloss composition was prepared according to the following formulation. The composition was prepared. Aqueous Floor Gloss Composition Prescription Emulsion for Aqueous Floor Gloss Composition *1 80 parts by weight Polyvalent metal compound *2 3.5 parts by weight Wax emulsion *3 15 parts by weight Alkali-soluble resin *4 5 parts by weight Fluorine surfactant * 5 0.5 part by weight *1
A film-forming agent mixed in a ratio of tributoxyethyl phosphate/carbitol = 1/4 (weight ratio) was added to the emulsion for the aqueous floor gloss composition, the minimum film-forming temperature was adjusted to 5°C, and the film-forming agent was further removed. Add ionized water to make solid content 15% by weight
Adjusted to. *2 Polyvalent metal compound ZnO 14% by weight Ammonium carbonate 12% by weight Aminoacetic acid 20% by weight Aqueous ammonia
A mixture of 30% by weight and 100% by weight deionized water. *3 Wax emulsion; Toho Chemical HYTEC
E-4B solid content was adjusted to 15% by weight. *4 Alkali-soluble resin; ARCO Chemi
cal CompanySMA-2625A (acid value 2
20, styrene with a molecular weight of 1900. Maleic acid resin) The solid content was adjusted to 15% by weight. *5 Fluorine surfactant; Sumitomo 3M FC-12
9 solid content was adjusted to 1% by weight.

Evaluation of the aqueous floor gloss composition was carried out by the following method. 10 g of the aqueous floor gloss composition is applied on the black heel mark resistant homogeneous style and then dried. Repeat this three times to prepare a sample. The sample was placed in a high traffic area for 10 days, and the degree of adhesion of the black heel mark was observed. ○ Almost no BHM adhesion △ Slight amount of BHM adhesion × Items with a lot of BHM adhesion Samples were prepared in the same manner as the scuff resistance black heel mark evaluation.
The scale was installed and the extent of scuffing was observed. ○ Items with almost no scuffing △ Items with some scuffing × Items with a lot of scuffing

A sample was prepared in the same manner as in the evaluation of the glossy black heel mark, and the 60° reflection of the sample was measured using a Murakami glossmeter. 1/1 water-based floor gloss composition on leveling homogeneous style
Apply 0g, immediately draw a diagonal line in an X shape, and then dry. Repeat this three times to prepare a sample. After drying, the degree of disappearance of this line was evaluated. ○ completely disappeared △ almost disappeared × remained show.

[0038]

[Table-1]

Emulsion for aqueous floor gloss composition (
Among A) to (K), (A) to (D) belong to the present invention, and (E
) to (K) do not belong to the present invention. Example 1
-4 are examples of aqueous floor gloss compositions using emulsions for aqueous floor gloss compositions within the scope of the present invention, and the aqueous floor gloss compositions targeted by the present invention are obtained. Comparative example 1 is
The amount of the alkoxysilane compound used is less than the range of the present invention, and the black heel mark resistance and scuff resistance are poor. Comparative Example 2 is an example in which the amount of the alkoxysilane compound used exceeds the range of the present invention, and the gloss is reduced and the black heel mark resistance and scuff resistance are poor. In Comparative Example 3, the amount of ethylenically unsaturated carboxylic acid was less than the range of the present invention, and the black heel mark resistance was poor. Comparative Example 4 is an example in which the amount of ethylenically unsaturated carboxylic acid exceeds the range of the present invention, and the leveling property is poor. Comparative Example 5 is an example in which the aromatic vinyl compound exceeds the scope of the present invention, and the black heel mark resistance and scuff resistance are significantly inferior. Comparative Example 6 is a simple blend of a polysiloxane emulsion and a copolymer emulsion, and is poor in leveling properties, black heel mark resistance, and scuff resistance. Comparative Example 7 is an example in which an alkoxysilane compound was mixed with a monomer component of a copolymer emulsion and subjected to emulsion polymerization, but there were many coagulates generated during polymerization, making it impossible to evaluate it as an aqueous floor gloss composition. Ta. Moreover, if a large amount of coagulum occurs, productivity will decrease.

[0040]

Effects of the Invention According to the production method of the present invention, a high-performance emulsion for a water-based floor gloss composition with good black heel mark resistance and scuff resistance can be easily and efficiently obtained, and the emulsion for use in floor gloss compositions in question can be easily and efficiently obtained. This makes it possible to reduce maintenance and has extremely great industrial value.

[0042]

Claims (1)

[Claims] Claim 1: (a) an alkyl group having 1 to 10 carbon atoms (
30-85% by weight of meth)acrylic acid alkyl ester,
Copolymer emulsion 10 obtained by polymerizing monomers containing (b) 1 to 30% by weight of an ethylenically unsaturated carboxylic acid and (c) 0 to 60% by weight of an aromatic vinyl compound
1. A method for producing an emulsion for an aqueous floor gloss composition, which comprises subjecting 0.1 to 500 parts by weight of an alkoxysilane compound to a condensation reaction in the presence of 0 parts by weight (based on solid content).