JPH0386775A - Floor polishing emulsion - Google Patents

Abstract

PURPOSE:To obtain the title emulsion which gives a durable coating film improved in uniformity, toughness, the adhesiveness to a base material, and water resistance by the emulsion polymerization of an oil-in-water organopolysiloxane emulsion and a specified monomer mixture. CONSTITUTION:The title emulsion is obtained by the emulsion polymerization of an oil-in-water emulsion (A) of an organopolysiloxane of formula I [wherein R<1>, R<2>, and R<3> are each a 1-20C monovalent (halogenated) hydrocarbon group; Y is an organic group containing a group undergoing radical reaction and/or an SH group; X is H, monovalent lower alkyl or a group of the formula R<1>R<2>R<4> Si (wherein R<1> and R<2> are as defined above; R<4> is R<1> or the same group as Y; is (m) is 10,000 or smaller; and (n) is 1 or greater] and a monomer mixture (B) comprising an alpha,beta-unsaturated monomer (a) and a (meth)acrylic monomer (b) of formula II [wherein R<5> is H or CH3; R<6> is 1-18C (alkoxy-substituted) alkyl] in the presence of a radical polymerization initiator. The obtained emulsion can dispense with the use of waxes hitherto employed and gives a floor polish film improved in uniformity, toughness, the adhesiveness to a base material, and water resistance.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to emulsions for floor polishes.

More specifically, the present invention relates to an emulsion for use in a durable floor polish composition that has improved uniformity, toughness, adhesion to a substrate, and water resistance of the floor polish film.

(Prior Art and Problems to be Solved) Conventionally used floor polish compositions contain polymer vehicles, alkali-soluble resins, waxes, film-forming agents, and other additives (polyvalent metal ion cross-linking agents, wetting agents, etc.). These components are indispensable in order to meet the required performance as a floor polish.

Among these waxes, for example, natural waxes such as carnauba wax, lanolin, and candelilla wax, and synthetic waxes such as polyethylene, polypropylene, and paraffin are used. This affects performance such as reapplicability, puffability, damage resistance, abrasion resistance, and black heel mark resistance. In particular, it lowers the coefficient of friction of the film, improves damage resistance,
It is an important component for increasing black heel mark resistance. However, on the other hand, these waxes do not have true film-forming properties, and have a negative effect on the film-forming properties, toughness, and adhesion to the substrate necessary for a floor polish film, resulting in a decrease in film strength and This causes a decrease in stain resistance, water resistance, and removability, and improvements in these properties have been desired.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a floor as a polymer vehicle that has the useful functions of waxes.
The present invention aims to provide an emulsion for polishing, which eliminates the need for waxes themselves. One or more groups selected from monovalent hydrocarbon groups and monovalent halogenated hydrocarbon groups, and Y is 1 selected from organic groups containing radically reactive groups and/or SR groups. X is a hydrogen atom, a monovalent lower alkyl group, and a group represented by the formula R'R''R'Si (R
1, R2 is the same as above, R4 is the same group as R1 or Y), m is a positive integer less than or equal to io or ooo, and is 1 An oil-in-water emulsion of an organopolysiloxane represented by (BM) α, β unsaturated carboxylic acid monomer (integer greater than or equal to)) and general formula (n
) 6 CHa"C-C0OR' (In the formula, R8 is a hydrogen atom or a methyl group, R6 has 1 carbon number
~18 alkyl group or alkoxy-substituted alkyl group) A floor obtained by emulsion polymerization of a mixture consisting of acrylic and/or methacrylic monomers represented by (18) in the presence of a radical polymerization initiator. - Emulsion for polishing, or (C) an oil-in-water emulsion of organopolysiloxane, which is the component (A), and (D) in addition to the components (a) and (b) of the component (B), c)
Radical polymerization of a mixture consisting of the above a) and a mixed monomer containing one or more monomers selected from copolymerizable ethylenically unsaturated monomers other than component The present invention relates to an emulsion for floor polish obtained by emulsion polymerization in the presence of an initiator.

That is, the present inventors thought that it would be possible to provide the useful performance of waxes to conventional floor polish emulsions (polymer vehicles) and eliminate the need for waxes, and focused on organopolysiloxanes. As a result of extensive research to impart lubricity, rubber elasticity, toughness, film-forming properties, and low-temperature properties, we have added α,β-unsaturated carboxylic acid monomers to organopolysiloxane emulsions that have groups that are reactive with radicals. and a mixed monomer with an acrylic and/or methacrylic monomer represented by the general formula % (R11, R@ are as described above), or other copolymerizable ethylenic monomers. The present invention was completed based on the discovery that if a mixed monomer containing a saturated monomer is added and this mixture is emulsion polymerized, the resulting emulsion has the desired performance.

The present invention will be explained in detail below.

The organopolysiloxane component (A) used in the production of the emulsion of the present invention is represented by the general formula () as described above, where R1, R1, and R3 are methyl, ethyl, propyl, butyl, etc. Monovalent hydrocarbon groups having 1 to 20 carbon atoms, exemplified by aryl groups such as alkyl groups, phenyl groups, tolyl groups, xylyl groups, and naphthyl groups, and some or all of the hydrogen atoms bonded to the carbon atoms of these groups. is selected from the group substituted with a halogen atom, and X is a triorganosilyl group represented by the formula R'R''R'5i (nl, nl are the same as above, R4 is the same group as R1 or Y), It is selected from a hydrogen atom, a lower alkyl group having 1 to 5 carbon atoms such as a methyl group, an ethyl group, a propyl group, a butyl group, and Y is a vinyl group, an allyl group, a γ-acryloxypropyl group, a γ-methacrylic group. It is selected from radically reactive groups such as roxypropyl group and γ-mercaptopropyl group, and SH group-containing organic groups.
A positive integer of 000 or less, and n is an integer of 1 or more, preferably 500<m<8, 000.1<n<5
It is better to be in the range of 00.

Raw materials for producing the organopolysiloxane represented by the general formula (I) include a cyclic organopolysiloxane represented by the formula, a liquid dimethylpolysiloxane whose molecular chain ends are blocked with hydroxyl groups represented by the formula, and a liquid dimethylpolysiloxane represented by the formula ( liquid dimethylpolysiloxane in which both ends of the molecular chain are capped with alkoxy groups (wherein r is a positive integer) and both ends of the molecular chain represented by the formula (in the formula, S=O or a positive integer) Dimethylpolysiloxane blocked with a trimethylsilyl group can also be used as a raw material for introducing a radically reactive group or an SR group with the formula CH.

(In the formula, t = 3..4, 5.6) are exemplified as silanes such as and their hydrolysis products.

In addition, if it is a small amount that does not impede the purpose of the present invention, 3.
Functional trialkoxysilanes and their hydrolysis products can also be used.

The emulsion of the organopolysiloxane represented by the general formula (I) can be produced by following any known method.

One method uses as raw materials a cyclic low-molecular siloxane such as the above-mentioned octamethylcyclotetrasiloxane and a dialkoxysilane compound containing a radically reactive group and/or an SH group and/or a hydrolyzate thereof, A high molecular weight organopolysiloxane is obtained by polymerization in the presence of a strong alkaline catalyst or a strong acidic catalyst, and is then emulsified and dispersed in water in the presence of a suitable emulsifier.

Another method is to use, for example, the above-mentioned low-molecular-weight organopolysiloxane as a raw material and a radical-reactive group and/or
or a dialkoxysilane compound containing an SH group and/or
or a hydrolyzate thereof, and emulsion polymerization in water in the presence of a sulfonic acid surfactant and/or a sulfuric acid ester surfactant. In the case of this emulsion polymerization, similar raw materials are emulsified and dispersed in water with a cationic surfactant such as alkyltrimethylammonium chloride or alkylbenzylammonium chloride, and then an appropriate amount of potassium hydroxide, sodium hydroxide, etc. Polymerization can also be carried out by adding a strong alkaline substance.

Among the methods for producing an emulsion of organopolysiloxane described above, the strong alkaline polymerization catalyst used to obtain a high molecular weight organopolysiloxane in advance is potassium hydroxide, sodium hydroxide, cesium hydroxide, tetramethylammonium hydroxide, and tetrabutyl. Examples of strong acidic polymerization catalysts include phosphonium hydroxide, and sulfuric acid, trifluoromethanesulfonic acid, etc. All of them can be used for subsequent use if they are neutralized to eliminate the catalytic activity after completion of polymerization.

Examples of surfactants for emulsifying the obtained high molecular weight organopolysiloxane include various nonionic polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene alkyl esters, sorbitan fatty acid esters, and polyoxyethylene. Examples include sorbitan fatty acid ester, sucrose fatty acid ester, anionic sodium lauryl sulfate, sodium polyoxyethylene dodecyl sulfate, etc., and cationic alkyltrimethylammonium chloride, alkylbenzylammonium chloride, dialkyldimethylammonium chloride, etc.

In addition, when producing an emulsion of organopolysiloxane by the emulsion polymerization method, the above-mentioned sulfonic acid surfactant and sulfuric acid ester surfactant serve as both an emulsifier and a polymerization catalyst, and include C1oHa l (OCJ4). Examples include lOs03H sodium lauryl sulfate and sodium polyoxyethylene dodecylphenyl sulfate. Among these, sulfuric acid ester salts can function as polymerization catalysts by contacting them with a cation exchange resin after emulsification and converting them into the corresponding acids. After the emulsion polymerization is completed, the surfactant in the acid form may be neutralized to eliminate the catalytic activity. Further, as the cationic emulsifier, the above-mentioned quaternary ammonium salts are mainly used, and after emulsion polymerization, the surfactant in the basic form may be neutralized to eliminate the catalytic activity.

The organopolysiloxane represented by the general formula (I) preferably has a molecular weight as large as possible because if the molecular weight is small, the intended coating film will have poor toughness. Therefore, when emulsifying and dispersing organopolysiloxane obtained by polymerization in advance, it is necessary to have a high molecular weight organopolysiloxane, and when emulsion polymerization is used, the temperature during aging after polymerization must be kept low. Since the molecular weight of the organopolysiloxane increases, the aging temperature is desirably 30°C or lower, more preferably 15°C or lower.

Next, components (B) and (D) will be explained. This is a polymerizable monomer mixture for graft copolymerization with the organopolysiloxane of component (A) above, and (B)
is composed of the following monomer components (A), (D) is (A), (A), (C) is shown below.

Examples of the α,β unsaturated carboxylic acid of component (a) include acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid, and aconitic acid.

U) component is represented by the general formula (II) 6 CH*=C-C0OR@ (R1 and R@ in the formula are the same as above) (meta)
Acrylic monomer [here, the expression (meth)acrylic refers to both acrylic and methacrylic,
The same applies hereinafter], and these include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, isobutyl (meth)acrylate, pentyl (meth)acrylate, and hexyl (meth)acrylate. ) acrylate, octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, stearyl (
Examples include alkyl (meth)acrylates such as meth)acrylate, and alkoxyalkyl (meth)acrylates such as methoxyethyl (meth)acrylate and butoxyethyl (meth)acrylate.

Component c) is an ethylenically unsaturated monomer other than the above that can be copolymerized with the above monomers, and includes aromatic vinyl compounds such as styrene and α-methylstyrene, acrylonitrile, methacrylonitrile, etc. unsaturated nitrile compounds, vinyl esters such as vinyl acetate and vinyl propionate,
Examples include vinyl chloride and vinylidene chloride.

The amount of the above component (a) is preferably 1 to 30% by weight, more preferably 5 to 20% by weight, based on the total amount of component (B). b) If the amount of the component used is less than 1% by weight, the stability during polymerization, the stability of the emulsion when blending the floor polish, the gloss of the floor polish film will decrease, and the removability when recoating will decrease. decreases. If it exceeds 30% by weight, it is not preferable because it causes a decrease in coatability due to an increase in the viscosity of the floor polish formulation and a decrease in the water resistance of the film.

Components a) and c) are the gloss of the floor polish film;
It has a major impact on the performance of floor polish, including strength, water resistance, and adhesion to the substrate.

In order to obtain good performance, the amount of component (i) is preferably 70 to 99% by weight of the total amount of component (B), and the amount of component (c) is preferably 30% by weight or less.

One type or two or more types of components a) to c) are selected from each of them and used in combination, and the glass transition point of the polymer when copolymerized with this monomer mixture is 20°C or higher. It is preferable to design a combination such that the temperature is 40° C. or more, and more preferably a combination that provides a temperature of 40° C. or higher. If the glass transition point is below 20°C, the physical strength of the floor polish film will decrease, resulting in poor durability. In addition, the glass transition point of the polymerized product of the mixed monomer in the examples described later is described in Bull, Am, Phys, S, published in 1956.
ac, Vol. 1, page 123, by the T, G, Fax method.

Next, we will explain the ultimate polymerization of component (A) and component (Bl). First, regarding the ratio of component (A) and component (B), we will explain the ratio of component (A) to 95 parts by weight of component (B). If the organopolysiloxane content is less than 5 parts by weight, the surface smoothness, which is a characteristic of organopolysiloxane polymers, will be poor, and conventional waxes will have poor puffability, damage resistance, abrasion resistance, and black heel mark resistance. It is difficult to impart properties to the polymer according to the present invention, and (B) component 5
If the amount of organopolysiloxane in component (A) exceeds 95 parts by weight, the toughness of the polymer film, adhesion to the substrate, slip resistance, durability, etc. will deteriorate, making it impractical. Therefore, the weight ratio of organopolysiloxane in component (A)/component (B) is 5795 to 9.
515 is preferable.

The emulsion copolymerization of component (A) and component (B) can be carried out by a known emulsion polymerization method using an ordinary radical initiator.

The radical initiators used here include persulfates such as potassium persulfate and ammonium persulfate, water-soluble types such as hydrogen peroxide, t-butyl hydroperoxide, azobisamidinopropane hydrochloride, and benzoyl persulfate. Examples include oil-soluble types such as oxide, cumene hydroperoxide, dibutyl peroxide, diisopropyl peroxydicarbonate, cumyl peroxy neodecanoate, cumyl peroxy octoate, and azobisisobutyronitrile. Further, a redox system can also be used in which a reducing agent such as acidic sodium sulfite, Rongalite, L-ascorbic acid, sugars, amines, etc. is used in combination, if necessary.

In the emulsion copolymerization of (A) fi component and (B) component, since the emulsifier is contained in the emulsion of component (A), it is not necessarily necessary to newly use the emulsifier, but coagulation during polymerization In order to prevent lump formation and improve emulsion stability, a necessary amount of emulsifier may be added. Examples of emulsifiers used here include alkyl or alkylaryl sulfates or sulfonates, alkylaryl succinates, etc. Anionic emulsifiers such as alkyltrimethylammonium chloride, alkylbenzylammonium chloride, etc., polyoxyethylene alkylphenyl ether, polyoxyethylene alkyl ether,
Suitable examples include nonionic emulsifiers such as polyoxyethylene carboxylic acid esters.

A typical formulation for a floor polish composition using the emulsion of the present invention is as follows. The numerical values in the formulation below are the solid content of each component or parts by weight in terms of active ingredient.

(I) Emulsion of the present invention (as polymer content) 100 parts by weight (2) Alkali-soluble resin 0-50 (3) Polyvalent metal ion compound 1-10 // (4) Film-forming aid
O ~ 50〃(5) Wetting agent, stabilizer, antifoaming agent,
0.1~10 1t(6) Ammonia
θ~10〃(7) Water Components (2) to (5) in the above formulation will be described below in an amount that makes the total solid content of the floor polish composition 10 to 40% by weight.

The alkali-soluble resin (2) may be a copolymer of styrene or vinyltoluene and at least one α,β-monoethylenically unsaturated acid or acid anhydride, such as a styrene-maleic anhydride resin, or a polyvalent rosin-maleic anhydride reaction product esterified with alcohol, and C, ~
There are alkali-soluble alkyds that are polyesters of aliphatic dicarboxylic acids with aliphatic polyhydric alcohols that can be modified with glycerol esters of C11+ fatty acids and 08-C4 fatty acids. Other alkali-soluble resins include
These include Manila resins, shellac, alkyl acrylate-shellac copolymers containing sufficient shellac to be alkali soluble.

(3) Polyvalent metal compounds include zinc acetate, cadmium acetate, zinc glycinate, cadmium glycinate,
Examples include zinc carbonate, cadmium carbonate, zinc benzoate, zinc salicylate, zinc glycolate, and cadmium glycolate. Although the polyvalent metal compound can be added to the composition in dry form, such as a powder, it is preferred to first solubilize the polyvalent metal compound using ammonia, amines, and the like.

As the film-forming agent (4), polyhydric alcohols, cellosolves, amino alcohols, and calpitols are used, and preferred examples include ethylene glycol, diethylene glycol heptamethyl ether, diethylene glycol heptamethyl ether, and diethylene glycol heptamethyl ether. High boiling point solvents such as pyrrolidone, benzyl butyl phthalate, dibutyl phthalate, dimethyl phthalate, triphenyl phosphate,
2-Ethylhexylbenzyl phthalate, butylcyclohexyl phthalate, mixture of benzoic acid and fatty acid esters of pentaerythritol, poly(propylene adipate) dipenzoate, diethylene glycol dibenzoate, caprolactam, tetrabutylthiodisuccinate, butyl phthalyl butyl glycolate , acetyl tributyl citrate, dibenzyl sebacate, tricresyl phosphate, toluene ethyl sulfonamide, di-2-ethylhexyl ester of hexamethylene glycol siphthalate, di(methylcyclohexyl) phthalate, tributoxyethyl phosphate, tributyl phosphate, etc. Examples include agents.

The wetting agent, stabilizer, and antifoaming agent in (5) has a carbon number of 12
-18 alkali metal and amine salts of higher fatty acids, such as sodium, potassium, ammonium or morpholine oleate or lysyllate, fluorosurfactants, etc.
Examples include common nonionic surfactants and antifoaming agents commonly used for defoaming emulsions.

(Effects of the Invention) In the emulsion of the present invention, the polymer in the emulsion is composed of a mixed monomer mainly consisting of α, β-unsaturated carboxylic acid and (meth)acrylic acid, and a component having a wax-like function. Since the emulsion of the present invention is chemically bonded by graft polymerization, it eliminates the need for hooks conventionally used as a component of floor polish compositions, and the film formed from the floor polish composition using the emulsion of the present invention. The material is homogeneous, strong, and has good adhesion to the substrate, improving its durability. In addition, since conventional waxes are no longer required, the wax emulsification process is omitted and streamlined, and the harmful effects of emulsifiers used in the wax emulsification process are eliminated, resulting in improved water resistance. Furthermore, the component itself that has wax-like functions is α
Since it has a high acid value due to graft polymerization of β-unsaturated carboxylic acid, re-peelability (removability) of the film was improved and workability was improved. The emulsion of the present invention has good compatibility with conventional emulsions that have been used for the same purpose, and when used together, improves the properties of conventional emulsions.
This makes it possible to form a uniform and tough film.

(Example) Next, the present invention will be specifically explained based on examples.

Note that all parts in the examples represent parts by weight.

Reference Example 1 [Preparation of organopolysiloxane emulsion] 1500 parts of octamethylcyclotetrasiloxane, 19 parts of methacryloxypropylmethylsiloxane and 1500 parts of pure water
15 parts of sodium lauryl sulfate and 10 parts of dodecylbenzenesulfonic acid were added thereto, stirred with a homomixer to emulsify, and then passed twice through a homogenizer at a pressure of 3,000 psi to make a stable emulsion. Ta. After heating this at 70°C for 12 hours, cooling it to 25°C and aging it for 24 hours, the pH of this emulsion was adjusted to 7 using sodium carbonate, and Nm was bubbled in for 4 hours, followed by steam distillation to reduce volatility. The siloxane was distilled off, and then pure water was added to adjust the nonvolatile content to 45%.
A polysiloxane emulsion containing 0.5 mol% of methacrylic groups was obtained (hereinafter abbreviated as E-1).6 In addition, the type and amount of siloxane and aging conditions were changed as shown in Table 1. Polysiloxane emulsions E-2 to E-4 were obtained in the same manner as in the case of E-1.

Example 1 [Manufacture of copolymer emulsion for floor polish] Emulsion E-13 obtained in Reference Example 1 was placed in a reaction vessel equipped with a stirrer, a condenser, a thermometer, and an N2 gas inlet.
After charging 33 parts (79,150 parts of Siloxa) and 567 parts of pure water and adjusting the temperature inside the vessel to 30°C under a N2 gas flow, t-
Add 1.0 part of butyl hydroperoxide, 0.5 part of L-ascorbic acid, and 0.002 part of ferrous sulfate 7-peroxide, and then, while keeping the inside of the vessel at 30°C, 210 parts of methyl methacrylate, acrylic acid. A mixture of 90 parts of butyl and 50 parts of methacrylic acid was added dropwise over 3 hours, and after the addition was completed, stirring was continued for another 1 hour to complete the reaction. The resulting copolymer emulsion (hereinafter abbreviated as pt) had a solid content concentration of 39.8% and a calculated glass transition point of the polymerized material such as (meth)acrylic monomers of 53.5°C. Ta.

In the same manner as above, the types and amounts of polysiloxane emulsions and (meth)acrylic monomers shown in Table 2 were copolymerized to form copolymerized emulsions P-2 to P-2 with a solid content concentration of 39 to 40%. -5 was obtained.

The numbers in parentheses in the above table represent the polysiloxane content. Example 2, Comparative Example 1 [Performance evaluation] Copolymer emulsions P-1 to P-5 obtained in Example 1
Using each alone, the floor with the following formulation A.
Floor polish formulations 1 to 5 corresponding to each copolymer emulsion were obtained. The results of performance evaluation of these formulations are shown in Table 3.

In addition, as Comparative Example 1, emulsion polymerization was carried out using the same (meth)acrylic monomer composition as in Example 1 in a conventional manner without using a polysiloxane emulsion (solid content 18%). 40
%, weight average molecular weight 440,000, diluted with water to 32% solids and formulated into a floor polish according to conventional formulation B below to obtain Floor Polish Formulation 6. Ta. The results of the performance evaluation of this formulation are shown in Table 3.

Blending Formula B Polyethylene Wax Emulsion, manufactured by Div. Performance evaluation of the floor polish formulations obtained according to the above Blending Formula A or B was carried out as follows.

Each of black and white asbestos tiles with a size of 303 mm square was coated with 2 cc of the compound twice, and after the first application, the test pieces were left to stand for 24 hours (drying in a room for 30 minutes). The recoatability was evaluated at the time of coating.

(b) Gloss Judgment was made by two-eye inspection.

(b) Adhesion: Cellotape was pressed and the state of the coating film was judged when peeled off at 90 degrees.

(c) Water resistance (2) Determined according to the method specified by the Japan Floor Borish Industry Association. (Drop distilled water onto the test piece and cover with a cover glass. After 30 minutes, remove the cover glass and absorb the water with filter paper. Visually judge the whitening state of the test piece after leaving it for 1 hour.) (d) Black resistance Heel mark property: The degree of staining was determined by tapping strongly with the heel of the shoe.

(f) Repeatability: Judging by visual inspection.

Performance display: Good 0 ~ ○ ~ Δ ~ × Bad No. table

Claims (1)

[Claims] 1. (A) General formula (I) ▲There are mathematical formulas, chemical formulas, tables, etc.▼ [In the formula, R^1, R^2, and R^3 each have a carbon number of 1 to
Y is one or more groups selected from 20 monovalent hydrocarbon groups and monovalent halogenated hydrocarbon groups, and Y is selected from organic groups containing radical reactive groups and/or SH groups. one or more groups, X is a hydrogen atom, 1
a lower alkyl group and a group represented by the formula R^1R^2R^4Si (R^1 and R^2 are the same as above, and R^4
is the same group as R^1 or Y), m is a positive integer of 10,000 or less, and n is an integer of 1 or more]. Oil-in-water emulsion of organopolysiloxane and (B) a) α, β unsaturated carboxylic acid monomer b) General formula (II) ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (In the formula, R^5 is hydrogen or a methyl group, and R^6 is an alkyl group having 1 to 18 carbon atoms or an alkoxy-substituted alkyl group). An emulsion for floor polish obtained by emulsion polymerization in the presence of an agent. 2. (C) Copolymerization of component (A) according to claim 1 and (D) component (B) according to claim 1, in addition to components a) and b), and c) components other than components a) and b) above. and a mixed monomer containing one or more monomers selected from possible ethylenically unsaturated monomers, obtained by emulsion polymerization in the presence of a radical polymerization initiator. Emulsion for floor polish.