JP3473457B2 - Flame retardant coating waterproofing composition - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
A flame-retardant coating film waterproofing composition that has both performance and flame retardancy
And widely used in civil engineering and construction technology fields.
It can be. 2. Description of the Related Art Conventionally, waterproofing of a structure is excellent in weather resistance.
Consisting of an alkyl acrylate polymer emulsion
Many coating film waterproofing compositions are used. These coatings
The performance required for a water composition includes waterproofing of buildings and
From the point of view, it has the ability to follow underground cracks,
Does not decrease even at low temperatures such as winter, and
During warming, dripping occurs and strength decreases.
No coating, no stickiness and excellent gloss,
Excellent water resistance, chemical resistance, UV resistance and ozone resistance
It is mentioned. On the other hand, due to the overcrowding of the living environment,
In view of this, making materials flame-retardant has been
Has been requested. For example, the law on the use of flame retardant materials
Examples of regulations include theaters, public halls, hospitals and department stores.
Where many people come and go, such as non-combustible materials,
Use of non-combustible and flame-retardant materials is subject to the Building Standards Law.
It has been established that fire protection for construction
Material Certification No. 0003, 0004 and 0005
For example, flame retardancy has become mandatory. [0004] In a coating film waterproofing composition, the flame retardancy is reduced.
Although there are no special regulations, facilities handling hazardous materials
Then, the Dangerous Goods Notice of the Fire and Disaster Management Agency "Holding the outdoor storage tank
Criteria for the flame retardancy of urethane foam
To pass the flame retardancy test
It is anticipated that this tendency will become stronger in the future.
Imagine. However, it is difficult to obtain from the conventional coating film waterproofing composition.
Many of the coatings that are burned are flammable,
Various methods have been studied for imparting. [0005] The main method is that the waterproofing composition is difficult.
Method of blending a flame retardant, method of blending a nonflammable inorganic filler
For making the polymer that constitutes the waterproofing and waterproofing composition itself flame-retardant
And the like. [0006] As a method of blending a flame retardant, a known method is used.
-Chloropentacyclodecane, tris (chloromonopro
Pill) phosphate, hexabromobenzene and tri
Halogens such as di (chlorobromopropyl) phosphate
Liquid flame retardant such as phosphorus compounds and dicumyl peroxide
Waterproofing agent and inorganic flame retardant such as antimony trioxide
There is a method of compounding the composition. However, liquid flame retardants
When blended, long-lasting flame retardants escape over time.
It is difficult to impart flame retardancy to the coating film over a period of time.
The strength and gloss of the coating film are reduced and the cost is higher
Problem, etc., and blended with inorganic flame retardant
If the flame retardant does not escape,
Insufficient elongation of the paint film to be applied
Was inadequate. As a method of blending a nonflammable inorganic filler,
Contains calcium carbonate, silica sand, etc., which can be obtained at low cost.
However, these inorganic substances are difficult to mix unless they are mixed in large quantities.
Most of them do not have flammability, and also reduce the amount of smoke
The main purpose is that the flame retardancy itself is weak. Change
In addition, the resulting coating film contains a large amount of the above-mentioned inorganic substances.
As a result, the elongation of the coating film decreases, and as a waterproofing composition
It has the problem of being unusable.
Was. [0008] The method of making the polymer itself flame-retardant is flammable.
Flame retardancy by replacing the polymer with a more flame retardant polymer
Copolymerization of halogen-based monomer
Method of using a polymer or blending a halogen-based polymer
However, the flexibility of the coating film is poor, and like the coating waterproofing material,
This includes flexibility at low temperatures and followability to cracks in the substrate.
Also, can not be used for applications that require high elongation performance
Was. SUMMARY OF THE INVENTION The present inventors have set forth the above-mentioned section.
Vinylidene chloride monomer as a waterproofing composition to solve the problem
(Meth) acrylic copolymer obtained by copolymerizing
(Meth) acrylic copolymer and vinylidene chloride-based polymerization
Flame-retardant coating consisting of a compound having a triazine ring
A composition for waterproofing has been found (Japanese Patent No. 2669011).
Publication) However, the composition contains vinyl chloride as a constituent component.
In the event that the coating burns because it contains redene,
Because harmful substances may be generated, vinylidene chloride
Demand for waterproofing compositions that do not use halogen-based polymers
It is getting to be. Also, the constituent component vinylidene chloride
Over time, the weather resistance of the coating film
The property was reduced. The present inventors have proposed a halogen-based monomer or polymer.
Excellent safety without using coalescing
The film is flame-retardant, the coating film is formed quickly, and the coating film is weather resistant
Protection such as strength, strength, flexibility, water resistance and alkali resistance
A flame retardant coating waterproofing group with excellent performance required for water materials
They worked diligently to find a product. Means for Solving the Problems [0011] The present inventors have solved the above-mentioned problems.
As a result of various investigations to solve the
Body as a constituent, and has a glass transition point of -20 ° C or less.
Aqueous emulsion of copolymer, mineral hydraulic such as cement
The composition consisting of a volatile substance and an inorganic flame retardant is
Find out that it has the ability as a water material
completed. Hereinafter, the present invention will be described in detail. This specification
In the text, acrylate or methacrylic acid
Stell is called (meth) acrylate, acrylic
Amide or methacrylamide to (meth) acrylamide
That. BEST MODE FOR CARRYING OUT THE INVENTION A (A) Aqueous emulsion of copolymer
Copolymer in aqueous emulsion of copolymer of the present invention
Is a (meth) acrylate having an alkyl group having 4 to 10 carbon atoms.
Alkyl acrylate 20-90% by weight, (meth) acrylic acid
Methyl or / and ethyl (meth) acrylate 0.1-8
Weight%, and (meth) acrylic represented by the following general formula
0.01 to 30% by weight of amide as an essential constituent monomer unit
And a glass transition point of −20 ° C. or less. Having an alkyl group having 4 to 10 carbon atoms (meth
(T) Alkyl acrylates provide weather resistance, cold resistance and
It is a component for imparting alkali resistance. Carbon number 4 ~
Alkyl (meth) acrylate having 10 alkyl groups
Specifically, butyl (meth) acrylate, (meth)
(T) isobutyl acrylate, (meth) acrylic acid-2-
Ethylhexyl, n-octyl (meth) acrylate and
And (meth) acrylic acid-n-hexyl.
An alkyl (meth) acrylate having less than 4 carbon atoms is
Use in large quantities as the alkali resistance of the coating film will decrease
(Meth) acrylic acid that cannot be produced and has more than 10 carbon atoms
Alkyl cannot be used due to reduced cold resistance. (Me
(T) The copolymerization ratio of alkyl acrylate is 20 to 90 times
%, Preferably 60 to 90% by weight. this
When the proportion is less than 20% by weight, the weather resistance of the coating film is low.
On the other hand, if it exceeds 90% by weight, the coating film becomes sticky.
It will stick and the strength will decrease. In the present invention, as an essential component of the copolymer,
Methyl (meth) acrylate and / or (meth) acrylic
Ethyl acid is used and (meth) acrylic acid
Methyl is preferred. These monomer units in the copolymer,
Hydrolysis by the alkali in the cement
Forms internal crosslinks with Ca in the coating to increase the strength of the coating film, etc.
Gives a favorable effect. These monomer copolymerization ratios,
0.1 to 8% by weight. This ratio is less than 0.1% by weight
Otherwise, the strength of the coating film will be reduced, and it will be 8% by weight.
If the amount is too high, the water resistance and alkali resistance of the coating film will be extremely reduced.
However, the performance as a waterproof material cannot be maintained. (Meth) acrylic represented by the following general formula
As the amide, N-methylol (meth) acrylamide
And N- (butoxymethyl) (meth) acrylamide
Etc. can be exemplified. Embedded image (However, R ¹ Is hydrogen or a methyl group, R ^Two Is
It is hydrogen or an alkyl group having 1 to 4 carbon atoms. The details of the action of the monomer are unknown,
When mixed with mineral hydraulic substances, aqueous emulsion
Stability, drying properties of the resulting coating and adhesion to the substrate
There is a function to improve the like. The copolymerization ratio of the monomer is
0.01 to 30% by weight, preferably 0.1 to 10% by weight.
Good. When less than 0.01% by weight, the above effects are exhibited.
If not more than 30% by weight, the water resistance of the coating film is remarkably reduced.
Resulting in. As the copolymer, if necessary,
Monomer having an unsaturated ethylene bond copolymerizable with the
It may be copolymerized. As the monomer,
Normally copolymerizable monomer in (meth) acrylic polymer
What is necessary is just what is used as, specifically,
Styrene, (meth) acrylonitrile, vinyl acetate and
And vinylidene chloride. However, as a functional group
Monomers having ruboxyl or sulfonic acid groups and ordinary
Cationic monomers reduce the stability of the emulsion
In some cases, it is preferable not to use it. These co
The copolymerizable ratio of the monomer that can be
100 parts by weight or less based on 100 parts by weight of alkyl luate
Preferably, the glass transition point of the copolymer shown below is -20.
The type and copolymerization ratio can be selected so that the temperature is below
preferable. The copolymer in the component (A) is the above-mentioned monomer
Glass transition point of the copolymer obtained by polymerizing
(Hereinafter referred to as Tg point) having a temperature of -20 ° C or lower is used.
You. This makes it a thick coat of several hundred μ at a time as a waterproofing agent.
No cracks, cracks, etc.
Excellent crack followability, specifically for building movement
Therefore, even if a crack of several mm occurs on the substrate,
That can follow well without causing holes,
It is also excellent in coating properties and film forming properties at low temperatures. Where Tg point
When a polymer exceeding -20 ° C is used,
If the film thickness is set to a level normally applied with a waterproofing agent,
The film is liable to cracks and cracks, etc.
Water leakage occurs due to cracks, etc., fully exhibiting waterproof performance
And the coating film after film formation cannot
Inadequate submissiveness. In the present invention, the Tg point of the copolymer is
The temperature at which the various properties of the fixed polymer suddenly change.
Freezes the motion of molecular segments in the amorphous part of the polymer
Temperature. Actually measure the Tg point of the copolymer
For example, measuring the thermal expansion at various temperatures
Plot the specific volume for each temperature and obtain
A general method to determine the temperature at the point where the curve is bent
Used. However, in practice, each individual monomer is
Since the value of the Tg point of the polymer consisting of
Can be obtained by the following formula.
You. 1 / Tg = CA / TgA + CB / TgB +...
+ CX / TgX CA: Weight fraction of component A CB: Weight fraction of component B CX: Weight fraction of component X TgA: Tg of component A homopolymer (° K) TgB: Weight of component B Tg (° K) of coalesced TgX: Tg (° K) of homopolymer of component B Here, CA + CB +... + CX = 1. [0023] The component (A) is added in the presence of a surfactant.
What is necessary is just what was obtained by superposing | polymerizing the said monomer. Surface activity
As a surfactant, the stability of the emulsion and the adhesion to the substrate
Cationic or nonionic surface active
Agents are preferred. Cationic surfactant that can be used in the present invention
Agents include trimethyloctadecyl ammonium chloride
Ride, trimethyl dodecylammonium chloride,
Trimethylhexadecyl ammonium chloride, Al
Killed dimethylbenzyl ammonium chloride, diste
Allyl dimethyl ammonium chloride and trimethyl
Quaternary ammonium such as stearyl ammonium chloride
Salt, dimethyloctylamine, dimethyldecyl
Amine, dimethyl lauryl amine, dimethyl myristyl
Amine, dimethyl palmitylamine, dimethyl stearyl
Luamine, dimethyl oleyl amine, trioctylamine
, N-methylmorpholin, dimethylbenzylamine
And tertiary amines such as polyoxyethylene alkylamines
And the like. As the nonionic surfactant, a normal (meaning)
Ta) Used in the production of acrylic polymer emulsions
Either one can be used. Specifically, polio
Ciethylene cetyl ether, polyoxyethylene steer
Lil ether, polyoxyethylene oleyl ether,
Polyoxyethylene octylphenol ether and polyoxyethylene
Polio such as loxyethylene nonylphenol ether
Alkyl or alkylphenol ether of xylene
Sorbitan monostearate, sorbitan monolau
, Sorbitan distearate, sorbitan monoo
Sorbitan, such as reate and sorbitan trioleate
Fatty acid ester, polyoxyethylene sorbitan monola
Polyoxyethylene sorbitan fatty acids such as urates
Ter, polyethylene glycol fatty acid ester, and
Glycerin monofatty acid ester and the like can be mentioned. these
Among them, it is especially excellent in polymerization stability, mechanical and chemical stability.
Polyethylene oxide with an HLB value of 15 or more
It is preferable to use a side nonionic surfactant.
No. The mixing ratio of the surfactant is determined based on the copolymer emulsion.
It may be adjusted appropriately according to the properties required for the application
In order to improve emulsion stability, surfactants
It is desirable that the blending amount of the
In order to improve the properties, a smaller amount is desirable.
A suitable compounding ratio is based on the copolymer in the emulsion.
1 to 5% by weight. As a catalyst used in the production of the component (A)
Is a radical polymerization catalyst, and is a general nonionic catalyst.
Solvents and cationic catalysts.
2,2'-azobis (2-amidino) which is a thionic catalyst
It is preferred to use (propane). (A) Production of component
Is manufactured by a general emulsion polymerization method.
Just do it. The proportion of the copolymer in the component (A) is as follows:
40-65% by weight is preferred. If less than 40% by weight
If the dryness is insufficient, and the elongation of the coating film is insufficient
On the other hand, if it exceeds 65% by weight, the copolymer
May be gelled in the production of
And workability may decrease. (B) Inorganic hydraulic substance The inorganic hydraulic substance is composed of a polyvalent metal such as Ca in this substance.
(A) The copolymer in the component is crosslinked, and the drying property of the coating film is lower.
A component that improves adhesion to the ground, flexibility and strength of the coating film
It is. As an inorganic hydraulic substance, for example, a normal bolt
Land cement, land cement, early strength cement, high
Furnace cement, white cement, silica cement, hula
Cement such as ash cement and alumina cement
In terms of price and performance, ordinary bolt land
And alumina cement are preferred. Inorganic hydraulic material
The blending ratio of the copolymer is as follows.
10 to 150 parts by weight relative to parts by weight, preferably
It is 40 to 90 parts by weight. This ratio is less than 10 parts by weight
If not, the dryness and strength of the coating film will decrease, while
If it exceeds 50 parts by weight, the kneadability with the component (A) is reduced.
Workability is reduced, and the physical properties of the coating film, especially
This makes it unsuitable as a waterproof material. ○ (C) Inorganic flame retardant The inorganic flame retardant imparts flame retardancy to the coating film of the composition of the present invention.
Metal hydroxide, metal oxide and metal salt
Is selected from As the metal hydroxide, water
Aluminum oxide and magnesium hydroxide;
Metal oxides include antimony trioxide and pentoxide
Antimony and the like; examples of the metal salt include antimony
Acid soda, magnesium carbonate, magnesium sulfate and
Barium taurate and the like can be mentioned. The inorganic flame retardant is 2
More than one species may be used in combination. Among these, the price
Aluminum hydroxide and triacid
Antimony bromide is preferred. Incorporation ratio of inorganic flame retardant
The amount is 8 parts by weight based on 100 parts by weight of the copolymer in the component (A).
0 to 200 parts by weight, preferably 90 to 160 parts by weight
Department. If this ratio is less than 80 parts by weight,
When the flame retardancy cannot be imparted to the membrane and the weight exceeds 200 parts by weight
In such a case, the strength of the coating film decreases or the water resistance decreases. ○ Other components In addition to the above essential components, the composition of the present invention has a kneading property.
Of coating, improvement of coating property, securing of coating film thickness, toughness of coating film
And flexibility to reduce the tackiness of the coating
Thus, an aggregate can be blended. As a concrete example of aggregate
For example, silica sand, talc, calcium carbonate, gypsum, silicon
Sodium, titanium oxide, silica, foam such as perlite,
Examples include mica, ferrite and carbon black
You. In addition, fibrous materials can be blended if necessary.
You. As the mixing ratio of the aggregate, the inorganic hydraulic substance 100
20 to 200 parts by weight with respect to parts by weight is more preferable.
The preferred amount is 30 to 115 parts by weight. 20 parts by weight
Otherwise, elongation and strength of the coating may decrease,
If it exceeds 200 parts by weight, the flame retardancy may decrease.
You. In addition to aggregate, it is blended with ordinary waterproof coating materials.
Thickener, defoamer, film-forming aid, reaction retarder, pigment and
And dyes and the like can also be added. Also, the viscosity of the composition
Further water can be added for adjustment purposes. Ingredient
Physically, the total amount of the components (A), (B) and (C) is 10
10 parts by weight or less is preferable with respect to 0 parts by weight.
Has a viscosity of 4000 to 20000 c of the composition of the present invention.
It is preferable to add an amount such that it becomes ps. This
Thus, the coatability of the composition can be improved. Production method and method of use The composition of the present invention comprises the components (A), (B) and (C)
(A), (B) and
(C) Component or, if necessary, these and the aggregate, in a conventional manner
Mixing each component at the construction site
It is manufactured by mixing using. Construction of the composition of the present invention
The method is usually the same as that applied in the waterproof coating method.
Specifically, brushes, roller brushes and rubber
Coating method using a spray gun or spraying using a spray gun
And the like. In the construction, in one construction
In order to increase the thickness of the coating film, the viscosity of the composition of the present invention is reduced.
It is preferable to be about 4000 to 20000 cps
No. The composition of the present invention can be applied to various substrates,
REET, mortar, slate, metal, glass and plus
Tic and the like, and on the construct composed of these
Can be constructed directly. Also, to improve the adhesion with the substrate,
After applying the appropriate primer according to the usual method
Is preferred. Other paints should be top coated on the coating of the composition.
Can also be applied as a coating. The following examples and comparative examples illustrate the present invention.
This will be described more specifically. In the following, it is not particularly noted
Unless otherwise indicated, parts mean parts by weight and% means percent by weight. Production Example 1 (Production of copolymer emulsion) In a stainless steel reactor equipped with a stirrer having an internal volume of 500 L
And 114.2 parts of ion-exchanged water, and raise the internal temperature to 80 ° C.
After heating, 231 parts of 2-ethylhexyl acrylate,
9 parts of methyl acrylate, 51 parts of styrene, N-methylo
9 parts of polyacrylamide, polyoxyethylene as emulsifier
Rennonylphenol ether (HLB: 18.9)
Surfactant 5 parts, defoamer 0.03 parts and ion-exchanged water 1
00 parts of a mixture and 2,2'-azo as a polymerization initiator
Bis (2-amidinopropane) hydrochloride (1.2 parts) and io
An aqueous solution consisting of 10.8 parts of exchanged water is continuously added,
Polymerization was performed for 4 hours to obtain a copolymer emulsion. Get
The resulting emulsion was a copolymer 5 having a Tg point of -58.3 ° C.
6%, having a viscosity of 256 cps and a pH of 5.7
there were. (This emulsion is designated as No. 1.) (Freeze-thaw stability) Emulsion N
o. After placing 400 cc in a polyethylene bag and sealing,
Leave in a constant temperature and humidity chamber manufactured by Furuya Scientific Instruments Co., Ltd.
For 8 hours at 60 ° C. for 6 hours
Thereafter, the emulsion state was observed. The result is a suspect
There was no occurrence and the viscosity was good at 290 cps. Production Examples 2 to 5 (Copolymer emulsion
Production) Use the raw materials shown in Table 1 and use them in the proportions shown in Table 1.
Copolymer emulsion was prepared in the same manner as in Production Example 1 except that
Was manufactured. [Table 1] 1) to 7) in Table 1 have the following meanings.
Show. 1) The unit is part 2) NMAA: N-methylolacrylamide 3) NBAA: N- (butoxymethyl) acrylamide 4) TMHDAC: trimethylhexadecyl ammonium
Muchloride 5) POENPE: polyoxyethylene nonyl phenol
6) Catalyst: 2,2'-azobis (2-aminodipropa)
7) Antifoaming agent: Nopco 267A, manufactured by San Nopco Co., Ltd. Examples 1 to 7 Using the obtained copolymer emulsions,
The components were stirred and mixed to produce a waterproofing composition. Got
Various physical properties of the composition and coating film physical properties were evaluated according to the following.
Was. Table 3 shows the results. Pot life: The kneaded waterproofing composition is placed in a polyethylene cup and placed in a polyethylene cup.
Leave the sample in a constant temperature room at 0 ° C.
Pot life when the time is below 30,000 cps
(Pot life). Coating physical properties JIS A 6021 "Acrylic rubber coating for roof waterproofing"
Test at 20 ° C and-
Conduct tensile test at 10 ° C and elongation at each temperature
The modulus and tensile strength were measured. For testing, thickness 1 ± 0.2m
m of coatings were used. Swelling ratio after immersion in water (water resistance / alka resistance)
D) Dampen from the paint film used in the tensile test for paint film properties.
Specimens are punched out using the No. 3 mold and left in water for one week
After and after alkali treatment of JIS A 6021
Then, the length of the coating film immediately after taking out the test piece was measured. Circular on Dangerous Goods, Fire-Retardant Fire Service Act "
Judgment criteria for flame retardancy of all urethane foams "
Until the fire on the test piece extinguishes from the moment the burner is released.
The burning time was defined as the burning time, and the burning time was defined as the burning length.
In addition, the burning time is 60 seconds or less, and the burning length is 60 mm or less.
The following were accepted. Weather resistance According to JIS A 6021, JIS A 141
Visual observation of the appearance of the coating film after 1000 hours of UV treatment with No. 5
I thought. ：: no change in coating film, Δ: slight discoloration in coating film
×, cracks and discoloration are observed in the coating film. ・ Epoxy resin is applied to a slate plate of 300 × 300 × 3 mm.
The resulting waterproofing composition is applied to the surface on which the limer has been applied and dried.
2 kg / m ^Two Spray at 20 ° C, 60% RH
In the atmosphere and perform a weight test to cure the coating.
The interval was measured. * Weight test: Stand a pencil on the coating surface and apply 1kg weight
Add for 5 seconds, until there is almost no pencil mark on the coating surface
Measure the time in. [Table 2] 1) to 6) in Table 2 have the following meanings.
Show. 1) The unit is part 2) PC: Portland cement, AC: Alumina seme
The numbers in parentheses indicate 100 parts of the copolymer in the emulsion.
3) Al: aluminum hydroxide, Sb: antimony trioxide
Numbers in parentheses indicate 100 parts of the copolymer in the emulsion.
4) Milcon: natural fibrous clay mineral anti-sag material, Showa
5) Viscosity: slurry viscosity, unit is cps. 6) PL: pot life. Comparative Examples 1 to 5 In the same manner as in Example 1 except that the components shown in Table 4 were used.
A composition was prepared. The obtained composition was treated in the same manner as in Example 1.
Table 5 shows the results of the evaluation. Comparative Example 1 The composition of Comparative Example 1 is an example in which the proportion of the inorganic flame retardant is small.
Yes, the coating film burns out in a combustion test,
Did not have. Comparative Example 2 In the composition of Comparative Example 1, the proportion of the inorganic hydraulic substance was large.
It is a compounded example, and the coating film has flame retardancy.
However, the weather resistance was insufficient and the flexibility was poor.
Was. Comparative Example 3 The composition of Comparative Example 3 contained a large amount of an inorganic flame retardant.
In the example, although the coating has flame retardancy, the coating has strength,
It was inferior in water resistance and alkali resistance. Comparative Example 4 The composition of Comparative Example 4 is a commercially available ethylene-vinyl acetate emulsion.
The flame retardancy of the coating film, low temperature elongation, water resistance
It was inferior in alkalinity and alkali resistance. Comparative Example 5 In the composition of Comparative Example 5, the copolymer was (meth) acrylic acid
Copolymer of chill or ethyl (meth) acrylate
And the ratio of inorganic hydraulic substances and inorganic flame retardants
The coating is slightly less visible and the coating is flame retardant,
And poor water resistance and alkali resistance. [Table 4] In Table 4, 1) to 7) have the following meanings.
Show. 1) The unit is part 2) PC: Portland cement, AC: Alumina seme
The numbers in parentheses indicate 100 parts of the copolymer in the emulsion.
3) Al: aluminum hydroxide, Sb: antimony trioxide The number in parentheses indicates 100 parts of the copolymer in the emulsion.
4) Milcon: natural fibrous clay mineral anti-sag material, Showa
Mining Co., Ltd .; Milcon 5) Viscosity: slurry viscosity, unit is cps 6) PL: pot life 7) Commercial product 1: ethylene-vinegar biemulsion, Nippon Gosei
Chemical Industry Co., Ltd .; Hiflex # 1000 (solid
[Table 5] The composition of the present invention comprises a halogen-based monomer.
Or it is excellent in safety without using polymer
Film formation is fast and the resulting coating has flame retardancy
Top, weather resistance, strength, flexibility, water resistance and alkali resistance
It has excellent performance required as a waterproof material.
You. In addition, cationic emulsions
Or, if a nonionic emulsion is used, freeze
Excellent in setting stability, inorganic hydraulic substance, inorganic flame retardant and
When blended with aggregates, it can rapidly increase viscosity and gel.
And has a sufficient pot life.

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification code FI C09D 133/12 C09D 133/12 133/26 133/26 C09K 3/18 101 C09K 3/18 101 (58) .Cl. ⁷ , DB name) C09D 1/00-10/00 C09D 101/00-201/00

Claims (1)

(57) Claims: (A) 20 to 90% by weight of an alkyl (meth) acrylate having an alkyl group having 4 to 10 carbon atoms, methyl (meth) acrylate and / or (meth) ) 0.1 to 8% by weight of ethyl acrylate and 0.01 to 30% by weight of (meth) acrylamide represented by the following general formula are essential constituent monomer units, and the glass transition point is -20 ° C or lower. A slurry mixture comprising an aqueous emulsion of a copolymer, (B) an inorganic hydraulic substance, and (C) an inorganic flame retardant selected from metal hydroxides, metal oxides and metal salts, wherein the component (B) is 10 to 150 parts by weight per 100 parts by weight of the copolymer in the component (A), and 80 to 2 parts by weight of the component (C) per 100 parts by weight of the copolymer in the component (A).
A composition for waterproofing a flame-retardant coating film, which is 00 parts by weight. Embedded image (However, R ¹ is hydrogen or a methyl group, and R ² is hydrogen or an alkyl group having 1 to 4 carbon atoms.)