JP2003301142A - Primer for cement execution, cement execution method and cement structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a primer for cement execution which has high resistance to water and to alkali and strong cohesive force enough to exhibit high and stable adhesive force in jointing concrete or mortar and can maintain the excellent adhesive force even when a step of jointing concrete or mortar is delayed by some cause, a cement execution method wherein the primer for the cement execution is used, and a cement structure obtained by applying the cement execution method. <P>SOLUTION: The primer for the cement execution comprises at least one compound selected from the group consisting of a monomer, an oligomer and a polymer which are subject to polymerization inhibition by a substance brought into contact with the surface thereof. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cement application primer, a cement application method, and a cement structure.

[0002]

2. Description of the Related Art Generally, when a newly installed mortar or concrete is spliced onto an existing base, a phenomenon generally called dryout occurs in the newly installed mortar or concrete due to the effect of water absorption on the base. Peeling may occur on the splice surface. As a countermeasure, oil-in-water type
It has been practiced to apply an (O / W type) emulsion or an epoxy resin as a primer on the surface of a base.

In the case of an oil-in-water (O / W) emulsion, as a measure for preventing this peeling, when the existing base is mortar or concrete, a polymer oil-in-water (O It is common to apply a primer of (/ W type) emulsion to adjust the water absorption of the base. However, EVA-based, acrylic-based, SBR-based, etc. primers have a smaller cohesive force than cement mortar and concrete, and their alkali resistance and water resistance are relatively low, which may cause durability problems. is there.

Furthermore, a primer of a polymer oil-in-water (O / W type) emulsion of EVA type, acrylic type, SBR type or the like forms a film having a water absorption adjusting effect by drying to eliminate water. Therefore, it takes a long time to dry (form a film) at a low temperature. In particular, since the primer for applying the self-leveling material is generally applied twice, it causes a delay in the construction period at low temperature. In particular, in the case of a fast-curing self-leveling material, the effect is great.

Further, the primer of oil-in-water type (O / W type) emulsion is a vinyl chloride resin such as a ceramic material used for tiles and the like other than mortar or concrete as a base, a finishing flooring material for interior, etc. Or vinyl chloride-vinyl acetate copolymer resin, vinyl acetate resin or vinyl copolymer resin of adhesives used for bonding them, rubber latex and epoxy resin, polyurethane or epoxy resin used for interior finish flooring material, In the case of unsaturated polyester resin, metal such as steel frame, and wood materials widely used for interiors, sufficient adhesive force cannot be obtained.

There is a method of using an epoxy resin adhesive as a primer other than the epoxy resin oil-in-water type (O / W type) emulsion. This adhesive is a mixture composed of a main agent containing an epoxy resin as a main component and a polyamine-based curing agent, and has high adhesiveness, and stable cohesive force and durability can be obtained even after curing. Further oil-in-water type (O /
A stable adhesive force can be obtained even on a base other than mortar or concrete, for which sufficient adhesive force cannot be expected with a W type emulsion primer. However, in the splicing after the adhesive applied with these adhesive properties is hardened, the adhesive force with the new mortar or concrete for splicing can hardly be expected. Therefore, if the step of splicing concrete or mortar is delayed for some reason, the base and the concrete or mortar may separate.

[0007]

In view of the above situation, the present invention has high water resistance, alkali resistance, and strong cohesive force when splicing concrete or mortar, and thus has high and stable adhesive force. , Even if the process of splicing concrete or mortar is delayed for some reason,
An object of the present invention is to provide a primer for cement construction that maintains excellent adhesive strength, a cement construction method using the primer for cement construction, and a cement structure obtained by carrying out the cement construction method.

[0008]

In order to achieve the above object, the primer for cement construction according to the present invention is at least selected from the group consisting of a monomer, an oligomer and a polymer which are subjected to polymerization inhibition by a substance in contact with the surface. Includes one compound. Further, in this case, the compound is preferably subjected to polymerization inhibition by a component in the air. More preferably, the polymerization is inhibited by oxygen. Suitably, the compound is a thermosetting resin.

Another aspect of the present invention is a cement construction method, in which the above-mentioned cement construction primer is applied onto a substrate, and then uncured mortar or uncured concrete is applied. Including doing.
In this case, it is preferable to use a self-leveling material as uncured mortar or uncured concrete. Another aspect of the present invention is a cement structure, which is constructed by carrying out the cement construction method of the present invention.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a cement construction primer, a cement construction method, and a cement structure according to the present invention will be described in more detail with respect to their embodiments. In the present invention, examples of the compound that undergoes polymerization inhibition by the substance in contact with the surface include urethane acrylate resin, epoxy acrylate resin, unsaturated polyester resin and the like. Examples of the substance that inhibits polymerization by contacting the surfaces of these resins include diphenylpicrylhydrazyl, di-p-fluorophenylamine, tri-p-
Nitrophenylmethyl, benzoquinone, chloranil, p
Examples thereof include -t-butylcatechol, hydroquinone, m-dinitrobenzene, nitrobenzene, p-phenyldiamine, sulfur and oxygen. In particular, a compound which is inhibited from being polymerized by a component in the air is preferable because a step of applying a substance which inhibits the polymerization is unnecessary. In this case, oxygen is the most suitable component.

When the term "polymerization" is used in this specification, the concept of "condensation" or "condensation polymerization" is also included. Further, "monomers" include not only the case where a single monomer is polymerized but also the case where a plurality of molecular species are polymerized. When a polymer is used as a raw material compound, it includes a case where a raw material compound that has been polymerized to some extent is further polymerized to become a higher polymer.

More preferable examples of the compound which is inhibited by polymerization include bisphenol epoxy acrylate resin, novolac epoxy acrylate resin and bisphenol unsaturated polyester resin which are inhibited by oxygen in the air. They are,
It is a thermosetting resin that is cured by mixing two or more kinds. A thermosetting resin that cures at room temperature is suitable because it does not need to be heated. These thermosetting resins start a curing reaction by mixing a main agent in which a styrene monomer is mixed with epoxy acrylate or unsaturated polyester and a curing agent (accelerator and / or catalyst). Other than that, polymerization inhibitors,
A polymerization inhibitor, a shrinkage reducing agent, etc. may be mixed. Further, a part of the curing agent, a polymerization inhibitor, a polymerization inhibitor, a shrinkage reducing agent, etc. may be added to the main component. Examples of the epoxy acrylate include bisphenol epoxy acrylate and novolac epoxy acrylate, and examples of the unsaturated polyester include bisphenol unsaturated polyester. The styrene monomer is 100% of each of epoxy acrylate or unsaturated polyester.
10 to 250 parts by weight is preferable, and 50 to 50 parts by weight.
More preferably 150 parts by weight. If the amount of the styrene monomer is less than 10 parts by weight, the workability is deteriorated due to the high viscosity, and if it exceeds 250 parts by weight, the film strength decreases. The styrene monomer may be a styrene monomer such as chlorostyrene or divinylbenzene, or a polymerizable monomer such as methyl (meth) acrylate, ethyl (meth) acrylate, or ethylene glycol di (meth) acrylate. Substitute within a range that does not impair the purpose,
It is also possible to use. Since the curing agent cures in a short time even at room temperature, it is preferable to use the accelerator and the catalyst together. As the accelerator, known ones can be used, and organic metal acids such as cobalt salts represented by cobalt naphthenate and cobalt octenoate, benzyldimethylamine, 2,4,6-tris (dimethylaminomethyl) phenol, Examples include tertiary amines such as triethylamine. The accelerator is 0.01 to 100 parts by weight of each of epoxy acrylate or unsaturated polyester.
5.0 parts by weight is preferred. If it is less than 0.01 part by weight, the curing time will be remarkably delayed, and if it exceeds 5.0 parts by weight, the film strength will be lowered. As the catalyst, known catalysts can be used, and examples thereof include ketone peroxides typified by methyl ethyl ketone peroxide, cumene hydroperoxide, tertiary butyl hydroxides and the like, organic peroxides and the like. The amount of the catalyst is preferably 0.1 to 5.0 parts by weight, more preferably 0.2 to 2.0 parts by weight, based on 100 parts by weight of the epoxy acrylate or the unsaturated polyester. If it is less than 0.1 part by weight, the curing time will be remarkably delayed, and if it exceeds 5.0 parts by weight, the film strength will be reduced. Furthermore, compounds suitable for the above bisphenol-based epoxy acrylate include compounds that give the following general formula. The novolac-based epoxy acrylate resin containing this compound as the main component is subjected to polymerization inhibition by oxygen.

[Chemical 1] (N in the formula is 1 to 4.)

Further, compounds suitable for the above-mentioned novolac type epoxy acrylate include compounds having the following general formula. The novolac-based epoxy acrylate resin containing this compound as the main component is subjected to polymerization inhibition by oxygen.

[Chemical 2] (N in the formula is 1 to 4.)

Furthermore, compounds suitable for the above bisphenol unsaturated polyester resin include compounds having the following general formula. Bisphenol-based unsaturated polyester resin containing this compound as the main agent,
Polymerization is inhibited by oxygen.

[Chemical 3] (In the formula, n is 1 to 7.) In the present invention, by using a thermosetting resin that is cured by mixing two or more kinds of such compounds, it is possible to obtain high water resistance, alkali resistance, and strong cohesive force. A stable adhesive force can be expected.

The primer for cement application according to the present invention is applied on a base, and uncured mortar or uncured concrete is applied on the base. The primer is a water absorption modifier (material) for the base used when concrete or mortar is spliced onto the existing base,
Alternatively, it means an adhesion enhancer (material) with the substrate. In the case of the present invention, the property of the adhesion enhancer (material) with the base is large.

The concrete or mortar referred to in the present invention is a mixture of a hydraulic substance such as cement, gypsum, dolomite plaster, etc. as a binder, which is mixed with aggregate and water, and a commonly used admixture ( Material) is added and mixed. Concrete contains aggregates with a particle size of 5 mm or more, and mortar contains aggregates with a particle size of less than 5 mm. As the admixture (material), inorganic powder, hydratable swelling substance, fiber, thickener, water reducing agent, water retention agent, pigment, shrinkage reducing agent, surfactant, defoaming agent,
Waterproofing agent, rust preventive agent, workability improving agent, separation preventing agent, water repellent,
AE agents, anti-whitening agents, polymers for cement and the like can be mentioned, and one kind or two or more kinds can be used if necessary.

The cement construction method according to the present invention comprises applying the cement construction primer according to the present invention onto a substrate,
Then, it includes applying (splicing) uncured mortar or uncured concrete. In the present invention, the surface of the primer is subjected to polymerization inhibition by the components in the air, so that it has a stable adhesive force even when it takes several days from the application of the primer to the jointing of concrete or mortar. According to the cement construction method of the present invention, an excellent cement structure can be obtained by cement construction regardless of the delay in the construction period. As the uncured mortar or uncured concrete, a self-leveling material is suitable. Since the self-leveling material has high fluidity, it has the property that a flat and smooth floor can be formed simply by flowing it on the floor surface and easily smoothing it. Generally, cement or gypsum is the binder mortar.

The compound which is used in the present invention and which is inhibited by polymerization due to the substance in contact with the surface, is applied to a porous substrate, and if the viscosity is too low, the compound will be sucked into the substrate and the coating amount will increase. become worse. From this, the viscosity is preferably 50 mPa · s or more. Further, in consideration of workability, the viscosity is more preferably 1000 mPa · s or less.

[0019]

EXAMPLES Examples and comparative examples of the present invention will be given below.
The operation and effect of the present invention will be described in more detail.

Primers used in Examples 1 and 2 and Comparative Examples 1 to 4 Table 1 shows the primers used in Examples and Comparative Examples. The viscosity was measured with a B-type viscometer. In Example 1, 150 parts by weight of a styrene monomer, 1 part by weight of methyl ethyl ketone peroxide, and 0.5 parts by weight of cobalt naphthenate were added to 100 parts by weight of a bisphenol epoxy acrylate having the following general formula. A bisphenol-based epoxy acrylate resin was used, which is subject to polymerization inhibition by oxygen.

[Chemical 4] (In the formula, n is 1.) In Example 2, 150 parts by weight of a styrene monomer, 1 part by weight of methyl ethyl ketone peroxide, and 0 parts of cobalt naphthenate were used with respect to 100 parts by weight of a novolac epoxy acrylate having the following general formula. A novolac-based epoxy acrylate resin, which was blended in an amount of 0.3 part by weight, was subjected to polymerization inhibition by oxygen in the air.

[Chemical 5] (N in the formula is 1.)

In Comparative Example 1, Taiheiyo Material Co., Ltd. Taiheiyo Mohlit emulsion (solid content 45%) was used.
In Comparative Example 2, Taiheiyo Effect manufactured by Taiheiyo Material Co., Ltd. (solid content: 45%) was used. In Comparative Example 3, Taiheiyo Material Co., Ltd., Taiheiyo CX-B (solid content: 45%) was used.
In Comparative Example 4, Unitac 50 manufactured by Taiheiyo Materials Co., Ltd.
00-3 was used.

[Table 1] * 1 Comparative Examples 1, 2, and 3 show the viscosities when diluted with water so that the solid content becomes 15%, respectively, because dilution is performed with water at the time of application.

Test for confirming surface polymerization inhibition by components in air of Examples 1 and 2 Test method 1) Each primer was applied onto two acrylic plates. 2) One of the acrylic plates coated with the primer was left as it was so that the surface layer of the coated primer was in contact with air. Immediately after applying the primer to the other acrylic plate, cover it on the primer coated with the acrylic plate,
The applied primer was allowed to stand so that the surface layer of the primer did not come into contact with air. 3) After 3 days, the acrylic plate over the primer was removed, and the tackiness of the primer surface layer applied on the two acrylic plates coated with the primer was confirmed by touching with a finger.

Experimental results The experimental results are shown in Table 2.

[Table 2]

Adhesion Test Using Examples 1 and 2 and Comparative Examples 1 to 4 Method of Creating Adhesion Test Specimen A predetermined amount of primer was applied to the base with a brush and the temperature was adjusted to 2
Curing is performed at 0 ° C and humidity of 60% for a predetermined time,
Mortar was applied thereon with a thickness of 10 mm, and a predetermined curing was performed to obtain an adhesion test body.

Preparation method of base of adhesion test body 1) Concrete base JIS A 5371 Annex 2 Normal plate Nominal 30
Dirt and deposits on the surface of a concrete plate of 300 × 300 × 60 mm conforming to the regulation of 0 were removed with a wire brush, washed with water, and thoroughly dried to obtain a concrete base. 2) 300 g / m ^{2 of} adhesive for vinyl flooring material conforming to JIS A 5536 (adhesive Royale S for rubber latex vinyl floor tile / vinyl floor sheet manufactured by Tori Co., Ltd.) conforming to JIS A 5536 A fully cured product was used as the adhesive base.

3) Vinyl Floor Tile Underlayer A vinyl floor tile was pasted on the adhesive substrate immediately before the adhesive was applied (before the adhesive was cured), and the adhesive was sufficiently cured to obtain a vinyl floor tile substrate. 4) Porcelain Tile Foundation Substrate An interior ceramic tile was attached to a concrete substrate using an epoxy adhesive, and the adhesive was sufficiently cured to obtain a ceramic tile substrate. 5) Wood base A flooring material was attached to a concrete base with an epoxy adhesive and the adhesive was sufficiently cured to obtain a wood base.

Applying primer The primer was applied as shown in Table 3.

[Table 3] Also, the period from primer application to mortar construction
(Primer curing period) was set to 1 hour, 5 hours, and 1 day.

Mortar formulation Taiheiyo Cement Co., Ltd. ordinary Portland cement 500
g, 1,500 g of mountain sand from Hamaoka-cho, Ogasa-gun, Shizuoka Prefecture, 27 tap water
0 g of cement: aggregate (weight ratio) was 1: 3 mortar (1: 3 mortar).

Mortar Curing Mortar curing was as follows. Standard curing: After mortar molding, curing was carried out at a temperature of 20 ° C. and a humidity of 60% for 7 days. Curing in water: After mortar molding, curing was carried out for 24 hours under conditions of temperature of 20 ° C. and humidity of 60%, and after curing for 5 days in water of temperature of 20 ° C., followed by drying for 24 hours under conditions of temperature of 20 ° C. and humidity of 60%.

Measurement of Adhesion Strength On the surface of the adhesion test body 1 shown in FIG. 1, points 11 to 11 shown in FIG.
A notch was made to reach the depth of 15 and the surface of the square notch was sufficiently polished with a No. 150 sandpaper, and then a 40 × 40 mm steel jig was attached with an epoxy adhesive. After the adhesive was cured, the adhesion strength was measured using a Kenken-type adhesive strength tester.

Results of measurement of adhesion strength The adhesion strength measurement results are shown in Tables 4 and 5.

[Table 4]

[Table 5]

* 2 The position of the fracture surface is as shown in FIG. Numerical values such as E100 indicate the area ratio (%).
The test body 1 includes a base layer 21, a primer layer 22, and a mortar layer 23, to which a steel jig 25 is bonded with an epoxy adhesive 24. * 3 The evaluation criteria for the adhesion test results are: A: Cohesive failure of the base B: Failure of the primer-primer adhesive interface C: Failure of the primer cohesive interface D: Failure of the primer-mortar adhesive interface E: Cohesive failure of the mortar, ○: Adhesive strength 1.0 N / Mm ² or more and the total of fracture surfaces B, C and D is less than 50% ×: Adhesive strength is less than 1.0 N / mm ² or the total of fracture surfaces B, C and D is 50% or more.

Summary of Adhesion Test Results 1) Regarding Examples 1 and 2, the film formation (curing) after application of the primer is fast, and even after the film formation, only the primer surface is in an uncured state due to polymerization inhibition of the primer surface. The curing period is 1
Stable adhesive strength is exhibited in the respective adhesion test results for hours, 5 hours, and 1 day. Even in the adhesion test results of underwater curing, stable adhesion is exhibited. Any of the concrete, the adhesive, the vinyl floor tile, the ceramic tile, and the wood as the base material exhibits a stable adhesion force in the adhesion test result.

2) Regarding Comparative Examples 1, 2 and 3, when the curing period of the primer was 1 hour, the film formation (drying) after application of the primer was slow, and the film of the primer was not formed during the mortar application. In the result, sufficient adhesive force is not obtained. In the adhesion test result of underwater curing, the film of the primer swells due to the water and the strength is lowered, and thus the sufficient adhesion force is not obtained in the adhesion test result. Adhesive strength was not obtained sufficiently in the adhesion test results with substrates other than concrete.

3) Comparative Example 4 When the curing period of the primer was 1 day, the primer was completely cured and no adhesion was obtained in the adhesion test result.

Example 1, 2, 2, 2, 1, 3, 2 and 3
And 2 to 4 of Comparative Example 1 and 3 of 1 to 3 of Example 1, 2 and Comparative Examples 1 to 4 are 1: 3 as described above.
Mortar was used. 2 and 2 of Example 1 in which the self-leveling material is used in the mortar layer formed of this 1: 3 mortar.
No. 2, 1-3, 2-3 and Comparative Example 1-2-4, 2 and 1-3-4 are shown below.

Primers used Examples 1, 2 and 3 of Example 1 are the same as Example 1 using 1: 3 mortar, and Examples 2 and 2 and 3 of Example 2 are examples using 1: 3 mortar. Same as 2, 2 and 3 of Comparative Example 1,
Same as Comparative Example 1 using 1: 3 mortar, 2 and 2 and 3 of Comparative Example 2 are the same as Comparative Example 2 using 1: 3 mortar, and 2 and 3 of Comparative Example 3 are 1: Same as Comparative Example 3 using 3 mortar, 2 and 4 of Comparative Example 4 were the same as Comparative Example 4 using 1: 3 mortar.

Adhesion test using Example 1, 2, 2 2, 1, 3, 2, 3 and Comparative Example 1, 2-4, 2 and 1-3, 4-3. : Examples 1 and 2 using 3 mortars and Comparative Examples 1 to 4
Created in the same way. However, the applied mortar was a self-leveling material.

Substrate preparation method for adhesion test specimen A concrete substrate was used, and the preparation method was the same as in Examples 1 and 2 and Comparative Examples 1 to 4 using 1: 3 mortar.

Primer Application In accordance with the example of Table 3 above, with respect to primer application, Example 1
2, 1 and 3 are the same as in Example 1 using 1: 3 mortar, 2 and 2 and 3 in Example 2 are the same as Example 2 using 1: 3 mortar, and Comparative Example 1 is 2 3 of 1 is the same as Comparative Example 1 using 1: 3 mortar, 2 of Comparative Example 2 and 3 of 2
Is the same as Comparative Example 2 using 1: 3 mortar, Comparative Example 3
Nos. 2 and 3 of 3 were the same as Comparative Example 3 using 1: 3 mortar, and Nos. 2 and 4 of Comparative Example 4 were the same as Comparative Example 4 using 1: 3 mortar. However, the period from primer application to mortar construction (primer curing period) is 1
The time was 5 hours and 3 days.

C. Self-leveling material used In Examples 1 and 2 and 2 and Comparative Example 1, 2, 2 and 2, 3 and 2, and 4 and 2, cementitious self-leveling materials were used. Trade name: Taiheiyo Material Co., Ltd. Taiheiyo SL Curing time: setting time (finishing) 10 hours 10 minutes It was measured according to "quality standard of JASS 15M-103 self-leveling material". For 3, 2, 3 of Example 1, and 3, 2, 3, 3, 3, 4, 3 of Comparative Example 1, a quick-hardening cement-based self-leveling material was used. Mixing: As shown in Table 6 (100% normal Portland cement
As parts by weight)

[Table 6] Curing time: setting time (finalization) 3 hours It was measured according to "quality standard of JASS 15M-103 self-leveling material".

Curing of mortar Curing of mortar was standard curing, and after mortar molding, curing was carried out at a temperature of 20 ° C. and a humidity of 60% for 7 days.

Measurement of adhesion strength Examples 1 and 2 using 1: 3 mortar and Comparative Examples 1 to 4
Was similar to.

Results of adhesion strength measurement The adhesion strength measurement results are shown in Tables 7 and 8.

[Table 7]

[Table 8]

* 2 The position of the fracture surface is as shown in FIG. Numerical values such as E100 indicate the area ratio (%).
The test body 1 includes a base layer 21, a primer layer 22, and a mortar layer 23, to which a steel jig 25 is bonded with an epoxy adhesive 24. * 3 The evaluation criteria for the adhesion test results are: A: Cohesive failure of the base B: Failure of the primer-primer adhesive interface C: Failure of the primer cohesive interface D: Failure of the primer-mortar adhesive interface E: Cohesive failure of the mortar, ○: Adhesive strength 1.0 N / Mm ² or more and the total of fracture surfaces B, C and D is less than 50% ×: Adhesive strength is less than 1.0 N / mm ² or the total of fracture surfaces B, C and D is 50% or more.

Summary of Adhesion Test Results 1) Regarding Example 1, 2, 1, 3, 2, 2, 2 and 3, the film formation (curing) was rapid after the primer was applied, and the polymerization of the primer surface was inhibited even after the film formation. Due to the fact that only the primer surface is uncured, the curing period of the primer is 1
Stable adhesive strength is exhibited in the respective adhesion test results for hours, 5 hours, and 3 days. When the fast-curing self-leveling material was used, a cured self-leveling material integrated with the substrate was obtained 4 hours after the primer was applied (the time required from the application of the primer until the setting of the fast-curing self-leveling material was completed). It was

2) In Comparative Example 1, 2, 1, 3, 2, 2, 2, 3, 3, 2, 3 and 3, when the curing period of the primer is 1 hour, film formation (drying) after the primer is applied. However, since the primer coating was not formed during mortar application, sufficient adhesion was not obtained in the adhesion test results. Even when the fast-curing self-leveling material was used, a cured product of the self-leveling material integrated with the base could not be obtained after 4 hours from the application of the primer.

3) In Comparative Examples 4 and 3, when the curing period of the primer is 1 hour and the fast-curing self-leveling material is applied, the fast-curing self-leveling material cures faster than the primer. Peeling occurred between the layer of the fast-curing self-leveling material and the primer, and the adhesion test showed no adhesion. When the curing period of the primer is 3 days, the primer is completely cured and no adhesion is obtained in the adhesion test result.

Other Embodiments Although the present invention has been described with respect to the above-described embodiments, the present invention is not limited to such embodiments, and modifications, changes and additions obvious to those skilled in the art can be made. Are all included in the technical scope of the present invention.

[0050]

As is apparent from the above, according to the present invention, by having high water resistance, alkali resistance and strong cohesive force, it has a high and stable adhesive force and can be used for splicing concrete or mortar. Even if the process is delayed for some reason, a primer for cement construction that maintains an excellent adhesive force, a cement construction method using the primer for cement construction, and a cement structure obtained by carrying out the cement construction method. Provided.

That is, since the time required for forming a film after coating is short as described above, the work period can be shortened, and the work period can be further shortened by combining with the rapid-hardening and quick-drying mortar, which has been in increasing demand in recent years. As described above, the compatibility with the self-leveling material is good. Moreover, even if it takes several days after the film is formed and before the new concrete or mortar is spliced, the film itself hardens, but after the film is formed, only the primer surface remains uncured due to polymerization inhibition of the primer surface. is there. Therefore, it has high adhesive strength. Further, the base is a material other than concrete or mortar, for example, ceramic material, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer resin, vinyl acetate resin or vinyl copolymer resin, rubber latex, epoxy resin, polyurethane, unsaturated polyester It also has high adhesion to resins, metals and wood materials.

In the interior finishing material renovation work of a building structure, when adjusting the smoothness of the base with mortar when constructing a new interior finishing material, conventionally, the existing interior finishing material and it were pasted. After removing the adhesive, the groundwork is adjusted with mortar. However, in the case of using the present invention, it becomes possible to perform the base adjustment by the mortar without peeling off the existing interior finishing material or the adhesive which has been attached thereto, and it is often required to carry out the work in a short period of time. It is possible to significantly reduce the construction period for repairing interior finishing materials for building structures (especially stores).

[Brief description of drawings]

FIG. 1 is a conceptual diagram illustrating attachment of a steel jig to an adhesion test body when performing adhesion strength measurement.

FIG. 2 is a cross-sectional view showing a fracture position of the adhesion test body when the adhesion strength is measured.

[Explanation of symbols]

1 Adhesion test body 21 groundwork 22 Primer 23 Mortar 24 Epoxy adhesive 25 steel jig

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takao Ichimura             4-8-15 Nihonbashihonmachi, Chuo-ku, Tokyo             Within Taiheiyo Material Co., Ltd. (72) Inventor Tadaki Kuroda             4-8-15 Nihonbashihonmachi, Chuo-ku, Tokyo             Within Taiheiyo Material Co., Ltd. F-term (reference) 2E172 DD04                 4G028 FA04                 4J038 DB001 DD181 DG001 FA041                       FA231 FA251 FA281 GA01                       JA17 JA34 JB01 JB17 KA04                       PB05 PC03

Claims (7)

[Claims] 1. A primer for cement construction containing at least one compound selected from the group consisting of a monomer, an oligomer and a polymer, which is subjected to polymerization inhibition by a substance in contact with the surface. 2. The primer for cement construction according to claim 1, which contains at least one compound selected from the group consisting of a monomer, an oligomer and a polymer which are subjected to polymerization inhibition by components in the air. 3. A monomer whose polymerization is inhibited by oxygen,
The primer for cement application according to claim 2, comprising at least one compound selected from the group consisting of an oligomer and a polymer. 4. The cement construction primer according to claim 1, wherein the compound is a thermosetting resin. 5. A cement construction method comprising applying the cement construction primer according to any one of claims 1 to 4 onto a substrate, and then applying uncured mortar or uncured concrete. 6. A cement construction method comprising applying the cement construction primer according to any one of claims 1 to 4 onto a substrate, and thereafter applying a self-leveling material. 7. A cement structure constructed by carrying out the cement construction method according to claim 5 or 6.