JPH07215748A - Reinforcing agent for cement base body, composition containing the same, placing method and adhering method using this composition - Google Patents

Abstract

PURPOSE:To improve adhesion between a cement base material such as a mortar cement paste and an inorg. base material such as concrete and stone by using a rubbery org. polymer having specified silicon groups. CONSTITUTION:This reinforcing agent for a cement base material contains a rubbery org. polymer having in average >1.1 crosslinking silicon groups per one molecule. The crosslinking silicon groups are such groups that have silicon atoms bonded with hydrolytic groups, hydroxyl groups, H or halogen atoms and can be crosslinked by silanol condensation reaction. A typical example of the crosslinking silicon groups is a group expressed by formula [wherein, X is OH, hydrolytic group, H, or halogen atom, R<1> is a univalent hydrocarbon group having 1-20 carbon number, (a) is 0, 1, 2, 3, b is 0, 1, 2 (satisfying 1<=a+b), and (m) is 0, 1 to 18].

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing agent for cementitious base materials, a composition containing the same, and a driving method and a bonding method using the composition. More specifically, in particular, a cementitious base material reinforcing agent capable of improving adhesion to an inorganic base material such as mortar and cement paste, a composition containing the same, and a casting method using the composition. And the bonding method.

[0002]

2. Description of the Related Art Conventionally, mortar or the like is usually used for paving or repairing the surface of an inorganic base material such as concrete or stone, or for adhering a tile or the like to the surface of the inorganic base material.

The mortar and the like are required to have excellent properties such as adhesion to a substrate, water resistance, chemical resistance, impact resistance, etc. For the purpose of improving such properties, for example, styrene-butadiene rubber and acrylic. Attempts have been made to add rubber-based polymers such as rubber and ethylene-vinyl acetate copolymer rubber to mortar.

However, even when the rubber-based polymer is added to mortar or the like, the adhesiveness between the inorganic base material such as concrete and stone and the mortar is not sufficiently improved, and therefore, However, development of an additive capable of further improving the adhesiveness to such a base material as mortar has been awaited.

[0005]

In view of the above-mentioned prior art, therefore, the present inventors have determined the adhesiveness between cementitious base materials such as mortar and cement paste and inorganic base materials such as concrete and stone. As a result of earnest studies as much as possible for additives that can be improved, when a rubber-based organic polymer having a specific silicon group is used, a toughener capable of significantly improving such adhesiveness can be obtained. And completed the present invention.

[0006]

That is, the present invention is
It contains a cementitious base material reinforcing agent containing a rubber-based organic polymer having an average of 1.1 or more crosslinkable silicon groups per molecule, the cementitious base material reinforcing agent and the cementitious base material. Composition, a casting method characterized by driving the composition onto an inorganic substrate, and a bonding method characterized by bonding the inorganic substrate and an adherend through the composition. Regarding

[0007]

Actions and Examples As described above, the reinforcing agent for cementitious base material of the present invention is a rubber-based organic compound having an average of 1.1 or more crosslinkable silicon groups per molecule. It contains a polymer (hereinafter, also referred to as rubber-based organic polymer).

In the present invention, the cementitious base material means an uncured material such as mortar or cement paste.

Examples of the rubber-based organic polymer include polyether-based polymers obtained by polymerization of cyclic ethers such as propylene oxide, ethylene oxide and tetrahydrofuran; condensation of dibasic acid such as adipic acid and glycol, or ring opening of lactones. Polyester system obtained by polymerization; Polyolefin system such as ethylene-propylene copolymer; Copolymer system of polyisobutylene or isobutylene with isoprene; Polychloroprene; Copolymer system of polyisoprene or isoprene with butadiene, styrene, acrylonitrile, etc. A copolymer system of polybutadiene or butadiene with styrene, acrylonitrile, etc .; a copolymer system obtained by adding hydrogen to polyisoprene, a polybutadiene or a copolymer of isoprene and butadiene; Copolymer system of polyacrylic acid ester or acrylic acid ester obtained by radical polymerization of monomers such as acrylate and butyl acrylate with vinyl acetate, acrylonitrile, styrene, ethylene; Graft polymerization system obtained by polymerizing vinyl monomer; Examples thereof include those having a polymer such as polysulfide type as a skeleton.

In the present invention, from the viewpoint that a crosslinkable silicon group is easily introduced at the molecular end and a liquid polymer is easily obtained without a solvent, a general formula such as polypropylene oxide type polyether: -R ^3-. O- (in the formula, R ³
Represents a divalent alkylene group having 2 to 4 carbon atoms) and a vinyl monomer such as acrylate, styrene, acrylonitrile or vinyl acetate in the presence of a polyether or a polyether such as polypropylene oxide having a repeating unit represented by Polymers and copolymers such as graft polymers obtained by polymerization, and polyacrylic acid alkyl esters or acrylic acid alkyl esters containing 50% by weight or more of acrylic acid alkyl esters and vinyl acetate, acrylonitrile, styrene, ethylene, etc. A polymer having an average of 1.1 or more crosslinkable silicon groups per molecule having the copolymer of 1 as the skeleton is preferable, and also has good water resistance, is inexpensive, and is easy to handle as a liquid, Especially, those having a polypropylene oxide skeleton are preferred. There.

In the present invention, the crosslinkable silicon group means a group containing a hydrolyzable group, a hydroxyl group, a hydrogen atom, or a silicon atom to which a halogen atom is bonded and capable of being crosslinked by a silanol condensation reaction. Say. As a typical example of such a crosslinkable silicon group, for example, general formula (I):

[0012]

[Chemical 3]

(In the formula, X is a hydroxyl group, a hydrolyzable group, a hydrogen atom or a halogen atom, and R ¹ is a carbon number of 1 to 2.
Monovalent hydrocarbon group or the general formula 0: R ² ₃ Si-O-
(In the formula, R ² represents a monovalent hydrocarbon group having 1 to 20 carbon atoms), a triorganosiloxy group, a is 0,
1, 2 or 3, b is 0, 1 or 2 (where 1 ≦ a
+ B) and m are 0 or an integer of 1 to 18).

In the above general formula (I), when X is a hydroxyl group, a hydrogen atom or a halogen atom, the crosslinkable silicon group causes a silanol condensation reaction regardless of the presence of the silanol condensation catalyst. To form a crosslinked structure, and when X is a hydrolyzable group, the crosslinkable silicon group undergoes a hydrolysis reaction and a silanol condensation reaction due to water, regardless of the presence of a silanol condensation catalyst, to form a crosslinked structure. To form.

Typical examples of the hydrolyzable group include an alkoxyl group, an acyloxy group, a ketoximate group, an amino group, an amido group, an aminooxy group, a mercapto group, an alkenyloxy group, and the like. The alkoxyl group is particularly preferable because it has good hydrolyzability and is easy to handle. The hydrolyzable group may be bonded to one silicon atom in the range of 1 to 3.

Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom.

The number of silicon atoms forming the crosslinkable silicon group may be one or two or more, but in the case of silicon atoms connected by a siloxane bond or the like, it is usually up to about 20. If so, it can be preferably used.

In the present invention, the crosslinkable silicon group has the general formula (II):

[0019]

[Chemical 4]

A polymer which is a group represented by the formula (wherein X and R ¹ are the same as above, and d is 1, 2 or 3) is preferable from the viewpoint of low cost.

The general formula (I) and the general formula (I
In I), the monovalent hydrocarbon group represented by R ¹ preferably has 1 to 20 carbon atoms, particularly 1 to 6 carbon atoms, and the monovalent hydrocarbon group represented by R ² has 1 to 20 carbon atoms. It is preferable that it is 1-6 especially.

The crosslinkable silicon group is chemically bonded to the polymer forming the skeleton of the rubber-based organic polymer. In the bond between the crosslinkable silicon group and the skeleton-forming polymer, the formula:

[0023]

[Chemical 5]

When there is a bond such as the bond represented by the formula (4), the bond may be cleaved by water, which is not preferable. Therefore, in the present invention, in the crosslinkable silicon group, the silicon atom closest to the polymer forming the skeleton has the formula:

[0025]

[Chemical 6]

It is preferable that they are bound by a bond represented by

Examples of the method for obtaining the rubber-based organic polymer used in the present invention include the following methods.

(A) vinyltrialkoxysilane, methacryloyloxypropylmethyldialkoxysilane,
A monomer having a copolymerizable unsaturated group such as methacryloyloxypropyltrialkoxysilane and a crosslinkable silicon group in the molecule, a polymerizable monomer such as ethylene, propylene, isobutylene, chloroprene, isoprene, butadiene, and an acrylic ester. Copolymerize,
A monomer having a copolymerizable epoxy group such as γ-glycidoxypropyltrimethoxysilane and γ-glycidoxypropylmethyldimethoxysilane in the molecule and a crosslinkable silicon group is copolymerized with propylene oxide, ethylene oxide and the like. Method.

By the method (a), a rubber-based organic polymer having a crosslinkable silicon group in its molecular side chain can be obtained.

(B) A compound having a mercapto group, a disulfide group or the like and a crosslinkable silicon group in the molecule, such as mercaptopropyltrialkoxysilane and mercaptopropylmethyldialkoxysilane, which can cause a chain transfer reaction in radical polymerization. Used as a transfer agent,
A method of polymerizing a radically polymerizable monomer.

(C) A radical polymerizable monomer is prepared by using an azo or peroxide type polymerization initiator having a crosslinkable silicon group such as azobis-2- (6-methyldiethoxysilyl-2-cyanohexane). How to polymerize.

By the above methods (b) and (c), a rubber organic polymer having a crosslinkable silicon group at the molecular end can be obtained.

(D) A polymer having a functional group such as a hydroxyl group, a carboxyl group, a mercapto group, an epoxy group or an isocyanate group (hereinafter referred to as Y functional group) at the side chain and / or terminal of the polymer is used, A method of reacting with a compound containing a functional group capable of reacting with the Y functional group (hereinafter referred to as Y ′ functional group) in the molecule and having a crosslinkable silicon group.

Specific reaction examples in the above method (d) are shown in Tables 1 and 2 below, but the present invention is not limited to these examples.

[0035]

[Table 1]

[0036]

[Table 2]

In particular, in Tables 1 and 2, as the polymer having a Y functional group used as a starting material and an intermediate material, for example, a main chain of polypropylene polyol, polyethylene polyol, polytetramethylene diol, etc. is essentially common. formula: -R ⁴ -O- (wherein, R ⁴
Represents a divalent alkylene group having 2 to 4 carbon atoms), a polyale polyol comprising a repeating unit represented by the formula; a polyester obtained by condensation of a dibasic acid such as adipic acid and glycol or ring-opening polymerization of a lactone. Polyols; Polyisobutylene polyols or polycarboxylic acids; Polybutadiene or copolymers of butadiene with styrene, acrylonitrile, etc. or polycarboxylic acids; Polyol polyols obtained by adding hydrogen to polyisoprene or polybutadiene;
Isocyanate functional group-containing polymers obtained by reacting the polyol or polycarboxylic acid with polyisocyanate; vinyl-type unsaturated group-containing polymers obtained by reacting the polyols with vinyl-type unsaturated group-containing halogen compounds, etc. Polymers and the like are particularly preferable, and those having a Y functional group at the end of the polymer molecule are more preferable.

Examples of the compound having a Y ′ functional group and a crosslinkable silicon group include γ- (2-aminoethyl) aminopropyltrimethoxysilane, γ- (2-aminoethyl) aminopropylmethyldimethoxysilane,
Amino group-containing silanes such as γ-aminopropyltriethoxysilane; mercapto group-containing silanes such as γ-mercaptopropyltrimethoxysilane and γ-mercaptopropylmethyldimethoxysilane; γ-glycidoxypropyltrimethoxysilane, β- Epoxysilanes such as (3,4-epoxycyclohexyl) ethyltrimethoxysilane; vinyl type unsaturated group-containing silanes such as vinyltriethoxysilane, γ-methacryloyloxypropyltrimethoxysilane and γ-acryloyloxypropylmethyldimethoxysilane. Chlorine-containing silanes such as γ-chloropropyltrimethoxysilane; isocyanate-containing silanes such as γ-isocyanatopropyltriethoxysilane and γ-isocyanatopropylmethyldimethoxysilane; Dimethoxysilane, trimethoxysilane, although such hydrosilane such as methyl diethoxy silane and the like, the present invention is not limited only to these examples.

As the combination of the polymer having a Y functional group and the compound having a Y'functional group and a crosslinkable silicon group, particularly, a polymer having an isocyanate group and an amino group-containing silane or a mercapto group-containing silane is used. And a combination of a vinyl type unsaturated group-containing polymer and hydrosilanes are preferable. Furthermore, in the above, a combination of polypropylene oxide having an allyl ether group at the molecular end and hydrosilanes is particularly preferable. In the above, the hydrosilylation reaction is carried out using a platinum compound as a catalyst, whereby the vinyl group and the hydrosilyl group react with each other and the silyl group can be introduced into the polymer.

The number of crosslinkable silicon groups in the rubber-based organic polymer used in the present invention is 1.1 or more on average per molecule of the rubber-based organic polymer, but it is clearly adhered to the cementitious base material. It is preferable that the average number is 1.2 or more in order to exert the effect of improving the crosslinking property. If the number of such crosslinkable silicon groups is too large, the crosslinking density becomes high and the rubber elasticity decreases. Since the effect of improving the adhesiveness developed in the cementitious base material tends to decrease, an average of 6 or less,
The average number is preferably 4 or less.

The rubber-based organic polymer has a number average molecular weight of about 500 to 50,000, especially 10
A liquid form of about 00 to 20000 is preferable from the viewpoint of easy handling.

In the present invention, the rubber-based organic polymer in which the crosslinkable silicon group is a group containing a silicon atom having a hydroxyl group, the crosslinkable silicon group contains a silicon atom having a hydrolyzable group. It can also be obtained by hydrolyzing a rubber-based organic polymer as a group.

In the rubber-based organic polymer used in the present invention, since the molecular chain length between the cross-linking points in the formed cured product becomes long, properties such as rubber elasticity are likely to be effectively exhibited, and the present invention is particularly preferable. From the viewpoint that the effect of improving the adhesiveness exhibited by the composition obtained by using the reinforcing agent is easily exhibited, it is preferable that the crosslinkable silicon group is present at the molecular end.

As a typical example of the rubber-based organic polymer,
For example the formula:

[0045]

[Chemical 7]

(Wherein n represents an integer of 1000 to 15000), a compound of the formula:

[0047]

[Chemical 8]

(Wherein p is an integer of 1000 to 15000), a compound of the formula:

[0049]

[Chemical 9]

(In the formula, q represents an integer of 1000 to 15000), and the like. These can be used alone or in admixture of two or more.

If the content of the rubber-based organic polymer in the reinforcing agent of the present invention is too small, the effect of improving the adhesiveness due to the use of such a reinforcing agent will not be sufficiently exhibited, so that it is usually 40. It is preferably not less than 60% by weight, especially not less than 60% by weight.

The rubber-based organic polymer can be used alone in the reinforcing agent of the present invention.
In addition to the rubber-based organic polymer, various additives can be appropriately blended within the range that does not impair the object of the present invention. Incidentally, such additives may be added to the reinforcing agent before mixing the reinforcing agent to the cementitious base material described below, or may be added to these mixtures after mixing the reinforcing agent with the cementitious base material. Good.

Typical examples of the above additives include fillers, polymer plasticizers, silanol condensation catalysts, antioxidants, ultraviolet absorbers, lubricants, pigments and foaming agents. Examples of the filler include water powder, pulp,
Cotton chips, glass fiber, carbon fiber, mica, walnut shell powder, chaff powder, graphite, diatomaceous earth, clay, fume silica, precipitated silica, silicic anhydride, carbon black, calcium carbonate, clay, talc, titanium oxide,
Examples include magnesium carbonate, quartz, fine aluminum powder, flint powder, zinc dust and the like.

As the reinforcing agent of the present invention, the rubber organic polymer may be used in any state, for example, as it is, in a state dissolved in an organic solvent, in a state emulsified in water, or in a state dispersed in water. However, among these, it is preferable to use in a state of being emulsified or dispersed in water from the viewpoint of being easily mixed with the cementitious base material, and particularly used in the state of being emulsified. It is preferable.

When emulsifying the rubber-based organic polymer, a surfactant is usually used. As such a surfactant, any of anionic, cationic, nonionic and amphoteric surfactants can be used.

Examples of the surfactant include fatty acid soap, higher alcohol sulfate ester salt, higher alcohol phosphate ester salt, alkyl sulfonate, alkylbenzene sulfonate, dinaphthylmethane disulfonate, N-methylalkyl taurate. , Alkyl sulfosuccinate, polyoxyethylene alkyl ether sulfate ester salt, polyoxyethylene alkylphenol ether sulfate ester salt, N-acyl sarcosinate salt, alkyl amine salt, trimethyl alkyl ammonium salt, alkyl dimethyl benzyl ammonium salt, alkyl viridinium salt , Polyoxyethylene alkylamino ether, alkyl imidazoline, polyoxyethylene alkyl ether, polyoxyethylene alkylphenol ether, polyoxy Styrene fatty acid esters, polyoxyethylene alkyl thioethers, alkylolamides, polyoxyethylene - polyoxypropylene block copolymers, fatty acid sorbitan esters, polyoxyethylene sorbitan alkylate, alkyl betaines,
Examples thereof include N-alkyl (aminoethyl) glycine, which may be used alone or in combination of two or more, but the present invention is not limited to these examples.

The amount of the surfactant used is not particularly limited, but is usually about 1 to 30 parts, especially about 5 to 20 parts, relative to 100 parts of the strengthening agent (parts by weight, the same hereinafter). Is preferred. Further, the amount of water used when emulsifying or dispersing the rubber-based organic polymer is not particularly limited, but as disclosed in, for example, JP-A-59-6219, it is almost the same as the rubber-based organic polymer. It is preferable that the amounts are equal.

The surfactant may be added to the rubber-based organic polymer together with water, and the rubber-based organic polymer is mixed with the cementitious base material described below and then added to these mixtures. However, there is no particular limitation.

The composition of the present invention can be obtained using the cementitious base material reinforcing agent and the cementitious base material.

The cementitious base material used in the present invention is, for example, those exemplified above, and the cement used in the cementitious base material such as mortar and cement paste is not particularly limited. , Early strength Portland cement, super early strength Portland cement, moderate heat Portland cement,
Various Portland cements such as sulfate resistant Portland cements and white iron Portland cements; blast furnace cements, silica cements, fly ash cements, alumina cements, solidit, calcium silicates and other cements; can be obtained by combining two or more of these cements. Mixed cement: Cement in which an inorganic substance such as gypsum is mixed with these cements can be mentioned.

Further, normal water is used for the mortar and cement paste, and the mortar may contain normal sand and fine aggregate. The effect of improving the adhesiveness exhibited by the reinforcing agent of the present invention hardly changes even when the cementitious base material contains a reinforcing fibrous material or coarse aggregate.

As the mortar, for example, 100 parts of cement and about 200 to 350 parts of fine aggregate and about 50 to 300 parts of water are preferably used, and the cement paste is, for example, cement. A mixture of about 20 to 200 parts of water with respect to 100 parts is preferably used.

The compounding ratio of the cementitious base material reinforcing agent to the cementitious base material in the composition of the present invention varies depending on the intended use of the composition, and therefore cannot be unconditionally determined. If the compounding amount of the agent is too small, the effect of improving the adhesiveness of the obtained composition to the inorganic base material tends to be less likely to be expected, and therefore, the ratio of 2 to 100 parts of cement in the cementitious base material tends to be reduced. More than 5 parts, preferably 5 parts or more,
If it is too much, it is uneconomical and the elastic modulus of the composition after curing tends to decrease, so that it is 30% with respect to 100 parts of cement in the cementitious base material.
It is preferably not more than 15 parts, especially not more than 15 parts.

In addition to the above-mentioned reinforcing agent and cementitious base material, the composition of the present invention contains a catalyst such as a tin-based catalyst such as dibutyltin dilaurate in order to accelerate the crosslinking reaction of the reinforcing agent. May be. The amount of the catalyst blended is preferably about 0.1 to 5 parts with respect to 100 parts of the reinforcing agent.

Further, the composition of the present invention may contain, for example, an antifoaming agent or an air entraining agent, depending on its use.
Chemicals such as various additives for concrete such as a water reducing agent, a fluidizing agent, a quick-setting agent, and a shrinkage reducing agent can be appropriately mixed.

The method for preparing the composition of the present invention is not particularly limited, and includes, for example, cement, water, sand if necessary,
After kneading fine aggregate etc. to prepare cementitious base material,
Add a strengthening agent before the cementitious base material hardens,
Further, there are a method of stirring, a method of simultaneously kneading cement, water, sand, fine aggregate and the like and a reinforcing agent.

The composition thus obtained can be cured and hardened in the same manner as a cement composition is usually cured. However, the composition of the present invention can be used at low or high temperatures, in steam or in water. It is also possible to cure under conditions.

Since the composition of the present invention contains a reinforcing agent for cementitious base materials, the composition of the present invention has an extremely high fluidity as compared with a composition containing no such reinforcing agent. Since the increase in viscosity of the kneaded product is small even in the summer, there is an advantage that workability in, for example, a casting method or an adhesive method, which will be described later, is markedly improved, and in particular, the trowel is easily separated.

The casting method of the present invention is characterized in that the composition is cast on an inorganic substrate.

Examples of the inorganic base material include, for example, slate formed from the cementitious base material, concrete such as ALC and PC, and ceramics, stone materials, bricks, and iron flat stones. The invention is not limited to only these examples.

In the driving method of the present invention, for the purpose of paving, repairing, waterproofing, etc., for example, the surface of the inorganic base material or the defective portion is appropriately coated with the composition, and then the composition is appropriately cured and cured. Not only the method but also a method of splicing the inorganic base materials with each other by appropriately encapsulating the composition in a gap or the like formed in the inorganic base material and then appropriately curing and curing the composition.

The amount of the composition used when the composition is cast on the inorganic base material is not particularly limited, and may be appropriately adjusted according to the intended use.

The bonding method of the present invention is characterized by bonding an inorganic base material and an adherend through the composition.

Examples of the inorganic base material include those exemplified as the base material used in the above-mentioned construction method, and examples of the adherend material include building civil engineering materials such as tiles, stones, and iron materials. However, the present invention is not limited to such examples.

The bonding method of the present invention may be, for example, a method in which the composition is appropriately coated on the surface of an inorganic base material, an adherend is loaded on the composition, and then the composition is appropriately cured and cured. Can be given.

The amount of the composition used when adhering the inorganic substrate and the adherend through the composition is not particularly limited, and may be appropriately adjusted so that the two are sufficiently adhered. .

As described above, in the casting method and the bonding method of the present invention, the above-mentioned composition exhibiting extremely excellent adhesiveness is used. Therefore, the driving method of the present invention can be applied to the outer wall of a factory, a warehouse or the like. Pavement of floors such as parking lots and stairs,
It can be preferably used for repair work, waterproof work for wall surfaces of water tanks, pools, buildings, etc., for example, for adjusting the foundation of concrete etc., and the bonding method of the present invention can be used for bonding tiles, for example. It can be suitably used for interior / exterior construction of buildings, soundproofing of steel girders, lining of cast iron pipes, etc.

Next, the reinforcing agent for cementitious base material of the present invention, the composition containing the same, and the construction method and bonding method using the composition will be described in more detail based on experimental examples and examples. However, the present invention is not limited to such experimental examples and examples.

Experimental Example 1 Formula as a strengthening agent:

[0080]

[Chemical 10]

Polypropylene oxide having an average of two crosslinkable silicon groups per molecule (number average molecular weight of 8000) represented by the formula (10) was used, and polyoxyethylene nonylphenol ether was used as a surfactant in an amount of 10 parts per 100 parts of the reinforcing agent. After adding and dissolving, water is used as a toughener 10.
100 parts was added to 0 parts, and the mixture was dispersed at 10,000 rpm for 10 minutes using a homogenizer to obtain a uniform emulsion (solid content concentration: 52% by weight).

The emulsion thus obtained was allowed to stand at room temperature for 3 weeks and then visually observed. As a result, no sedimentation or aggregation of particles was observed in the emulsion and it was stable.

Example 1 Experimental Example 1 with respect to 100 parts of ordinary Portland cement
The reinforcing agent emulsion (solid content concentration) obtained by mixing 10 parts of polyoxyethylene nonylphenol ether and 100 parts of water with 100 parts of polypropylene oxide having an average of 2 crosslinkable silicon groups per molecule as used in (1). 48 parts by weight) and 23.3 parts of water were added and kneaded to obtain a composition in which a cement paste and a reinforcing agent were mixed.

Next, the adhesiveness of the obtained composition was examined as follows.

Thickness 5 mm, vertical 50 mm, horizontal 50 mm
On the glass plate of, 10 mm wide using a spacer made of polyethylene so that the thickness after curing is 10 mm,
After the composition was cast in a space having a depth of 10 mm and a length of 50 mm, it was cured at room temperature for 7 days and cured.

After curing, the spacer was removed and the composition was peeled off from the glass plate, but it was stuck to the glass plate and could not be peeled off unless it was strongly hit with a mallet. From this, it was found that the composition of the present invention had excellent adhesiveness to the glass plate.

Example 2 Experimental Example 1 with respect to 100 parts of ordinary Portland cement
The reinforcing agent emulsion (solid content concentration) obtained by mixing 10 parts of polyoxyethylene nonylphenol ether and 100 parts of water with 100 parts of polypropylene oxide having an average of 2 crosslinkable silicon groups per molecule as used in (1). 49% by weight) 20.4 parts and Toyoura standard sand 30
0 parts and 60 parts of water were added and kneaded to obtain a composition in which a reinforcing agent was mixed with mortar.

Next, the adhesiveness of the obtained composition was examined in the same manner as in Example 1. As a result, as in Example 1,
The composition after curing adhered to the glass plate and could not be peeled off from the glass plate unless it was strongly struck with a mallet. From this, it was found that the composition of the present invention had excellent adhesiveness to the glass plate.

Comparative Examples 1 and 2 In Example 1, no reinforcing agent emulsion was used and the amount of water was changed to 46 parts (Comparative Example 1), or in Example 2, no reinforcing agent emulsion was used. (Comparative Example 2), a composition (cement paste (Comparative Example 1) or mortar (Comparative Example 2)) was obtained in the same manner as in Example 1 or Example 2.

Next, the adhesiveness of the obtained composition was examined in the same manner as in Example 1. As a result, the composition after curing is
All of them were very easily peeled off from the glass plate in the state of the plate as it was. From this, Comparative Examples 1 and 2
It was found that the composition of 1) had adhesiveness to a glass plate.

Example 3 On a surface of a mortar plate having a thickness of 5 mm, a vertical length of 50 mm and a width of 50 mm, a width of 10 mm and a depth of 1 were used by using a spacer made of polyethylene so that the thickness after curing was 10 mm.
After the mortar composition obtained in Example 2 was cast in a space of 0 mm and a length of 50 mm, it was cured at room temperature for 20 days and cured.

The adhesion between the cured product of the mortar composition cast by the casting method and the mortar board was examined in the same manner as in Example 1.

As a result, the cured product of the cast mortar composition was completely adhered to the mortar board and could not be peeled off from the mortar board even if the cured product was strongly hit with a mallet. From this, it was found that the mortar composition cast by the casting method of the present invention and the mortar plate have excellent adhesiveness.

Example 4 The mortar composition obtained in Example 2 was obtained in the same manner as in Example 3 so that the thickness after curing was 5 mm on the surface of the same mortar plate as that used in Example 3. After placing objects,
On this composition, thickness 5 mm, length 25 mm, width 25 m
The m interior tile was fixed by pressure so that the flat surface was in contact with the composition, spread, and allowed to cure at room temperature for 20 days, and the composition was cured to bond the mortar board and the tile.

In order to examine the adhesiveness between the mortar board and the tile adhered by the adhering method, the tile was peeled off by impacting the tile with a mallet in the same manner as in Example 3. It was destroyed and could not be peeled off. From this, it was found that the mortar plate and the tile bonded by the bonding method of the present invention have excellent adhesiveness.

[0096]

INDUSTRIAL APPLICABILITY The reinforcing agent for cementitious base material of the present invention can remarkably improve the adhesiveness between the cementitious base material such as mortar and cement paste and the inorganic base material such as concrete and stone. Therefore, the composition containing the cementitious base material reinforcing agent and the cementitious base material has an effect of exhibiting extremely excellent adhesiveness as compared with a normal cement composition.

Therefore, the casting method and the bonding method of the present invention using the above composition are suitable for various construction civil works such as pavement of buildings, repair work, interior and exterior work, waterproof work, soundproof work, etc. The effect that can be adopted in.

Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location C04B 24:32) A (72) Inventor Hozumi 3-2-1 Nakanoshima, Kita-ku, Osaka City Kanebuchi Kagaku Industry Co., Ltd.

Claims (11)

[Claims] 1. A toughening agent for cementitious base materials, which comprises a rubber organic polymer having an average of 1.1 or more crosslinkable silicon groups per molecule. 2. A crosslinkable silicon group is represented by the general formula (I): (In the formula, X is a hydroxyl group, a hydrolyzable group, a hydrogen atom or a halogen atom, R ¹ is a monovalent hydrocarbon group having 1 to 20 carbon atoms or a general formula: R ² ₃ Si—O— (wherein, R ²
Represents a monovalent hydrocarbon group having 1 to 20 carbon atoms), a is 0, 1, 2 or 3, b is 0, 1 or 2 (where 1 ≦ a + b), m Is a group represented by 0 or an integer of 1 to 18), The reinforcing agent for cementitious base material according to claim 1. 3. The reinforcing agent for cementitious base materials according to claim 2, wherein X in the general formula (I) is an alkoxyl group. 4. The crosslinkable silicon group has the general formula (II): The reinforcing agent for cementitious base material according to claim 1, which is a group represented by the formula (wherein X and R ¹ are the same as described above, and d is 1, 2 or 3). 5. The reinforcing agent for cementitious base materials according to claim 4, wherein X in the general formula (II) is an alkoxyl group. 6. The reinforcing agent for cementitious base materials according to claim 1, wherein the rubber-based organic polymer is a polyether having an average of 1.1 or more crosslinkable silicon groups per molecule. Agent. 7. The cementitious base material reinforcing material according to claim 1, 2, 3, 4 or 5, wherein the rubber-based organic polymer is polypropylene oxide having an average of 1.1 or more crosslinkable silicon groups per molecule. Agent. 8. A method according to claim 1, 2, 3, 4, 5, 6 or 7.
A composition comprising the cementitious base material reinforcing agent as described above and a cementitious base material. 9. A casting method, wherein the composition according to claim 8 is cast on an inorganic substrate. 10. An adhesive construction method comprising adhering an inorganic base material and an adherend through the composition according to claim 8. 11. The bonding method according to claim 10, wherein the adherend material is a building civil engineering material.