JPH0829972B2 - Bonding promoter / protective agent and inorganic material bonding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a binding promoting / protecting agent for a second inorganic material for binding with a hydraulic or air-hardening first inorganic material, and the binding promoting / protecting agent. The present invention relates to a method of bonding inorganic materials to each other using an agent.

[Conventional technology]

Conventionally, there is no binding promoting / protecting agent for the second inorganic material, and no method for binding the inorganic materials using the binding promoting / protecting agent has been considered.

[Problems to be solved by the invention]

Therefore, after the first inorganic material and the second inorganic material are combined, for example, as water infiltrates into the first inorganic material for a long period of time, the infiltrated water becomes alkaline liquid due to the alkaline component in the first inorganic material. , The second inorganic material is dissolved by the alkaline liquid, or the water that enters the first inorganic material is
The oxygen or acid gas in the air is dissolved to become an oxidizing or acidic liquid, and the liquid oxidizes the second inorganic material, weakening the bonding strength between the two inorganic materials or weakening the strength of the second inorganic material itself. I often did.

An object of the present invention is to provide a binding promoting / protecting agent that protects the second inorganic material from moisture invading from the outside while binding the first inorganic material and the second inorganic material, and uses the binding promoting / protecting agent. In addition, a method of further increasing the bonding strength between the first inorganic material and the second inorganic material is provided.

[Means for solving problems]

The characteristic constitution of the bond promoting and protecting agent in the first aspect of the present invention is that at least one kind of silicate compound is added to a decomposition liquid obtained by hydrolyzing at least one kind of organoalkoxysilane with water to obtain a pH value of 9%. It is because it contains an aqueous solution adjusted to -13 and a surfactant, and its action and effect are as follows.

[Action]

That is, the decomposition liquid obtained by hydrolyzing at least one of the organoalkoxysilanes with water is uniformly bound to the surface of the second inorganic material by the silanol group, and the hydrophobic group appearing on the surface side of the second inorganic material causes the decomposition of the second inorganic material. Although it can be protected, it is unstable and weakly acidic, and generally has a weak affinity with the first inorganic material containing a large amount of alkaline components.
The hydrophobic group appearing on the surface side of the second inorganic material moves away from the first inorganic material containing water before curing, and eventually reduces the bonding strength with the first inorganic material. Therefore, by adding a silicate compound to the decomposition solution and adjusting the pH to 9 to 13, the decomposition solution is stabilized even at a high concentration and is uniformly bonded to the surface of the second inorganic material, and the first The affinity with the equipment is also strengthened, and even if a hydrophobic group appears on the surface side of the second inorganic material due to the bond with the silanol group, the first inorganic material before curing is brought closer to the second inorganic material by the surfactant. Increases the bond strength between both inorganic materials.

〔The invention's effect〕

Therefore, the surface of the second inorganic material is uniformly protected, for example, the second inorganic material is prevented from being invaded due to moisture entering the first inorganic material from the outside, and the strength of the second inorganic material is maintained for a long time. Can be kept high. Moreover, the bondability with the first inorganic material can be improved.

Moreover, by using at least one of the silicate compounds to adjust the pH of the decomposition solution to 9-13, compared to the use of normal alkaline substances such as sodium hydroxide and potassium hydroxide. As a result, the bondability with the second inorganic material is good, and the bondability between the two inorganic materials can be kept high as a whole.

[Means for solving problems]

The characteristic means of the method for bonding inorganic materials to each other in the second invention of the present invention is that a bonding promoter / protective agent for a second inorganic material for bonding with a hydraulic or gas-hardening first inorganic material is selected from organoalkoxysilanes. At least one kind of silicate compound is added to a decomposition liquid obtained by hydrolyzing at least one kind with water, and an aqueous solution adjusted to pH 9 to 13 is mixed with a surfactant to form and promote the binding and protection thereof. To attach the agent to the surface of the second inorganic material and dry it, and after the drying, bring the second inorganic material into contact with the first inorganic material to bond both inorganic materials by the action of the binding promoting and protecting agent. And its effects are as follows.

[Action]

That is, the decomposition liquid obtained by hydrolyzing at least one kind of organoalkoxysilane with water is uniformly bound to the surface of the second inorganic material by the silanol group, and the hydrophobic group appearing on the surface side causes the second non-existence. The equipment can be protected, but it is unstable and weakly acidic, and generally has a weak affinity with the first inorganic material that has a large amount of alkaline components. In addition, the hydrophobic group appearing on the surface side of the second inorganic material is The first inorganic material containing water before curing is moved away, and eventually the bonding strength with the first inorganic material is reduced. On the other hand, by adding a silicate compound to the decomposition liquid and adjusting the pH to 9 to 13, the decomposition liquid is stabilized even at a high concentration and is uniformly bonded to the surface of the second inorganic material, The affinity with the first inorganic material can also be strengthened.

Next, the pH-adjusted aqueous solution is mixed with a surfactant to form a bond promoting / protecting agent in which the hydrophobic group in the decomposition solution and the surfactant are uniformly affinitized. If it is attached to the surface of the second inorganic material and dried, the silanol groups of the organoalkoxysilane are uniformly bonded to the surface of the second inorganic material, and the hydrophobic groups bonded to the silanol groups in order mainly toward the outside thereof, And the surfactant having an affinity for the hydrophobic group are evenly arranged on the surface side of the second inorganic material,
As a result, the hydrophilic groups of the surfactant are evenly arranged outward. Therefore, after drying the attached bond promoting and protecting agent,
When the second inorganic material is brought into contact with the first inorganic material, the first inorganic material containing water before curing approaches the hydrophilic group of the surfactant, and as water evaporates and the first inorganic material cures. , Is uniformly bonded to the surface of the second inorganic material.

〔The invention's effect〕

Therefore, the surface of the second inorganic material is uniformly protected, and as described above, for example, the second inorganic material is prevented from being invaded due to the moisture entering the first inorganic material from the outside, and the second inorganic material is prevented. The strength of the equipment can be maintained high for a long time,
By using at least one of the silicate compounds to adjust the pH to 9-13, compared to the use of normal alkaline substances such as sodium hydroxide and potassium hydroxide, the second inorganic material Improves the bondability with.

In addition, for example, the pH-adjusted aqueous solution is added to the second
It is also possible to attach it to unmachined material, dry it, and then further attach a surfactant after drying, but in this case, the second
The hydrophilic group of the surfactant approaches the water molecules left between the plurality of silane compounds bonded to the surface of the untreated material through the silanol group, and the hydrophilic group is outwardly directed to the surface of the second inorganic material. In the method of the present invention, the binding promoter / protective agent already mixed with the surfactant is secondarily added.
By attaching it to unmachined material and drying it, the hydrophilic group becomes the second
It is easy to line up uniformly on the surface of equipment-free,
The bonding strength between the second inorganic materials can be improved.

After all, according to the method of the present invention, the bonding strength between the first inorganic material and the second inorganic material can be further improved while protecting the second inorganic material.

〔Example〕

 Next, examples of the present invention will be described.

For the second inorganic material such as glass fiber, steel fiber, rebar, steel frame for strengthening the whole by combining with the first inorganic material consisting of hydraulic material such as cement and gypsum, and air-hardening material such as Sicky, A bonding promoting / protecting agent for protecting the surface of the second inorganic material and increasing the bonding strength between the two inorganic materials is formed by the following adjusting method.

An organoalkoxysilane represented by the general formula R ¹ aR ² bSi (OR ³ ) _4- ab (wherein R ¹ is a methyl group, an ethyl group, an amyl group, or a phenyl group, and R ² is an ethyl group, an amyl group, Or a vinyl group, R ³ is a methyl group, an ethyl group, a propyl group, a butyl group, or an acetyl group, a is 0 to 3, b is 0 or 1, and a + b ≦ 3). Is dissolved in water to be hydrolyzed, and at least one of silicate compounds (for example, lithium silicate, potassium silicate, sodium silicate, etc.) is added to the decomposed solution to obtain a pH of 9
The pH is adjusted to an alkalinity of 13 to 13 (preferably pH 11 to 12), and the aqueous solution is mixed with a nonionic surfactant whose hydrophobic group is dimethyl silicone oil and whose hydrophilic group is polyether.

Incidentally, 2 to 20% of the organoalkoxysilane and 2 to 20% of the silicate compound are suitable, and metal oxides (for example, zinc oxide, aluminum oxide, titanium oxide,
Alternatively, tungsten oxide or the like) may be added as necessary.

0.5% or more (desirably 2%) of the surfactant is used.
~ 5%) is suitable, and is called a pendant type with a structure in which a polyether group is added as a side chain. And a so-called end-modified type in which a polyether group is added to the end of dimethyl silicone oil In both cases, the surface tension is extremely low at about 20 dynes / cm, so that the surfactant effect on water is extremely remarkable as compared with the organic surfactant.

Next, as an example of the aqueous solution, 4 parts by weight of methyltrimethoxysilane is added to 78 parts by weight of water for hydrolysis, and 12 parts by weight of lithium silicate and 2 parts by weight of sodium silicate are added to the decomposed solution. Further, 2 parts by weight of aluminum oxide was added to prepare the solution, and this aqueous solution was applied to the surface of a degreased soda glass plate, dried at 60 ° C for 4 hours, and allowed to stand for 1 week under normal conditions (25 ° C 65% RH). The results of a comparative experiment between those treated with and those without treatment are shown.

Wetting effect (adhesion effect) of glassy surface is Table 3 below shows the results of a bending test by the mortar bar method using glassy silica sand surface-treated with the above aqueous solution and untreated glassy silica sand.

The surface treatment was forced drying at 60 ° C for 4 hours, and the sample
Put in a 200 mesh brass sieve and dry 2
It was vibrated every 0 minutes for 1 minute.

The overall formulation is The mortar bar curing conditions are: And

From the above Tables 2 and 3, it can be confirmed that the strength is improved by improving the adhesive force between the cement paste and the glassy material.

[Another embodiment]

The second inorganic material is not only embedded or mixed in the first inorganic material as an aggregate or a reinforcing material, but also simply adhered to the surfaces (for example, the second inorganic material is a marble plate material or a glass plate, If the first inorganic material is cents, simply
In the case where cement is brought into contact with the surface of a marble plate material or a glass plate to bond them, and in that case also, a bonding promoter and a protective agent are attached to the surface of the second inorganic material to bond the two inorganic materials together. The bond strength may be improved.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Masao Yokoi 4-27, Honmachi, Higashi-ku, Osaka City, Osaka Prefecture Takenaka Corporation, Osaka Main Store (72) Innovator, Nobunao Murakami 3-chome, Mihara-cho, Minamikawachi-gun, Osaka Prefecture No. 1-8 Takenaka Corporation Technical Research Institute Osaka Branch (72) Inventor Kunitomi Tanaka, 4-8 Doshomachi, Higashi-ku, Osaka-shi, Osaka Prefecture Nihon Sheet Glass Co., Ltd. (72) Inventor Hideo Takashima East, Osaka-shi, Osaka Prefecture 4-8 Dosho-machi, Nippon Sheet Glass Co., Ltd. (72) Inventor Kiyoshi Asahi 4-8, Dosho-cho, Higashi-ku, Osaka City, Osaka Prefecture (72) Inventor, Nihon Sheet Glass Co., Ltd. Keiichi Yugaki, Koto-ku, Tokyo Saga 1-9-14 Masaru Kogyo Co., Ltd. (56) Reference JP-A-53-64234 (JP, A) JP-A-62-108760 (JP, A)

Claims (8)

[Claims] 1. A binding promoting protective agent for a second inorganic material for binding with a hydraulic or air-hardening first inorganic material,
Bonding promotion including a surfactant and an aqueous solution in which at least one kind of silicate compound is added to a decomposition liquid obtained by hydrolyzing at least one kind of organoalkoxysilane with water, and a surfactant. Also a protective agent. 2. The organoalkoxysilane is R ¹ aR ² bSi (OR ³ ) _4- ab (wherein R ¹ is a methyl group, an ethyl group, an amyl group, or a phenyl group, and R ² is an ethyl group, an amyl group). A group or a vinyl group, R ³ is a methyl group, an ethyl group, a propyl group, a butyl group, or an acetyl group, and a is 0 to
3, b is 0 or 1, and a + b ≦ 3). The binding promoting and protecting agent according to claim 1, wherein 3. The silicate compound is lithium silicate,
The binding promoter and protective agent according to claim 1 or 2, which is one or more selected from the group consisting of potassium silicate and sodium silicate. 4. The non-ionic surfactant according to claim 1, wherein the surfactant is a dimethyl silicone oil as a hydrophobic group and a polyether is as a hydrophilic group. A binding promoter and protective agent. 5. A decomposing liquid obtained by hydrolyzing at least one kind of organoalkoxysilane with water as a binding promoter and protective agent for a second inorganic material for binding with a hydraulic or gas-hardening first inorganic material. At least one kind of silicate compound is added to form an aqueous solution of which the pH is adjusted to 9 to 13 and a surfactant, and the binding promoting and protecting agent is attached to the surface of the second inorganic material. And drying, and after the drying, the second inorganic material is brought into contact with the first inorganic material, and the two inorganic materials are bonded by the action of the bonding promoter / protective agent. 6. The method for bonding inorganic materials according to claim 5, wherein the first inorganic material is cement and the second inorganic material is glass fiber. 7. The method of joining inorganic materials according to claim 5, wherein the first inorganic material is cement and the second inorganic material is steel fiber. 8. The method for joining inorganic materials according to claim 5, wherein the first inorganic material is gypsum or sickle.