JPH0762141A - Quick-drying liquid composition and adhesive - Google Patents

Abstract

(57) [Abstract] [Purpose] By adding dispersed particles having extremely high dispersion and flow characteristics to a liquid composition, the amount of a dispersion medium or a solvent can be significantly reduced and a sufficient quick drying property can be achieved. The present invention provides a quick-drying liquid composition that can be used, and an adhesive using the quick-drying liquid composition. A spherical spherical silicon dioxide powder having an average particle size of 0.05 to 10 μm and a particle size distribution within one digit width in a liquid composition which forms a solid by drying or reacting a solvent or a dispersion medium component. Alternatively, aluminum oxide powder is added. Since the ceramic powder according to the present invention has a specific average particle size and particle size distribution and is spherical, it has very good fluidity and dispersibility.
It becomes possible to add a large amount of ceramic powder without impairing the flow characteristics and the like, and it is possible to achieve sufficient quick drying property.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is suitable for use in adhesives, paints, sealants, cements, etc., and is a fast-drying liquid composition that forms a solid by drying or reacting with a solvent or a dispersion medium component. And an adhesive using the quick-drying liquid composition.

[0002]

2. Description of the Related Art Liquid compositions prepared by dispersing or dissolving solid component elements in a dispersion medium or solvent have been known. This liquid composition is applied so as to widely cover the surface of the object to be treated due to the fluidity of the liquid dispersion medium or solvent, and then the dispersion liquid or solvent is evaporated to dryness,
Alternatively, a solid is formed on the surface of the object to be treated by the reaction.

[0003] Such liquid compositions generally include adhesives, paints, sealants, cements, etc., all of which have quick-drying properties in order to improve workability after application of the liquid composition. Is desirable. As one means for obtaining the quick-drying property of the liquid material, it is considered to reduce the amount of the dispersion medium or the solvent. Specifically, by reducing the amount of the dispersion medium or the solvent to about half, the effect of quick drying becomes remarkable. However, when the amount of the dispersion medium or the solvent is simply reduced, the fluidity of the liquid material is reduced accordingly, and the characteristics of the liquid material are lost.

Therefore, in order to reduce the amount of the dispersion medium or the solvent without reducing the fluidity of the liquid material as much as possible, a filler (dispersed particles) having good fluidity suitable for the dispersion medium or the solvent is added to the liquid material. Can be added to. Here, in order to sufficiently obtain the effect of quick drying, if it is attempted to reduce the amount of the dispersion medium or the solvent to about half by adding the dispersed particles, a large amount of the dispersed particles (50% by weight of the total amount of the dispersed particles) is obtained. %)) To be added. And, as the characteristics of the dispersed particles that can be added in a large amount to the liquid composition in this manner, stable in the liquid material,
In addition, it is required that it can be dispersed in a large amount and that it has good fluidity.

In Japanese Patent Laid-Open No. 63-60103, particle diameters of 0.1 to 1 are used as filler dispersion particles to be mixed with a resin material in order to improve the slipperiness and releasability of a resin molded product.
Porous silica-based dispersed particles of 0 μm spherical or cubic shape are disclosed. The silica-based dispersed particles are not added in order to impart quick-drying properties to the fluid composition, and are added to 100 parts by weight of the resin in order to improve the slipperiness and releasability of the resin molded product as described above. To 0.0
It is added at a rate of 01 to 10 parts by weight.

[0006]

However, the above-mentioned Japanese Unexamined Patent Application Publication No.
Since the silica-based dispersed particles disclosed in Japanese Patent Laid-Open No. 3-60103 are porous and not spherical, sufficient fluidity cannot be secured when used as an additive to a liquid substance such as an adhesive or cement. Therefore, if a large amount of the silica-dispersed particles is added to a liquid material in order to obtain sufficient quick-drying property, the fluidity is lowered, and, for example, when it is added to an adhesive, the coating performance is deteriorated. There is a problem.

Therefore, in the past, it was difficult to reduce the amount of the dispersion medium or the solvent and sufficiently achieve the quick-drying property of the liquid composition by adding the dispersed particles to the liquid composition. The present invention has been made in view of the above circumstances, and by adding dispersed particles having extremely high dispersion characteristics and flow characteristics to a liquid composition, it is possible to significantly reduce the amount of the dispersion medium or the solvent. It is a technical problem to be solved to provide a quick-drying liquid composition capable of achieving quick-drying property and an adhesive using the quick-drying liquid composition.

[0008]

The quick-drying liquid composition of the present invention for solving the above-mentioned problems is a liquid composition which forms a solid by drying or reacting a solvent or a dispersion medium component, and has an average particle size of 0.05 to 10 μm, spherical silicon dioxide powder having a particle size distribution within 1 digit width, or true spherical aluminum oxide powder having an average particle size of 0.05 to 10 μm and particle size distribution within 1 digit width is added. It is characterized by being.

Further, the adhesive of the present invention for solving the above-mentioned problems is an adhesive having the above-mentioned quick-drying liquid composition and further foaming it. As the silicon dioxide powder and the aluminum oxide powder, those having an average particle size of 0.05 to 10 μm are used. When the average particle size of these ceramic powders is larger than 10 μm, the ceramic powder is likely to settle in the liquid composition, and a stable dispersion state of high concentration may not be obtained. On the other hand, when the average particle diameter of the ceramic powder is smaller than 0.05 μm, the viscosity of the liquid composition increases too much, a stable dispersed state cannot be obtained, or other components in the liquid composition are adsorbed. The original function of the composition may be deteriorated. From these viewpoints, the average particle size of the ceramic powder is more preferably 0.1 to 5 μm.

In order to secure a stable dispersion state in the dispersion medium or solvent in the liquid composition, it is preferable that the specific gravity of the ceramic powder be as close as possible to the specific gravity of the dispersion medium or solvent. This is because it becomes difficult for the ceramic powder to settle in the dispersion medium or the solvent. The specific gravity of the silicon dioxide powder is 2.
2, and since the specific gravity of the aluminum oxide powder is 3.6, the aluminum oxide powder is more likely to settle than the silicon dioxide powder. Therefore, when using the aluminum oxide powder, from the viewpoint of high dispersibility, It is preferable to reduce the average particle size as compared with the case where silicon powder is used.

The above-mentioned particle size distribution is within one digit width means that the particle size is 1/3 times or more of the average particle size in the volume probability distribution,
It means that the ratio of the ceramic powder which is 3 times or less is 70 vol% or more of the whole ceramic powder, and the standard deviation of the particle diameter is 1/4 or more of the average particle diameter. In the present invention, when the particle size distribution of the ceramic powder is wider than one digit, the fluidity of the ceramic powder is lowered, and there is a possibility that a stable dispersion state of high concentration cannot be obtained.

Further, the above-mentioned true sphere means that it is spherical and the ratio of (maximum diameter) / (minimum diameter) in one spherical body is 1.2 or less. In the present invention, the area occupied by the spherical ceramic powder is preferably 90% or more of the total area of the ceramic powder. When the area occupied by the spherical ceramic powder is less than 90% of the whole area, the fluidity of the ceramic powder is lowered, and there is a possibility that a stable dispersion state of high concentration cannot be obtained.

In the quick-drying liquid composition of the present invention, the above-mentioned silicon dioxide powder is preferably added in an amount of 25 to 75% by weight, and more preferably in an amount of 30 to 70% by weight. If the amount of silicon dioxide powder added is less than 25 wt%, sufficient quick-drying properties cannot be obtained, while if it is more than 75 wt%, the original function is impaired. The total amount of aluminum oxide powder is 45 to 85 wt.
% Is preferably added, and the total amount is 50 to 8
It is more preferable that 0 wt% is added. If the amount of the aluminum oxide powder added is less than 45 wt%, sufficient quick drying cannot be obtained, while if it is more than 85 wt%, the original function is impaired.

The specific average particle size and
Silicon dioxide powder that has a spherical shape and a particle size distribution
Aluminum oxide powder is produced by the metal powder combustion method.
Preferably. For example, JP-A-60-255602
In the publication, metallic silicon powder is provided as a dust cloud in the reaction vessel.
Supply it, ignite it and burn it
A method of making silicon dioxide powder is disclosed. sand
That is, the silicon dioxide powder or aluminum oxide according to the present invention.
For the powder, first fill the reaction vessel with a reaction gas containing oxygen.
Then, disperse the metal powder in this reaction gas and
Dust cloud is formed, and then arc, plasma, chemical flame, etc.
Metal powder is ignited by using an appropriate ignition source.
Decombustion and natural cooling of the metal oxide gas generated by this
Suitable by producing fine metal oxide particles
Can be manufactured. The shape of the dust cloud of metal powder
As a method of formation, metal powder is added to the gas forming the reaction gas.
The method of entrainment and feeding into the reaction vessel is preferably adopted.
In this case, the metal concentration in the dust cloud of metal powder is stable.
Due to the fire, a thicker one is preferred, at least 20 g /
m ³, Usually 500 g / m³Or more, more preferably 100
0 g / m³That is all. Manufactured by the above metal powder combustion method
The metal oxide fine particles that have been formed are particles that have grown during the natural cooling process.
Since it is a child, it has a higher
In comparison, it is rich in surface activity and contributes to improved dispersibility.

[0015]

The quick-drying liquid composition of the present invention contains silicon dioxide powder or aluminum oxide powder having a specific average particle size and particle size distribution and having a true spherical shape.
Since such ceramic powder has good flow characteristics and dispersion characteristics, even if a large amount of the ceramic powder is added to obtain sufficient quick drying property, the fluidity is not impaired, and the characteristics of the liquid composition itself are not deteriorated. It will not be uniform.

Further, in the quick-drying liquid composition of the present invention, since the ceramic powder to be added has a specific average particle size and particle size distribution and has a true spherical shape, the dilatancy effect is obtained especially when the liquid component is small. Is demonstrated. The dilatancy is a phenomenon in which a paste of relatively large particles sucks a liquid into the interior thereof by the action of a sudden strong external force and expands and solidifies. Therefore, when the quick-drying liquid composition of the present invention is applied to an adhesive, a dilatancy effect appears when the adhesive is dried and the initial strength is improved. That is,
Even when the adhesive is in a non-solidified state, the force for peeling off the adherend acts on the adhesive layer, and the dilatancy effect appears, whereby the adhesive is solidified and the initial strength is improved. Further, when the quick-drying liquid composition of the present invention is applied to a coating material, a dilatancy effect appears when the coating material is dried, and it is possible to suppress sagging. That is, the resistance of the paint to the sagging effect acts on the paint in the unsolidified state, and the dilatancy effect appears, whereby the paint is solidified and the sagging drop is suppressed.

Next, since the above-mentioned ceramic powder has a specific particle size distribution, it is easy to form a close-packed structure, so that the cohesive force between the powders becomes strong. Therefore, when the adhesive of the present invention is foamed and applied to the adherend, the agglomerated ceramic powder is firmly held between the uniformly dispersed fine bubbles, and the action of the agglomerated ceramic powder causes Therefore, the bubbles are stably maintained even after the water is evaporated. Therefore, the bulkiness of the foam is maintained for a long time, and the workability at the time of applying the adhesive is improved.

Further, when the foam structure is stably maintained in this way, it becomes easy to control the amount of adhesive applied, and therefore it becomes possible to apply the adhesive uniformly and thinly. This is also advantageous in terms of quick drying.

[0019]

EXAMPLES Examples embodying the present invention will be described below. (Example 1) A silicon dioxide powder (manufactured by Admatex, trade name: Admafine SO-C2) having an average particle size of 0.5 µm and a particle size distribution within one digit width was prepared. This silicon dioxide powder has a particle size of 1 of the average particle size in the volume probability distribution.
The ratio of the silicon dioxide powder that is / 3 times or more and 3 times or less is 95 vol% of the entire silicon dioxide powder, and the particle size distribution is such that the standard deviation of the particle size is 0.4 of the average particle size. . The silicon dioxide powder has a purity of 99.8% or more and a (maximum diameter) / (minimum diameter) ratio of 1.1 or less.

Further, a commercially available woodworking adhesive (manufactured by Konishi Co.,
Commodity: woodwork bond) was prepared. This is composed of 41 wt% of vinyl acetate resin and 59 wt% of water.
15 parts by weight of the above-mentioned silicon dioxide powder, 10 parts by weight of the above-mentioned commercially available adhesive for woodworking, and 1 part by weight of 25% ammonia water were mixed and sufficiently dispersed to prepare a liquid adhesive.
The amount of silicon dioxide powder added was about 58 wt% of the total, and the amount of water in the liquid adhesive was 26 wt% of the total. Moreover, the viscosity of this liquid adhesive is maintained at the same level as the original commercially available adhesive for woodworking by adding 25% ammonia water.

Using the above liquid adhesive, an adhesion-strength test was conducted on a commercially available cardboard for work (a rough surface having a gray surface on one side and a smooth surface having a white surface on the other side). The liquid adhesive is uniformly applied to a range of 25 mm from one end of one 25 mm wide strip-shaped cardboard on the white smooth surface side, and immediately after the other 2
After pressing one end of the 5 mm wide strip-shaped thick paper on the smooth side toward the adhesive with a pressure of 0.5 kg / cm ^{2 for} a predetermined time, the other end of each thick paper is pulled in the longitudinal direction to separate. It was carried out by examining the peel strength up to. Table 1 shows the results of examining the relationship between the adhesive time and the peel strength, with the time of pressing as the adhesive time (drying time). Table 1
Medium, when the peel strength reaches a certain level (6 kg) ○
The mark is shown, and otherwise, the mark is shown.

Comparative Example 1 The same adhesive-strength test as in Example 1 was carried out using the commercially available wood working adhesive of Example 1 as it was. The results are also shown in Table 1. (Comparative Example 1 ′) In place of the silicon dioxide powder (Admafine SO-C2) of Example 1 above, a general crushed silica (Tatsumori Co., trade name: RD-8, average particle size 15 μm) was prepared. did.

15 parts by weight of this pulverized silica, 10 parts by weight of a commercially available woodworking adhesive similar to that used in Example 1 above, 12 parts by weight of pure water, and 1 part by weight of 25% aqueous ammonia were mixed and stirred sufficiently. And dispersed to prepare a liquid adhesive. The amount of silicon dioxide powder added was about 39 wt% of the total, and the amount of water in the liquid adhesive was 50 wt% of the total. In addition,
The water content was higher than that in Example 1 above because the dispersibility of the pulverized silica was poor. Moreover, the viscosity of this liquid adhesive is maintained at the same level as the original commercially available adhesive for woodworking by adding 25% ammonia water.

Using the obtained liquid adhesive, the above-mentioned Example 1 was used.
The same adhesion-strength test was performed. The results are also shown in Table 1.

[0025]

[Table 1] As is clear from Table 1, the adhesive according to the present Example 1 in which a specific amount of a specific silicon dioxide powder was added was compared with the adhesive according to Comparative Example 1 in which the silicon dioxide powder was not added (bonding time ( It can be seen that the drying time) was shortened to about 1/3. The adhesive according to Example 1 has an average particle size of 15
It can be seen that the adhesion time was shortened to less than half compared to that of Comparative Example 1'in which the pulverized silica of μm was added.

In Example 1, the addition amount of the silicon dioxide powder was set to about 58 wt% of the entire liquid composition, but the original function is obtained when the addition amount of the silicon dioxide powder is in the range of 30 to 70 wt%. It was also confirmed that the effect of quick-drying appeared without significantly affecting it. (Example 2) A commercially available adhesive (manufactured by Konishi Co., Ltd., product: quick-drying bond for paper) was prepared. This is vinyl acetate resin 43w
It is composed of t% and 57 wt% of water.

Silicon dioxide powder 16 similar to that of Example 1
Parts by weight, 6 parts by weight of the above-mentioned commercially available general-purpose adhesive, 4 parts by weight of pure water, and 1 part by weight of 25% ammonia water were mixed and sufficiently stirred to disperse the liquid adhesive.
The amount of silicon dioxide powder added was about 59 wt% of the total, and the amount of water in the liquid adhesive was 31 wt% of the total. Moreover, the viscosity of this liquid adhesive is maintained at the same level as the original commercially available adhesive for woodworking by adding 25% ammonia water.

An adhesion-strength test between wood and a concrete block was conducted using the above liquid adhesive. This is 25
The above liquid adhesive is evenly applied to a range of 25 mm from one end of a tree with a width of mm to a thickness of about 1 mm, and immediately after that, the other 25 mm is applied.
After pressing one end of the width of the concrete block against the adhesive-coated surface for 1 minute at a pressure of 0.2 kg / cm ² , it was examined whether the other ends of the wood and the concrete block were pulled in the longitudinal direction and peeled from each other. As a result, it was confirmed that a certain strength level (10 kg) was reached even when the test was conducted for 1 minute immediately after pressing for 1 minute.

Comparative Example 2 The same adhesive-strength test as in Example 2 was conducted using the commercially available adhesive of Example 2 as it was. As a result, the same strength level as in Example 2 was reached when the test was conducted after pressing for 45 minutes. As a result, the adhesive according to the present Example 2 to which the specific silicon dioxide powder was added in a predetermined amount had an adhesion time (drying time) of about 1 as compared with the adhesive according to Comparative Example 2 to which the silicon dioxide powder was not added. It can be seen that it has been shortened to / 20.

In Example 2, the amount of silicon dioxide powder added was approximately 59 wt% of the total liquid composition, but the amount of silicon dioxide powder added was 30-70 wt% of the total amount of the adhesive. It was also confirmed that the quick-drying effect appeared without significantly impairing the function of. (Example 3) A commercially available white water-based paint (manufactured by Kansai Paint Co., Ltd .: product paint) was prepared. This is composed of 60 wt% of synthetic resin and pigment and 40 wt% of water.

Silicon dioxide powder 32 similar to that of the first embodiment
A liquid coating material was prepared by the same procedure as in Example 2 above, except that the weight ratio of the commercially available white water-based paint was 25 parts by weight, pure water was 7 parts by weight, and 25% ammonia water was 2 parts by weight. The total amount of silicon dioxide powder added was about 48 wt.
%, And the water content in the liquid paint is 29 wt% of the whole. Moreover, the viscosity of this liquid paint is maintained at the same level as the original commercially available white water-based paint by adding 25% aqueous ammonia.

This liquid paint is applied to dry plywood with 0.1 m
It was brushed to a thickness of m and the drying time was examined. This is the time it took to touch without touching it,
As a result, the drying time was 45 minutes. (Comparative Example 3) The commercially available white aqueous paint of Example 3 was used as it was, and the drying time was examined in the same manner as in Example 3. As a result, the drying time was 150 minutes.

As a result, the liquid paint according to the present Example 3 to which the specific silicon dioxide powder was added in the predetermined amount was about 1 / drying time as compared with the liquid paint according to Comparative Example 3 to which the silicon dioxide powder was not added. It can be seen that it was shortened to 3 or less. In Example 3, the amount of silicon dioxide powder added was set to about 48 wt% of the entire liquid composition, but the original function of the paint is increased when the amount of silicon dioxide powder added is in the range of 25 to 75 wt%. It was also confirmed that the quick-drying effect appeared without undue damage.

Example 4 1 part by weight of the same silicon dioxide powder as in Example 1 and 10 parts by weight of n-butanol were placed in a closed container, heated at 130 ° C. for 12 hours and cooled to give butanol. The silicon dioxide powder was treated with butanol by evaporation and removal. A commercially available adhesive for concrete (manufactured by Cemedine Co., Ltd., product: Concrete) was prepared. This consists of 72 wt% of vinyl acetate resin and 28 wt% of ethanol.

The above-mentioned butanol-treated silicon dioxide powder 3
A liquid adhesive was prepared by mixing 0 part by weight, 40 parts by weight of the commercially available concrete adhesive, and 1 part by weight of ethanol, and thoroughly agitating and dispersing. The amount of silicon dioxide powder added was about 42 wt% of the total, and the ethanol component in the liquid adhesive was 15 wt% of the total. Further, the viscosity of this liquid adhesive is maintained at the same level as the original commercially available adhesive for concrete.

A tile-concrete block adhesion-strength test was conducted using the above liquid adhesive. This is 25
The above liquid adhesive is uniformly applied to a range of 25 mm from one end of a mm-width tile to a thickness of about 1 mm, and immediately after that, one end of a 25 mm-wide concrete block is applied to the adhesive application surface for a predetermined time at a pressure of 0.5 kg / cm ² . After pressing with, the other end sides of the tile and the concrete block were pulled in the longitudinal direction with respect to each other to examine the peel strength until peeling. Table 2 shows the results of an examination of the relationship between the adhesive time and the peel strength, with the time of pressing as the adhesive time (drying time). In Table 2, when the peel strength reaches a certain level (10 kg), it is indicated by ◯, and when not, it is indicated by X.

Comparative Example 4 The same adhesive-strength test as in Example 4 was carried out using the commercially available adhesive for concrete of Example 4 as it was. The results are also shown in Table 2.

[0038]

[Table 2] As is clear from Table 2, the adhesive according to the present Example 4 in which a specific amount of the specific silicon dioxide powder was added was compared with the adhesive according to Comparative Example 4 in which the silicon dioxide powder was not added (bonding time ( It can be seen that the drying time) was reduced to about 1/2.

In Example 4, the amount of silicon dioxide powder added was approximately 42 wt% of the total liquid composition, but the amount of silicon dioxide powder added was 25-60 wt% of the total amount of the adhesive. It was also confirmed that the quick-drying effect appeared without significantly impairing the function of. The butanol treatment is performed to replace the surface groups (—OH groups) of the silicon dioxide powder with those which are easily dispersed in the non-polar liquid, and silane coupling treatment can be used in addition to the butanol treatment. Then, for example, the silicon dioxide powder that could not be dispersed in benzyl alcohol at a concentration of 20 wt% was treated with the above butanol to give 80 wt% as in the case of water.
It became possible to disperse even at a high concentration of%.

Example 5 Commercially available cement (made by Onoda Cement Co., Ltd.) was prepared. It is based on Portland cement. 15 parts by weight of the same silicon dioxide powder as in Example 1, 18 parts by weight of the above-mentioned commercially available cement, 10 parts by weight of river sand (average particle size: 0.5 mm), and 10 parts by weight of water were blended and kneaded sufficiently. I made a mortar. The total amount of silicon dioxide powder added was about 28 wt.
%.

This mortar was applied on a dry wall surface made of lath to a thickness of 5 mm, and the drying time was examined. As a result, the required drying time was 5 hours. (Comparative Example 5) 18 parts by weight of the commercially available cement of Example 5 above, 10 parts by weight of river sand, and 15 parts by weight of water were mixed and sufficiently kneaded to prepare a mortar, which was then applied to the wall surface in the same manner as in Example 5 above. After coating, the drying time was examined. As a result, the required drying time was 8 hours.

As a result, the mortar according to the present Example 5 to which a specific amount of the specific silicon dioxide powder was added has a drying time of about 5/8 as compared with the mortar according to Comparative Example 5 to which the silicon dioxide powder is not added. You can see that it has been shortened. There was no difference in workability when applying to the wall surface. In addition, in the above-mentioned Example 5, the addition amount of the silicon dioxide powder was set to about 28 wt% of the entire liquid composition, but the original function of the mortar is increased when the addition amount of the silicon dioxide powder is in the range of 25 to 70 wt%. It was also confirmed that the quick-drying effect appeared without undue damage.

(Example 6) Sodium lauryl ether sulfate, a commercially available foaming agent (manufactured by NOF CORPORATION,
Product name: Parsoft EF) was prepared. 24 parts by weight of the same silicon dioxide powder as in Example 1, 20 parts by weight of the same commercial woodworking adhesive as in Example 1, 7 parts by weight of pure water, 25
% Ammonia water 1 part by weight and 5 parts by weight of the above foaming agent were mixed and sufficiently stirred to disperse the liquid adhesive to prepare 36 g of a liquid adhesive. The total amount of silicon dioxide powder added was approximately 42
wt%, and the water content in the liquid adhesive is about 35 wt% of the total.
%. Further, the viscosity of this liquid adhesive is maintained at the same level as the original commercially available adhesive for woodworking.

70 ml of internal volume having a check valve at the top that enables the ejection of the contents by pushing the above liquid adhesive
It was put in a spray can and sealed. Furthermore, 9 g of LPG gas was injected from the check valve and stirred well. Then, a pipe having an inner diameter of 4 mm was attached to the check valve. An adhesive-strength test was performed on a commercially available cardboard for work (a gray rough surface on one side and a white smooth surface on the other side) using the above liquid adhesive. This is a mousse-like foam that is sprayed from the tip of the pipe while holding the spray can by hand and pressing the check valve with fingers to open and close it. Uniformly apply a thickness of 2 to 3 mm within a range of 25 mm from one end, and immediately thereafter, apply one end of the other 25 mm wide strip-shaped cardboard on the smooth surface side to the adhesive application surface for a predetermined time at a pressure of 0.5 kg / cm ² . After pressing, the other end side of each cardboard was pulled in the longitudinal direction and the peel strength until peeling was examined. Table 3 shows the results of an examination of the relationship between the adhesive time and the peel strength, with the pressing time taken as the adhesive time (drying time). In Table 3, as a result of performing the test three times, the peel strength is 3
When the level reaches a certain level (6 kg) for both times, it is marked with a circle and 3
The case where this level was not reached at all times is shown by x, and the other cases are shown by Δ.

Comparative Example 6 The same adhesive-strength test as in Example 6 was carried out using the commercially available woodworking adhesive of Example 6 as it was. The results are also shown in Table 3. (Comparative Example 6 ') Instead of the silicon dioxide powder of Example 6 (Admafine SO-C2), general pulverized silica (Tatsumori Co., trade name: RD-8, average particle size 15 μm) was used. A liquid adhesive having the same composition as that of Example 6 was prepared, and was enclosed in a spray can in the same manner as in Example 6. Then, the same adhesion-strength test as in Example 6 was performed. The results are shown in Table 3.
Are also shown. When the mousse-like foam was applied to the adhesive surface of the test piece from the tip of the pipe, the cells were continuously broken, and the "bulk" of the foam was formed in the same manner as in Example 6 by 2 to 3 m.
It was impossible to keep m.

[0046]

[Table 3] As is clear from Table 3, the adhesive according to the present Example 6 in which the specific silicon dioxide powder was added in a predetermined amount was compared with the adhesive according to Comparative Example 6 in which the silicon dioxide powder and the foaming agent were not added. It can be seen that the adhesion time (drying time) was shortened to about 1/10. Further, the adhesive time according to Example 6 was shortened to about ⅕ compared with that of Comparative Example 6 ′ in which pulverized silica having an average particle size of 15 μm was added. I understand.

(Example 7) An aluminum oxide powder (manufactured by Admatex, trade name: Admafine AO-502) having an average particle size of 0.7 µm and a particle size distribution within one digit width was prepared. This aluminum oxide powder has a volume probability distribution in which the ratio of silicon dioxide powder having a particle size of 1/3 or more and 3 times or less of the average particle size is 85 v of the entire silicon dioxide powder.
%, and the standard deviation of the particle size is 0.
It has a particle size distribution of 8. Further, this aluminum oxide powder has a purity of 99.8% or more, and (maximum diameter)
The ratio of / (minimum diameter) is 1.2 or less.

24 parts by weight of the above-mentioned aluminum oxide powder, 10 parts by weight of the same commercial woodworking adhesive as used in Example 1 and 1 part by weight of 25% ammonia water were mixed and sufficiently stirred to disperse the liquid adhesive. The agent was created. The amount of aluminum oxide powder added was about 69 wt% of the total amount, and the amount of water in the liquid adhesive was 17 wt% of the entire amount. Moreover, the viscosity of this liquid adhesive is maintained at the same level as the original commercially available adhesive for woodworking by adding 25% ammonia water.

The same adhesive-strength test as in Example 1 was conducted using the above liquid adhesive. The results are shown in Table 4.
In Example 7, the addition amount of the aluminum oxide powder was set to about 69 wt% of the entire liquid composition. However, when the addition amount of the aluminum oxide powder is in the range of 45 to 85 wt%, the original function of the adhesive is maintained. It was confirmed that the quick-drying effect appeared without any trouble.

[0050]

[Table 4] The particles of the silicon dioxide powder (Admafine SO-C2) used in Example 1 were observed by TEM (JEM-20).
00FX, 23000 times, 12 fields of view, and distinguish between true spherical particles and irregular particles (two particles combined into a peanut shape) by an image processing device (Luzex III), and The diameter area was calculated, and the irregular area ratio was calculated from this. As a result, the silicon dioxide powder (Admafine SO-C2) used in Example 1 had an irregular area ratio of 7%, and the spherical silicon dioxide powder occupied 93% of the whole area ratio. It was confirmed.

Similarly, as a result of investigating the aluminum oxide powder (Admafine AO-502) used in Example 7, the amorphous area ratio was 10%, and the spherical aluminum oxide powder was found to have the area ratio. It was confirmed that it occupies 90% of the whole.

[0052]

As described in detail above, the quick-drying liquid composition of the present invention contains silicon dioxide powder or aluminum oxide powder having a specific average particle size and particle size distribution and a spherical shape. Therefore, even if a large amount of this ceramic powder having good fluidity and dispersion characteristics is added to obtain a sufficient quick-drying property, the fluidity and the characteristics of the liquid composition itself are not impaired, and it becomes good.

Further, the adhesive of the present invention maintains the stable cell structure when it is foamed and applied to the adherend due to the action of the specific ceramic powder, so that the workability at the time of applying the adhesive is improved. It becomes good, and it becomes possible to apply the adhesive uniformly and thinly. Further, the adhesive of the present invention can reduce the water content of the entire adhesive while suppressing the decrease in fluidity as much as possible by the action of the specific ceramic powder, and can obtain a sufficient quick-drying property.

Claims (2)

[Claims] 1. A liquid spherical composition which forms a solid by drying or reacting a solvent or a dispersion medium component, and is a spherical spherical oxide having an average particle size of 0.05 to 10 μm and a particle size distribution within one digit width. Silicon powder or average particle size of 0.05-
A quick-drying liquid composition, to which is added a spherical aluminum oxide powder having a particle size distribution of 10 μm and a particle size distribution within one digit width. 2. An adhesive obtained by foaming the quick-drying liquid composition according to claim 1.