JPS6213425A - Room temperature-setting aqueous composition and use thereof - Google Patents

Abstract

PURPOSE:To give room temperature crosslinkability to the obtained composition and to eliminate the need of separately storing the polymer and the crosslinking agent, by dispersing an isocyanate crosslinking agent captured by a polymer and a polymer to be crosslinked by this crosslinking agent in water in the form fine particles. CONSTITUTION:The following components A and B are dispersed in water in the form of fine particles: namely, (A) a hydrophobic solvent in which a polymer (polymer 1) which captures an isocyanate compound is stabilized by dispersing with the aid of at least either of a block polymer and a graft polymer each of which has two sections of different polarities and (B) a polymer (polymer 2) having isocyanate group-reactive functional groups. A surface to be treated is coated with the above room temperature-setting aqueous composition, and said water and said hydrophobic solvent are volatilized to bring the polymer which captures the isocyanate compound into contact with the polymer having isocyanate group-reactive functional groups to form a polymer film.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a room-temperature solution in which an isocyanate crosslinking agent captured by a polymer and a polymer crosslinked with this crosslinking agent are dispersed in water in the form of fine particles. The present invention relates to a curable aqueous composition and a method of using the same.

[Conventional technology]

Conventionally, for aqueous emulsion type compositions used as adhesives and paints, in order to increase film strength, the main chain of the polymer is crosslinked and cured by reacting with a crosslinking agent during the film formation process. ing. There are two types of such aqueous emulsion type compositions: those using crosslinking agents that react at room temperature and those using crosslinking agents that react at high temperatures.

[Problem that the invention seeks to solve]

For an aqueous emulsion type composition using a crosslinking agent that reacts at room temperature, if the polymer and crosslinking agent are mixed in advance, the crosslinking reaction will proceed during storage etc. and the aqueous emulsion type composition will thicken and harden, making it impossible to coat. . Therefore, the polymer and crosslinking agent are kept separated in separate containers until used, and are mixed together each time they are used. However, it is cumbersome to mix the two liquids each time they are used. Moreover, if the compound is not used up within a certain period of time, the remaining compound will thicken and harden over time, which is inconvenient and uneconomical.

1) In addition, in aqueous emulsion type compositions that use latent crosslinking agents that react only at high temperatures, the crosslinking reaction does not occur at room temperature, and the above-mentioned disadvantages do not occur because the polymer and crosslinking agent can be blended in advance. However, since it requires a heating device to cause the crosslinking reaction, it has the disadvantage that the heating device and the like are costly.

The present invention was made in view of the above circumstances, and it is an object of the present invention to provide an aqueous room-temperature curable composition that uses a crosslinking agent that reacts at room temperature and that does not require separate holding of the polymer and the crosslinking agent, and a method for using the same. purpose.

[Means for solving the problem] In order to achieve the above object, the present invention provides the following (A)
The first aspect is a cold-curable aqueous composition in which the component and (B) component are dispersed in water in the form of fine particles, and (A) at least one of a block polymer and a graft polymer having two parts with different polarities. A hydrophobic solvent in which an isocyanate compound-trapping polymer (first polymer) is dispersed and stabilized.

(B) A polymer having a functional group that reacts with an isocyanate group (second polymer).

a hydrophobic solvent in which an isocyanate compound-trapping polymer (first polymer) is dispersed and stabilized by at least one of a block polymer and a graft polymer having two moieties of different polarity; and a second polymer having a functional group that reacts with the isocyanate group. A cold-curing aqueous composition is prepared in which a polymer and a hydrophobic solvent are dispersed in water in the form of fine particles, and the cold-curing aqueous composition is applied to a surface to be treated, and the water and hydrophobic solvent are volatilized. A second method for using a room-temperature curable aqueous composition in which a polymer film is formed by bringing the isocyanate compound-trapping polymer into contact with a polymer having a functional group that reacts with the isocyanate group.
This is the gist of the report.

The present inventors have discovered that in an aqueous emulsion type composition using a room-temperature-reactive crosslinking agent, the polymer and the crosslinking agent are blocked and brought into contact with each other after the composition is applied. We thought that cross-linking reactions would not occur during storage, even if they were mixed together, and in order to achieve this, we conducted a series of studies using various materials. As a result, an isocyanate compound was used as a crosslinking agent to capture it in the first polymer (this is referred to as O''), and this capture body was made hydrophobic using a block polymer (graft polymer) that has a dispersion stabilizing effect. By dispersing the isocyanate compound crosslinking agent in a solvent (denoted as O'), and further dispersing this hydrophobic dispersion in the form of fine particles in water (denoted as W), the isocyanate compound crosslinking agent is isolated from water, resulting in O'. A 10/W type emulsion is prepared, and a polymer (second polymer) emulsion having a group that reacts with the isocyanate group of the isocyanate compound crosslinking agent is prepared using the 0'/O/W type emulsion.
When mixed with a W type emulsion to form an aqueous emulsion type composition, the isocyanate compound crosslinking agent is trapped in this composition, so no crosslinking reaction occurs during storage, etc., and after application of the emulsion type composition. The inventors have discovered that the isocyanate compound crosslinking agent bleeds out only when water or the like evaporates, and the second polymer is crosslinked to form a tough coating film, and the present invention has been achieved.

Next, the present invention will be explained in detail.

A schematic diagram of the room temperature curable aqueous composition of the present invention is shown in FIG. The room temperature curable aqueous composition of the present invention comprises: 1. water, 2. isocyanate compound as a crosslinking agent. A first polymer that captures this3. Polymer 4 that stabilizes the dispersion of the first polymer 3
．． A hydrophobic solvent 51 consists of a second polymer 6 having a functional group that reacts with an isocyanate group in its molecular structure, and the second polymer 6 and the hydrophobic solvent 5 are emulsified and dispersed by a surfactant 7°8. . Note that auxiliary agents such as polymer modifiers may be added to the above composition as necessary.

As is clear from FIG. 1, the isocyanate compound 2 is captured by the first polymer 3, and the captured polymer 3 has a polymer 4 having a dispersion stabilizing effect oriented around its outer periphery, and in this state, the hydrophobic solvent 5 Further, the hydrophobic solvent 5 is further dispersed in the form of fine particles in the water by the emulsifying and dispersing power of the surfactant 7. That is, the above series of compounds is a multilayer emulsion (hereinafter referred to as [0°1
It has a structure of 0/W emulsion (not called 0/W emulsion). Therefore, the isocyanate compound 2, which is a crosslinking agent, is trapped in the first polymer 3 and is protected from water by the liquid film of the hydrophobic solvent 5, so it does not come into direct contact with water 1 and is stable. It is in a state of

On the other hand, the second polymer 6, which has a functional group that reacts with an isocyanate group in its molecular structure, is dispersed in water in the form of particles by the protective colloid and the surfactant 8, and is also in a stable state.

The isocyanate compound 2 is preferably a compound with low solubility in the hydrophobic solvent 5, such as hexamethylene diisocyanate (hereinafter abbreviated as [HMDIj),
HMDI-Water-Biuret (manufactured by Asahi Kasei Corporation, Duranate 24A100), HMD I adduct of butanediol (manufactured by Asahi Kasei Corporation).

Duranate EXP, D-101), etc.

Such isocyanate compound 2 has high polarity,
In the polar part of the first polymer 3 that is almost insoluble in a hydrophobic solvent and captures the isocyanate compound 2,
It is captured by weak coupling due to van der Waals forces, etc.

The first polymer 3 that captures the isocyanate compound 2 has an ethylenically unsaturated bond such as styrene, styrene derivative, butadiene, acrylonitrile, chloroprene, acrylic ester, methacrylic ester, vinyl acetate, ethylene, vinyl chloride, vinylidene chloride, etc. It consists of a single or copolymer of a monomer having the following.

As the hydrophobic solvent 5 in which the first polymer 3 capturing the isocyanate compound 2 is dispersed, a solvent in which the isocyanate compound 2 has a low solubility is selected. That is, in this hydrophobic solvent 5, the isocyanate compound 2
is captured by the first polymer 3, and this capture is only realized when the isocyanate compound 2 is dispersed in the hydrophobic solvent 5 without being dissolved. Also,
By using this type of solvent with low solubility, the dissolution and diffusion of isocyanate compound 2 is suppressed, and in the resulting composition, the reaction between isocyanate compound 2 and water 1 is suppressed, and isocyanate compound 2 is
This prevents the occurrence of a phenomenon in which the second polymer 6 reacts with the isocyanate reactive group of the second polymer 6 during storage or the like, resulting in crosslinking and precipitation of the second polymer 6. Examples of this type of solvent include aliphatic hydrocarbons such as heptane, hexane, and cyclohexane. These solvents are appropriately selected in consideration of boiling point, polymerization stability of isocyanate compound 1, etc., but 2
A mixture of two or more species may be used.

As the polymer 4 that is oriented around the outer periphery of the first polymer 3 that captures the isocyanate compound 2 to stabilize the dispersion in the -F hydrophobic solvent 5, one of a block polymer and a graft polymer is used. here,
Examples of block polymers include SBS block polymers with a molecular structure of polystyrene-bolybutadiene-boristyrene, SIS block polymers with a molecular structure of polystyrene-bolyisobrene-boristyrene,
Another example is a hydrogenated SBS block polymer obtained by hydrogenating the butadiene portion of the SBS block polymer. In addition, as a graft polymer, for example, after dissolving natural rubber or depolymerized rubber such as those used in general hydrophobic emulsion production in an aliphatic hydrocarbon, a single substance or a mixture of polar monomers is added to benzoyl. Examples include graft polymers obtained by polymerizing using an initiator such as peroxide and grafting onto natural rubber or the like.

Such a polymer 4 has both a polar part and a non-polar part in the molecule, and is oriented around the outer periphery of the first polymer 3 with the polar part on the inside and the non-polar part on the outside. As mentioned above, the non-polar part is on the outside and this part has an affinity with the hydrophobic solvent (non-polar) 5, so it exerts a dispersion stabilizing effect.

°' The second polymer 6 having a functional group that reacts with an isocyanate group and has an ethylenically unsaturated bond It is obtained by copolymerizing the lit form with a monomer that does not have a functional group that reacts with an isocyanate group and has an ethylenically unsaturated bond.

Examples of the monomer having a functional group that reacts with the isocyanate group and having an ethylenically unsaturated bond include monomers having a bitroxyl group, carboxyl group, amino group, epoxy group, etc. in the molecule. Here, monomers having a hydroxyl group include, for example, 'L, allyl alcohol methacrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl methacrylate, 2-hydroxypropyl acrylate monoallyl ether of polyhydric alcohol, N- Methylolated acrylamide, N-
Methylolmethacrylamide, etc., and monomers with carboxyl groups include, for example, acrylic acid, methacrylic acid, itaconic acid, fumaric acid, crotonic acid, maleic acid partial ester, itaconic acid partial ester, fumaric acid partial ester. , an unsaturated polymerizable organic acid such as maleic acid.

Furthermore, the monomer having an amino group is, for example, allylamine, tert-butylaminoethyl methacrylate, etc., and the monomer having an epoxy group is, for example, glycidyl acrylate, glycidyl methacrylate, etc. Also,
Examples of monomers having an ethylenically unsaturated bond and not having a functional group that reacts with isocyanate t4 include styrene, styrene derivatives, butadiene, acrylonitrile, methacrylonitrile, acrylic esters, methacrylic esters, These include vinyl acetate, ethylene, vinyl chloride, vinylidene chloride, etc.

The second polymer 6 obtained by copolymerizing these monomers has a functional group that reacts with an isocyanate group in its molecule, and therefore has the property of being crosslinked and cured when it comes into contact with an isocyanate compound.

Surfactants 7.8 used in the present invention include anionic surfactants, cationic surfactants. Any nonionic surfactant may be used, such as polyoxyethylene lauryl ether, polyoxyethylene nonylphenyl ether,
Examples include polyoxyethylene sorbitan monostearate. Also, starch. Water-soluble polymers such as dextrin, methyl cellulose, carboxymethyl cellulose, polyacrylic acid or a water-soluble salt thereof, polyacrylamide or a water-soluble copolymer thereof, polyvinyl alcohol, or water-soluble polyamide, etc. may be used.

The above surfactants can be used alone or in combination of two or more.

The room temperature curable aqueous composition of the present invention is produced using the above-mentioned raw materials, and the production is carried out, for example, as follows.

First, make an o' 10/W type emulsion. That is, in a hydrophobic solvent in which an isocyanate compound such as HMDI and a coating polymer having a dispersion stabilizing effect such as an SBS block polymer coexist, ethylenically unsaturated bonds prepared for forming an isocyanate compound-trapping polymer are formed. By polymerizing or copolymerizing one or more monomers, a first polymer capturing an isocyanate compound is produced, and a first polymer dispersion in which the isocyanate compound is dispersed is obtained. In order to trap a large amount of the isocyanate compound in the first polymer, the polarity of the polymer is increased by copolymerizing 401 compounds with high polarity such as acrylonitrile, methacrylonitrile, vinyl chloride, etc. It is sufficient to increase the affinity with the incyanate compound. The copolymerization amount of this polar monomer is preferably 0.1 to 50%, more preferably 1 to 30% of the total monomers.

In addition, when producing the above-mentioned isocyanate compound-trapping polymer, it is also possible to copolymerize a monomer having a functional group that reacts with an isocyanate group, such as a hydroxyl group, a carboxyl group, or an amine group. In this case, the capture polymer is crosslinked with some of the isocyanate compounds. By varying the degree of crosslinking, the mobility of the polymer segments can be adjusted and, as a result, the rate of desorption can be controlled. However, if the copolymerization amount of a monomer having a functional group that reacts with an isocyanate group is too large, the isocyanate compound will promote crosslinking of the incyanate compound-trapping polymer.
The movement of the polymer segments becomes excessively suppressed, and as a result, even if the trapped isocyanate compound tries to act as a crosslinking agent for the final purpose of the polymer, it becomes a national law that the isocyanate compound is smoothly released from the trapped polymer. will no longer work. Therefore, the amount of copolymerized monomer that reacts with isocyanate groups is 1 of the total weight.
It is desirable to keep it below 0%.

In addition, monomers with two or more double bonds such as divinylbenzene can be used to control the rate of elimination of isocyanate compounds, but for the same reason as above, it is recommended to use less than 10% of the total monomers. It should be stopped.

The hydrophobic dispersion of the isocyanate compound-trapping polymer thus obtained is dispersed in the form of fine particles in water using a surfactant to prepare an O"10/W type emulsion. Note that the stirring intensity for dispersion is , it is necessary to keep the amount to an extent that does not destroy the dispersion state of the isocyanate compound-trapping polymer in the hydrophobic dispersion.

In the above 0' 10/W type emulsion, an isocyanate compound which is a crosslinking agent is captured, and this isocyanate compound capturing polymer is coated with a block or graft polymer which is a dispersion stabilizer and is dispersed in a hydrophobic solvent in the form of particles. Moreover, since this dispersion is stabilized with a surfactant and dispersed in water in the form of particles,
The isocyane-1 compound is isolated from the outside, and the crosslinking reaction does not proceed even if it is mixed in the same solution with the second polymer that undergoes the crosslinking reaction.

The 0' 10/W type emulsion according to the present invention is stable and does not cause separation phenomena. Although the reason for this is not clear, it is assumed as follows. That is, the above 0'
The 0゛10 interfacial film in the 10/W type emulsion is:
This O' 10 type emulsion is made of at least one of a block polymer and a graft polymer, which are macromolecules, and has mechanical strength, unlike micelles formed from an aggregate of ordinary monomolecular surfactants. Even when it is stirred in water to emulsify it, it maintains the Oo 10 form and maintains that state even after that. In addition, since the isocyanate compound is mostly insoluble in the hydrophobic solvent that forms the emulsion particles and is captured by the first polymer, the isocyanate compound in the hydrophobic solvent that forms the emulsion particles Its concentration is very low and in a fixed state, greatly restricting its diffusion into water, which forms the continuous phase of the emulsion. Moreover, the very ? The isocyanate compound of jtWk is adsorbed at the interface between the hydrophobic solvent forming the emulsion particles and the water forming the continuous phase of the emulsion, and undergoes interfacial polymerization with water and surfactant to strengthen the interfacial film at the above interface. do. It is presumed that these two reasons make the 0°10/W type emulsion stable.

Next, an emulsion obtained by emulsifying and dispersing the second polymer is mixed into the 0'10/'N type emulsion. That is, in water in the presence of a surfactant that acts as an emulsifier or a protective colloid, a monomer that has a functional group that reacts with an isocyanate group and has an ethylenically unsaturated bond and a functional group that reacts with an incyanate group. By copolymerizing a monomer that does not have an isocyanate group and has an ethylenically unsaturated bond, a secondary monomer that has a functional group that reacts with an isocyanate group is produced.
A second polymer dispersion in which this polymer is dispersed is obtained. In this case, the amount of copolymerized monomers having functional groups is desirably about 0.1 to 30% of the total monomers. Then, the second polymer dispersion was added to the 0'
10/W type emulsion. During this mixing, it is desirable that the molar ratio of the isocyanate groups in the second polymer dispersion to the functional groups that react with the isocyanate groups is equal or slightly smaller in the case of the 0'10/W emulsion. As a result, the room temperature curable aqueous composition of the present invention is obtained.

In the room temperature curable aqueous composition No. 1 thus obtained, although the crosslinking agent and the crosslinked polymer are mixed in the same aqueous solvent, the crosslinking agent is captured by the first polymer, and the crosslinking agent is captured by the first polymer. The polymer is stabilized by a polymer as a dispersion stabilizer and dispersed in emulsion particles made of a hydrophobic solvent, and is shielded from the crosslinked polymer that is immersed in an aqueous solvent. , the progress of the crosslinking reaction is inhibited. Further, the reaction with isocyanate groups in water also progresses at 1 ml because the isocyanate groups are blocked from water by the first polymer and the hydrophobic solvent phase. This is the greatest feature of the present invention. Then, when the above composition is applied to the surface to be treated,
The water and the hydrophobic solvent are volatilized, and the liquid phase of the hydrophobic solvent that impedes the diffusion of the isocyanate compound disappears. Then, the particles having the isocyanate compound h1) capture polymer (first polymer) as a core and the crosslinked polymer (second polymer) come into contact with each other through a film formed by the surfactant. do. As a result, this film is destroyed and the isocyanate compound bleeds out, reacts with the functional group that reacts with the isocyanate group in the second polymer, and crosslinks.
Forms a hardened film. The above crosslinking reaction progresses over time.

Note that although the isocyanate compound scavenging polymer does not essentially contribute to crosslinking, in reality, the molecular chains of the produced polymer and its own molecular chains become entangled to form a network-like structure. Even if a coated film that has been left for about a month is immersed in an organic solvent, almost no elution occurs.

As described above, in the room temperature curable aqueous composition of the present invention, even when the crosslinking agent and the crosslinked polymer are mixed in the same solvent, the crosslinking reaction does not occur, and therefore, the composition is maintained without thickening or curing. It is a one-component product that undergoes a crosslinking reaction, forms a film, and hardens only when it is applied during use, making it extremely easy to use.

〔Effect of the invention〕

As described above, the room temperature curable aqueous composition of the present invention maintains its initial state because the crosslinking reaction between the crosslinking agent and the crosslinked polymer does not proceed unless the water and the hydrophobic solvent volatilize, that is, in the emulsion state. In order to maintain the temperature, there is no need to separate the crosslinking agent and the crosslinked polymer in separate containers as in conventional room temperature curable aqueous compositions. In addition, since it is not a two-component type, there is no need to mix the two together each time it is used, and it is sufficient to apply only the required amount to the surface to be treated.
Extremely easy to use. That is, the composition of the present invention:
When a film is formed and water and a hydrophobic solvent are volatilized, it becomes insoluble in the solvent after one day, and the crosslinking density increases over time. Moreover, since no high-temperature-reactive crosslinking agent is used, no heating is required during curing, resulting in good workability.

The room temperature curable aqueous composition of the present invention can be used in a wide range of applications such as adhesives and paints.

Next, examples will be described.

[Example 1] SBS block polymer (Califlex 1l101 manufactured by Shell Chemical Co., Ltd.) was placed in a 300 ml four-loaf flask equipped with a thermometer, stirrer, condenser and dropping funnel.
7 and 140 cc of cyclohexane were added and dissolved. Next, the inside of the flask was replaced with nitrogen gas, the system was kept at 70°C, and styrene 40
cc, acrylonitrile 20cc, HMDI-water burette (manufactured by Asahi Kasei Corporation, Dulane) 24A100
) 20g, azobisisobutyronitrile (polymerization initiator)
A solution in which 0.6 g was uniformly dissolved was added to the
The first polymer dispersion in which the incyanate compound (MDI-water biuret is M71M in the styrene-acrylonitrile copolymer) is dispersed in cyclohexane. I got it.

Tsukini, 185 g of water, 5 g of alternating copolymer of methyl vinyl maleic anhydride (manufactured by Gough Co., Ltd., Gauntlet AN-169) as a protective colloid, 5 g of an emulsifier (manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Neugen ES-120), the same emulsifier. (Manufactured by Daiichi Kogyo Seiyaku Co., Ltd.

Neugen ES-140) 5g was dissolved, and 150cc of the first polymer dispersion was added to the solution while stirring at 80 rpm.
The mixture was added dropwise over 0 minutes to obtain an O' 10/W type emulsion. Micrographs of this emulsion are shown in Figures 2 and 3.
As shown in the figure. Figure 2 is a photograph taken at approximately 25°0 magnification, and it can be seen that the 0°10 component is dispersed in the water. FIG. 3 is a photograph taken at approximately 3500 times magnification, and the 0°10 component is further enlarged to show the state in which isocyane-1/compound-trapping polymer 2.3 is dispersed in the hydrophobic solvent. The above emulsion remained stable without gelation even after being left at room temperature for three months or more.

On the other hand, in a fourth RL 300 RN 12 flask equipped with a thermometer, a stirrer, a condenser, and a dropping o-1. , Pronon 20
8) 2.5 g and 2.5 g of Emulgen 920 (manufactured by Kao Soap Co., Ltd.) were added and dissolved. Next, after replacing the inside of the flask with nitrogen gas and keeping the system at 70°C,
A solution prepared by dissolving 0.3 g of potassium persulfate, which is a polymerization initiator, in 10 g of water is added, and then 35 g of butyl-7-acrylate h, 50 g of methyl methacrylate, and 10 g of acrylonitrile, which are monomers for producing the second polymer, are added. ,
A solution in which 5 g of 2-hydroxyl methacrylate was uniformly dissolved was added dropwise over a period of 3 hours using a dropping roller 1. After that, the temperature was maintained at 70°C for 2 hours and then cooled. A second polymer dispersion was obtained.

Thus obtained, the first polymer is dispersed in 0
A room temperature curable aqueous composition was obtained by mixing 9 g of the °10/W type engineered multilayer and 10 g of the second polymer dispersion.

[Example 2] An O' 10/W type emulsion and a second polymer dispersion were obtained in the same manner as in Example 1, but the 4>14 body used to prepare the second polymer dispersion was It was changed to 30 g of butyl acrylate, 60 g of methyl methacrylate, and log of 2-hydroxyl methacrylate. Then, 18 g of the above 0' 10/W type emulsion and 10 g of the second polymer dispersion were mixed to obtain a room temperature curable aqueous composition.

〔test〕

One day after mixing, the above two types of room temperature curable aqueous compositions were poured onto a polyethylene plate to a film thickness of 0.5 am, and a film was formed in a constant temperature bath at 30'C. After 30 days, about 0.1 g of the coating film was taken and immersed in 40 g of dioxane, and the swelling rate and elution rate of the coating film-forming components after 24 hours were measured. Similar measurements were also performed on the film formed 20 days after mixing. The results are shown in Table 1. In addition, observations were made to see if bubbles were formed in the coating film due to the generation of carbon dioxide gas due to the reaction between water and the isocyanate compound. The results are also shown in Table 1.

(Hereinafter in the margin) Table 1 (Hereinafter in the margin) 啼１ From the results in Table 1, the swelling rate and dissolution rate of the film decreased over time for all room temperature curable aqueous compositions, indicating that crosslinking is progressing. I understand that. Moreover, when comparing the swelling rate and elution rate of the membrane formed after mixing 1) 1 and the membrane formed 20 days after mixing, there is almost no difference. Same-
It can be seen that even when mixed in an aqueous system and stored for 20 days, almost no crosslinking reaction occurred during that time. Furthermore, since there are no traces of air bubbles in the film, it can be seen that in this room-temperature curing aqueous composition, water and isocyanate compounds do not react even though they coexist. . Therefore, it can be said that the isocyanate compound undergoes a crosslinking reaction with the second polymer without any waste.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the room temperature curable aqueous composition of the present invention, Figure 2 is a micrograph of a 10゛10/W type emulsion at a magnification of approximately 250 times, and Figure 3 is a 0''10/W type emulsion. This is an approximately 3500x microscopic photograph of.■...Water 2...Isocyanate compound 3...
First polymer 4... Dispersion stabilizing polymer 5...
・Hydrophobic solvent 6...Second polymer 7.8-Surfactant Patent applicant Kanebo NSC Co., Ltd. Agent
Patent Attorney Yukihiko Nishifuji Figure 1 0nqseimo-1 2,35] 12, 3 1.4 0702 Father Senjo Etoni Seisho (Bu 0 1 to 1 0060) Month 12

Claims (2)

[Claims] (1) A room temperature curable aqueous composition characterized in that the following components (A) and (B) are dispersed in water in the form of fine particles. (A) A hydrophobic solvent in which an isocyanate compound-trapping polymer (first polymer) is dispersed and stabilized by at least one of a block polymer and a graft polymer having two portions with different polarities. (B) A polymer having a functional group that reacts with an isocyanate group (second polymer). (2) A hydrophobic solvent in which an isocyanate compound-trapping polymer (first polymer) is dispersed and stabilized by at least one of a block polymer and a graft polymer having two moieties with different polarities, and a functional group that reacts with an isocyanate group. A room temperature curable aqueous composition is prepared in which a polymer (second polymer) and a second polymer are dispersed in water in the form of fine particles, and the room temperature curable aqueous composition is applied to a surface to be treated, and the water and hydrophobic A method for using an aqueous room-temperature curable composition, which comprises forming a polymer film by bringing the isocyanate compound-trapping polymer into contact with a polymer having a functional group that reacts with the isocyanate group by volatilizing the organic solvent.