KR102361460B1 - Primer composition for coating on wet surface and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an aqueous primer composition which can be coated on a wet surface, and more specifically, to a primer composition which can be coated directly on a wet substrate without a separate drying process and does not cause coating film defects such as floating and water pockets as the coated primer film has high adhesion to the substrate.

Description

An aqueous primer composition that can be coated on a wet surface and a manufacturing method thereof

The present invention relates to an aqueous primer composition that can be coated on a wet surface, and more particularly, it can be directly coated on a wet surface without a separate drying process, and the coated primer coating film floats as it has high adhesion with the substrate It relates to a primer composition that does not cause coating film defects such as development and water pockets.

A primer protects the surface of an object from corrosion or physical impact and is first painted on the surface of an object to facilitate subsequent painting. In general, the outermost surface of concrete or mortar to increase corrosion resistance and adhesion. As a paint to be applied, it refers to a material that penetrates into concrete or mortar and the asphalt waterproofing layer is coated to strengthen the adhesion with the concrete or mortar surface.

In general, in the case of a concrete building roof or inter-floor floor or wall, leakage occurs through various factors. That is, due to the nature of concrete, the waterproof layer is damaged by cracks and behavior due to defects in the structure, or the waterproof layer is aged and floats with the floor. , leaks occur through defects in the structure, and in severe cases, there is a risk of damage to the slab and structure.

On the other hand, the method used to form the waterproof layer on the structure is largely divided into coating film waterproofing and sheet waterproofing. The waterproofing of the coating film is a kind of polymer-based waterproofing method, in which a solvent or emulsion of synthetic rubber or synthetic resin is applied to a waterproofing base to form a waterproofing film of a certain thickness, and a waterproofing layer is formed by penetrating into the waterproofing ground. It means to form a multi-layer waterproof structure by repeatedly painting the construction surface with a spray, brush, etc., and such coating film waterproofing takes a long period of time, costs a lot of labor due to the large number of processes, and peels off due to poor adhesion between waterproof layers Accidents occur frequently.

On the other hand, sheet waterproofing uses synthetic resin or synthetic rubber as a raw material and attaches a thin sheet-type waterproofing agent to the waterproofing surface. As a waterproofing method applied in the case of constructing a waterproofing layer, such sheet waterproofing can compensate for the disadvantages of waterproofing the coating film. is being used

The demand for research and development for a new primer composition that can reinforce problems such as durability, cold resistance, and adhesion of a primer for forming a waterproof layer is continuously expanding.

In general, primer coating is carried out in a dry state. Therefore, if the base surface for painting has a wet surface due to leakage or a wet climatic environment, or structural problems of the paint base, it takes a long time to completely dry, thus reducing economic and process efficiency, and furthermore, water treatment In the case of a facility or underground space, it is impossible to completely dry it due to the continuous elution of moisture and groundwater.

In relation to the coating in such a wet state, Patent Registration No. 10-1227380 (published on January 30, 2013) relates to a surface coating method of a concrete structure using a composite coating structure with excellent adhesion to a wet surface, and the concrete surface Including nano-sized porous particles, hydrophilic hollow particles, low-viscosity epoxy resins, polyfunctional epoxy reactive diluents and curing agents that can penetrate into In addition, Korean Patent Publication No. 10-0969944 (published on July 14, 2010) relates to a water-soluble complex curable primer composition, including a primer composition including an acrylic emulsion resin, liquid silicate and water. There is described a technique that discloses excellent penetration, curing, and adhesion to the parent body as it can form a mesh composite hardening.

However, despite these prior documents, there is no need for a separate drying process for the wet surface, and after simply wiping the base to remove moisture, it is possible to apply a primer as a pretreatment operation for waterproofing a paint film or waterproofing an asphalt sheet. The development of an aqueous primer composition coating the wet surface that can penetrate into the wet surface matrix to form a coating film and adhere to the matrix with high adhesion, and rapidly dry the primer coating film, is continuously required.

Korean Patent Publication No. 10-1227380 (Announcement Date: 2013.01.30.) Korean Patent Publication No. 10-0969944 (Announcement Date: 2010.07.14.)

In order to solve the above problems, the present invention can be coated directly on the wet surface without a separate drying process when the concrete or mortar surface is wet or exposed in a wet state due to water leakage or rain, and coating It is an object of the present invention to provide a primer composition that does not cause coating film defects such as floatation and water pockets by allowing the applied primer coating film to have high adhesion to the base surface.

In addition, it is another object of the present invention to provide a novel method for preparing the primer composition.

In order to solve the above problems, the present invention provides an aqueous primer composition that can be coated on a wet surface, the primer composition comprising, based on the total weight of the composition, 10 to 50% by weight of a water-insoluble silicate resin; 20 to 40% by weight of an acrylic resin; 5 to 15% by weight of a urethane resin, a urea resin, or a mixture thereof; And it provides an aqueous primer composition comprising 20 to 55% by weight of water.

In one embodiment, the aqueous primer composition comprises 10 to 30% by weight of a water-insoluble silicate resin, based on the total weight of the composition; 20 to 35% by weight of an acrylic resin; 5 to 10% by weight of a urethane resin, a urea resin, or a mixture thereof; and 25 to 50% by weight of water.

In one embodiment, the water-insoluble silicate resin is a resin comprising at least one selected from a sodium silicate resin, a potassium silicate resin, and a lithium silicate resin, and a water-insoluble resin for converting the metal silicate resin into a water-insoluble resin. By the addition of the conversion component, a water-insoluble silicate resin may be formed. In this case, the water-insoluble conversion component is selected from sodium silicate resin, potassium silicate resin, and lithium silicate resin with respect to 100 parts by weight of any one or more resins. 50 to 150 parts by weight may be added, and in this case, the water-insoluble conversion component is zinc oxide, kaolin, aluminum hydroxide, nano-silica, copper sulfate, boron oxide (B ₂ O ₃ ), magnesium oxide (MgO) and aluminum oxide. (Al ₂ O ₃ ) Any one or more selected from the group consisting of may be used, and preferably, a mixed solution of zinc oxide, kaolin, aluminum hydroxide, and nano-silica may be used as the water-insoluble conversion component.

In one embodiment, the aqueous primer composition is a coagulant, a tackifier, an inorganic filler, a viscosity modifier, a curing accelerator, an antioxidant, a retardant, a flame retardant, a binder, a pigment, a surfactant, an auxiliary agent, an antifoaming agent, a plasticizer, a dispersant, a UV stabilizer , may further include any one or more selected from the group consisting of anti-settling agents, flow control agents and water absorbents as additives.

In addition, the present invention provides a method for producing an aqueous primer composition that can be coated on a wet surface, (a) in 100 parts by weight of a liquid alkali metal silicate resin, converting the metal silicate resin into a water-insoluble resin that does not dissolve in water. adding 50 to 150 parts by weight of the conversion component and stirring to prepare a water-insoluble silicate resin; (b) adding 20 to 40 wt% of an acrylic resin and 5 to 15 wt% of a urea resin, a urethane resin, or a mixture thereof to 10 to 50 wt% of the water-insoluble silicate resin and stirring to prepare a complex mixture component ; And (c) adding 20 to 55% by weight of water to the complex mixture component and stirring, to prepare an aqueous primer composition; provides a method for producing an aqueous primer composition comprising a.

In one embodiment, the alkali metal silicate resin used in the manufacturing method includes at least one selected from sodium silicate resin, potassium silicate resin, and lithium silicate resin, and the water-insoluble converting component is zinc oxide, kaolin, hydroxide At least one selected from the group consisting of aluminum, nanosilica, copper sulfate, boron oxide (B ₂ O ₃ ), magnesium oxide (MgO), and aluminum oxide (Al ₂ O ₃ ) may be used.

As an embodiment, the acrylic resin may be a resin having a pH of 9 or more.

In one embodiment, the manufacturing method is before or after step (b), a coagulant, a tackifier, an inorganic filler, a viscosity modifier, a curing accelerator, an antioxidant, a retarder, a flame retardant, a binder, a pigment, a surfactant, an auxiliary agent , an antifoaming agent, a plasticizer, a dispersing agent, a UV stabilizer, an anti-settling agent, a flow control agent, and a water absorbent may further include adding any one or more additives selected from the group consisting of.

In one embodiment, the prepared aqueous primer composition is an insoluble silicate resin 10 to 30 weight%; 20 to 35% by weight of an acrylic resin; and 5 to 10% by weight of a urea resin, a urethane resin, or a mixture thereof; 25 to 50% by weight of water.

The primer composition according to the present invention can be directly coated on a substrate such as wet concrete or mortar without a separate drying process, thereby shortening the working time, thereby further improving process efficiency and economic feasibility in the work.

In particular, the existing primers provided a factor of delay in air and an increase in construction cost by wiping the base surface and drying it completely before applying the primer when the base surface was wet or exposed in a wet state, especially in the underground section. Construction makes it difficult to waterproof a coating film or waterproof an asphalt sheet due to the elution of moisture and groundwater, but the primer composition according to the present invention has the advantage of solving these problems.

In addition, as the primer composition of the present invention adheres to a substrate such as wet concrete and molal with high adhesive force, the primer coating film formed on the substrate according to the present invention is stably attached to the substrate, such as water pockets, lifting phenomena, etc. There is an additional advantage of not causing a coating film defect of

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In general, the nomenclature used herein is those well known and commonly used in the art.

When a part "includes" a component throughout this specification, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

The present invention contains water as a water-insoluble silicate resin and a solvent, and improves permeability, water resistance and adhesion while reducing pollution to the working environment and daily environment, so that even when the substrate is wet, it is necessary to completely dry the wet substrate It relates to a primer composition capable of performing a painting operation immediately after simply wiping a wet surface without it, and a method for manufacturing the same.

The aqueous primer composition coatable on a wet surface according to the present invention comprises 10 to 50% by weight of a water-insoluble silicate resin, based on the total weight of the composition; 20 to 40% by weight of an acrylic resin; 5 to 15% by weight of a urethane resin, a urea resin, or a mixture thereof; and 20 to 55% by weight of water.

In the present invention, the water-insoluble silicate resin is a component that improves the permeability, water resistance, density and chemical resistance of the primer composition, and may be included in an amount of 10 to 50% by weight based on the total weight of the primer composition.

When the water-insoluble silicate resin is included in an amount of less than 10% by weight, it is not possible to have sufficient permeability and water resistance to the wet surface, as well as the density and chemical resistance of the primer coating film coated on the wet surface is reduced, and 50% by weight When it exceeds, the content of other resin components is relatively lowered, so that the adhesion or drying speed of the primer coating film can be reduced, so that physical properties and process efficiency can be reduced, preferably 10 to 30 wt%, more preferably 12 to 25% by weight may be included.

The water-insoluble silicate resin is a resin comprising at least one selected from sodium silicate resin, potassium silicate resin, and lithium silicate resin, and a water-insoluble converting component that changes the metal silicate resin into a water-insoluble resin that does not dissolve in water is added. is formed

The sodium silicate resin, potassium silicate resin, and lithium silicate resin are inorganic paint components that enhance water resistance while strengthening bonding strength with the adherend. However, they have solubility as they contain alkali metal in a certain ratio compared to the silica component. However, these soluble alkali silicates or alkali silicate mixtures can be insolubilized in water through agitation with water-insoluble conversion components including metallic elements.

The water-insoluble conversion component including the metal element is a material added to improve the density, chemical resistance and water resistance of the primer composition including the silicate resin by insolubilizing the alkali silicate resin in water, specifically including the metal element The water-insoluble conversion component is added and stirred to any one or more selected from the group consisting of sodium silicate resin, potassium silicate resin and lithium silicate resin, preferably a single resin or two mixed silicate resins to form an alkali metal of the alkali silicate resin Ions, that is, Na ⁺ , K ⁺ , Li ⁺ are replaced with metal ions of the water-insoluble conversion component, or the Na ⁺ , K ⁺ , Li ⁺ ions and the metal ions of the water-insoluble conversion component are mixed together to coexist. By insolubilizing the alkali silicate resin in water and improving the permeability, water resistance, density and chemical resistance of the primer composition including the same, it is possible to form a stable primer coating film even on a wet substrate.

In this case, the water-insoluble conversion component is preferably zinc oxide, kaolin, aluminum hydroxide, nanosilica, copper sulfate, boron oxide (B ₂ O ₃ ), magnesium oxide (MgO) and aluminum oxide (Al ₂ O ₃ ) The group consisting of Any one or more components selected from among may be used, and their content is included in an amount of 50 to 150 parts by weight based on 100 parts by weight of any one or more silicate resins selected from sodium silicate resin, potassium silicate resin, and lithium silicate resin. .

This is because when the water-insoluble conversion component including the metal element is included in an amount of less than 50 parts by weight based on 100 parts by weight of the alkali silicate resin, the substitution reaction of the alkali silicate resin with the alkali ions is not easily made, so that the silicate resin is water-insoluble. If it exceeds 150 parts by weight, it is uneconomical due to an increase in the content of the residual water-insoluble conversion component that does not participate in the reaction, and there is also a possibility that the unreacted residue may act as an impurity.

Preferably, the water-insoluble conversion component is a mixed solution of zinc oxide, kaolin, aluminum hydroxide and nano-silica, and the mixture is 50 parts by weight of any one or more resins selected from the sodium silicate resin, potassium silicate resin and lithium silicate resin to 150 parts by weight, Preferably zinc oxide 25-50 parts by weight, kaolin 10-40 parts by weight, aluminum hydroxide 10-40 parts by weight, nano-silica 5-20 parts by weight, more preferably zinc oxide 40-50 parts by weight, kaolin 20-30 It may be included in an amount of 20 to 30 parts by weight of aluminum hydroxide, and 10 to 20 parts by weight of nano-silica.

In the insoluble conversion component, when zinc oxide, kaolin, aluminum hydroxide and nano-silica are mixed and added, it increases the penetration effect on the concrete or mortar surface and makes the water-resistance performance of the resin dense.

In the present invention, the acrylic resin improves drying speed and adhesion when the primer is applied to the base surface, thereby shortening the working time and improving process efficiency, as well as allowing the primer to be adhered to and painted on a wet base surface. As a component, it may be prepared by polymerizing or copolymerizing one or more monomers selected from an acrylic monomer containing a carboxyl group, a non-functional acrylic monomer and an acrylic monomer containing a hydroxyl group and an ethylenically unsaturated monomer.

Specifically, the acrylic resin is 2-phenoxyethyl acrylate, ethoxylate phenoxy acrylate, 3,3,5-trimethylcyclonucleic acid acrylate, isobornyl acrylate, cyclic triethyl propane formal acrylate, It is formed by polymerization of at least one material selected from the group consisting of benzyl acrylate, cyclohexyl acrylate and methacrylic acid ester, and has a pH of 9 or higher.

When the acrylic resin is prepared to have a pH of less than 9, the acrylic resin causes a pH collision with the water-insoluble silicate resin to which it is mixed, resulting in gelation, so it is not properly mixed and stirred with other resin components, It may indicate a phenomenon in which the gelled solid is precipitated and solidified.

The acrylic resin may be included in an amount of 20 to 40 wt%, preferably in a range of 20 to 35 wt%, based on the total weight of the primer resin composition of the present invention.

When the acrylic resin is contained in an amount of less than 20% by weight, the primer coating film cannot exhibit sufficient adhesive strength, so adhesion failure between the wet substrate and the primer coating film may occur. There is a fear that the content is reduced and other physical properties are reduced.

In the present invention, a urethane resin, a urea resin, or a mixture thereof used in the aqueous primer composition may be included to improve adhesion and curability.

The urea resin is a thermosetting resin and has the properties of an elastic body, that is, an elastomer, so it is very elastic and has a fast curing rate, so it can shorten the drying time and reduce the breakage rate. It can form a seamless hard film, As it has a low affinity for water and has hydrophobicity, it enables painting even on a wet or low-temperature surface for painting.

Such urea resin may be used alone or included with the urea resin in the following to be used as a mixed component in the primer composition, and the content used is alone or as a mixed component, and is 5 to 15% by weight based on the total weight of the primer composition. Included.

When the amount of urea resin is less than 5% by weight, the drying time is increased and the adhesion to the wet surface is reduced, so that the working efficiency is reduced, and when it exceeds 15% by weight, it is difficult to control the drying time due to the excessive urea resin There is a concern that work efficiency is rather reduced, and preferably, the urea resin may be included in an amount of 5 to 10% by weight.

In the present invention, the urethane resin is formed by a condensation reaction of a polyol or diol having a hydroxyl or amino group and an isocyanate, and may be used alone in the primer composition or may be used as a mixed component by being included with the urea resin in the primer composition The functionality and content range of is the same as the description of the urea resin.

In the present invention, water may be used as a solvent component in the primer composition. The content of water may be included in an amount of 20 to 55% by weight, preferably 25 to 50% by weight, based on the total weight of the primer composition. This is to match the proper viscosity of the primer, and to realize a uniform coating surface when working with the primer.

Here, when the water content is less than 20% by weight, the fluidity and permeability of the primer composition is lowered, so that it is difficult to paint on a wet substrate, and when it exceeds 55% by weight, the density of the primer composition is reduced and water resistance , density, adhesion, etc. may decrease, and there may be difficulties in uniform coating.

The primer composition of the present invention may optionally further include an additive, if necessary.

The additives include coagulants, tackifiers, inorganic fillers, viscosity modifiers, curing accelerators, antioxidants, retarders, flame retardants, binders, pigments, surfactants, adjuvants, defoamers, plasticizers, dispersants, UV stabilizers, anti-settling agents, flow control agents and It may be at least one selected from the group consisting of moisture absorbents, and may be included in 0 to 25% by weight in the total weight of the primer composition, preferably 1 to 20% by weight, more preferably 3 to 15% by weight % may be included.

the additive One When included in less than weight %, the functionality of the additive cannot be expressed, and when it exceeds 25 weight %, relatively water-insoluble silicate resin, acrylic resin, and urethane/urea resin, which are the main components of the primer composition. As the content is reduced, the physical properties of the primer composition may be rather deteriorated.

On the other hand, the present invention may provide a method for preparing an aqueous primer composition that can be coated on a wet surface, the method comprising: (a) adding the metal silicate resin to 100 parts by weight of a liquid alkali metal silicate resin in water 50 to water-insoluble converting component that converts to water-insoluble resin adding 150 parts by weight and stirring to prepare a water-insoluble silicate resin; (b) said water insoluble silicate resin preparing a complex mixture component by adding 20 to 40 wt% of an acrylic resin and 5 to 15 wt% of a urea resin, a urethane resin, or a mixture thereof to 10 to 50 wt% and stirring; and (c) adding 20 to 55% by weight of water to the complex mixture component and stirring to prepare an aqueous primer composition.

First, step (a) is a step of preparing a water-insoluble silicate resin by adding a water-insoluble converting component to a liquid alkali silicate resin and stirring. Here, the water-insoluble conversion component may have the same range of components and content as described above.

Specifically, in step (a), 50 to 150 parts by weight of a water-insoluble converting component containing a metal element is added to 100 parts by weight of a liquid alkali silicate resin dissolved in water including an alkali metal in a certain ratio relative to the silica component And by stirring, alkali ions of the alkali silicate resin, that is, Na ⁺ , K ⁺ , Li ⁺ are replaced with metal ions of the water-insoluble conversion component, or the Na ⁺ , K ⁺ , Li ⁺ ion component and the water-insoluble conversion component A step of mixing so that the metal ions of the alkali silicate resin are mixed together to insolubilize the alkali silicate resin, wherein the stirring speed and time can be adjusted according to the content of the reacting resin and water-insoluble converting component, but is not limited, but preferably may be made at 2000 to 3000 rpm for 0.5 to 2 hours, and the reaction temperature may be in the range of 20 to 60 degrees, preferably 20 to 40 degrees.

In step (a), the liquid alkali silicate resin is at least one selected from sodium silicate resin, potassium silicate resin and lithium silicate resin, preferably a single resin or two mixed silicate resins. 100 weight of a silicate resin With respect to parts, 5 to 100 parts by weight, preferably 30 to 80 parts by weight of water are added and dissolved in a dissolved state, and the amount of water added may be adjusted in consideration of the physical properties and content of the resin.

In step (a), the water-insoluble conversion component is zinc oxide, kaolin, aluminum hydroxide, nanosilica, copper sulfate, boron oxide (B ₂ O ₃ ), magnesium oxide (MgO) and aluminum oxide (Al ₂ O ₃ ) Any one or more selected from the group consisting of 50 to 150 parts by weight based on 100 parts by weight of the liquid alkali silicate resin.

Here, the content range of the water-insoluble conversion component for the alkali silicate resin may be the range as described above, and a more preferable component of the water-insoluble conversion component is zinc oxide, kaolin, aluminum hydroxide and a mixed solution of nano-silica. can be used

In addition, in the present invention, step (b) adds 20 to 40 wt% of an acrylic resin and 5 to 15 wt% of a urea resin, a urethane resin or a mixture thereof to 10 to 50 wt% of the water-insoluble silicate resin, As a step of preparing a complex mixed component by stirring, the water-insoluble silicate resin is prepared by water insolubilization of the alkali silicate resin by the water-insoluble converting component in step (a), so that the water resistance of the silicate resin is further strengthened as well as , permeability, density and chemical resistance are improved, and is added in an amount of 10 to 50 wt%, preferably 10 to 30 wt%, based on the total weight of the composition.

In addition, the functions, components, and ranges of the acrylic resin in step (b) are the same as those described above, and the description of the urea resin, the urethane resin, and water may be applied in the same manner as described above.

Hereinafter, examples will be given for a more detailed description of the present invention. However, the following examples are only preferred examples of the present invention, and the present invention is not limited thereto.

<Example>

Primer composition preparation

<Examples 1 to 5>

(1) Preparation of water-insoluble silicate resin

Add 38% by weight of a mixture of potassium silicate resin and sodium silicate resin to 20% by weight of purified distilled water and stir while adding 20% by weight of zinc oxide, 9% by weight of kaolin, 9% by weight of aluminum hydroxide and 4% by weight of nanosilica, By stirring at 2500 RPM for 1 hour or more, a water-insoluble silicate solution was prepared.

(2) Preparation of primer composition

After separating only the water-insoluble silicate resin from the prepared water-insoluble silicate solution, an acrylic resin having a pH of 9 or higher was added thereto and mixed for 15 minutes. After sufficient mixing, an aqueous urethane resin was added to the mixture and sufficiently stirred for 15 minutes, and the content of each component was according to Table 1 below.

After the stirring was completed, as additives, rosin ester, butyl ester and eorosyl 200 were added and mixed in the content range according to Table 1 below, and then bentonite was further added and mixed for 30 minutes or more. After the mixing was completed, a primer composition was prepared by post-addition of purified distilled water in an amount according to Table 1 below, and the prepared primer composition was shown in Examples 1 to 5 according to the content of the added component. Table 1 shows.

<Comparative Example 1>

A primer composition was prepared in the same manner as in Example 2, except that a water-insoluble silicate resin was not used as the primer composition, and a silicate resin composed of sodium silicate and potassium silicate that had not been treated with a water-insoluble converting component was used instead. Table 1 shows.

<Comparative Example 2>

A primer composition was prepared in the same manner as in Example 2, except that a primer composition containing 2 wt% of a water-insoluble silicate resin in the primer composition was used.

Table 1 below summarizes the prepared primer compositions (Examples 1 to 5 and Comparative Examples 1 to 2).

Aqueous Primer Composition
(weight%) Example 1 Example 2 Example
3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 water insoluble
silicate resin 8.8 16 22 27.9 40 - 2 sodium silicate resin
+ Potassium silicate resin - - - - - 16 - acrylic resin 31 28 26 24 20 28 30 water-based urethane resin 9 8 7.4 7 8 8 8 Rosin Ester 4 4 4 3 4 4 4 butyl ester 2 2 2 2 2 2 2 bentonite 6 5.8 5 5 5.8 5.8 5.8 Aerosil 200 0.2 0.2 0.1 0.1 0.2 0.2 0.2 post-distilled water 39 36 33.5 31 20 36 48 Sum 100 100 100 100 100 100 100

Adhesive strength, penetration performance, curing state measurement

The prepared primer composition was coated on a wet substrate in the following way to form a specimen coating film, and then the penetration performance and the coating film curing state of the primer composition were measured by visually observing the formed coating film. 2 is shown.

<The psalm film>

20 specimens of 5 cm wide, 15 cm long, and 6 mm thick CRC boards each were completely immersed in water for 24 hours, then took out and wiped the surface to be primed with a dry cloth. Apply.

After that, the specimen coated with the primer composition is immersed in water halfway (about 3 mm) and left still. After confirming that the coated surface is cured after 8 to 12 hours, attach the asphalt sheet and measure the adhesive strength after 2 hours. At this time, the adhesive strength is measured using a universal tester. measured.

(◎: Excellent, ○: Good, △: Poor, x: Very poor) Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Adhesive strength (N/mm) 1.1 2.3 1.8 1.4 1.2 1.6 1.4 1.0 2.4 1.6 1.5 1.0 1.8 1.2 1.5 2.1 1.9 1.7 1.4 1.6 1.4 1.2 2.3 1.9 1.4 1.0 1.5 1.5 1.2 2.4 1.6 1.6 1.0 1.5 1.2 ave:1.2 ave:2.3 ave:1.8 ave:1.6 ave:1.1 ave:1.6 ave:1.3 Penetration performance △ ◎ ○ ○ △ △ △ film hardening △ ◎ ○ △ △ △ △ water resistance △ ◎ ○ △ △ x x

As shown in the results according to Examples and Comparative Examples according to Table 2, when the water-insoluble silicate resin according to the present invention is included in 16 wt%, the best adhesive strength (average adhesive strength is 2.3 N/m), penetration It shows the performance and the cured state of the coating film, and then, when the water-insoluble silicate resin is included in 22 wt%, the second improved adhesive strength (average adhesive strength is 1.8 N/m), the penetration performance and the cured state of the coating film It can be confirmed that there is

Accordingly, in the case of the primer composition according to the present invention, it can be seen that the adhesive strength is good, and the penetration performance, the cured state of the coating film and the adhesive strength are excellent, so that it can be seen that there is a possibility of application according to the implementation of the improved physical properties.

Claims (12)

An aqueous primer composition coatable on a wet surface, the primer composition comprising 10 to 50 water-insoluble silicate resins formed by adding a water-insoluble converting component to a mixture of sodium silicate resin and potassium silicate resin, based on the total weight of the composition weight%; 20 to 40% by weight of an acrylic resin; 5 to 15% by weight of a urethane resin, a urea resin, or a mixture thereof; 20 to 55% by weight of water; and 3 to 15% by weight of an additive,
The additives include coagulants, tackifiers, inorganic fillers, viscosity modifiers, curing accelerators, antioxidants, retarders, flame retardants, binders, pigments, surfactants, adjuvants, defoamers, plasticizers, dispersants, UV stabilizers, anti-settling agents, flow control agents and An aqueous primer composition that can be coated on a wet surface, characterized in that at least one selected from the group consisting of moisture absorbents.
The method of claim 1,
The aqueous primer composition comprises 10 to 30% by weight of a water-insoluble silicate resin, based on the total weight of the composition; 20 to 35% by weight of an acrylic resin; 5 to 10% by weight of a urethane resin, a urea resin, or a mixture thereof; And an aqueous primer composition coatable on a wet surface comprising 25 to 50% by weight of water.
delete The method of claim 1,
The water-insoluble conversion component is an aqueous primer composition coatable on a wet surface, characterized in that it is added in an amount of 50 to 150 parts by weight based on 100 parts by weight of a mixture of sodium silicate resin and potassium silicate resin.
The method of claim 1,
The water-insoluble conversion component is any one selected from the group consisting of zinc oxide, kaolin, aluminum hydroxide, nano-silica, copper sulfate, boron oxide (B ₂ O ₃ ), magnesium oxide (MgO) and aluminum oxide (Al ₂ O ₃ ) An aqueous primer composition that can be coated on a wet surface, characterized in that the above is used.
6. The method of claim 5,
The water-insoluble conversion component is an aqueous primer composition that can be coated on the wet surface, characterized in that a mixed solution of zinc oxide, kaolin, aluminum hydroxide, and nano-silica is used.
delete In the method for producing an aqueous primer composition that can be coated on a wet surface,
(a) to 100 parts by weight of a mixture of sodium silicate resin and potassium silicate resin, 50 to 150 parts by weight of a water-insoluble converting component that converts the mixture into a water-insoluble resin that does not dissolve in water is added and stirred to obtain a water-insoluble silicate resin manufacturing;
(b) adding 20 to 40 wt% of an acrylic resin and 5 to 15 wt% of a urea resin, a urethane resin, or a mixture thereof to 10 to 50 wt% of the water-insoluble silicate resin and stirring to prepare a complex mixture component ; and
(c) adding 20 to 55% by weight of water to the complex mixture component and stirring to prepare an aqueous primer composition;
Before or after step (b), a coagulant, a tackifier, an inorganic filler, a viscosity modifier, a curing accelerator, an antioxidant, a retardant, a flame retardant, a binder, a pigment, a surfactant, an auxiliary agent, an antifoaming agent, a plasticizer, a dispersant, an ultraviolet stabilizer , An anti-settling agent, a flow control agent, and a method for producing an aqueous primer composition, characterized in that it further comprises the step of adding 3 to 15% by weight of any one or more additives selected from the group consisting of a water absorbent.
9. The method of claim 8,
The water-insoluble conversion component is any one selected from the group consisting of zinc oxide, kaolin, aluminum hydroxide, nano-silica, copper sulfate, boron oxide (B ₂ O ₃ ), magnesium oxide (MgO) and aluminum oxide (Al ₂ O ₃ ) Method for producing an aqueous primer composition, characterized in that the above is used.
9. The method of claim 8,
The method for producing an aqueous primer composition, characterized in that the acrylic resin has a pH of 9 or more.
delete 9. The method of claim 8,
The prepared aqueous primer composition comprises 10 to 30% by weight of a water-insoluble silicate resin; 20 to 35% by weight of an acrylic resin; and 5 to 10% by weight of a urea resin, a urethane resin, or a mixture thereof; A method for producing an aqueous primer composition comprising 25 to 50% by weight of water.