KR101039376B1 - Inorganic polyurethan waterproofing material and waterproof method thereof - Google Patents

Abstract

PURPOSE: A water-dispersible inorganic polyurethane waterproof material is provided to ensure excellent hot water resistance, cold resistance, and durability, and to easily form the thickness required for one-time coating construction at room temperature. CONSTITUTION: A water-dispersible inorganic polyurethane waterproof material includes a base material, a hardener and a dry mortar in a ratio of 1.0 : 1.0 : 1.0 ~ 10. The base material comprises 30~40 weight% of polyol in which a ratio of OH equivalent of polyol in the base material to NCO equivalent of isocyanate in the hardener is 1.0 : 1.0~4.0; 1~10 weight% of chain extender; 1~10 weight% crosslinking agent; 0.1~3 weight% fluidifier; 1~15 weight% of viscosity control agent; 1~15 weight% of thixotropy imparting agent; and 20~34 weight% of water.

Description

Inorganic polyurethan waterproofing material and waterproof method

The present invention relates to a water-dispersible inorganic polyurethane waterproofing material and a coating film waterproofing method using the same, in particular, to solve the difficult problem of waterproof construction on the wet base surface, after the surface surface treatment and primer process to be excluded, 1 By applying the base layer to a predetermined thickness by applying the coating, not only the repeated construction is required, but also the occurrence of bubbles and pinholes in and out of the coating film is prevented in advance, and the base layer applied to the wet base surface once is the base surface. The present invention relates to a water-dispersible inorganic polyurethane waterproof material and a coating film waterproofing method using the same, which absorbs or decomposes moisture, thereby adhering to a base surface while making the wet construction smooth.

In the conventional waterproofing method, more than 50% of the total waterproofing work is a urethane waterproofing method.

Most of the urethane waterproofing method is composed of two-part type main body and hardener, and it has excellent elongation, tensile rate and durability, and it forms a seamless waterproof layer, so it is easy to construct complicated or vertical parts, and repair is possible even if the waterproof layer is damaged. It was easy.

However, regardless of the subject matter, when a substance called isocyanate (NCO) contained in the curing agent reacts with water and reacts with water, carbon dioxide is generated and the waterproof layer swells, causing pinol and excitation. Was only possible if the moisture content was less than 8% (not only the dryness of the bottom surface at the time of visual confirmation, but also no moisture in the mother).

In addition, in Korea, where the four seasons are clear, it is very difficult to meet the conditions of waterproof construction because it is very difficult to construct the water content of 8% or less on the base of the outdoors due to severe weather fluctuations.

In particular, the wet base surface must be surface-treated before the urethane waterproofing, there was a hassle that the primer process must be carried out to ensure the adhesion.

The present invention devised to solve the problems of the conventional urethane waterproofing method is to have a thickness required by coating once at room temperature while having a water-dispersible inorganic polyurethane waterproofing material having excellent hot water resistance, cold resistance and durability. It can be easily formed to prevent work delays due to repetitive construction, and to ensure adhesion even on wet base surface (12% water content, slightly wet when visually confirmed). It is an object of the present invention to provide an inorganic polyurethane waterproof material and a coating waterproofing method using the same, which can reduce labor costs by eliminating the rapid process and shortening of air.

The above-mentioned purpose is to use environmentally friendly oil (polyol) collected from plants, and the equivalent ratio with the curing agent is (OH equivalent of the subject polyol): (curing agent isocyanate NCO equivalent) = 1.0: polyol in a ratio of 1.0 to 4.0 (component A). ) 30 to 40% by weight, 1 to 10% by weight of chain extender (component B), 1 to 10% by weight of crosslinking agent (component C), 0.1 to 3% by weight of fluidizing agent (component D) (Component E) a main composition consisting of a mixture of 1 to 15% by weight, 1 to 15% by weight of a thixotropic agent (component F), and 20 to 34% by weight of water (component G); A curing agent composed of a prepolymer having at least two isocyanate groups (-NCOs) prepared by reacting aromatic and aliphatic isocyanate monomers or aromatic and aliphatic isocyanates with polyols; It is composed of a functional dry mortar, the mixing ratio of the subject: curing agent: dry mortar is achieved by a water-dispersible inorganic polyurethane waterproof material, characterized in that consisting of 1.0: 1.0: 1.0 ~ 10.

In addition, the dry mortar is composed of a mixture of at least one or more of aggregate, cement, filler, foam inhibitor, dispersant (fluidizer), cement setting time regulator, corrosion inhibitor, thixotropy agent, and is mixed according to the function of the waterproofing material. It is desirable to allow the addition ratio of the components to vary.

On the other hand, the above object, the base surface cleaning step to remove the foreign matter on the base surface to be waterproof; A base layer applying step of forming a base layer by securing 0.5 mm to 1 mm of the water-dispersible inorganic polyurethane waterproofing material on the base surface after the base surface cleaning step; When the base layer is cured by the base layer coating step, it is also achieved by the coating film waterproofing method using a water-dispersible inorganic polyurethane waterproof material, characterized in that it comprises a finish layer coating step of applying a urethane-based waterproofing material to form a finishing layer. .

Here, the inorganic polyurethane waterproof material is synthesized a plurality of species by the mixing ratio difference of the dry mortar in consideration of the functionality of the dry mortar (Dry mortar) required according to the environmental conditions of the base surface, It is desirable to allow at least one of the adoption changes.

The present invention is a urethane waterproofing method that was possible only in the wet base surface water content of 8% or less (not only the dry state of the bottom surface when the naked eye is checked, but also the state in which the moisture is not impregnated in the mother). By making it possible to install even when it is slightly wet), it is very easy to meet the construction conditions of waterproof construction, and it is possible to apply on the wet bottom surface, thus eliminating the use of primer, which is an organic solvent, and enables eco-friendly waterproof construction. Has the effect of

In addition, by eliminating the surface treatment and primer process of the base surface, it is possible to perform a rapid process, the construction period is shortened, there is an advantage of improving productivity and reducing labor costs, and smoothness to form a base layer of a predetermined thickness by one application Not only do not need to repeat the construction by the use of the spike rollers because there is no bubble and pinhole inside and outside by the use of the spike roller has the advantage of dense coating and excellent physical properties.

The water dispersible inorganic polyurethane waterproofing material according to the present invention is composed of a main body, a hardener, and a dry mortar. That is, the water-dispersible inorganic polyurethane waterproofing material according to the present invention is composed of dry mortar containing a main body, a hardener and cement as a three-component type, and is an environmentally friendly product because it does not contain volatile organic solvents (VOCs) as a water-dispersible type.

In addition, it is polyurethane-based and water-soluble, so it has excellent adhesion even at high water content of concrete, and has excellent trackability against shrinkage and expansion of concrete, and is full of VOCs-free inorganic (Dry mortar) without using any organic solvent (TXB). It is excellent in workability and containing 70% or more with respect to a composition can be said to be a preferable Example.

The water-dispersible inorganic polyurethane waterproofing material of the present invention is composed of a hardener containing an isocyanate group (-NCO) and a main body containing a hydroxyl group (-OH), a hydraulic aggregate, silica sand, cement, a filler, a dispersant, and the like. It consists of dry mortar.

The subject of the waterproofing material according to the present invention uses an eco-friendly oil (polyol) collected from plants and the equivalent ratio with the curing agent is (OH equivalent weight of the main polyol): (curable isocyanate NCO equivalent weight) = 1.0: 1.0 to 4.0 The polyol may be a main component, and the curing agent may be made of a prepolymer having at least two isocyanate groups (-NCO) prepared by reacting an aromatic and aliphatic isocyanate monomer or an aromatic and aliphatic isocyanate with a polyol.

As the aromatic isocyanate, toluene diisocyanate (TDI) diphenylmethane diisocyanate (MDI) polymeric MDI tolidine diisocyanate (TODI) p-phenylene isocyanate having two or more isocyanate groups may be used. Hexamethylene diisocyanate hydrogenated MDI isophorone diisocyanate and the like can be used.

That is, the main material uses eco-friendly oil (polyol) collected from plants, and the equivalent ratio with the curing agent is (OH equivalent of the subject polyol): (curing agent isocyanate NCO equivalent) = polyol (component A) in a ratio of 1.0: 1.0 to 4.0. 30 to 40% by weight, 1 to 10% by weight of chain extender (component B), 1 to 10% by weight of crosslinking agent (component C), 0.1 to 3% by weight of fluidizing agent (component D), It consists of a mixture of 1-15 wt% of component E), 1-15 wt% of thixotropic imparting agent (component F), and 20-34 wt% of water (component G).

Here, the polyol (component A) includes polyoxyethylene-based glycol polyester-based polyol polybutadiene-based polyol hydrogenated polybutadiene-based polyol castor oil and hydrogenated castor oil. The proper amount of polyol is (OH equivalent of main polyol): (curing agent isocyanate NCO equivalent) = 1.0: 1.0-4.0.

In addition, in order to produce a water-dispersible inorganic polyurethane waterproofing material by the method of the present invention, in addition to the polyol compound, a chain extender (component B) having two or more active hydrogen functional groups may be selectively used.

The chain extender has a low molecular weight diol having 12 or less carbon atoms and an alkylene side chain which is a polycondensate of 2-butyl-2-ethylpropane-1,3-diol and adipic acid having hydroxyl groups at both ends with molecular weights of 1000 to 3000. Polyesterpolyols. The polyester polyol having an alkylene side chain has excellent resistance to hydrolysis due to its molecular structure, and is easy to handle with a viscosity of 1 to 30 cps at room temperature.

The proper mixing ratio of the chain extender is 1 to 10% by weight based on the total weight of the main body.

In addition, in the present invention, in order to improve the crosslinking between the chains to improve the mechanical strength, it is possible to use a crosslinking agent (component C) having three or four functional groups.

Examples of the crosslinking agent (component C) of three or more active hydrogen functional groups include glycerol, trimethylolpropane, pentaerythritol, trihydroxycyclohexane, tetra (2-hydroxyethyl) ethylenediamine, and tetra (2-hydroxypropyl) Ethylenediamine, oligomeric polyoxyalkylenepolyols can be used.

The proper mixing ratio of the crosslinking agent is 1 to 10% by weight based on the total weight of the main material.

In the present invention, the fluidizing agent (component D) is a polyligninsulfonic acid condensate system (LSF) known as a concrete admixture as an additive used to increase the fluidity of dry mortar composed of hydraulic cement. Polycarboxylic acid-based (PC) polymelaminesulfonic acid condensate (PMS) commonly used surfactants such as phosphate esters and nonionic surfactants anionic surfactants, etc. can be used. 0.1 to 3% by weight is appropriate.

The viscosity reducing agent (component E) used in the present invention lowers the viscosity of the resin mixed with the main agent and the hardener, thereby improving the mixing property, the curing property, the finishing workability with the cement and the aggregate, and suppressing the foaming. Phosphoric acid, such as dioctyl phthalate (DOP), dibutyl phthalate, dinonyl phthalate, dibutyl phthalate, butylbenzyl phthalate, dioctyl adipicate, 2,2,4-trimethyl-1 , 3-pentanediol diisobutylate, trimellitate, benzoic acid ester, ethylcyclonucleic acid, liquid paraffin, and these may be used alone or in combination of one or more. The amount is suitably 1 to 15% by weight based on the total weight of the subject.

In addition, as a thixotropic imparting agent (component F) for controlling flowability (pyriticity) during wall construction, the modified urea system is preferably mixed, wherein the amount of the thixotropic imparting agent is used as the total weight of the subject. 1 to 15% by weight of is suitable.

Water (component G) used in the present invention refers to distilled water, and the appropriate amount thereof is 20 to 34% of the total weight of the main body.

As cement used in the present invention, hydraulic cements such as portland cement back cement blast furnace cement fly ash cement and alumina cement are used in the market, and an appropriate amount of 10-10% of the total weight of dry mortar is appropriate. .

The fillers used in dry mortar include particulate fillers such as fly ash, slag, silica fume, calcium carbonate and barium sulfate, and fibers such as carbon fiber, glass fiber, aramid fiber, iron fiber, rock wool and ceramic fiber. There is a type filler, and the appropriate amount of filler is 0.1 to 90% of the dry mortar weight.

As aggregates used in dry mortar, siliceous materials such as sand and gravel and organic aggregates such as rubber chips and plastics are used. Aggregates having a particle size of 1 mm or more are used. The appropriate amount of aggregate is 0.1 to 90 weight of dry mortar. %to be.

Examples of foam inhibitors used in dry mortar include the reaction between the main agent and the hardener such as calcium oxide, magnesium oxide, barium oxide, sodium hydroxide, potassium hydroxide, lithium hydroxide, calcium hydroxide, barium hydroxide, magnesium hydroxide, calcium silicate, barium silicate, sodium silicate, etc. There is a particulate additive that absorbs and removes the carbon dioxide generated in, and their appropriate amount is 0.1 to 90% by weight of the mortar.

On the other hand, in the dry mortar, it is preferable to selectively mix the modified urea system, which is a thixotropic imparting agent, as an additive in order to control the flow property (disotropy) during the construction of the wall, wherein the amount of the thixotropic imparting agent is It is preferable that it is 0.1 to 90 weight% of the mortar weight.

Filler Aggregate Foam Inhibitor Functional Additives in Dry Mortar may be optionally used, but Hydraulic Cement is an essential ingredient of more than 10% by weight based on the weight of dry mortar to provide sufficient basicity to absorb the carbon dioxide produced when the subject reacts with water. Should be used.

Since the structures of the above-described main materials, hardeners, and dry mortars are in the form of a combination of a soft segment formed of a polyol bond and a hard segment formed of an isocyanate bond, it has excellent weather resistance impact resistance and crack harvestability.

Referring to the coating film waterproofing method using the water-dispersible inorganic polyurethane waterproof material synthesized as described above is as follows.

First, the base surface cleaning step of removing the foreign matter on the base surface to be waterproofed is performed.

Here, the base surface clean-up step does not mean a process of surface treatment of the bottom surface of the base surface, but rather means to remove foreign substances remaining on the base surface. It means to drop the moisture content of the base surface below 12%.

In addition, when the base surface is cleaned by the base surface cleaning step as described above, by applying a water-dispersible inorganic polyurethane waterproofing material 0.5 mm ~ 1mm to the base surface to perform a base layer coating step to secure the base layer formation and smoothness do.

Here, the water-dispersible inorganic polyurethane waterproof material, at least one or more of a plurality of species synthesized by the difference in the mixing ratio of dry mortar in consideration of the functionality of the dry mortar (Dry mortar) required according to the environmental conditions of the base surface It is selected and then applied in consideration of this functionality.

On the other hand, when the base layer is cured by the base layer coating step, by applying a urethane-based waterproofing material (pure urea, hybrid, urethane, hydrocurable urethane, etc.) to perform a finish layer application step to form a finish layer, waterproof construction It's done.

On the other hand, comparing the adhesion of the water-dispersible inorganic polyurethane waterproofing material and the general primer according to the present invention in Table 1 as follows. (5-8% water content basis)

Product Type Adhesion 1 time Episode 2 3rd time 4 times 5 times Urethane Primer (Oil) 0.3 0.2 0.3 0.3 0.3 Epoxy Primer (Oil) 0.9 0.7 0.7 0.9 0.8 Epoxy Primer (Aqueous) 0.8 0.8 0.8 0.9 0.8 Invention 2.3 2.1 2.1 2.1 2.2

As can be seen in the comparison of the adhesion of the present invention with the general primer of Table 1, it can be seen that the adhesion of the water-dispersible inorganic polyurethane composition is superior.

In addition, the adhesion test of the water-dispersible inorganic polyurethane waterproofing material and the waterproofing film according to the present invention are described in Table 2 below.

Sandpaper Processing Status Sandpaper no treatment +
Primer application Sandpaper Processing +
Primer application No treatment process UP-100 URP-110 UP-100 URP-110 Inorganic Polyurethane Compositions Inorganic Polyurethane Compositions Inorganic Polyurethane Compositions Pure Urea 3.2 3.3 3.5 3.5 3.4 2.4 Peeling interface Dolly interface Dolly interface Dolly interface Dolly interface Dolly interface hybrid 3.5 3.5 3.5 3.5 3.5 3.5 Peeling interface Dolly interface urethane 3.1 3.0 3.3 3.4 3.3 2.3 Peeling interface Dolly interface Dolly interface Dolly interface Dolly interface Remarks ※ Measurement of adhesion after 5 days after urea application (Dollytester: Max.-3.5N / mm2)
※ Measurement Unit: N / mm2

Experimental conditions

1.Base Type: Water Dispersible Inorganic Polyurethane Waterproofing Material

2.Treatment Condition: Sandpaper (100 rooms), no treatment

3.Substrate Product: Oily Primer

4.Medium product: Urethane coating material (Pure urea, Hybrid, Urethane)

In Table 2, it can be seen that the adhesion performance of the water-dispersible inorganic polyurethane waterproofing material and the urethane-based waterproofing material is excellent regardless of the sand paper treatment and the primer coating.

On the other hand, the adhesion of the water-dispersible inorganic polyurethane waterproofing material of the present invention according to the water content is shown in Table 3.

Concrete surface moisture content Adhesive force (1mm applied) 1 time Episode 2 3rd time 4 times 5 times 5% 2.0 2.2 2.1 2.2 2.2 8% 2.3 2.1 2.1 2.1 2.2 12% 2.0 1.9 2.1 2.1 1.9 15% 1.9 2.2 2.0 2.0 1.9

As can be seen from Table 2 and Table 3, the present invention shows superior adhesion to primer epoxy or urethane primer even when the water content is 8% or more, that is, the water content is 12% or 15% of the concrete surface. And it can be seen that it has excellent adhesion performance with or without the primer.

Claims (4)

Eco-friendly oil (polyol) from plants is used, and the equivalent ratio with the curing agent is (OH equivalent of the main polyol): (curing agent isocyanate NCO equivalent) = 1.0: 1.0 to 4.0 polyol (component A) in a ratio of 30 to 40 weight %, 1 to 10% by weight of a chain extender (component B), 1 to 10% by weight of a crosslinking agent (component C), 0.1 to 3% by weight of a fluidizing agent (component D), and a reducing agent (component E) 1 A main composition consisting of a mixture of ˜15% by weight, 1-15% by weight of a thixotropic agent (component F), and 20-34% by weight of water (component G);
A curing agent composed of a prepolymer having at least two isocyanate groups (-NCOs) prepared by reacting aromatic and aliphatic isocyanate monomers or aromatic and aliphatic isocyanates with polyols;
Consists of functional dry mortar,
Theme: Curing agent: Water-dispersible inorganic polyurethane waterproofing material, characterized in that the mixing ratio of dry mortar is 1.0: 1.0: 1.0 ~ 10. The method of claim 1,
The dry mortar,
It consists of a mixture of at least one of aggregate, cement, filler, foam inhibitor, dispersant (fluidizer), cement setting time control agent, corrosion inhibitor, thixotropy agent, and the ratio of addition of components to be mixed according to the function of the waterproofing material is variable. Water-dispersible inorganic polyurethane waterproofing material characterized in that. A base surface cleaning step of removing foreign substances on a base surface to be waterproofed;
A base layer coating step of applying a water dispersible inorganic polyurethane of claim 1 or 2 to 0.5 mm to 1 mm on the base surface to form a base layer and ensuring smoothness after the base surface cleaning step;
When the base layer is cured by the base layer coating step, the coating layer waterproof method using a water-dispersible inorganic polyurethane waterproof material, characterized in that it comprises a finish layer coating step of forming a finish layer including a urethane-based waterproofing material. The method of claim 3,
The water dispersible inorganic polyurethane waterproofing material,
Considering the functionality of the dry mortar required according to the environmental conditions of the base surface, a plurality of species are synthesized by the difference in the mixing ratio of the dry mortar, and at least one or more of the plurality of species are adopted and changed in consideration of the functionality. Coating waterproof method using water-dispersible inorganic polyurethane waterproof material.