KR102273251B1 - Ccomplex water proofing process using eco-friendly polyurethane water proofing coat and water proofing sheet - Google Patents

Abstract

In accordance with the present invention, provided is a complex waterproofing method including an eco-friendly polyurethane waterproof coating and a waterproof sheet. The method includes the following steps: (1) applying primer to the whole surface of foundation concrete; (2-1), in some cases, forming a primary waterproof coating on the primer with an eco-friendly polyurethane composition; (2-2) placing waterproof sheets on the primary waterproof coating at an interval of 5-10 ㎜; (3) reinforcing a gap between the waterproof sheets with the eco-friendly polyurethane composition; (4) forming a waterproof sheet layer by connecting the waterproof sheets through adhesive reinforcement tape; and (5) forming a waterproof coating layer by applying the eco-friendly polyurethane composition onto the reinforced waterproof sheet layer. In accordance with the present invention, the complex waterproofing method can form a complex waterproof coating having excellent workability, mechanical properties and eco-friendliness by applying both a coating waterproofing method and a sheet waterproofing method.

Description

Composite waterproofing method including eco-friendly polyurethane waterproofing film and waterproofing sheet {CCOMPLEX WATER PROOFING PROCESS USING ECO-FRIENDLY POLYURETHANE WATER PROOFING COAT AND WATER PROOFING SHEET}

The present invention relates to a composite waterproofing method comprising an eco-friendly polyurethane waterproofing film and a waterproofing sheet.

In general, inorganic materials such as concrete or mortar that form buildings may crack due to heat of hydration or various vibrations caused by the hydration reaction of cement. There is a structural problem that further weakens the durability of city buildings and accelerates aging. In order to prevent or repair cracks that occur in these concrete structures, the waterproofing method is implemented.

Polyurethane is widely used in coating film waterproofing method due to its dense structure and excellent waterproofing properties. In the polyurethane coating waterproofing method, the floor to be constructed is arranged, a primer is applied to it, and the primer is sufficiently penetrated into the floor to dry it, and then a liquid polyurethane resin is applied to the floor surface, dried and cured to form a polyurethane coating film of a certain thickness. This is a way to waterproof it. This polyurethane coating waterproofing method has excellent elasticity, so it can maintain a certain level of waterproofing performance against cracks in the base, and it is relatively easy to install in a narrow or complicated area, and it is possible to perform seamless construction as well as relatively easy maintenance. There is one advantage.

However, since the polyurethane waterproofing method is a close-fitting method that adheres to the underlying surface such as concrete, it is difficult to fundamentally solve the cracks in the underlying surface, as well as the deterioration of adhesive performance according to the moisture content of the underlying surface, and the deterioration of the polyurethane coating film constructed when cracks occur. There are structural problems that weaken the durability of the structure due to water leakage due to damage or lifting, deterioration of adhesive performance due to moisture content of the substrate, formation of an uneven waterproof layer, and failure to comply with construction standards.

In order to solve this problem, a composite waterproofing construction method in which a polyurethane coating waterproofing method is applied together with a sheet waterproofing method using a waterproofing sheet has been applied in various ways. However, a satisfactory eco-friendly polyurethane composition having workability, physical properties and eco-friendliness suitable for use in such a composite waterproofing construction method is not yet known. In the composite waterproofing method developed so far, the construction period is calculated or adjusted flexibly, as well as the problem that the adhesive performance or adhesion performance is lowered due to the heterogeneous material characteristics between the internal and external environmental factors and the waterproofing layer and the sheet waterproofing layer. It is difficult to do it, and the problem that the reliability of waterproofness is low, and the problem that the eco-friendliness is not satisfactory are occurring complexly.

In this situation, in the composite waterproofing method of applying the coating film waterproofing method using the polyurethane composition together with the sheet waterproofing method, it is still required to develop a composite waterproofing method with satisfactory workability and mechanical properties as well as excellent environmental properties.

An object of the present invention is to solve the above-mentioned problems to develop a composite waterproofing method with satisfactory workability and mechanical properties as well as excellent environmental properties.

The problem to be solved by the present invention is not limited to the problem(s) mentioned above, and another problem(s) not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above object, the present invention provides a composite waterproofing method comprising an eco-friendly polyurethane waterproofing film and a waterproofing sheet comprising the following steps:

(Step 1) applying a primer to the entire base concrete surface;

(Step 2) disposing a waterproof sheet on the primer at intervals of 5 to 10 mm;

(Step 3) reinforcing the gap between the waterproof sheets with an eco-friendly polyurethane composition;

(Step 4) forming a waterproof sheet layer by connecting between the waterproof sheets with an adhesive reinforcing tape; and

(Step 5) Forming a waterproof coating layer by applying an eco-friendly polyurethane composition on the waterproof sheet layer.

According to an embodiment of the present invention, step 2 may include the following steps:

(Step 2-1) forming a first waterproof coating film with an eco-friendly polyurethane composition on the primer; and

(Step 2-2) A step of arranging waterproof sheets at intervals of 5 to 10 mm on the first waterproof coating film.

According to an embodiment of the present invention, in (step 2-1), the first waterproof coating film can be installed up to the corner where the wall and the slab meet.

According to an embodiment of the present invention, for example, in step 2 or step 2-2, the waterproof sheet may be arranged so that the corners are in contact without a gap or the corners overlap.

According to an embodiment of the present invention, the waterproof sheet may be at least one selected from the group consisting of improved asphalt, synthetic rubber, modified rubber, vinyl chloride (PVC), and TOP.

According to an embodiment of the present invention, the waterproof sheet may have a polyester long fiber nonwoven fabric, polypropylene nonwoven fabric, silica sand or sand, high density polyethylene film attached to or formed on the upper part, and/or long fiber nonwoven fabric on the lower part. , polypropylene nonwoven fabric, silica sand or sand may be attached or formed.

According to an embodiment of the present invention, the eco-friendly polyurethane composition comprises (A) 20 to 40 parts by weight of a polyol having 2 to 3 functional groups, 1 to 3 parts by weight of a polyaldimine as a chain extender, and 1 to 1 to a nonphthalate-based plasticizer. 3 parts by weight, 0.1 to 0.4 parts by weight of a dispersant, 0.1 to 0.4 parts by weight of an antifoaming agent, 1-3 parts by weight of a color pigment, 50 to 70% by weight of an extender as an inorganic filler, 0.4 to 1.0 parts by weight of a bismuth compound as a curing accelerator, and a solvent a main part containing 0.5 to 1.5 parts by weight; and (B) a curing part containing 85 to 95 parts by weight of a prepolymer having a free isocyanate (Free NCO) content of 3 to 6% by weight, and 5 to 15 parts by weight of a solvent. can be selected,

The (A) main part and (B) hardening part may be included in a weight ratio of 3-4: 1,

The bismuth compound may be at least one selected from bismuth octoate, bismuth naphthenate, bismuth propionate, bismuth maleinate, bismuth neothecanoid and bismuth neopentanoid,

The nonphthalate-based plasticizer may be at least one selected from the group consisting of DOTP (dioctyl terephthalate), ESO (epoxidized soybean oil), DINCH (dinonylcyclohexanedicarboxylate), and AMG (acetylated monoglyceride). can

According to an embodiment of the present invention, in the main part (A), the polyol is (i) 70 to 85% by weight of a low molecular weight polypropylene glycol diol having a weight average molecular weight (Mw) of 2,000 to 3,500, and (ii) a weight average It may contain 15 to 30% by weight of a polymer-type polypropylene glycol triol having a molecular weight (Mw) of 3,500 to 5,000.

According to an embodiment of the present invention, in the subject part (A), the polyaldimine may be selected from the compounds of Formula 1 below:

wherein n is 2 or 3,

Z is an aryl radical substituted by an alkyl group and/or an alkoxy group and having a total of 12 to 26 carbon atoms,

A is an n-valent having a molecular weight in the range of 42 to 6,000 g/mol, optionally containing ether oxygen and/or containing a bicyclic or tricyclic ring system, bonded through at least one tertiary or quaternary carbon atom aliphatic, cycloaliphatic or aromatic hydrocarbyl radicals.

According to an embodiment of the present invention, the polyaldimine is an isomer of diethyltoluenediamine (DETDA), an isomer of diethyltoluenamine, an isomer of di-(methylthio)toluenediamine, and di-(methylthio) It may be derived from one or more aromatic diamine compounds selected from the group consisting of toluene-diamine isomers.

According to an embodiment of the present invention, the polyaldimine may have an aldimine equivalent weight of 100 g/eq to 140 g/eq, preferably 110 g/eq to 130 g/eq.

According to an embodiment of the present invention, in the (B) cured part, the prepolymer has a free isocyanate content of 3 to 6% by weight, and (i) a low molecular weight polypropylene glycol having a weight average molecular weight (Mw) of 2,000 to 3,500. To the polyol mixed with diol and (ii) a high molecular weight polypropylene glycol triol having a weight average molecular weight (Mw) of 3,500 to 5,000, a polyisocyanate compound is added in an equivalent ratio of 1:1.0 to 2, and the reaction is carried out at 80 ° C. It may be prepared by carrying out until the free isocyanate (%) content falls within the above range, wherein the polyisocyanate compound is an aromatic polyisocyanate, such as toluene diisocyanate (TDI), diphenylmethane-4,4'-diisocyanate. (MDI), xylene diisocyanate (XDI), isophorone diisocyanate (IPDI), polymethylene polyphenyl polyisocyanate, or aliphatic polyisocyanate may be at least one selected from the group consisting of hexamethylene diisocyanate (HDI).

The composite waterproofing method according to the present invention can form a composite waterproofing film having excellent physical properties and environmental friendliness by performing both the coating film waterproofing method and the sheet waterproofing method.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

Hereinafter, various preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Before describing the present invention in detail, the terms or words used in this specification should not be construed as being unconditionally limited to their ordinary or dictionary meanings, and in order for the inventor of the present invention to describe his invention in the best way It should be understood that the concepts of various terms can be appropriately defined and used, and further, these terms or words should be interpreted as meanings and concepts consistent with the technical idea of the present invention.

That is, the terms used herein are only used to describe preferred embodiments of the present invention, and are not used for the purpose of specifically limiting the content of the present invention, and these terms represent various possibilities of the present invention. It should be noted that the term has been defined with consideration

Also, in the present specification, it should be noted that, unless the context clearly indicates otherwise, the expression in the singular may include a plurality of expressions, and may include the meaning of the singular even if similarly expressed in plural. do.

In the case where it is stated throughout this specification that a component "includes" another component, it does not exclude any other component, but further includes any other component unless otherwise stated. It could mean that you can.

In addition, in this specification, in specifying the reference numerals for each component of each drawing, the same component has the same reference number even if the component is shown in different drawings, that is, the same reference is made throughout the specification. Symbols indicate identical components.

In the drawings attached to this specification, the size, position, coupling relationship, etc. of each component constituting the present invention are partially exaggerated, reduced, or omitted for convenience of explanation or in order to sufficiently clearly convey the spirit of the present invention. may be described, and therefore the proportion or scale may not be exact.

In addition, in the following, in describing the present invention, a detailed description of a configuration determined that may unnecessarily obscure the gist of the present invention, for example, a detailed description of the known technology including the prior art may be omitted.

It is an object of the present invention to provide a composite waterproofing method comprising an eco-friendly polyurethane waterproofing film and a waterproofing sheet comprising the following steps:

(Step 1) applying a primer to the entire base concrete surface;

(Step 2) disposing a waterproof sheet on the primer at intervals of 5 to 10 mm;

(Step 3) reinforcing the gap between the waterproof sheets with an eco-friendly polyurethane composition;

(Step 4) forming a waterproof sheet layer by connecting between the waterproof sheets with an adhesive reinforcing tape; and

(Step 4) Forming a waterproof coating layer by applying an eco-friendly polyurethane composition on the reinforced waterproof sheet layer.

In the present invention, step 2 may include the following steps:

(Step 2-1) forming a first waterproof coating film with an eco-friendly polyurethane composition on the primer; and

(Step 2-2) A step of disposing waterproof sheets on the first waterproof coating film at intervals of 5 to 10 mm.

In the present invention, in the (step 2-1), the first waterproof coating can be installed up to the corner where the wall and the slab meet. Preferably, even in the above (step 3), up to the corner where the wall and the slab meet is reinforced with an eco-friendly polyurethane composition.

In the present invention, in the step 2 or step 2-2, the waterproof sheet may be arranged so that the corners are in contact without a gap or the corners overlap. In this case, the waterproof sheet may be adhered with an adhesive made of an eco-friendly polyurethane composition or other adhesive or fixed with a reinforcing tape. Adhesives and reinforcing tapes for reinforcing the waterproof sheet are not particularly limited and may be selected from those known or commonly used in the art. Preferably, an adhesive or reinforcing tape using the eco-friendly polyurethane composition according to the present invention may be used.

In the present invention, the waterproof sheet may be at least one selected from the group consisting of improved asphalt, synthetic rubber, modified rubber, vinyl chloride (PVC), and TOP, and in some cases, the waterproof sheet may be fibrous.

In the present invention, the waterproof sheet may have a polyester long fiber nonwoven fabric, polypropylene nonwoven fabric, silica sand and sand, high density polyethylene film, etc. formed or attached to the upper portion. In addition, the lower portion of the waterproof sheet, for example, instead of the release film, long fiber nonwoven fabric, polypropylene nonwoven fabric, silica sand and sand may be formed or attached.

In the present invention, the eco-friendly polyurethane composition does not use MOCA, which is harmful to the human body, as a chain extender, does not contain the four major heavy metals (lead, chromium, mercury, cadmium), and is manufactured without using a phthalate-based plasticizer , may not be particularly limited.

According to the present invention, among the above-mentioned eco-friendly polyurethane compositions, it is possible to use the eco-friendly polyurethane composition for two-component composite waterproofing including the following (A) main part and (B) hardening part:

(A) 20-40 parts by weight of a polyol having 2-3 functional groups, 1-3 parts by weight of polyaldimine as a chain extender, 1-3 parts by weight of a nonphthalate-based plasticizer, 0.1-0.4 parts by weight of a dispersant, 0.1-0.4 parts by weight of an antifoaming agent a main part containing 1 to 3 parts by weight of a coloring pigment, 50 to 70% by weight of an extender pigment as an inorganic filler, 0.4 to 1.0 parts by weight of a bismuth compound as a curing accelerator, and 0.5 to 1.5 parts by weight of a solvent; and

(B) A cured part containing 85 to 95 parts by weight of a prepolymer having a free isocyanate (Free NCO) content of 3 to 6% by weight, and 5 to 15 parts by weight of a solvent.

In the two-component composite waterproofing eco-friendly polyurethane composition, the main part and the hardening part may be included in a weight ratio of 3 to 4:1.

In addition, the polyol used in (A) the main part includes (i) 70 to 85 wt% of a low molecular weight polypropylene glycol diol having a weight average molecular weight (Mw) of 2,000 to 3,500, and (ii) a weight average molecular weight (Mw) of 3,500 to It may contain 15 to 30% by weight of a polymer-type polypropylene glycol triol having 5,000, preferably, they may each have a unimodal molecular weight distribution.

In general, MOCA [4,4'-Methylene bis(ortho-chloroaniline)], which is mainly used as a chain extender or an epoxy curing agent in the production of polyurethane or polyurea, improves the hardness of waterproof and moisture-proof urethane paints and mixes curing agents It has been used for a long time because it enables stable painting by securing an appropriate coating time afterward, but it has been confirmed as a carcinogenic substance that is harmful to the human body and causes cancer [Carcinogenicity of Some Aromatic Amines, Organic Dyes, and Related Exposures, The Lancet Oncology, Volume 9, Issue 4, Pages 322 - 323, April 2008). For this reason, MOCA has also been designated as a substance subject to manufacture, import, and sale of products containing 0.1% or more after September 2020 in Korea.

In order to solve this problem, Patent Registration No. 10-1777432 (Title of the Invention: Paint composition) tried to solve the problem by using a mixture of a number of primary and secondary bis-aromatic diamines, but the used diamines are expensive. The effect is not meeting expectations.

It has also been proposed to use a compound having an aldimine group, a ketimine group or an oxazolidine group, called a latent curing agent, which releases amino groups on contact with moisture and rapidly cross-links with isocyanate groups without the formation of carbon dioxide.

However, these latent curing agents are disadvantageous because they trigger premature crosslinking reactions, thereby reducing the storage stability of the composition, and/or may promote curing to an extent that results in too short open times and too short working times. is known

In addition, many known latent curing agents, upon curing, result in the release of a nuisance odor caused by volatile aldehydes or ketones generated through hydrolysis, which act as blocking agents in the latent curing agent.

In the present invention, in order to solve the problems associated with the existing chain extender and its substitutes, a polyaldimine compound of Formula 1 is used:

[Formula 1]

wherein n is 2 or 3,

Z is an aryl radical substituted by an alkyl group and/or an alkoxy group and having a total of 12 to 26 carbon atoms,

A is an n-valent having a molecular weight in the range of 42 to 6,000 g/mol, optionally containing ether oxygen and/or containing a bicyclic or tricyclic ring system, bonded through at least one tertiary or quaternary carbon atom aliphatic, cycloaliphatic or aromatic hydrocarbyl radicals.

The polyaldimine of formula (I) is odorless, pH-neutral, liquid or low-melting point and has relatively low viscosity at room temperature, low sensitivity to heat and moisture, and can be stored, transported, metered and processed in a simple manner. Therefore, it can be preferably used in polyurethane for composite waterproofing.

The polyaldimine of formula (I) is not only sterically unhindered and inert even at elevated temperatures with highly reactive aromatic isocyanates (eg MDI) to provide a composition with high storage stability, but also in the presence of moisture, although Although the reaction rate is slow, it reacts completely and without defects with the isocyanate. However, since the reaction can be accelerated by an appropriate catalyst (curing accelerator), it is possible to sufficiently control the reaction time. In addition, the aldehydes released upon hydrolysis are non-volatile, odorless and colorless, and do not cause any emission or odor generation or discoloration.

Since the polyaldimine of formula (I) has good compatibility in polyurethane, it does not require the addition of additional plasticizers and does not cause migration of plasticizers.

According to an embodiment of the present invention, in Formula 1, A is 1,2-propylene, 1,3-pentylene, 2-methyl-1,5-pentylene, 2,2(4),4-tthymethyl -1,6-hexamethylene, 1,2-cyclohexylene, (1,5,5-ttimethylcyclohexan-1-yl)methane-1,3, 4(2)-methyl-1,3-cyclo Hexylene, methylenebicyclohexan-4-yl, methylenebis(2-methylcyclohexan-4-yl), (bicyclo[2.2.1]heptane-2,5(2,6)-diyl)dimethylene, (tricyclo[5.2.1.0 ^2,6 ]decane-3(4),8(9)-diyl)dimethylene, α,ω-polyoxypropylene with an average molecular weight in the range of 170 to 5,000 g/mol and 330 trimethylolpropane- or glycerol-initiated tris(ω-polyoxypropylene) having an average molecular weight in the range of from to 6,000 g/mol.

Thus, diamines comprising A can be exemplified by: 1,2-propanediamine, 1,3-pentanediamine, 1,5-diamino-2-methylpentane (MPMD), 2,2(4) ),4-trimethyl-1,6-hexanediamine (TMD), 1,2-cyclohexanediamine, 1,3-cyclohexanediamine, 1,4-cyclohexanediamine, 1-amino-3-aminomethyl-3 ,5,5-Trimethylcyclohexane (isophoronediamine or IPDA), 4(2)-methyl-1,3-cyclohexanediamine, bis(4-aminocyclohexyl)methane, bis(4-amino-3-methyl Cyclohexyl)methane, 2,5(2,6)-bis(aminomethyl)bicyclo[2.2.1]heptane (norbornanediamine or NBDA), 3(4),8(9)-bis(aminomethyl) tricyclo[5.2.1.0 ^2,6 ]decane (TCD diamine), an α,ω-polyoxypropylenediamine having an average molecular weight in the range of 200 to 4,000 g/mol, in particular D-230, D-400 from Jeffamine®, XTJ-582, D-2000, XTJ-578 and D-4000 (all from Huntsman), and trimethylolpropane- or glycerol-started tris(ω) having an average molecular weight ranging from 380 to 6,000 g/mol. -polyoxypropyleneamine), in particular from the group consisting of Jeffamine® products T-403, T-3000 and T-5000 (all from Huntsman).

In the present invention, the following compounds may be mentioned as specific examples of the polyaldimine of formula 1: N,N'-bis(4-alkylbenzylidene)-1,2-cyclohexanediamine, N,N'- Bis(4-alkylbenzylidene)-3-aminomethyl-3,5,5-trimethylcyclohexylamine, N,N'-bis(4-alkylbenzylidene)-4(2)-methyl-1,3- Cyclohexanediamine, N,N'-bis(4-alkylbenzylidene)-bis(4-aminocyclohexyl)methane, N,N'-bis(4-alkylbenzylidene)-2,5(2,6) -Bis(aminomethyl)bicyclo[2.2.1]heptane, N,N'-bis(4-alkylbenzylidene)-3(4),8(9)-bis(aminomethyl)tricyclo[5.2.1.0 ^2,6 ]decane, N,N'-bis(4-alkylbenzylidene)polyoxypropylenediamine having an average molecular weight of 650 to 1050 g/mol and N,N',N having an average molecular weight of 1050 to 1350 g/mol ''-tris(4-alkylbenzylidene)polyoxypropylenetriamine, wherein alkyl in each case is a linear or in particular branched decyl, undecyl, dodecyl, tridecyl or tetradecyl radical.

Polyaldimine of Formula 1 is an advantageous property for use in a polyurethane composition for composite waterproofing, and exhibits excellent miscibility and low segregation tendency in the composition, and reacts with an isocyanate group (eg, cross-linking) in the absence of water or moisture. There is little triggering and, therefore, the resulting polyurethane composition can have very good storage stability. Finally, the aldehyde released upon curing is non-volatile and hydrolysis-stable, does not cause any odor sensation, has good compatibility with the cured polymer, and causes little bleeding or migration into the substrate.

In the present invention, the following aromatic diamines may be mentioned as specific examples of the polyaldimine of formula (1): 1,4-diaminobenzene, 2,4- and/or 2,6-diaminotoluene, 2 ,4'- and/or 4,4'-diaminodiphenylmethane, 3,3'-dimethyl-4,4'-diaminodiphenyl-methane, 3,3'-dichloro-4,4'- diaminodiphenylmethane (MOCA), 1-methyl-3,5-bis(methylthio)-2,4- and/or -2,6-diaminobenzene, 1,3,5-triethyl-2, 4-diamino-benzene, 1,3,5-triisopropyl-2,4-diaminobenzene, 1-methyl-3,5-diethyl-2,4- and/or -2,6-diamino benzene (also known as 3,5-diethyl-2,4- and/or -2,6-toluenediamine, or DETDA), 3,5-dithio methyl-2,4-diamino toluene (i.e. , ETHACURE 300), 4,6-dimethyl-2-ethyl-1,3-diaminobenzene, 3,5,3',5'-tetraethyl 4,4-diaminodiphenylmethane, 3,5,3 ',5'-Tetraisopropyl-4,4'-diamino-diphenylmethane, 3,5-diethyl-3',5'-diisopropyl-4,4'-diamino-diphenyl- Methane, 2,4,6-triethyl-m-phenylenediamine (TEMPDA), 3,5-diisopropyl-2,4-diamino-toluene, 3,5-di-sec-butyl-2, 6-diaminotoluene, 3-ethyl-5-isopropyl-2,4-diaminotoluene, 4,6-diisopropyl-m-phenylenediamine, 4,6-di-tert-butyl-m-phenyl Lendiamine, 4,6-diethyl-m-phenylenediamine, 3-isopropyl-2,6-diaminotoluene, 5-isopropyl-2,4-diaminotoluene, 4-isopropyl-6-methyl -m-phenylenediamine, 4-isopropyl-6-tert-butyl-m-phenylenediamine, 4-ethyl-6-isopropyl-m-phenylenediamine, 4-methyl-6-tert-butyl-m -Phenylenediamine, 4,6-di-sec-butyl-m-phenylenediamine, 4-ethyl-6-tertbutyl-m-phenylenediamine, 4-ethyl-6-sec-butyl-m-phenylene Diamine, 4-ethyl-6-isobutyl-m-phenylenediamine, 4-isopropyl-6-isobutyl-m-phenylenediamine, 4-isopropyl-6-sec-butyl-m-phenylenediamine , 4-tert-butyl-6-isobutyl-m-phenylenediamine, 4-cyclopentyl-6-ethyl-m-phenylenediamine, 4-cyclohexyl-6-isopropyl-m-phenylenediamine, 4, 6-dicyclopentyl-m-phenylenediamine, 2,2',6,6'-tetraethyl-4,4'-methylenebisaniline, 2,2',6,6'-tetraisopropyl4,4 '-Methylenebisaniline (methylenebis diisopropylaniline), 2,2',6,6'-tetra-sec-butyl-4,4'-methylenebisaniline, 2,2'-dimethyl-6,6' -di-tert-butyl-4,4'-methylenebisaniline, 2,2'-di-tert-butyl-4,4'-methylenebisaniline, and 2-isopropyl-2',6'-diethyl -4,4'-methylenebisaniline is mentioned. The diamines can, of course, also be used as mixtures. Among the above aromatic diamine compounds, aromatic diamine compounds containing two primary amine groups, for example, an isomer of diethyltoluenediamine (i.e., DETDA), an isomer of diethyltoluenamine, and di-(methylthio)toluenediamine (i.e., , ETHACURE 300), or a mixture of isomers of di-(methylthio)toluene-diamine can be particularly preferably used.

According to an embodiment of the present invention, the polyaldimine is an isomer of diethyltoluenediamine (ie, DETDA), an isomer of diethyltoluenamine, and an isomer of di-(methylthio)toluenediamine (ie, ETHACURE 300). It may be derived from one or more aromatic diamine compounds selected from the group consisting of mixtures and mixtures of isomers of di-(methylthio)toluene-diamine, and a mixture of the isomers may be used.

According to an embodiment of the present invention, the polyaldimine may have an equivalent weight of 100 g/eq to 140 g/eq, preferably 110 g/eq to 130 g/eq of aldimine. As the aldimine equivalent increases, the gelation time becomes longer and workability can be improved, but on the other hand, physical properties such as hardenability, tensile strength, tear strength, elongation and hardness tend to decrease. That is, when the aldimine equivalent of polyaldimine is lower than the above range, workability is deteriorated, and when it is higher than the above range, there is a possibility that physical properties may be deteriorated. Therefore, in the present invention, the aldimine equivalent of polyaldimine is preferably selected within a range of 100 g/eq to 140 g/eq in which workability and physical properties of the resulting polyurethane can be balanced.

In the present invention, the bismuth compound has the characteristics of a group 13 heavy metal series, and thus has the advantage of promoting product hardening while being environmentally friendly. In some cases, when only the bismuth compound is used as a curing accelerator for the polyol curing agent, there may be problems of reduced mechanical strength and reduced workability due to shortened pot life. Therefore, when the bismuth compound is included in the polyol curing agent together with the zinc compound, curing reaction It is possible to obtain the effect of improving the workability by improving the mechanical strength and adjusting the curing reaction time by accelerating the crosslinking reaction.

According to an embodiment of the present invention, the bismuth compound may be selected from bismuth octoate, bismuth naphthenate, bismuth propionate, bismuth maleinate, bismuth neothecanoid and bismuth neopentanoid.

The bismuth compound may be included in the above-mentioned amount, alternatively from 0.01 to 5% by weight, preferably from 0.4 to 1% by weight in the main part. When the content of the polyol is within the above range, there is an effect of securing workability and increasing the expansion and contraction rate according to the reaction rate control, and increasing the mechanical strength.

According to one embodiment of the present invention, a zinc compound or a mixture with a zinc compound may be used instead of the bismuth compound as the curing accelerator.

Therefore, the zinc compound is 0.01 to 5% by weight in the main part. Preferably, it may be included in an amount of 0.4 to 1% by weight. When the content of the zinc compound is within the above range, there is an effect of increasing mechanical strength and reducing tackiness by promoting the crosslinking reaction. The zinc compound may include one selected from zinc octoate, zinc naphthenate, zinc propionate, zinc maleinate, zinc neothecanoid, zinc neopentanoide, and zinc carboxylate, but is limited thereto no.

The polyol curing agent preferably contains a bismuth compound to a zinc compound in a weight ratio of 1:0.1 to 10. When the weight ratio of the bismuth compound to the zinc compound is within the above range, mechanical strength is improved and the curing reaction time is controlled by accelerating the crosslinking reaction during the curing reaction.

According to an embodiment of the present invention, as the curing accelerator, in addition to the bismuth compound and/or the zinc compound, a tertiary amine compound may be further included.

The tertiary amine compound serves as a catalyst for isocyanate-hydroxyl (a reaction in which a polymer gel is formed due to the growth of a polymer chain), an isocyanate-water (a reaction in which CO ₂ gas is produced by the foaming reaction) reaction, particularly It plays a catalytic role in the trimerization of isocyanate, which is called polyisocyanate reaction (PIR), in which the rate of polymer formation and the rate of gas generation are balanced so that the gas has sufficient strength (breaking) of the cell wall composed of the polymer gel. It is preferable that it is finally cured by being surrounded by (without shrinkage or shrinkage).

In addition, the most suitable factors for the catalytic reactivity of the tertiary amine compound are basicity and the degree of steric hindrance of the nitrogen atom site of the amino group. As the basicity increases and the steric hindrance decreases, the catalytic activity generally increases, and the ability to cause hydrogen bonding Depending on the degree of spatial separation between the and activation sites, the catalyst selectivity may be affected.

The tertiary amine compounds that can be used in the present invention include 1,4-diazabicyclo(2,2,2)octane (DABCO or triethylenediamine), 2,2′-bis-(dimethyl), which has strong gelation or foaming reaction. aminoethyl ether) (BDMAEE), and N-alkylmorpholine, substituted piperazine, and the like.

According to an embodiment of the present invention, the nonphthalate-based plasticizer is DOTP (dioctyl terephthalate), ESO (epoxidized soybean oil), DINCH (dinonylcyclohexanedicarboxylate), AMG (acetylated monoglyceride) ) may be one or more selected from the group consisting of. Their chemical structure, environment-friendly properties, and plasticity are shown in Table 1 below.

plasticizer Features rescue eco-friendliness plasticity DOP (Dioctyl
phthalate) phthalate

none Great DOTP (Dioctyl)
terephthalate) non-phthalate

Great Great ESO (Epoxidized
Soybean Oil) Eco-friendly plasticizer
stabilizator

very good bad DINCH Eco-friendly plasticizer

Great Great Acetylated (AMG)
monoglycerides) Eco-friendly plasticizer

very good Great

According to an embodiment of the present invention, the eco-friendly polyurethane composition for two-component composite waterproofing can be applied to one or more waterproof sheets selected from the group consisting of improved asphalt, synthetic rubber, modified rubber, vinyl chloride (PVC), and TOP.

According to an embodiment of the present invention, the prepolymer of the cured part has a free isocyanate content of 3 to 6% by weight, (i) a low molecular weight polypropylene glycol diol having a weight average molecular weight (Mw) of 2,000 to 3,500, and (ii) With respect to the polyol mixed with the high molecular weight polypropylene glycol triol having a weight average molecular weight (Mw) of 3,500 to 5,000, the polyisocyanate compound is added in an equivalent ratio of 1: 1.0 to 2, and the reaction is carried out at 80 ° C. The free isocyanate (%) content is It may be manufactured by carrying out until it becomes the above range.

In the present invention, the usable polyisocyanates can be particularly selected from commercially available polyisocyanates, for example, mention may be made of:

- aromatic di- or triisocyanate, preferably diphenylmethane 4,4'- or 2,4'- or 2,2'-diisocyanate (MDI) or any mixture of these isomers, tolylene 2,4- or 2,6-diisocyanate (TDI) or a mixture of any of these isomers, a mixture of MDI and MDI homologs (polymeric MDI or PMDI), phenylene 1,3- or 1,4-diisocyanate, 2,3, 5,6-tetramethyl-1,4-diisocyanatobenzene, naphthalene 1,5-diisocyanate (NDI), 3,3'-dimethyl-4,4'-diisocyanatodiphenyl (TODI), dia nicidine diisocyanate (DADI), tris(4-isocyanatophenyl)methane or tris(4-isocyanatophenyl)thiophosphate; preferably MDI or TDI;

- aliphatic, cycloaliphatic or aromatic diisocyanate or triisocyanate, preferably tetramethylene 1,4-diisocyanate, 2-methylpentamethylene 1,5-diisocyanate, hexamethylene 1,6-diisocyanate (HDI), 2 ,2,4- and/or 2,4,4-trimethylhexamethylene 1,6-diisocyanate (TMDI), decamethylene 1,10-diisocyanate, dodecamethylene 1,12-diisocyanate, lysine diisocyanate or Lysine ester diisocyanate, cyclohexane 1,3- or 1,4-diisocyanate, 1-methyl-2,4- and/or -2,6-diisocyanatocyclohexane (H6TDI), 1-isocyane Ito-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (IPDI), perhydro-2,4'- and/or -4,4'-diphenylmethane diisocyanate (H12MDI), 1 ,3- or 1,4-bis-(isocyanatomethyl)cyclohexane, m- or p-xylylene diisocyanate, tetramethylxylylene 1,3- or 1,4-diisocyanate, 1,3, 5-tris(isocyanatomethyl)benzene, bis(1-isocyanato-1-methylethyl)naphthalene, dimer or trimer fatty acid isocyanates, such as in particular 3,6-bis(9-isocya) natononyl)-4,5-di-(1-heptenyl)cyclohexene (dimeryl diisocyanate); preferably H12MDI or HDI or IPDI; and

- oligomers or derivatives of the mentioned di- or triisocyanates derived from HDI, IPDI, MDI or TDI, in particular oligomers containing uretdione or isocyanate or iminooxadiazinedione groups or various groups thereof; or di- or polyfunctional derivatives containing esters or ureas or urethanes or biurets or allophanates or carbodiimides or uretonimines or oxadiazinetrione groups or various groups thereof. In practice, polyisocyanates of this kind are typically mixtures of substances having different degrees of oligomerization and/or chemical structures. They in particular have an average NCO functionality of 2.1 to 4.0.

Particularly preferred polyisocyanates may be in the form of HDI, IPDI, H12MDI, TDI, MDI or MDI which is liquid at room temperature.

According to an embodiment of the present invention, the polyisocyanate compound is an aromatic polyisocyanate, such as toluene diisocyanate (TDI), diphenylmethane-4,4'-diisocyanate (MDI), xylene diisocyanate (XDI), isophorone. It may be at least one selected from the group consisting of diisocyanate (IPDI), polymethylene polyphenyl polyisocyanate, carbodiimide or urethane-type modified MDI, or hexamethylene diisocyanate (HDI) as an aliphatic polyisocyanate.

According to an embodiment of the present invention, the polyisocyanate compound may be toluene diisocyanate (TDI).

In the present invention, suitable solvents are in particular acetone, methyl ethyl ketone, methyl n-propyl ketone, diisobutyl ketone, methyl isobutyl ketone, methyl n-amyl ketone, methyl isoamyl ketone, acetylacetone, mesityl oxide, cyclo Hexanone, methylcyclohexanone, ethyl acetate, propyl acetate, butyl acetate, n-butyl propionate, diethyl malonate, 1-methoxy-2-propyl acetate, ethyl 3-ethoxypropionate, diiso Propyl ether, diethyl ether, dibutyl ether, diethylene glycol diethyl ether, ethylene glycol diethyl ether, ethylene glycol monopropyl ether, ethylene glycol mono-2-ethylhexyl ether, toluene, xylene, heptane, octane, naphtha , white spirit, petroleum ether or benzine, in particular the products of Solvesso (trade name) (from Exxon), and also methylene chloride, propylene carbonate, butyrolactone, N-methylpyrrolidone or N -Ethylpyrrolidone.

The eco-friendly polyurethane composition for composite waterproofing according to the present invention can be applied to a coating waterproofing method of forming a waterproofing film, but by applying it to a sheet waterproofing method using a waterproofing sheet, it is preferable for a composite waterproofing method using both coating and sheet waterproofing can be applied As a waterproof sheet that can be used in the sheet waterproofing method, improved asphalt, synthetic rubber, modified rubber, vinyl chloride (PVC), TOP, and the like may be mentioned.

Hereinafter, the present invention will be described in more detail through examples. However, the following examples are provided to explain the present invention in more detail, and the scope of the present invention is not limited by the following examples. The following examples can be appropriately modified and changed by those skilled in the art within the scope of the present invention.

Example

Preparation Example 1: Preparation of polyisocyanate prepolymer of cured part

(A) 100 parts by weight of low molecular weight polypropylene glycol diol (Mw = 2,000), 35 parts by weight of high molecular weight polypropylene glycol triol (Mw = 3,000), 5 parts by weight of 1,3-butylene glycol, as a nonphthalate plasticizer 3 parts by weight of NEO-T (manufacturer: Aekyung Petrochemical), 15 parts by weight of tolylene diisocyanate (TDI) and 5 parts by weight of xylene were mixed. In the mixture, the equivalent ratio of the isocyanate (NCO) group of the tolylene diisocyanate compound to the hydroxyl (OH) group of the polyol was approximately 1:1.2.

The resulting mixture was heated to 80° C. and reacted until the free isocyanate (%) content became 5.5±0.2%, to obtain a polyisocyanate prepolymer.

Example 1

(1) Preparation of eco-friendly polyurethane two-component composition:

(A) Preparation of the main part

238 parts by weight of low molecular weight polypropylene glycol diol (Mw = 3,000), 80 parts by weight of high molecular weight polypropylene glycol triol (Mw = 4,000), 18.5 parts by weight of DETDA aldimine (118 g/eq), NEO as a nonphthalate plasticizer -T (manufacturer: Aekyung Petrochemical) 10 parts by weight, bismuth compound (manufacturer: Jinyang Chemical Co., Ltd.) 5 parts by weight, xylene 10 parts by weight, PE-wax 6 parts by weight, antifoaming agent 1 part by weight, TiO2 parts by weight and inorganic As a filler, 619 parts by weight of calcium carbonate was mixed to obtain 997.5 parts by weight of the main part.

(B) Preparation of the hardened part

The polyisocyanate prepolymer (Free NCO 5.5 wt%) obtained in Preparation Example 1 was used as a curing part.

(2) Formation of a composite waterproofing layer using an eco-friendly polyurethane two-component composition

(Step 1) The underlying concrete support layer was cleaned and a primer was applied.

(Step 2) On the formed primer, a waterproof sheet made of glass fiber impregnated with asphalt was arranged at intervals of 5 to 10 mm.

(Step 3) The gap between the waterproof sheets was reinforced by applying the eco-friendly polyurethane two-component composition prepared in (1) above.

(Step 4) The waterproof sheet layer was formed by connecting the polyurethane reinforcing layer reinforced in the gap between the waterproof sheets and an adhesive reinforcing tape having an area that could cover both of the waterproof sheets.

(Step 5) A waterproof coating layer was formed by applying the eco-friendly polyurethane composition prepared in (1) above on the waterproof sheet layer attached and connected with an adhesive reinforcing tape.

The composite waterproof layer composed of the resulting waterproof sheet layer and waterproof coating layer was dried.

Example 2

A composite waterproofing layer was formed in the same manner as in Example 1 except that diisononyl cyclohexanedicarboxylate [Hexamoll® DINCH®, BASF AG) was used as a nonphthalate-based plasticizer.

Example 3

A composite waterproof layer was formed in the same manner as in Example 1, except that a 1:1 (by weight) mixture of a bismuth compound and a zinc compound was used as a curing accelerator.

Comparative Example 1

A composite waterproofing layer was formed in the same manner as in Example 1, except that MOCA was used instead of DETDA aldimine as a chain extender. Investigate the physical properties of the polyurethane waterproofing film in the composite waterproofing layer and list it in Table 3.

Comparative Example 2

A composite waterproofing layer was formed in the same manner as in Example 1, except that the diamine compound DETDA as a chain extender was used as it is without converting to aldimine.

Comparative Example 3

A composite waterproofing layer was formed in the same manner as in Example 1, except that an excessive amount of a plasticizer was added while the diamine compound DETDA as a chain extender was used as it is without conversion to aldimine.

Subject part input material Comparative Example 1 Comparative Example 2 Example 1 Comparative Example 3 Example 2 Example 3 polypropylene glycol diol
(Mw=3,000) 238 238 238 238 238 238 polypropylene glycol triol
(Mw=4,000) 80 80 80 80 80 80 MOCA 21 - - - - - DETDA - 13.9 - 13.9 - - DETDA Aldimine (118 g/eq) - - 18.5 - 18.5 18.5 NEO-T 10 10 10 150 - 10 Bismuth-based catalyst 5 5 5 5 10 - xyren 10 10 10 10 5 2.5 PE-wax 6 6 6 6 - 2.5 antifoam One One One One 10 10 TiO ₂ 10 10 10 10 6 6 CaCO ₃ 619 619 619 619 One One total amount 1,000 992.9 997.5 1132.9 10 10 hardener Prepolymer NCO 5.5% NCO/OH 1.2 1.2 1.2 1.2 1.2 1.2 Main cost (wt) (Subject: Hardener) 3 : 1 3 : 1 3 : 1 3 : 1 3:1 3:1

Experimental Example 1

The physical properties of the eco-friendly polyurethane waterproof coating film in the composite waterproof layer obtained in Example 1 and Comparative Examples 1 to 3 were measured as follows, and the results are summarized in Table 3 below.

(a) Tensile strength, tear strength, and elongation: KSF3211 Waterproofing film for construction

(b) gel time: at 25°C, the time when the viscosity reaches 90,000cps after mixing the main part and curing agent (fixed at Brookfield LVF #4 / 6rpm)

(c) Dissolution of plasticizer: constant temperature and humidity (temperature 25℃, humidity 90%), check the surface oil content after curing for 3 days

physical properties Comparative Example 1 Comparative Example 2 Example 1 Comparative Example 3 Example 2 Example 3 Tensile strength (N/㎟) 3.5 4.0 3.8 2.8 3.8 3.8 Tear strength (N/mm) 18.7 20.1 19.3 14.3 19.3 19.3 Elongation (%) 850 830 850 830 850 850 gel time(min) 70 15 80 70 80 80 plasticizer dissolution none none none has exist none none

As can be seen in Table 3, the polyurethane waterproof coating film (Example 1) according to the present invention has tensile strength, tear strength, and elongation equal to or greater than that of the polyurethane waterproof coating film (Comparative Example 1) using MOCA as a chain extender. and the gel time was also increased.

When a diamine compound was used as a chain extender instead of polyaldimine (Comparative Example 2), physical properties such as tensile strength, tear strength, and elongation were similar, but the gel time was shortened and workability was significantly reduced. When an excessive amount of a plasticizer was added while using a diamine compound instead of polyaldimine as a chain extender (Comparative Example 3), the gel time could be increased, but physical properties such as tensile strength, tear strength, and elongation were reduced, and the plasticizer was was eluted.

The waterproof coating film obtained in Example 2 (using a plasticizer that is eco-friendly and exhibiting increased plasticity) and Example 3 (using a mixture of a bismuth compound and a zinc compound as a curing accelerator) had physical properties such as tensile strength, tear strength, and elongation and a gel The time was similar to or increased with the waterproof coating film of Example 1.

Examples 4-9

By repeating Example 1 using the chain extender DETDA in the equivalent and content shown in Table 4, a composite waterproof layer was formed.

Subject part input material Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 polypropylene glycol diol
(Mw=3,000) 238 238 238 238 238 238 Polypropylene glycol triol (Mw=4,000) 80 80 80 80 80 80 DETDA aldimine (95 g/eq) 14.7 - - - - - DETDA aldimine (100 g/eq) - 15.5 - - - - DETDA aldimine (110 g/eq) - - 17 - - - DETDA Aldimine (120 g/eq) - - - 18.5 - - DETDA aldimine (128 g/eq) - - - - 20 - DETDA Aldimine (145 g/eq) - - - - - 22.5 NEO-T 10 10 10 10 10 10 bismuth compound 5 5 5 5 5 5 xylene 10 10 10 10 10 10 PE-wax 6 6 6 6 6 6 antifoam One One One One One One TiO ₂ 10 10 10 10 10 10 CaCO ₃ 623 623 623 623 623 623 total amount 997.7 998.5 997.7 998.5 1,003 1,005.5 hardener Prepolymer NCO 5.5% NCO/OH 1.2 1.2 1.2 1.2 1.2 1.2 Main cost (wt) (Subject: Hardener) 3 : 1 3 : 1 3 : 1 3 : 1 3 : 1 3 : 1

Experimental Example 2

The physical properties of the eco-friendly polyurethane waterproof coating film in the composite waterproofing layer obtained in Examples 4 to 7 were measured as follows, and the results are summarized in Table 5 below.

(a) Tensile strength, tear strength, and elongation: KSF3211 Waterproofing film for construction

(b) gel time: at 25°C, the time when the viscosity reaches 90,000cps after mixing the main part and curing agent (fixed brookfield LVF #4 / 6rpm)

(c) Measurement of hardness (shore A): storage in a thermo-hygrostat (temperature 20℃, humidity 60%)

physical properties Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Tensile strength (N/㎟) 4.1 3.9 3.9 3.8 3.7 3.2 Tear strength (N/mm) 21.0 19.8 19.3 19.2 19.4 17.6 Elongation (%) 810 830 840 857 863 893 Gel time (min) 25 50 70 82 95 110 Hardness
(shore A) 1 day 52 50 40 35 30 20 3 days 65 65 62 60 54 30 5 days 67 67 62 62 60 45 7 days 67 67 62 62 62 53

As can be seen in Table 5 above, when the aldimine equivalent of the polyaldimine (DETDA aldimine) used is in the range of 100 to 140 g/eq (Examples 5 to 9), the gel time increases as the aldimine equivalent increases The gel time becomes longer, and thus workability is improved, while physical properties such as hardenability, tensile strength, tear strength, elongation, and hardness tend to decrease little by little.

When the aldimine equivalent of the used polyaldimine (DETDA aldimine) does not fall within the range of 100 to 140 g/eq and is as low as 95 g/eq (Example 4), the gel time is too short as 25 minutes, so workability is not It can be seen that it is too low, and therefore difficult to apply to the polyurethane composition.

Specific examples of the composite waterproofing method including the eco-friendly polyurethane waterproofing film and the waterproofing sheet according to the present invention have been described so far, but it is obvious that various implementation modifications are possible within the limit without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the following claims as well as the claims and equivalents.

That is, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims; All changes or modifications derived from the concept of equivalents thereof should be construed as being included in the scope of the present invention.

Claims (12)

(Step 1) applying a primer to the entire base concrete surface;
(Step 2) disposing a waterproof sheet on top of the primer at intervals of 5 to 10 mm;
(Step 3) reinforcing the gap between the waterproof sheets with an eco-friendly polyurethane composition;
(Step 4) forming a waterproof sheet layer by connecting between the waterproof sheets with an adhesive reinforcing tape; and
(Step 5) forming a waterproof coating layer by applying an eco-friendly polyurethane composition on the reinforced waterproof sheet layer;
A composite waterproofing method comprising an eco-friendly polyurethane waterproofing film and a waterproofing sheet,
The eco-friendly polyurethane composition comprises (A) 20 to 40 parts by weight of a polyol having 2 to 3 functional groups, 1 to 3 parts by weight of polyaldimine as a chain extender, 1 to 3 parts by weight of a nonphthalate-based plasticizer, 0.1 to 0.4 of a dispersant A main agent containing 0.1 to 0.4 parts by weight of an antifoam, 1-3 parts by weight of a color pigment, 50 to 70% by weight of an extender as an inorganic filler, 0.4 to 1.0 parts by weight of a bismuth compound as a curing accelerator, and 0.5 to 1.5 parts by weight of a solvent part; and (B) a curing part containing 85 to 95 parts by weight of a prepolymer having a free isocyanate (Free NCO) content of 3 to 6% by weight, and 5 to 15 parts by weight of a solvent. selected,
The (A) main part and (B) hardening part are included in a weight ratio of 3 to 4:1,
The bismuth compound is at least one selected from bismuth octoate, bismuth naphthenate, bismuth propionate, bismuth maleinate, bismuth neothecanoid and bismuth neopentanoid;
The nonphthalate-based plasticizer is at least one selected from the group consisting of DOTP (dioctyl terephthalate), ESO (epoxidized soybean oil), DINCH (dinonylcyclohexanedicarboxylate), AMG (acetylated monoglyceride) characterized by,
Composite waterproofing method including eco-friendly polyurethane waterproofing film and waterproofing sheet.
The method of claim 1,
In step 2,
(Step 2-1) forming a first waterproof coating film with an eco-friendly polyurethane composition on the primer; and
(Step 2-2) disposing a waterproof sheet on the first waterproof coating film at intervals of 5 to 10 mm; characterized in that it comprises,
Composite waterproofing method including eco-friendly polyurethane waterproofing film and waterproofing sheet.
3. The method of claim 2,
In the above (step 2-1),
characterized in that the first waterproof coating is installed up to the corner where the wall and the slab meet,
Composite waterproofing method including eco-friendly polyurethane waterproofing film and waterproofing sheet.
3. The method according to claim 1 or 2,
The waterproof sheet is characterized in that the corners are arranged to be in contact without a gap or arranged so that the corners overlap,
Composite waterproofing method including eco-friendly polyurethane waterproofing film and waterproofing sheet.
The method of claim 1,
The waterproof sheet is characterized in that at least one selected from the group consisting of improved asphalt, synthetic rubber, modified rubber, vinyl chloride (PVC), and TOP,
Composite waterproofing method including eco-friendly polyurethane waterproofing film and waterproofing sheet.
The method of claim 1,
The waterproof sheet, a polyester long fiber nonwoven fabric, polypropylene woven fabric, silica sand or sand, high density polyethylene film is attached to the top
Characterized in that the long fiber nonwoven fabric, polypropylene woven fabric, silica sand or sand is attached to the lower part,
Composite waterproofing method including eco-friendly polyurethane waterproofing film and waterproofing sheet.
delete The method of claim 1,
In the subject part of (A) above,
The polyol is (i) 70 to 85% by weight of a low molecular weight polypropylene glycol diol having a weight average molecular weight (Mw) of 2,000 to 3,500 and (ii) a high molecular weight polypropylene glycol triol having a weight average molecular weight (Mw) of 3,500 to 5,000 Characterized in comprising 15 to 30% by weight,
Composite waterproofing method including eco-friendly polyurethane waterproofing film and waterproofing sheet.
The method of claim 1,
In the subject part of (A) above,
The polyaldimine is a composite waterproofing method comprising an eco-friendly polyurethane waterproofing film and a waterproofing sheet, characterized in that it is selected from the compounds of Formula 1 below:
[Formula 1]

wherein n is 2 or 3,
Z is an aryl radical substituted by an alkyl group and/or an alkoxy group and having a total of 12 to 26 carbon atoms,
A is an n-valent having a molecular weight in the range of 42 to 6,000 g/mol, optionally containing ether oxygen and/or containing a bicyclic or tricyclic ring system, bonded through at least one tertiary or quaternary carbon atom aliphatic, cycloaliphatic or aromatic hydrocarbyl radicals.
The method of claim 1,
The polyaldimine is an isomer of diethyltoluenediamine (DETDA), an isomer of diethyltoluenamine, an isomer of di-(methylthio)toluenediamine, and an isomer of di-(methylthio)toluene-diamine. Characterized in that it is derived from one or more selected aromatic diamine compounds,
Composite waterproofing method including eco-friendly polyurethane waterproofing film and waterproofing sheet.
The method of claim 1,
The polyaldimine is characterized in that it has an aldimine equivalent of 100 g / eq to 140 g / eq,
Composite waterproofing method including eco-friendly polyurethane waterproofing film and waterproofing sheet.
The method of claim 1,
In the hardening part of (B),
The prepolymer has a free isocyanate content of 3 to 6% by weight, (i) a low molecular weight polypropylene glycol diol having a weight average molecular weight (Mw) of 2,000 to 3,500, and (ii) a weight average molecular weight (Mw) having a weight average molecular weight (Mw) of 3,500 to 5,000. Prepared by adding a polyisocyanate compound in an equivalent ratio of 1:1.0 to 2 with respect to the polyol mixed with the high molecular weight polypropylene glycol triol and carrying out the reaction at 80° C. until the free isocyanate (%) content is within the above range has become,
The polyisocyanate compound is an aromatic polyisocyanate, such as toluene diisocyanate (TDI), diphenylmethane-4,4'-diisocyanate (MDI), xylene diisocyanate (XDI), isophorone diisocyanate (IPDI), polymethylene poly Characterized in that at least one selected from the group consisting of phenyl polyisocyanate, carbodiimide or urethane-type modified MDI, or aliphatic polyisocyanate, hexamethylene diisocyanate (HDI),
Composite waterproofing method including eco-friendly polyurethane waterproofing film and waterproofing sheet.