KR101753748B1 - One component type polyurethane paint composition for transparent and waterproof - Google Patents

Abstract

The present invention relates to a resin composition comprising a main resin comprising a resin obtained by mixing an alkyd resin, an acrylic resin, a melamine resin and a compound of the formula (1) in a weight ratio of 1: 3: 1 to 3: 0.5 to 2: 0.5 to 2; Polyester resin; Blocked polydiocyanate; Liquid type polyurethane coating composition for a transparent waterproofing material which can provide an excellent coating film property while easily forming a backing film on a flooring or a building material including an organic solvent.

Description

TECHNICAL FIELD [0001] The present invention relates to a one-component polyurethane paint composition for a transparent waterproofing material,

The present invention relates to a resin composition comprising a main resin comprising an alkyd resin, an acrylic resin, a melamine resin and a mixed resin of formula (1); Polyester resin; Blocked polydiocyanate; And an organic solvent. The present invention relates to a one-component polyurethane coating composition for a transparent waterproofing material.

Generally, a waterproofing work is performed to form an impermeable waterproof layer on the surface of the structure in order to prevent moisture from penetrating into the interior of the building, such as the roof, floor, underground parking lot, and joints of buildings. Depending on the area to be waterproofed and the base material, base material and waterproofing material of reinforced concrete, lightweight concrete, ALC, PC, etc., there is a slight difference in the structure and construction method. However, the general method is asphalt waterproofing method , A sheet waterproofing method, and a coating waterproofing method. Recently, a composite waterproofing method suitable for the situation such as a method of combining these and combining them together has been applied.

The asphalt waterproofing method has been used for a long time. Recently, an asphaltized asphalt sheet is used, but the problem of self-cracking of the waterproofing coating film due to the temperature difference is present. In addition, the sheet waterproofing method is a method in which a synthetic rubber or the like is formed into a sheet having a certain thickness and width and adhered to a waterproof surface at a construction site to form a waterproof layer. This method is easy to implement necessary physical properties through various laminated structures in the production of sheets, but is convenient in construction. However, it is difficult to apply to complicated areas, difficult to repair parts, difficult to achieve complete watertightness in seams between seats, There is a problem that the liver sealing work is performed manually by hand. In recent years, a great variety of methods have been proposed for the complete watertightness of the seam between seats, and considerable improvement has been made. However, when the swelling phenomenon occurs in the sheet waterproofing method, the film is broken due to repeated shrinkage and expansion due to temperature difference, There is a problem that the function is lost.

In addition, there are several methods for waterproofing the coating film depending on the kind of the material, and the urethane waterproofing method is typical. Urethane waterproofing method is to form a urethane film with a certain thickness by applying liquid urethane resin on the bottom and drying and curing it by arranging the floor to be applied, It has a merit that it can be adhered to a concrete surface relatively well and is excellent in stretchability so that waterproof performance can be maintained to some extent even against cracks. In addition, it is advantageous in that it is relatively easy to construct in a narrow place or in a complicated part, it can be seamlessly installed, and it is comparatively easy to repair, and may include various additives in order to improve physical properties of a coating film.

However, in general, there is a technical limitation in forming a back coating film having a thickness of 50 탆 or more in a conventional coating process in a roll coating process. In order to coat a urethane back coating film on a steel sheet for high-grade interior and exterior coating, There is a problem that productivity is deteriorated due to excessive consumption of energy and excessive curing at the time of repetitive painting.

In addition, this liquid type paint has to be sensitive to the pot life time due to the working conditions in which the subject and the hardening agent should be mixed at the time of use, and it is necessary to sensitize the hardening condition to room temperature drying or curing, depending on the characteristics of the polyol and urethane hardener, Heating and drying conditions, etc., so that not only a lot of working time and expenses are additionally required, but also the residual amount is difficult to be reused and the production cost is increased.

One embodiment of the present invention is to provide a one-component polyurethane coating composition for a transparent waterproofing material which can provide excellent coating film properties while easily forming a back coat on a flooring or a building material.

One embodiment of the present invention is a resin composition comprising a main resin 100 comprising a resin obtained by mixing an alkyd resin, an acrylic resin, a melamine resin, and a compound of the following formula 1 in a weight ratio of 1: 3: 1 to 3: 0.5 to 2: By weight; 50 to 100 parts by weight of a polyester resin; 5 to 30 parts by weight of blocked poly diisocyanate; And 50 to 150 parts by weight of at least one organic solvent selected from the group consisting of ester solvents, aromatic hydrocarbon solvents and mixed solvents thereof.

[Chemical Formula 1]

In the above formula, n is a natural number of 1 to 10.

The blocked polydiisocyanate may be a mixture of 70 to 98% by weight of blocked aliphatic polydiisocyanate and 2 to 30% by weight of blocked alicyclic polydiisocyanate.

The blocked polydiisocyanate is prepared by mixing a blocked aliphatic diisocyanate having a blocked hexamethylene diisocyanate trimer and a blocked alicyclic diisocyanate having a blocked isophorone diisocyanate trimer in a weight ratio of 80:20 Can be used.

The one-component polyurethane coating composition for a transparent waterproofing material may be applied on a primer layer, and the primer layer may include aminopropyltriethoxysilane.

The one-component polyurethane coating composition for a transparent waterproofing material according to one embodiment of the present invention has an effect of easily forming a back coating film having a thickness of 500 탆 or more only by coating on a flooring material or a building material.

In addition, a complete transparent film having a transmittance of 90% or more can be formed, and the effect of the structure can be realized as it is.

In addition, it is excellent in weather resistance, resistance to water and frost, and heat resistance, and provides a high water vapor permeability, so that the surface can breathe, and the life of the flooring or building material can be prolonged and safely maintained.

FIG. 1 is an image of a one-component polyurethane coating composition layer for a transparent waterproofing material formed using a one-component polyurethane coating composition for a transparent waterproofing material according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, it should be understood that the present invention is not limited thereto, and the present invention is only defined by the scope of the following claims.

One embodiment of the present invention is a resin composition comprising a main resin 100 comprising a resin obtained by mixing an alkyd resin, an acrylic resin, a melamine resin, and a compound of the following formula 1 in a weight ratio of 1: 3: 1 to 3: 0.5 to 2: By weight; 50 to 100 parts by weight of a polyester resin; 5 to 30 parts by weight of blocked poly diisocyanate; And 50 to 150 parts by weight of at least one organic solvent selected from the group consisting of ester solvents, aromatic hydrocarbon solvents and mixed solvents thereof.

[Chemical Formula 1]

In the above formula, n is a natural number of 1 to 10.

The one-component polyurethane coating composition for a transparent waterproofing material according to an embodiment of the present invention has a solid content of 50 to 80% by weight of solids, and can provide a good film property There is an effect.

In addition, the main resin having a low molecular weight in a weight-average molecular weight range of 1,000 to 10,000 can be used to easily form a back coating film having a thickness of about 1 mm by a single coating. Particularly, the main resin can be maximized by using an alkyd resin, an acrylic resin and a melamine resin mixed in a weight ratio of 2: 2: 1.

As the alkyd resin, those known in the art can be used. For example, from 25 to 50% by weight of an ester reactant, from 10 to 40% by weight of a (meth) acrylate monomer, from 10 to 20% by weight of a styrene monomer, from 2 to 10% by weight of an acrylic acid (AA) , 1 to 5% by weight of triethyloamine (TEA), and 5 to 20% by weight of butyl cellulove are mixed with each other.

10 to 40% by weight of dehydrated fatty acid (DCOFA), 10 to 30% by weight of trimethylopropane (TMP), 10 to 20% by weight of isophthalic acid (IP acid) 3 to 10% by weight of trimelletyl anhydride (TMA), and 20 to 40% by weight of buthyl cellove.

As the acrylic resin, those known in the art may be used, and examples thereof include polymethylmethacrylates and polymethylmethacrylate copolymers. Specific examples of the polymethylmethacrylate products include commercially available products of LG MMA. As the polymethylmethacrylate copolymer products, the Palloidgade (trade name) of Rohm and Haas products can be used. In particular, the thermoplastic acrylic resin preferably has a glass transition temperature (Tg) of 30 to 70 ° C and a weight average molecular weight (Mw) in the range of 30,000 to 200,000.

As the melamine resin, those known in the art may be used. For example, a methoxy type melamine resin or a methoxy type melamine resin or a methoxy / butoxy mixed type melamine resin having a molecular weight of 300 to 1,000 can be used. The methoxy melamine resin is obtained by polymerization of methanol and formaldehyde, and the butoxy melamine can be obtained by polymerization of iso-butanol or normal butanol and formaldehyde.

Specific examples of the melamine resin include CYMEL-303, CYMEL-325, CYMEL-327, CYMEL-350, CYMEL-370 (manufactured by CYTEC), RESIMINE-7550, RESIMINE-717, RESIMINE-730, RESIMINE- BE-630, and BE-692 (manufactured by BIP Co., Ltd.) as the butoxy type melamine resin, and BE-3717 and BE-3747 , RESIMINE-7512, and RESIMINE-750 (manufactured by SOLUTIA). Resinine-755, RESIMINE-757, RESIMINE-751 (manufactured by SOLUTIA Corporation), CYMEL-1168, CYMEL-1170 and CYMEL-232 (manufactured by CYTEC Co., Ltd.) and the like are examples of the butoxy / methoxy mixed resin .

The polyester resin is generally used in the art and is not particularly limited in its kind. More specifically, it is preferable to use a polyester polyol or an unsaturated polyester resin synthesized by condensation reaction of polyhydric alcohols and polybasic acids, It is preferable to use a polyester resin synthesized by adding a polyol to alcohols and polybasic acids and reacting them. Examples of the polyhydric alcohols include ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, neopentyl glycol, Diethylene glycol, triethylene glycol, dipropylene glycol, ethylene oxide adduct of bisphenol A, propylene oxide of bisphenol A, ethylene oxide adduct of bisphenol A, diethylene glycol, diethylene glycol, Unsaturated low molecular weight glycols such as adducts and alkyl glycidyl ethers of n-butyl glycidyl ether and 2-ethylhexyl glycidyl ether. The polybasic acids include adipic acid, Phthalic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid, mallein acid, fumaric acid, sebacin acid, malonic acid, pimeric acid, Sulfuric acid, azelaic acid, It is preferable to use an anhydride of a dibasic acid, of which fumaric acid, iso-fumaric acid and terephthalic acid are preferably used, and it is preferable that the polyol has two or more hydroxyl groups, and specifically, ethylene glycol, Saturated or unsaturated low molecular weight glycols such as 2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, diethylene glycol, triethylene glycol, dipropylene glycol, Molecular weight diol (molecular weight: 100 to 1,000) of alkyl glycidyl ethers such as ethylene glycol, propylene glycol, ethylene glycol, propylene glycol, ethylene glycol, propylene glycol, (Molecular weight 1,000 to 5,000) diols can be used.

The polyester resin used in the present invention is preferably one having a weight average molecular weight of 10,000 to 20,000 in consideration of adhesion with a flooring material or construction material and workability.

However, the present invention is not limited to the above-mentioned polyester resin, and any polyester resin may be used as long as it meets the object of the present invention.

The blocked polydiisocyanate may be a ketooxime derivative (diethylketooxime, methylethylketooxime, methylisobutylketooxime, etc.) capable of capping an isocyanate group of a polyisocyanate, 1,2,4-triazole, 3,5 - Polydisocyanates can be capped using dimethylpyrrazole, dimethylmalonic acid, diethylmalonic acid, lactams (such as caprolactam), phenols and secondary amines and monohydric alcohols (C1-C10). In particular, considering the workability of the coating film, it is more preferable to use a mixture of a ketooxime derivative and 1,2,4-triazole to cap polyisocyanate.

The polyisocyanate is generally used in the art, and its kind is not particularly limited. More specifically, aliphatic polyisocyanate and alicyclic polyisocyanate may be mixed to provide excellent coating film properties and waterproof properties. More specifically, the aliphatic polyisocyanate is selected from the group consisting of hexamethylene diisocyanate (HDI), 2-methylpentane diisocyanate (MPDI), norbornyl diisocyanate (NBDI) and 4-isocyanate methyl-1,8-octamethylene Diisocyanate (NTI), and the alicyclic polyisocyanate may be selected from the group consisting of isophorone diisocyanate (IPDI), 4,4-dicyclohexylmethane diisocyanate and 1,3-bis Isocyanatomethyl) cyclohexane can be used as the polyisocyanate.

In this case, the blocked polydiisocyanate may be a mixture of 70 to 98% by weight of the blocked aliphatic polydiisocyanate and 2 to 30% by weight of the blocked alicyclic polydiisocyanate.

More specifically, the blocked polydiisocyanate comprises a blocked aliphatic diisocyanate having a blocked hexamethylene diisocyanate trimer and a blocked alicyclic diisocyanate having a blocked isophorone diisocyanate trimer in a weight ratio of 80:20 Mixed ones can be used.

The organic solvent may be at least one selected from the group consisting of ester solvents, aromatic hydrocarbon solvents, and mixed solvents thereof. More specifically, the aromatic hydrocarbon-based solvent may be an aromatic naphtha (petroleum) solvent, and the ester-based solvent may include 2-methoxy- 1-methylethyl acetate) can be used. More specifically, the organic solvent can improve the workability of a coating film by using an organic solvent in which an ester solvent and an aromatic hydrocarbon solvent are mixed in a 1: 9 weight ratio.

In addition, the one-component polyurethane coating composition for a transparent waterproofing material can be applied on the primer layer, and the primer layer containing aminopropyltriethoxysilane can be used more stably on the flooring or building material It can be bonded. More specifically, the primer layer may include 70 to 98% by weight of the alcohol-based organic solvent and 2 to 30% by weight of the aminopropyltriethoxysilane.

The one-component polyurethane coating composition for a transparent waterproofing material according to one embodiment of the present invention may be applied on a flooring or a building material according to a method generally used in the art, more specifically, a spray or rollers ). ≪ / RTI >

The one-component polyurethane coating composition for a transparent waterproofing material according to one embodiment of the present invention is applied on a flooring or a building material and dried at 5 to 35 ° C for 5 to 10 hours to form a one-component polyurethane paint composition layer for a transparent waterproofing material Can be formed. An image of the one-component polyurethane coating composition layer for the transparent waterproofing material thus formed is shown in Fig.

The one-component polyurethane coating composition for a transparent waterproofing material according to one embodiment of the present invention has an effect of easily forming a coating film having a thickness of 500 탆 or more by coating only on a flooring material or a building material.

In addition, a complete transparent film having a transmittance of 90% or more can be formed, and the effect of the structure can be realized as it is.

In addition, it is excellent in weather resistance, resistance to water and frost, and heat resistance, and provides a high water vapor permeability, so that the surface can breathe, and the life of the flooring or building material can be prolonged and safely maintained.

Accordingly, the one-component polyurethane coating composition for a transparent waterproofing material according to an embodiment of the present invention can be used for protecting transparent plastic, wood, ceramic, glass, glass block wall, natural stone, concrete flooring or building material such as polyacryl, polycarbonate and the like And the transparent waterproofing is enabled.

Hereinafter, preferred embodiments and comparative examples of the present invention will be described. However, the following examples are only illustrative of the present invention and are not intended to limit the scope of the present invention.

Manufacturing example  1: Preparation of alkyd resin

, 25 wt% of dehydrated fatty acid (DCOFA), 20 wt% of trimethylopropane (TMP), 17 wt% of isophthalic acid (IP acid), trimelletie anhydride ) And 33 wt% of buthyl cellove were added to prepare an ester reactant.

10 wt% of methy methacrylate (MMA), 10 wt% of n-buthyl methacrylate (n-BMA), 10 wt% of butylacrylate monomer , 10% by weight of styrene monomer (SM), 4% by weight of acrylic acid (AA), 3% by weight of triethyloamine (TEA) and 13% by weight of buthylcellove % Were mixed to prepare a water-soluble alkyd resin.

Manufacturing example  2: Preparation of the compound represented by the formula (1)

In a three-necked reactor, Kopex-PEG-400 (concentrate) 112.6 g and dibutyltinlaurate 0.1 g were added to a heating device connected to a mechanical stirrer, a temperature sensor and a temperature sensor and stirred at room temperature. , 64.9 g of hexamethylene diisocyanate (HMDI), 322.1 g of pentaerythritol triacrylate (CAS Number 3524-68-3, manufactured by Sigma-Aldrich) and 0.2 g of methoxyhydroquinone were charged and maintained at a reaction temperature of 75 to obtain 3 Lt; / RTI > It was judged that the reaction was completed when the characteristic peak of isocyanate of 2260 cm -1 in the infrared spectrum completely disappeared. After completion of the reaction, 224 g of 3-trimethoxysilylpropyl glycidyl ether was added, and the reaction between the epoxy group of 3-trimethoxysilylpropyl glycidyl ether and the amine group contained in the urethane structure was carried out with stirring for 1 hour To proceed the desired compound.

Example  One: One-pack type  Preparation of polyurethane coating composition

CYMEL-232 (manufactured by CYTEC) as a melamine resin and the resin of Production Example 2 were mixed in a ratio of 2: 2: 1 : 1, based on 100 parts by weight of the mixed resin;

Step 2) 70 parts by weight of a polyester resin; 20 parts by weight of a blocked polyisocyanate mixed with a blocked aliphatic diisocyanate having blocked hexamethylene diisocyanate trimer and a blocked alicyclic diisocyanate having blocked isophorone diisocyanate trimer in a weight ratio of 80:20 ; And 100 parts by weight of a mixed organic solvent of an ester solvent and an aromatic hydrocarbon solvent were mixed to prepare a one-component polyurethane coating composition for a transparent waterproofing material. The blocking of the polydiisocyanate was carried out by using a mixture of a ketooxime derivative and 1,2,4-triazole and capping the polyisocyanate.

Test Example

The one-component polyurethane coating composition for transparent waterproofing material prepared in Example 1 was roller-coated on a glass plate which was washed with water and dried. The properties of the coating film evaluated by naturally drying at room temperature for 8 hours are shown in Table 1 below. At this time, it was confirmed that the formed coating film had a thickness of about 800 μm. It was also confirmed that the transparency of the coated film was 98%.

Exam contents result Test Methods Elongation at break 322% DIN EN ISO 527 The tensile strength 25.4 N / mm 2 DIN EN ISO 527 Tear resistance 56.9 N / mm DIN ISO 34, Method Β Accelerated aging after 2000h gloss retention
(DIN EN ISO 4892-3, 400 MJ / m2) good DIN 67530 Accelerated aging 2000h after surface aggravation
(DIN EN ISO 4892-3, 400 MJ / m2) No backache was observed. DIN EN ISO 4628-6 Hardness (SHORE D Scale) 25 ASTM D 2240 Water vapor permeability 8.05 gr / m2 .24 hours EN ISO 12572 Hydraulic Resistance No leakage
(1m water column, 24h) DIN EN 1928 Attached to absorbent ceramic tile > 2.0 N / mm 2
(ceramic tile failure) ASTM D 903 (ELCOMETER)

As can be seen from Table 1, the coating film using the one-component polyurethane coating composition for a transparent waterproofing material according to the present invention is excellent in weatherability, resistance to water and frost, and heat resistance, The surface can breathe, which has the effect of extending the life of the flooring or construction material and keeping it safe.

Accordingly, the one-component polyurethane coating composition for a transparent waterproofing material according to one embodiment of the present invention has the effect of protecting a flooring material or a building material of various materials from being transparent and waterproof.

Claims (4)

To 100 parts by weight of a main resin comprising a resin obtained by mixing an alkyd resin, an acrylic resin, a melamine resin, and a compound of the following formula (1) in a weight ratio of 1: 3: 1 to 3: 0.5 to 2: 0.5 to 2;
50 to 100 parts by weight of a polyester resin;
5 to 30 parts by weight of blocked poly diisocyanate; And
50 to 150 parts by weight of at least one organic solvent selected from the group consisting of ester solvents, aromatic hydrocarbon solvents and mixed solvents thereof;
The main resin has a weight average molecular weight ranging from 1,000 to 10,000,
Wherein a coating film having a thickness of 500 占 퐉 or more can be formed in a single coating step.
[Chemical Formula 1]

In the above formula, n is a natural number of 1 to 10.
The method according to claim 1,
The blocked polydiisocyanate may be
70 to 98% by weight of blocked aliphatic polydiisocyanate and
And 2 to 30% by weight of a blocked alicyclic polydiisocyanate are mixed.
The method according to claim 1,
The blocked polydiisocyanate may be
Characterized in that a blocked aliphatic diisocyanate having a blocked hexamethylene diisocyanate trimer and a blocked alicyclic diisocyanate having a blocked isophorone diisocyanate trimer are mixed in a weight ratio of 80:20 One-component polyurethane coating composition.
The method according to claim 1,
The one-component polyurethane coating composition for a transparent waterproofing material is applied on a primer layer,
Wherein the primer layer comprises aminopropyltriethoxysilane. ≪ RTI ID = 0.0 > 11. < / RTI >

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