KR101791653B1 - Epoxy Primer for Preventing Pin Hole - Google Patents
Epoxy Primer for Preventing Pin Hole Download PDFInfo
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- KR101791653B1 KR101791653B1 KR1020150109928A KR20150109928A KR101791653B1 KR 101791653 B1 KR101791653 B1 KR 101791653B1 KR 1020150109928 A KR1020150109928 A KR 1020150109928A KR 20150109928 A KR20150109928 A KR 20150109928A KR 101791653 B1 KR101791653 B1 KR 101791653B1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/4853—Epoxides
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/042—Magnesium silicates, e.g. talc, sepiolite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The present invention provides an epoxy primer for preventing pinholes, which is prevented from pinholes and has improved crack resistance, creasing resistance, aging resistance, oxidation resistance and impact resistance.
The epoxy primer for pinhole prevention comprises 10 to 30 parts by weight of an epoxy resin, 15 to 30 parts by weight of a styrene resin, 50 parts by weight of nonylphenol ethoxylate and sodium lauryl sulfate (C 12 H 25 NaO 4 S) mixture of 0.5 to 1.5 parts by weight, as an antioxidant and ammonium sulfate (ammonium persulfate, (NH 4) 2 S 2 O 8) 0.2 ~ 0.5 parts by weight of sodium bisulfite (sodiumbisulfite, NaHSO 3) 0.2 ~ 0.4 parts by weight , 10 to 20 parts by weight of an anti-settling agent / color pigment additive; 40 to 60 parts by weight of cement, 15 to 30 parts by weight of silica powder, 2 to 10 parts by weight of methylene chloride and 2 to 5 parts by weight of inorganic filler; And a pinhole inhibitor consisting of calcium carbonate or talc having a size of 3 to 5 mu m. The pinhole preventing agent is added to the basic epoxy primer in which the first mixture and the second mixture are mixed in a weight ratio of 1: 1 in a weight ratio of 0.2 to 0.4 Stirred and mixed.
Description
More particularly, the present invention relates to an epoxy primer for preventing pinholes from occurring in waterproof coating of a coating film and having improved crack resistance, resistance to aging, aging resistance, oxidation resistance and impact resistance.
Generally, there are waterproofing methods using epoxy resin and waterproofing method using polyurethane. However, since the waterproofing method using urea has the property of elasticity of urea itself, that is, elastomer, It is widely used because it has elasticity and strong chemical resistance.
In addition, polyurea resin has a characteristic of being able to be used in only one minute after spraying because the curing speed is fast and to form a solid film which can be walked thereon. In addition, unlike general polyurethane or epoxy resin, since it has hydrophobic property with low affinity with water, it is possible to spray directly on the surface with moisture or on a low temperature surface, The range is gradually increasing.
According to the polyurea waterproofing method disclosed in Japanese Patent No. 10-0408010 as a conventional example, unlike a general waterproofing method, a nonwoven fabric or a plastic cone is installed and then a polyurea is sprayed thereon, A polyurea waterproofing method that effectively prevents the leakage of contaminated water by forming a seamless waterproof membrane without seams and injects the polyurea at the construction site into a base member that can shorten the air shortage and reduce maintenance cost and maintenance cost A reinforcing member fastening step of fastening the non-woven fabric, which is a reinforcing member, to the base member and fastening the non-woven fabric to the base member using a nail and a washer; A polyurea spray coating step of spraying polyurea onto the reinforcing member on which the nonwoven fabric is fixed; and a polyurea drying step of naturally drying the spray-coated polyurea at room temperature for 20 to 30 seconds to fix the polyurea, An amine-terminated resin, an amine-terminated resin, an amine ring extender, and an MDI prepolymer.
According to another conventional waterproofing method disclosed in Japanese Patent No. 10324364 and a waterproofing method using the waterproofing sheet, a waterproofing method using a waterproof sheet made of polyurea and a waterproof sheet thereof, A polyurea waterproof sheet made of a flat plate portion of a rectangular or square shape and a polyurea and having a protruding portion protruding from the inside by a predetermined width of the flat plate portion and a waterproofing method using the same, The use of polyurea, which is a costly raw material, can be significantly reduced compared to the application, and the polyurea waterproof sheet can be produced and supplied as a product with uniform quality at the factory. .
As another conventional example, according to the cross-face waterproofing method of Patent No. 10-0649988, in the waterproofing treatment method for improving the durability of the concrete or reinforcing steel structure bridge, epoxy primer is applied to the face of the concrete or reinforcing steel structure, Urea is applied, a primer for adhesion enhancement containing a silane-based adhesion-imparting agent is applied to the urethane-based primer, and then a base adjusting agent mixed with an inorganic filler is applied to the epoxy resin. The waterproof treatment method is disclosed to enhance the adhesion performance between waterproofing agents to impart excellent water resistance and durability to concrete or reinforcing steel structure bridges.
As another conventional example, according to the polyurea waterproof coating method for a concrete structure of Patent Publication No. 10-0956489, a first step of surface treating a bottom layer of a concrete structure; A second step of forming a primer layer on the entire bottom layer surface-treated from the first step; A third step of applying a coating layer as a substrate adjusting material on the primer layer formed in the second step; And a fourth step of forming a coating layer by spraying a coating material containing the ultra-fast curing type polyurea resin on the coating layer formed in the third step; Wherein the coating layer of the third step is composed of a three-component type of desk adjusting agent, wherein the three-component type of desk adjusting agent contains two epoxy groups in the molecule, and the non-ionic emulsifying agent is added to the epoxy A water-soluble compound obtained by a reaction between a polyalkyl oxide compound and an amine having at least one amine group as a curing agent, the emulsion resin being used as a curing agent, the powder being contained in an amount of 20 to 40 wt% 20 to 40 parts by weight of cement, and 1 to 5 parts by weight of other additives (such as a precipitation inhibitor); Wherein the coating layer of the fourth step comprises an ultra fast curing type polyurea resin in the form of a coating composition and the polyurea resin is composed of a two-component coating material having an isocyanate prepolymer as a component A and a curing agent as a polyamine mixture as a component B ; The thickness of the two-component coating layer is in the range of 1.5 to 2.0 mm, the hardness is measured by a Shore A hardness tester to be 85 or more, the tensile strength is 200 ± 30 kgf / cm 2, the tear strength is 100 ± 15 kgf / Is characterized in that it has a characteristic of 300% or more. The polyurea waterproof coating method for a concrete structure is disclosed.
On the other hand, as a recent example which has been disclosed recently, according to the polyurea waterproof coating method using the primer of rapid speed in Patent Registration No. 10-1174106, as a method of waterproof coating the surface of a concrete structure using polyurea, A high pressure washing and a sanding treatment to treat the water content to less than 8%; A second step of forming a primer layer on the concrete bottom layer surface-treated in the first step; And a third step of spraying a polyurea resin onto the primer layer formed in the second step to form a waterproof coating layer. In the polyurea waterproof coating method using the primer having a fast speed, the primer applied in the second step is 10 to 30 parts by weight of an acrylic resin, 15 to 30 parts by weight of a styrene resin, 0.5 to 1.5 parts by weight of a nonylphenol ethoxylate and sodium lauryl sulfate mixture as a surfactant, 0.2 to 0.5 parts by weight of ammonium persulfate as an antioxidant, 0.2 to 0.4 parts by weight of sodium hydrogen, 10 to 20 parts by weight of an additive including a precipitation inhibitor and a color pigment, and the remainder being ion-exchanged water; 40 to 60 parts by weight of cement, 15 to 30 parts by weight of silica powder, 2 to 10 parts by weight of methylene chloride, and the balance of an auxiliary filler consisting of an inorganic filler is mixed in a ratio of 1: 1, and the polyurea resin Is sprayed with a spraying pressure of 150 to 200 kg / cm 2 at a temperature of 70 to 80 ° C.
However, although polyurea resin is widely used in the concrete waterproof coatings, there is a great difference in the properties of the coated surface or the waterproof surface depending on the physical properties of the primer applied to the concrete before the coating of the polyurea resin. Particularly, As the pinholes are generated, holes or recesses are formed in the subsequent application of concrete pouring or waterproofing, resulting in deterioration of product quality and reliability.
Cracks may be generated depending on the state of the construction site due to the occurrence of pinholes, and there is a problem in that it can be frozen during construction in winter.
In addition, there is a problem that aging and oxidation can proceed relatively quickly after the application.
Furthermore, the conventional coating method using the primer and the primer thereof has a problem that crack resistance, resistance to aging, aging resistance and oxidation resistance are deteriorated.
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an epoxy resin for preventing pinholes, which can completely prevent pinholes in waterproofing of coating films and improve crack resistance, resistance to aging, Primer.
The present invention provides an epoxy primer for preventing pinholes comprising 10 to 30 parts by weight of an epoxy resin, 15 to 30 parts by weight of a styrene resin, nonylphenol ethoxylate and sodium lauryl sulfate (C) as a surfactant, 12 H 25 NaO 4 S) mixture of 0.5 to 1.5 parts by weight, as an antioxidant and ammonium sulfate (ammonium persulfate, (NH 4) 2 S 2 O 8) 0.2 ~ 0.5 parts by weight of sodium bisulfite (sodiumbisulfite, NaHSO 3) 0.2 To 0.4 part by weight, and 10 to 20 parts by weight of an anti-settling agent / color pigment additive; 40 to 60 parts by weight of cement, 15 to 30 parts by weight of silica powder, 2 to 10 parts by weight of methylene chloride and 2 to 5 parts by weight of inorganic filler; And a pinhole inhibitor consisting of calcium carbonate or talc having a size of 3 to 5 占 퐉. The basic epoxy primer prepared by mixing the first mixture and the second mixture in a weight ratio of 1: 1 is mixed with stirring and mixing at a weight ratio of 0.2 to 0.4 The epoxy primer for preventing pinholes can be obtained by the following method.
According to one aspect of the present invention, there is provided an acrylic emulsion comprising 40 to 60 parts by weight of an acrylic emulsion, 50 to 70 parts by weight of a filler, 0.1 to 2 parts by weight of a thickener, 0.1 to 0.5 parts by weight of a thickening aid, 0.01 to 0.2 parts by weight of a pH adjusting agent, ~ 1 part by weight, a plasticizer in an amount of 0.01 ~ 0.5 part by weight, and a flow resistance material; 20 to 50 parts by weight of acetic acid salt, 10 to 25 parts by weight of propylcellosolve, 5 to 20 parts by weight of potassium phosphate and 2 to 10 parts by weight of modified naphthalene condensate; 40 to 50 parts by weight of a lithium phosphoric acid based low melting point complex oxide, 10 to 20 parts by weight of an organic thickener, and 30 to 40 parts by weight of an inorganic binder; And a fourth reactant comprising at least one of a phenol derivative, an aromatic amine derivative, an amine-ketone condensate, a benzimidazole derivative, a dithiocarbamic acid derivative, and a thiourea derivative.
According to another feature of the present invention, the first reactant: the second reactant: the third reactant: the fourth reactant is mixed in a weight ratio of 0.4-0.6: 0.3-0.4: 0.15-0.25: 0.12-0.08.
According to another aspect of the present invention, the method further comprises a fifth reactant selected from one or combinations of TPU (Thermoplastic Polyurethane), TPR (Thermo Plastic Rubber), PEBAX (Polyether-block-amide) The fifth reactant is mixed in a weight ratio of 0.1 to 0.06.
According to the epoxy primer for preventing pinholes according to the present invention, pinholes can be completely prevented by a pinhole preventing agent. After coating with a primer, waterproofing, anticorrosion, stain resistance and flame retardancy, as well as resistance to cracking, And the oxidation resistance and the oxidation resistance are markedly improved.
Hereinafter, the epoxy primer for preventing pinholes according to the present invention will be described in detail.
The epoxy primer for preventing pinholes according to the present invention comprises a first mixture containing epoxy as a main component. The first mixture contains 10 to 30 parts by weight of an epoxy resin, 15 to 30 parts by weight of a styrene resin, nonylphenol ethoxylate and sodium lauryl sulfate as a surfactant, C 12 H 25 NaO 4 S 0.2 to 0.5 part by weight of ammonium persulfate (NH 4 ) 2 S 2 O 8 ) as an antioxidant and 0.2 to 0.4 part by weight of sodium bisulfite (NaHSO 3 ) And 10 to 20 parts by weight of an antioxidant / color pigment additive.
The epoxy primer for preventing pinholes according to the present invention comprises a second mixture. The second mixture comprises 40 to 60 parts by weight of cement, 15 to 30 parts by weight of silica powder, 2 to 10 parts by weight of methylene chloride and 2 to 5 parts by weight of inorganic filler.
The epoxy primer for preventing pinholes according to the present invention is preferably prepared by mixing the first mixture and the second mixture at a ratio of 1: 1 to prepare a basic anti-pinhole epoxy primer. That is, the first mixture and the second mixture are put into a stirrer at a weight ratio of 1: 1, and then uniformly stirred and mixed at a stirring speed of 1,000 to 1,500 rpm for about 5 to 10 minutes to prepare a basic epoxy primer.
In particular, according to the main features of the present invention, it is preferable to include a pinhole preventing agent for preventing pinholes after construction. It is preferable that the pinhole preventing agent is formed by calcium carbonate or talc, or formed by bonding thereof.
It is preferable that the pinhole preventing agent is formed in a fine powder shape having a size of 3 to 5 mu m. When the size is less than 3 mu m, the pinhole prevention property may be deteriorated, while when it is more than 5 mu m, the mixing property and the surface property may be deteriorated. Therefore, the most preferable size is 4 탆.
On the other hand, it is preferable that the pinhole inhibitor is mixed at a weight ratio of 0.2 to 0.4 based on the basic epoxy primer formed by mixing the first mixture and the second mixture. If the weight ratio exceeds 0.4, the pinhole-preventing property may be improved but the mixing property may be deteriorated. If the weight ratio is less than 0.2, the pinhole-preventing property may be lowered. Therefore, the weight ratio thereof is most preferably 0.3.
In particular, according to one aspect of the present invention, it is preferable to further include a first reactant to prevent cracking after application or application of the primer.
The first reactant comprises an acrylic emulsion, a filler, a thickener, a thickening aid, a pH adjusting agent, a crosslinking accelerator, a plasticizer and a flow resistant material.
Here, the acrylic emulsion is preferably a copolymer selected from one or more of hydroxyethyl acrylate, hydroxyethyl methacrylate, ethyl hexaacrylate, butyl acrylate and butyl methacrylate. The content of the acrylic emulsion is 40 to 60 parts by weight. If the content of the acrylic emulsion is less than 40 parts by weight, the adhesive strength may be lowered and the water resistance and alkali resistance may be lowered. On the other hand, when the amount of the acrylic emulsion is more than 60 parts by weight,
The filler is used in an amount of 50 to 70 parts by weight, and calcium carbonate salt, calcium carbonate salt, barium sulfate, bentonite, silica or any combination thereof may be used. If the content of the filler is less than 50 parts by weight, the curing time may be delayed. If the content of the filler exceeds 70 parts by weight, the viscosity may be increased and the workability may be lowered.
The thickener may be selected from a cellulosic ester-based material in order to increase the viscosity of the acrylic emulsion to improve flow resistance and to prevent peeling, and the content thereof is 0.1 to 2 parts by weight. If the content is less than 0.1 parts by weight, sufficient viscosity increase can not be provided. If the content is more than 2 parts by weight, workability may be lowered due to high viscosity of the crack repairing agent.
The above-mentioned thickening assistant serves to further improve the function of the thickener, and methylcellulose is preferable. Its content is 0.1 to 0.5 parts by weight. If the content is less than 0.1 parts by weight, the moisturizing effect and the lubricating property may be deteriorated. If the content is more than 0.5 parts by weight, workability may be deteriorated due to high viscosity, and the curing time may be delayed due to a delay in water evaporation rate.
The pH adjusting agent is contained in an amount of 0.01 to 0.2 parts by weight for improving storage stability and compatibility and dispersion effect.
The crosslinking accelerator may be selected from a polyphosphate or glycol acetate system capable of promoting the rapid crosslinking of acrylic particles. Its content is preferably 0.1 to 1 part by weight.
As the plasticizer, polypropylene glycol is preferable, and its content is preferably 0.01 to 0.5 parts by weight. If the content is less than 0.01 part by weight, the plasticity may be deteriorated. If the content is more than 0.5 part by weight, the tensile strength may be lowered and the elongation percentage may be lowered.
Optionally, the flow-resistant material is preferably methoxypropyl acetate, and may be used in small amounts if desired. If the addition amount is too small, the flow resistance is deteriorated. If the addition amount is too large, the curing time delay and the adhesive strength may be lowered.
The first reactant is preferably mixed at a weight ratio of 0.6 to 0.4 with respect to the basic epoxy primer formed by mixing the first mixture and the second mixture. If the weight ratio exceeds 0.6, the anti-cracking property may be improved but the mixing property may be deteriorated. If the weight ratio is less than 0.4, the cracking resistance may be lowered. Therefore, the weight ratio is most preferably 0.5.
According to another aspect of the present invention, it is preferable to further include a second reactant to prevent freezing during the winter season. The second reactant comprises 20 to 50 parts by weight of acetic acid salt, 10 to 25 parts by weight of propylcellosolve, 5 to 20 parts by weight of potassium phosphate and 2 to 10 parts by weight of modified naphthalene condensate.
The acetic acid salt enhances the initial strength of the epoxy primer and lowers the freezing temperature. If the content is less than 20 parts by weight, the initial hydration reaction can not be sufficiently exhibited, resulting in freezing. If the amount exceeds 50 parts by weight, the cryoprotectant for admixture becomes a supersaturated solution, and particles of acetic acid salt may remain.
The above-mentioned profile cellosolve has a lubrication property which improves workability by providing freezing property by a freezing point lowering action. If the amount is less than 10 parts by weight, sufficient immobility and lubrication characteristics can not be expected. If the amount is more than 25 parts by weight, the hydration reaction is disturbed, and curing hardening can not be sufficiently provided.
The potassium phosphate has a function of rapidly accelerating the dissolution and increasing the initial reaction heat to accelerate the curing hardening, thereby securing the initial strength. If the amount is less than 5 parts by weight, the hydrolysis rate may be lowered and the strength may be lowered and the corrosion resistance may be lowered. If the amount is more than 20 parts by weight, cracking due to shrinkage may be caused due to the rubbing performance.
Modified naphthalene condensates can prevent cracking and improve durability. If the amount is less than 2 parts by weight, the anti-cracking property may be deteriorated. If the amount is more than 10 parts by weight, the coagulation time may be delayed.
The second reactant is preferably mixed at a weight ratio of 0.3 to 0.4 based on the basic epoxy primer formed by mixing the first mixture and the second mixture. If the weight ratio exceeds 0.4, the anti-freezing property may be improved while the bonding property may be deteriorated. If the weight ratio is less than 0.3, the anti-freezing property may be deteriorated. Therefore, the weight ratio thereof is most preferably 0.35.
According to another aspect of the present invention, it is preferable to include a third reactant for inhibiting or preventing the oxidation of the coating agent of the epoxy primer after application to prolong the lifetime. The third reactant is composed of 40 to 50 parts by weight of a lithium phosphoric acid-based low melting point complex oxide, 10 to 20 parts by weight of an organic thickener, and 30 to 40 parts by weight of an inorganic binder.
Here, the lithium phosphoric acid-based low melting point complex oxide is a composite oxide containing lithium oxide and phosphorus oxide. If the amount is less than 40 parts by weight, the composition tends to become insufficient in meltability, so that it is difficult to form a uniform epoxy primer layer and the oxidation resistance effect may deteriorate. If the amount is more than 50 parts by weight, formation of an epoxy primer layer is difficult The oxidation resistance may also be lowered.
The organic thickener is added to improve coatability, and is composed of carboxymethylcellulose (CMC) and methylcellulose (MC). If the amount is less than 10 parts by weight, the adhesion of the slurry may be insufficient. If the amount exceeds 20 parts by weight, volatile matter may be increased to increase the amount of air remaining, and the antioxidant effect may be deteriorated.
The inorganic binder is composed of silica sol and alumina sol for improving workability and hot adhesion. When the amount is less than 30 parts by weight, the workability and the hot adhesion may be deteriorated. If the amount is more than 40 parts by weight, the fluidity of the slurry may be deteriorated and the formation of the oxidation preventing film may be deteriorated.
And the third reactant is mixed at a weight ratio of 0.15 to 0.25 with respect to the basic epoxy primer formed by mixing the first mixture and the second mixture. If the weight ratio is more than 0.25, the antioxidant property can be improved but the fluidity can be increased. If the weight ratio is less than 0.15, the antioxidant property can be lowered. Therefore, the weight ratio thereof is most preferably 0.2.
According to another aspect of the present invention, it is preferable to include a fourth reactant for preventing the aging of the epoxy primer after the application of the epoxy primer to extend the functionality and the lifetime of the epoxy primer.
The fourth reactant preferably comprises at least one of a phenol derivative, an aromatic amine derivative, an amine-ketone condensate, a benzimidazole derivative, a dithiocarbamic acid derivative, and a thiourea derivative.
In terms of content, the fourth reactant is preferably mixed at a weight ratio of 0.12 to 0.08 with respect to the basic epoxy primer formed by mixing the first mixture and the second mixture. If the weight ratio exceeds 0.12, the anti-aging property is improved, but the mixing property may be deteriorated. If the weight ratio is less than 0.08, the lifetime may be lowered. Therefore, the weight ratio is most preferably 0.1.
Meanwhile, the epoxy primer for preventing pinholes according to the present invention may selectively contain a fifth reactant so as to be protected from external impacts.
The fifth reactant is preferably selected from TPU (Thermoplastic Polyurethane), TPR (Thermo Plastic Rubber), PEBAX (Polyether-block-amide), or a combination thereof, which provides excellent rigidity and repulsive elasticity.
In the content, the fifth reactant is preferably mixed in a weight ratio of 0.1 to 0.06 based on the basic epoxy primer formed by mixing the first mixture and the second mixture. When the weight ratio exceeds 0.1, the impact resistance is improved but the bonding property may be lowered. If the weight ratio is less than 0.06, the elasticity may be lowered.
Specific examples of the epoxy primer for preventing pinholes according to the present invention are as follows.
Example 1
20 parts by weight of an epoxy resin, 20 parts by weight of a styrene resin, 1 part by weight of a mixture of nonylphenol ethoxylate and sodium lauryl sulfate, 0.4 part by weight of ammonium persulfate and 0.3 part by weight of sodium hydrogen sulfite, Were mixed to prepare a first mixture.
Then, 50 parts by weight of cement, 23 parts by weight of silica sand powder, 6 parts by weight of methylene chloride and 3.5 parts by weight of an inorganic filler were mixed to prepare a second mixture.
Also, the first mixture and the second mixture were put into a stirrer at a weight ratio of 1: 1, and then stirred uniformly at a stirring speed of 1,400 RPM for about 10 minutes to prepare a basic epoxy primer.
Further, calcium carbonate and talc as fine pinhole preventive agents were prepared by treating fine powder of 4 mu m. .
Finally, the base epoxy primer thus prepared and the pinhole inhibitor were mixed at a ratio of 1: 0.3 to prepare a test piece, and the physical properties thereof were measured.
Example 2
20 parts by weight of an epoxy resin, 20 parts by weight of a styrene resin, 1 part by weight of a mixture of nonylphenol ethoxylate and sodium lauryl sulfate, 0.4 part by weight of ammonium persulfate and 0.3 part by weight of sodium hydrogen sulfite, Were mixed to prepare a first mixture.
Then, 50 parts by weight of cement, 23 parts by weight of silica sand powder, 6 parts by weight of methylene chloride and 3.5 parts by weight of an inorganic filler were mixed to prepare a second mixture.
Also, the first mixture and the second mixture were put into a stirrer at a weight ratio of 1: 1, and then stirred uniformly at a stirring speed of 1,400 RPM for about 10 minutes to prepare a basic epoxy primer.
Further, calcium carbonate and talc as fine pinhole preventive agents were prepared by treating fine powder of 4 mu m.
Subsequently, 50 parts by weight of the acrylic emulsion was mixed with 60 parts by weight of a filler, and then 1 part by weight of a thickener, 0.3 part by weight of a thickening aid, 0.1 part by weight of a pH adjuster, 0.5 part by weight of a crosslinking accelerator, 0.25 part by weight of a plasticizer, And the mixture was stirred in a stirrer for 3 hours to prepare a first reaction product.
To 50 parts by weight of distilled water, 35 parts by weight of acetic acid salt, 17 parts by weight of propylcellosolve, 13 parts by weight of potassium phosphate and 7 parts by weight of modified naphthalene condensate were added to a stirrer and stirred for 2 hours to prepare a second reactant .
45 parts by weight of a lithium phosphoric acid-based low melting point complex oxide, 15 parts by weight of an organic thickener and 35 parts by weight of an inorganic binder were added to a stirrer and stirred for 2 hours to prepare a third reactant.
Further, a phenol derivative and an aromatic amine derivative were mixed at a ratio of 1: 1 to prepare a fourth reaction product.
TPU and PEBAX were mixed at a ratio of 1: 1 to prepare a fifth reaction product.
Finally, the base epoxy primer thus prepared: pinhole inhibitor: first reactant: second reactant: third reactant: fourth reactant: fifth reactant was mixed at a ratio of 1: 0.3: 0.5: 0.35: 0.23: 0.1: 0.08 To prepare a test piece, and the physical properties thereof were measured.
Example 3
25 parts by weight of an epoxy resin, 25 parts by weight of a styrene resin, 1 part by weight of a mixture of nonylphenol ethoxylate and sodium lauryl sulfate, 0.4 part by weight of ammonium persulfate and 0.3 part by weight of sodium hydrogen sulfite, 18 parts by weight of a colorant- To prepare a first mixture.
55 parts by weight of cement, 28 parts by weight of silica sand powder, 8 parts by weight of methylene chloride and 4 parts by weight of inorganic filler were mixed to prepare a second mixture.
Also, the first mixture and the second mixture were put into a stirrer at a weight ratio of 1: 1, and then stirred uniformly at a stirring speed of 1,400 RPM for about 10 minutes to prepare a basic epoxy primer.
Further, calcium carbonate and talc as fine pinhole preventive agents were prepared by treating fine powder of 4 mu m.
After mixing 60 parts by weight of the filler with 50 parts by weight of the acrylic emulsion, 1 part by weight of a thickener, 0.3 part by weight of a thickening aid, 0.1 part by weight of a pH adjuster, 0.5 part by weight of a crosslinking accelerator, 0.25 part by weight of a plasticizer and 0.2 part by weight of a flow- And the mixture was stirred in a stirrer for 3 hours to prepare a first reaction product.
To 50 parts by weight of distilled water, 35 parts by weight of acetic acid salt, 17 parts by weight of propylcellosolve, 13 parts by weight of potassium phosphate and 7 parts by weight of modified naphthalene condensate were added to a stirrer and stirred for 2 hours to prepare a second reactant .
45 parts by weight of a lithium phosphoric acid-based low melting point complex oxide, 15 parts by weight of an organic thickener and 35 parts by weight of an inorganic binder were added to a stirrer and stirred for 2 hours to prepare a third reactant.
Further, a phenol derivative and an aromatic amine derivative were mixed at a ratio of 1: 1 to prepare a fourth reaction product.
TPU and PEBAX were mixed at a ratio of 1: 1 to prepare a fifth reaction product.
Finally, the basic epoxy primer thus prepared: pinhole inhibitor: first reactant: second reactant: third reactant: fourth reactant: fifth reactant was mixed in a ratio of 1: 0.3: 0.5: 0.35: 0.23: 0.1: 0.08, and the physical properties of the test pieces were measured.
Comparative Example 1
20 parts by weight of an acrylic resin, 25 parts by weight of a styrene resin, 1 part by weight of a surfactant, 0.4 part by weight of an antioxidant and 0.3 part by weight of sodium hydrogen sulfite, 15 parts by weight of a precipitation inhibitor and a color pigment additive, ; An acrylic primer was prepared by mixing 1: 1 of an auxiliary agent mixture composed of 50 parts by weight of cement, 25 parts by weight of silica sand powder, 7 parts by weight of methylene chloride and an inorganic filler.
Comparative Example 2
25 parts by weight of an acrylic resin, 4 parts by weight of a styrene resin 20, 1 part by weight of a surfactant, 0.4 part by weight of an antioxidant and 0.3 part by weight of sodium hydrogen sulfite, 15 parts by weight of a precipitation inhibitor and a color pigment additive, and; 45 parts by weight of cement, 20 parts by weight of silica sand powder, 7 parts by weight of methylene chloride and an inorganic filler were mixed at a ratio of 1: 1 to prepare an acrylic primer.
In order to evaluate the performance of the epoxy primer according to each of the above examples, specimens were prepared and the comparative samples were prepared from the same specimens, and the physical properties thereof were compared and measured.
Taping
damage
Cracking resistance
Pressure
Frost formation
Oxidation resistance
Sulfuric acid 100 times spray
Aging resistance
Leave 100hr
As shown in Table 1, the epoxy primer (Example 1) according to the present invention is remarkably excellent in pinhole prevention property, and Examples 2 and 3 are excellent in crack resistance, resistance to frost formation, oxidation resistance, Lt; RTI ID = 0.0 > 1 < / RTI > and 2 as a whole.
Claims (4)
As an epoxy resin 10 to 30 parts by weight of a styrene resin, 15 to 30 parts by weight, the surfactant nonylphenol ethoxylate (Nonylphenol Ethoxylate) and sodium lauryl sulfate (Sodium Lauryl Sulfate, C 12 H 25 NaO 4 S) mixture of 0.5 to 1.5 0.2 to 0.5 part by weight of ammonium persulfate (NH 4 ) 2 S 2 O 8 and 0.2 to 0.4 part by weight of sodium bisulfite (NaHSO 3 ) as an antioxidant, a precipitation inhibitor / color pigment additive 10 to 20 parts by weight of a first mixture;
40 to 60 parts by weight of cement, 15 to 30 parts by weight of silica powder, 2 to 10 parts by weight of methylene chloride and 2 to 5 parts by weight of inorganic filler; And
A pinhole preventing agent consisting of calcium carbonate or talc having a size of 3 to 5 mu m;
The pinhole inhibitor is mixed and stirred in a weight ratio of 0.2 to 0.4 to the basic epoxy primer in which the first mixture and the second mixture are mixed at a weight ratio of 1:
0.1 to 2 parts by weight of a thickener, 0.1 to 0.5 parts by weight of a thickening aid, 0.01 to 0.2 parts by weight of a pH adjusting agent, 0.1 to 1 part by weight of a crosslinking accelerator, 0.01 to 0.5 part by weight of a plasticizer, A first reactant made by mixing a weight part and a flow resistance material;
20 to 50 parts by weight of acetic acid salt, 10 to 25 parts by weight of propylcellosolve, 5 to 20 parts by weight of potassium phosphate and 2 to 10 parts by weight of modified naphthalene condensate;
40 to 50 parts by weight of a lithium phosphoric acid based low melting point complex oxide, 10 to 20 parts by weight of an organic thickener, and 30 to 40 parts by weight of an inorganic binder; And
The epoxy resin composition according to any one of claims 1 to 3, further comprising a fourth reactant comprising at least one of a phenol derivative, an aromatic amine derivative, an amine-ketone condensate, a benzimidazole derivative, a dithiocarbamic acid derivative, .
Wherein the fifth reactant is mixed in a weight ratio of 0.1 to 0.06 based on the basic epoxy primer.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150109928A KR101791653B1 (en) | 2015-08-04 | 2015-08-04 | Epoxy Primer for Preventing Pin Hole |
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| KR1020150109928A KR101791653B1 (en) | 2015-08-04 | 2015-08-04 | Epoxy Primer for Preventing Pin Hole |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102324995B1 (en) | 2021-03-03 | 2021-11-10 | 김준현 | Primer composition having excellent water proof and adhesion property and water-proof construction method for concrete constructions |
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| KR102211455B1 (en) * | 2020-04-17 | 2021-02-04 | 주식회사 한양엔티 | Integral Waterproof Sheet with Line-Shaped Type Adhesive Layer and Waterproofing Method for Water Treatment Structure |
| KR102226268B1 (en) * | 2020-07-22 | 2021-03-11 | 주식회사 세기엔지니어링 | Crack repair primer of building structure and crack repair method for concrete structure using therefor |
| CN112210331B (en) * | 2020-09-29 | 2022-02-25 | 晶科能源股份有限公司 | Solar crystal bar bottom plate glue, preparation method thereof and solar crystal bar cutting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100911974B1 (en) | 2008-06-10 | 2009-08-13 | 장수관 | Crack repair agent composition for construction and engineering structure and method of construction for repairing crack |
| KR101174106B1 (en) * | 2012-03-27 | 2012-08-16 | (주)서현하이텍 | Method for waterproofing using polyurea |
| KR101419344B1 (en) | 2014-01-28 | 2014-07-15 | 주식회사 조운건설 | Primer composition for dehumidification and waterproofing method using thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100911974B1 (en) | 2008-06-10 | 2009-08-13 | 장수관 | Crack repair agent composition for construction and engineering structure and method of construction for repairing crack |
| KR101174106B1 (en) * | 2012-03-27 | 2012-08-16 | (주)서현하이텍 | Method for waterproofing using polyurea |
| KR101419344B1 (en) | 2014-01-28 | 2014-07-15 | 주식회사 조운건설 | Primer composition for dehumidification and waterproofing method using thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102324995B1 (en) | 2021-03-03 | 2021-11-10 | 김준현 | Primer composition having excellent water proof and adhesion property and water-proof construction method for concrete constructions |
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