KR20040067059A - An Adiabatic Waterproofer - Google Patents

An Adiabatic Waterproofer Download PDF

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Publication number
KR20040067059A
KR20040067059A KR1020030004020A KR20030004020A KR20040067059A KR 20040067059 A KR20040067059 A KR 20040067059A KR 1020030004020 A KR1020030004020 A KR 1020030004020A KR 20030004020 A KR20030004020 A KR 20030004020A KR 20040067059 A KR20040067059 A KR 20040067059A
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South Korea
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weight
parts
waterproofing agent
adiabatic
cement
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KR1020030004020A
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Korean (ko)
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이석주
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주식회사 네이엔
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Priority to KR1020030004020A priority Critical patent/KR20040067059A/en
Publication of KR20040067059A publication Critical patent/KR20040067059A/en

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/18—Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • 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
    • C04B41/4857—Other macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B41/4869—Polyvinylalcohols, polyvinylacetates
    • 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
    • C04B41/50—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 inorganic materials
    • C04B41/5098—Cermets

Abstract

PURPOSE: Provided is an adiabatic waterproofer, which has excellent adiabatic property, antimicrobial effect, wear-resistance, weather-resistance and water-repellency. CONSTITUTION: The adiabatic waterproofer comprises 100 parts by weight of a liquid containing 20-35 parts by weight of an EVA resin, 2-35 parts by weight of an acrylic emulsion resin, 30-45 parts by weight of water and 15-25 parts by weight of chlorinated paraffin(on the basis of 40%); and 50-250 parts by weight of a powder containing 25-40 parts by weight of cement, 35-50 parts by weight of silica sand and 10-25 parts by weight of cenosphere. Furthermore, additives such as plasticizers, preservatives and antimicrobial agents may be added in an amount of 0.1 parts by weight or less, based on 100 parts by weight of liquid. As an antimicrobial agent, 0.001-0.01 parts by weight of copper sulfate may be additionally used.

Description

단열성 방수제{An Adiabatic Waterproofer}An Adiabatic Waterproofer

본 발명은 단열성 방수제에 관한 것으로, 보다 상세하기로는 통상의 방수제와 동등 이상의 방수기능을 발휘함과 동시에 높은 단열성을 가진 방수제에 관한 것이다.The present invention relates to a heat insulating waterproofing agent, and more particularly, to a waterproofing agent having a high heat insulating property while exhibiting a waterproofing function equivalent to or higher than that of a normal waterproofing agent.

방수제는 유기계 및 무기계 방수제가 시판되고 있으며, 건축물의 외부에는 무기계 방수제가 일반적으로 사용되고 있다. 무기계 방수제는 시멘트와 규사를 주원료로 하여 아크릴수지가 적량 첨가된다.Organic and inorganic waterproofing agents are commercially available, and inorganic waterproofing agents are generally used outside of buildings. Inorganic waterproofing agent is mainly made of cement and silica sand, and acrylic resin is appropriately added.

이에 관한 종래의 기술을 살펴보면, 한국특허 제294805호에서는 아크릴수지 23-31중량%, 시멘트 23-31중량%, 규사 30-48중량% 및 기타 첨가제 잔량으로 구성되는 방수제가 개시되어 있다. 한국공개특허 제2000-17879호에서는 시멘트 : 규사 : EVA : 활성실리카 : 물을 57 : 7 : 1 : 1 : 33이 되도록 구성되는 방수제가 개시되었다. 또한, 한국공개특허 제2002-31684호에서는 물 35-55중량부를 40-50℃로 가열하고 여기에 비이온성 계면활성제 5-10중량부와 칼슘 스테아레이트 40-60중량부를 첨가하여 유화분산시키고, 180-200중량부의 아크릴 에멀젼 수지 공중합체와 혼합시켜 에멀젼 A제를 제조하는 단계; 및 백색 포틀랜트 시멘트 100중량부에 7호규사 50-70중량부, 크롬 옥사이드 5-9중량부 및 폴리옥시에틸렌 라우릴에테르 0.1-0.5중량부를 혼합한 B제를 상기 A제와 1 : 0.25중량비 되도록 혼합시키는 단계로 이루어지는 방수제가 개시되어 있다.Looking at the related art, Korean Patent No. 294805 discloses a waterproofing agent composed of 23-31% by weight of acrylic resin, 23-31% by weight of cement, 30-48% by weight of silica sand and other additives. Korean Patent Laid-Open Publication No. 2000-17879 discloses a waterproofing agent composed of 57: 7: 1: 1: 33: cement: silica sand: EVA: activated silica: water. In addition, in Korean Patent Laid-Open Publication No. 2002-31684, 35-55 parts by weight of water is heated to 40-50 ° C., and emulsified and dispersed by adding 5-10 parts by weight of a nonionic surfactant and 40-60 parts by weight of calcium stearate, Preparing an emulsion A agent by mixing with 180-200 parts by weight of an acrylic emulsion resin copolymer; And 100 parts by weight of white Portland cement, 50-70 parts by weight of No. 7 silica sand, 5-9 parts by weight of chromium oxide, and 0.1-0.5 parts by weight of polyoxyethylene lauryl ether. A waterproofing agent is disclosed, which comprises a step of mixing as much as possible.

상기 종래 기술들은 비교적 내후성과 내수성 및 방수성이 우수하여 실내 및 지하실, 그리고 건물 옥상 등에 효과적으로 사용될 수 있다. 그러나 위와 같은 종래 기술들은 모두 단열성이 부족하다는 문제점이 있다. 이에 따라 상기 종래 기술들에 의하여 방수시공된 경우라도 단열성을 부여하기 위해서는 별도로 단열시공을 하여야 한다.The conventional techniques are relatively excellent in weather resistance, water resistance and waterproofness can be effectively used indoors, basements, roofs of buildings and the like. However, all of the prior art as described above has a problem that the insulation is insufficient. Accordingly, even in the case of waterproofing according to the prior art, in order to give insulation, it must be separately insulated.

본 발명은 상기한 바와 같은 문제점을 해결하기 위한 것으로, 방수성능을 발휘함과 동시에 단열성능을 발휘할 수 있는 단열성 방수제를 제공하는 것을 목적으로 한다. 본 발명의 다른 목적은 보다 가벼운 방수제를 제공하는 것이다.The present invention has been made to solve the above problems, and an object of the present invention is to provide a heat insulating waterproof agent capable of exhibiting waterproof performance and at the same time exhibiting heat insulating performance. Another object of the present invention is to provide a lighter waterproofing agent.

본 발명의 방수제는 20-35중량부의 EVA 수지, 20-35중량부의 아크릴 에멀젼 수지, 염화파라핀 15-25중량부, 물 30-45중량부를 포함하는 액제 100중량부에, 시멘트 25-40중량부, 규사 35-50중량부, 세노스페어 10-25중량부를 포함하는 분말제제가 150-250중량부 첨가된 것으로 구성된다.The waterproofing agent of the present invention includes 20 to 35 parts by weight of EVA resin, 20 to 35 parts by weight of an acrylic emulsion resin, 15 to 25 parts by weight of paraffin chloride and 30 to 45 parts by weight of water, 25 to 40 parts by weight of cement. It is composed of a powder formulation including 35-50 parts by weight of silica sand and 10-25 parts by weight of ceno spare is added 150-250 parts by weight.

이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.

방수제에 접착력을 부여하기 위하여 통상 아크릴 에멀젼 수지가 사용된다. 그러나 이것을 단독으로 사용하게되면 지속적으로 경화가 일어나 갈라짐이 발생하게 된다. 본 발명에서는 이를 방지하기 위하여 EVA를 같이 사용한다. EVA는 접착력은 상대적으로 부족하지만 아크릴 에멀젼 수지의 갈라짐 현상을 방지할 수 있으며 또한 내후성과 내수성을 증진시킬 수 있다. 그 적절한 량은 액제 100중량부에 대하여 각각 20-35중량부이다. 이 범위 미만의 경우에는 접착효과가 부족하며, 이 범위를 초과할 경우에는 더 이상 접착력이 증가하지 않는다.Acrylic emulsion resins are usually used to impart adhesion to the waterproofing agent. However, when used alone, the hardening occurs continuously, resulting in cracking. In the present invention, EVA is used together to prevent this. EVA is relatively poor in adhesion but can prevent cracking of the acrylic emulsion resin and can also improve weather resistance and water resistance. The suitable amount is 20-35 weight part with respect to 100 weight part of liquid solutions, respectively. If it is less than this range, the adhesive effect is insufficient, and if it exceeds this range, the adhesive force no longer increases.

또한 방수제의 접착력을 더욱 증가시키고 난연성을 부여하기 위해서 염화파라핀이 첨가된다. 염화파라핀(40% 기준)의 적절한 첨가량은 액제 100중량부에 대하여 15-25중량부이며, 이 범위 미만의 경우에는 첨가효과가 부족하며, 이 범위를 초과할 경우에는 더 이상의 상승효과를 발휘하지 아니한다.In addition, paraffin chloride is added to further increase the adhesion of the waterproofing agent and impart flame retardancy. Appropriate amount of paraffin chloride (based on 40%) is 15-25 parts by weight based on 100 parts by weight of the liquid. If it is less than this range, the effect of addition is insufficient. If it exceeds this range, no further synergistic effect is exerted. No.

액제에는 상기 성분 외에 필요에 따라 가소제, 방부제, 방비제 등이 적량 첨가될 수 있으며, 방비제는 곰팡이의 발생을 방지하는 것으로 방비제 성분으로는 황산동이 추천된다. 각 첨가제의 사용량은 모두 액제 100중량부에 대하여 0.1중량부 이내이다.In addition to the above components, a suitable amount of plasticizer, preservative, antifoam, etc. may be added to the liquid, if necessary, and the antifoam prevents the occurrence of mold. The usage-amount of each additive is all within 0.1 weight part with respect to 100 weight part of liquid formulations.

본 발명의 분말제제는 시멘트, 규사, 세노스페어를 포함한다. 시멘트와 규사는 통상의 방수제에 널리 사용되고 있는 성분이다. 본 발명에서는 이 외에 세노스페어가 필수적으로 사용된다.The powder formulation of the present invention includes cement, silica sand, and ceno spare. Cement and silica are the components widely used in conventional waterproofing agents. In the present invention, in addition to the senole spare is essentially used.

세노스페어라 함은 석탄재의 일종으로서, 석탄재가 바다에 매립될 때 부유하게 되는 물질이다. 비중이 0.5 정도이며 주성분은 Si와 Al이다. 내부는 비어 있으며 형상은 구형이다. 이러한 세노스페어는 그 동안 적절한 용도가 개발되지 아니하여 현재 대부분 매립장에 그대로 방치되고 있는 실정이다.Cenospare is a kind of coal ash, a substance that becomes rich when coal ash is buried in the sea. Specific gravity is about 0.5 and main components are Si and Al. The interior is empty and the shape is spherical. Such senofare is currently being left as it is in most landfills because no proper use has been developed.

분말제제의 적절한 사용비율은 분말제제 100중량부에 대하여 시멘트 25-40중량부, 규사 35-50중량부, 세노스페어 10-25중량부이다. 시멘트가 상기 범위 미만인 경우에는 시공된 방수층의 강도가 부족하게 되며, 상기 범위를 초과할 경우에는 더 이상의 강도증가는 보이지 않는다. 규사의 사용량이 상기 범위를 벗어날 경우에는 역시 강도가 저하되며, 갈라짐 현상 등이 발생할 수 있다.Suitable use ratio of the powder preparation is 25-40 parts by weight of cement, 35-50 parts by weight of silica sand, and 10-25 parts by weight of ceno spare, based on 100 parts by weight of the powder preparation. If the cement is less than the above range, the strength of the constructed waterproof layer is insufficient, and if it exceeds the above range, no further increase in strength is seen. When the amount of silica sand is out of the above range, the strength is also lowered, and cracking may occur.

세노스페어의 사용에 의하여 단열성을 부여할 수 있으며, 이의 사용량이 상기 범위 미만의 경우에는 단열성이 부족하게 되며, 상기 범위를 초과할 경우에는 방수층의 강도가 저하하게 된다.Thermal insulation may be imparted by the use of Ceno spares, and if the amount thereof is less than the above range, the thermal insulation may be insufficient, and if it exceeds the above range, the strength of the waterproof layer is lowered.

액제와 분말제제의 적절한 배합비율은 액제 100중량부에 대하여 분말제제 150-250중량부이다. 분말제제의 사용비율이 상기 범위 미만의 경우에는 시공된 방수층의 강도 및 단열성이 부족하게 되며, 상기 범위를 초과할 경우에는 방수층의 내수성 및 방수성이 부족하게 된다. 분말제제에는 상기 성분 외에 필요에 따라 무기안료, 방수조제 등을 소량 첨가할 수 있다.A suitable blending ratio of the liquid preparation and the powder preparation is 150-250 parts by weight of the powder preparation with respect to 100 parts by weight of the liquid preparation. When the use ratio of the powder formulation is less than the above range, the strength and heat insulation of the constructed waterproof layer is insufficient, and when the ratio exceeds the above range, the water resistance and waterproofness of the waterproof layer are insufficient. In addition to the above components, a small amount of an inorganic pigment, a waterproofing aid, or the like may be added to the powder formulation, if necessary.

본 발명의 실시예는 아래와 같다.An embodiment of the present invention is as follows.

(실시예 1)(Example 1)

EVA 2.5Kg, 아크릴 에멀젼 2.8Kg, 40% 염화파라핀 0.9Kg, 물 3.4 Kg에 시판되는 통상의 분산제(44S) 0.1g, 가소제(DBP) 0.2g을 넣고 잘 혼합하여 액제를 제조하였다.A liquid formulation was prepared by adding 2.5 g of EVA, 2.8 Kg of acrylic emulsion, 0.9 Kg of 40% paraffin chloride, and 3.4 Kg of water, 0.1 g of a conventional dispersant (44S) and 0.2 g of a plasticizer (DBP).

또한, 규사(80메쉬) 8Kg, 시멘트 6Kg, 세노스페어 3Kg을 혼합하여 분말제제를 제조한 후 상기 액제에 첨가하고 충분히 혼합하여 방수제를 얻었다.In addition, 8 Kg of silica sand (80 mesh), 6 Kg of cement, and 3 Kg of ceno spare were mixed to prepare a powder formulation, which was then added to the liquid formulation and sufficiently mixed to obtain a waterproofing agent.

이 방수제와 시판되고 있는 아크릴 에멀젼 40중량부와 시멘트 및 규사 100중량부로 구성된 방수제(이하, "시판제품"으로 칭함)과 물성을 비교한 결과는 아래의 표1과 같았다.The results of comparing the waterproofing agent with the waterproofing agent (hereinafter, referred to as "commercially available product") consisting of 40 parts by weight of the acrylic emulsion and 100 parts by weight of cement and silica sand were compared with those of the physical properties.

콘크리트 시편에 방수제를 3mm 두께로 도포하고 경화시킨 후, 접착강도는 KSF 4918에 의거 측정하였고, 내마모성은 CS-17휠/1000g/100회 반복하여 측정하였으며, 발수성은 3일 경화된 방수층에 물을 뿌려 비딩(beading)효과를 육안으로 관찰하여 측정하였다. 내후성은 크사논 2.5kW에 24시간 노출시킨 후 폭우상태에서 24시간 방치하는 것을 1싸이클로 하여 1개월간 총 15싸이클을 실시하여 측정하였다.After coating and curing the concrete specimen with a thickness of 3mm and curing it, the adhesive strength was measured according to KSF 4918, and the abrasion resistance was measured repeatedly by CS-17 wheel / 1000g / 100 times. Sprinkle beading effect was observed by visual observation. Weathering resistance was measured by 24 cycles of exposure to 2.5 kW of xanon for 24 hours, followed by a total of 15 cycles for 1 month.

실시예 1Example 1 시판제품Commercial product 접착강도 (kgf/cm2)Adhesive Strength (kgf / cm 2 ) 2323 1515 내마모성 (mg)Abrasion Resistance (mg) 89 ±589 ± 5 75 ±575 ± 5 발수성Water repellency 우수Great 보통usually 내후성Weather resistance 표면균열없음No surface crack 표면균열없음No surface crack

(실시예 2)(Example 2)

실시예1과 동일하게 시행하되, 액제에 방비제로 황산동을 1g 첨가하였다. 여기서 얻어진 방수제 및 실시예 1에 의하여 얻어진 방수제를 콘크리트 시편에 3mm두께로 도포하고 경화시킨 후 수분을 가한 다음, 온도 25-30℃ 습도 80-85%의 범위로 30일간 유지시키는 방법으로 방비효과를 시험한 결과, 실시예1에 의하여 얻어진 방수제의 표면에는 곰팡이가 발생한 것이 육안으로 관찰되었으나, 실시예2에 의한 방수제에는 곰팡이가 전혀 발생하지 아니하였다.In the same manner as in Example 1, 1g of copper sulfate was added to the liquid as a defense agent. The waterproofing agent obtained in Example 1 and the waterproofing agent obtained in Example 1 were applied to a concrete specimen with a thickness of 3 mm, cured, added with moisture, and then maintained for 30 days at a temperature of 25-30 ° C and a humidity of 80-85% for 30 days. As a result of the test, mold was visually observed on the surface of the waterproofing agent obtained in Example 1, but no mold was generated in the waterproofing agent according to Example 2.

(실시예 3)(Example 3)

실시예1에 의하여 얻어진 방수제를 콘크리트 공시체(Φ150mm×H200mm)에 3mm 두께로 도포하고 건조시킨 후 중앙(D50mm)에서 온도를 측정하는 방식으로 단열성을 측정하였다. 80℃의 온도에서 시작하여 실온(22.5℃)에 방치하여 120분이 경과한 시점에서의 온도는 34.4℃였으며, 방수제를 도포하지 아니한 동일한 공시체의 온도는 29.3℃로서 5.1℃의 온도차가 발생하였다.The waterproofing agent obtained in Example 1 was applied to the concrete specimen (Φ150mm × H200mm) with a thickness of 3mm and dried, and then thermal insulation was measured by measuring the temperature at the center (D50mm). The temperature at the time of 120 minutes after starting at a temperature of 80 ° C. and standing at room temperature (22.5 ° C.) was 34.4 ° C., and the temperature of the same specimen without a waterproofing agent was 29.3 ° C. and a temperature difference of 5.1 ° C. occurred.

또한, 시판제품을 상기 콘크리트 공시체에 3mm의 두께로 도포하고 동일한 방법으로 단열성을 측정한 결과 공시체의 온도는 31.5℃로서 방수제를 도포하지 아니한 공시체의 온도보다는 1.2℃가 높았으나, 본 발명의 방수 몰탈을 도포한 공시체의 온도보다는 2.9℃가 낮았다.In addition, the commercial product was applied to the concrete specimen with a thickness of 3 mm and the insulation was measured by the same method. As a result, the temperature of the specimen was 31.5 ° C, which was 1.2 ° C. higher than that of the specimen without the waterproofing agent, but the waterproof mortar of the present invention. It was 2.9 ° C. lower than the temperature of the coated specimen.

이상의 실시예를 통하여 확인되는 바와 같이, 본 발명의 방수제는 종래의 방수제와 동등 이상의 내마모성, 내후성, 발수성 등을 가짐과 동시에, 방비효과가 우수할 뿐만 아니라, 특히 뛰어난 단열성을 가진다.As can be seen from the above examples, the waterproofing agent of the present invention has abrasion resistance, weather resistance, water repellency, and the like equivalent to that of the conventional waterproofing agent, and is not only excellent in anti-fogging effect, but also particularly excellent insulator.

Claims (2)

20-35중량부의 EVA 수지, 20-35중량부의 아크릴 에멀젼 수지, 물 30-45중량부 및 염화파라핀 15-25 중량부(40% 농도 기준)를 포함하는 액제 100중량부에, 시멘트 25-40중량부, 규사 35-50중량부, 세노스페어 10-25중량부를 포함하는 분말제제가 150-250중량부 첨가된 것을 특징으로 하는 단열성 방수제.To 25 parts by weight of a liquid containing 20 to 35 parts by weight of EVA resin, 20 to 35 parts by weight of an acrylic emulsion resin, 30 to 45 parts by weight of water and 15 to 25 parts by weight of paraffin chloride (based on 40% concentration), cement 25-40 Insulating waterproofing agent, characterized in that 150-250 parts by weight of a powder formulation including parts by weight, 35-50 parts by weight of silica sand, 10-25 parts by weight of ceno spare. 제1항에 있어서, 액제 100중량부에 대하여 황산동이 0.001-0.01 중량부 첨가된 것을 특징으로 하는 단열성 방수제.The heat insulating waterproofing agent according to claim 1, wherein 0.001-0.01 parts by weight of copper sulfate is added to 100 parts by weight of the liquid.
KR1020030004020A 2003-01-21 2003-01-21 An Adiabatic Waterproofer KR20040067059A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100732234B1 (en) * 2005-07-28 2007-06-27 (주)알씨에스코리아 Permeable complex waterproof material
KR20180000776U (en) 2016-09-07 2018-03-15 배준성 Support for portable electronic appliance
KR20200094347A (en) * 2019-01-30 2020-08-07 주식회사 신영기업 Water soluble elastic insulation waterproof agent and method for pavement marking using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100732234B1 (en) * 2005-07-28 2007-06-27 (주)알씨에스코리아 Permeable complex waterproof material
KR20180000776U (en) 2016-09-07 2018-03-15 배준성 Support for portable electronic appliance
KR20200094347A (en) * 2019-01-30 2020-08-07 주식회사 신영기업 Water soluble elastic insulation waterproof agent and method for pavement marking using the same

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