KR101458418B1 - Electromagnetic wave shielding material - Google Patents

Electromagnetic wave shielding material Download PDF

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KR101458418B1
KR101458418B1 KR20130162388A KR20130162388A KR101458418B1 KR 101458418 B1 KR101458418 B1 KR 101458418B1 KR 20130162388 A KR20130162388 A KR 20130162388A KR 20130162388 A KR20130162388 A KR 20130162388A KR 101458418 B1 KR101458418 B1 KR 101458418B1
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epoxy resin
diglycidyl ether
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electromagnetic wave
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Korean (ko)
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박수진
임윤지
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인하대학교 산학협력단
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073Shielding materials
    • H05K9/0081Electromagnetic shielding materials, e.g. EMI, RFI shielding

Abstract

The present invention relates to an electromagnetic wave shielding material and, more specifically, to a green epoxy electromagnetic wave shielding material containing carbon nanotube. According to the present invention, production costs can be reduced by adding carbon nanotube with excellent electrical conductivity as a reinforcing material to an epoxy composite material consisting of a bifunctional epoxy resin and epoxidized linseed oil, and the green epoxy electromagnetic wave shielding material containing carbon nanotube with excellent electromagnetic wave shielding effectiveness can be provided using a battery-electronic material capable of exhibiting higher performance than an existing bifunctional epoxy resin.

Description

전자파 차폐재{ELECTROMAGNETIC WAVE SHIELDING MATERIAL}Electromagnetic shielding material {ELECTROMAGNETIC WAVE SHIELDING MATERIAL}

본 발명은 전자파 차폐재에 관한 것으로서, 더욱 상세하게는 탄소나노튜브를 함유하는 그린에폭시 전자파 차폐재에 관한 것이다.TECHNICAL FIELD The present invention relates to an electromagnetic wave shielding material, and more particularly, to a green epoxy electromagnetic shielding material containing carbon nanotubes.

린시드 오일(linseed oil) 등과 같은 식물유는 바이오매스 물질로서 현재 아주 널리 많은 양을 사용하고 있으며 매년 재배에 의해 많은 양이 생산되고 고갈의 위험이 없이 지속적인 생산이 가능하다. 또한, 지구 온난화의 주범인 이산화탄소 배출에 대한 기여도가 낮고 벤젠고리 화합물을 포함하고 있지 않기 때문에 자연환경에 유출시 생분해도가 높은 장점을 가지고 있다. 이러한 이유로 인하여 식물유를 대체 에너지원으로 개발하는 등 연구가 진행되어 왔다. Vegetable oils such as linseed oil are biomass materials that are now widely used in large quantities, and are produced in large quantities every year and can be continuously produced without the risk of depletion. In addition, since it does not contribute to carbon dioxide emission, which is the main cause of global warming, and does not contain a benzene ring compound, it has a high biodegradability when spilled in a natural environment. For this reason, vegetable oil has been developed as an alternative energy source.

한편, 탄소나노튜브(carbon nanotube, CNT)는 1개의 탄소 원자가 3개의 다른 탄소 원자와 결합한 육각형 벌집 모양의 흑연면이 나노크기의 직경으로 둥글게 말린 형태로서 크기나 형태에 따라 독특한 물리적 성질을 갖는다. 상기 탄소나노튜브는 높은 전기전도성, 열적 안정성, 우수한 기계적 특성 등으로 인하여 다양한 용도에 복합재료의 강화재로 널리 활용되고 있다. On the other hand, carbon nanotube (CNT) is a hexagon honeycomb graphite surface in which one carbon atom is bonded to three different carbon atoms and has a nano-sized diameter and has a unique physical property depending on its size and shape. The carbon nanotubes are widely used as reinforcing materials for composites in various applications due to their high electrical conductivity, thermal stability, and excellent mechanical properties.

이에 따라, 본 발명자들은 식물유를 이용하여 새로운 친환경적 유해물질의 배출이 적은 그린에폭시 수지를 합성하였으며, 2관능성 에폭시 수지에 에폭시화된 식물유를 하이브리드시킨 신규한 하이브리드 그린에폭시 수지 조성물을 제조하였다. 또한, 상기 그린에폭시 수지 조성물을 탄소나노튜브로 전기전도성을 부여하여 탄소나노튜브를 포함하는 그린에폭시 전자파 차폐재를 제조함으로써 본 발명을 완성하였다. 관련 선행기술로는 한국 등록특허 10-1337958(전자파 차폐용 복합재와 그 제조 방법), 한국 등록특허 10-0744517(전자파 차폐 소재) 등이 있다.Accordingly, the present inventors have synthesized a green epoxy resin having low emission of new environmentally friendly harmful substances by using vegetable oil, and prepared a novel hybrid green epoxy resin composition in which epoxidized vegetable oil is hybridized with a bifunctional epoxy resin. Further, the present invention has been accomplished by preparing a green epoxy electromagnetic wave shielding material containing carbon nanotubes by imparting electrical conductivity to the green epoxy resin composition with carbon nanotubes. Related prior arts include Korean Patent No. 10-1337958 (composite material for shielding electromagnetic wave and its manufacturing method) and Korean Patent No. 10-0744517 (electromagnetic wave shielding material).

본 발명의 목적은 2관능성 에폭시 수지와 에폭시화된 식물유로 이루어진 하이브리드 에폭시 수지 조성물에 전기전도성이 우수한 탄소나노튜브가 혼합된 그린에폭시 전자파 차폐재를 제공함에 있다.An object of the present invention is to provide a green epoxy electromagnetic shielding material in which carbon nanotubes having excellent electrical conductivity are mixed with a hybrid epoxy resin composition comprising a bifunctional epoxy resin and an epoxidized vegetable oil.

상기 목적을 달성하기 위하여, 본 발명은 2관능성 에폭시 수지 60 내지 99 중량%와 하기 화학식 1로 표시되는 에폭시화된 린시드 오일(epoxidized linseed oil, ELO) 1 내지 40 중량%로 이루어진 하이브리드 에폭시 수지 조성물에 탄소나노튜브가 혼합된 전자파 차폐재를 제공한다.In order to achieve the above object, the present invention provides a hybrid epoxy resin composition comprising 60 to 99% by weight of a bifunctional epoxy resin and 1 to 40% by weight of an epoxidized linseed oil (ELO) represented by the following formula An electromagnetic shielding material in which carbon nanotubes are mixed in a composition is provided.

[화학식 1][Chemical Formula 1]

Figure 112013118318112-pat00001
Figure 112013118318112-pat00001

상기 2관능성 에폭시 수지는 비스페놀 에프 디글리시딜에테르형 에폭시 수지, 비스페놀 에이 디글리시딜에테르형 에폭시 수지, 폴리올레핀 부가 비스페놀 에이 디글리시딜에테르형 에폭시 수지, 폴리올레핀 부가 비스페놀 에프 디글리시딜에테르형 에폭시 수지, 1,6-헥산디올 디글리시딜에테르형 에폭시 수지, 1,4-부탄디올 디글리시딜에테르형 에폭시 수지 및 시클로알리파틱 디글리시딜에테르형 에폭시 수지를 포함하는 군에서 선택되는 1 이상인 것을 특징으로 한다.Wherein the bifunctional epoxy resin is selected from the group consisting of bisphenol-diglycidyl ether type epoxy resin, bisphenol A diglycidyl ether type epoxy resin, polyolefin added bisphenol A diglycidyl ether type epoxy resin, polyolefin added bisphenol F diglycidyl Ether type epoxy resin, 1,6-hexanediol diglycidyl ether type epoxy resin, 1,4-butanediol diglycidyl ether type epoxy resin and cycloaliphatic diglycidyl ether type epoxy resin Is selected.

상기 탄소나노튜브는 하이브리드 에폭시 수지 조성물 100 중량부에 대하여 1 내지 15 중량부로 혼합되는 것을 특징으로 한다.The carbon nanotubes are mixed in an amount of 1 to 15 parts by weight based on 100 parts by weight of the hybrid epoxy resin composition.

상기 전자파 차폐재는 (1) 린시드오일(soybean oil), 빙초산(glacial acetic acid), 앰버라이트(amberlite) 및 유기용매를 혼합하는 단계; (2) 상기 (1)단계에 의해 제조된 혼합물에 과산화수소를 첨가하고 산화 반응시켜 화학식 1로 표시되는 에폭시화된 린시드오일(epoxidized linseed oil, ELO)을 제조하는 단계; (3) 상기 (2)단계에 의해 제조된 에폭시화된 린시드오일을 건조시키는 단계; (4) 상기 (3)단계에 의해 건조된 에폭시화된 린시드오일의 에폭시 수지와 2관능성 에폭시 수지를 혼합하여 하이브리드 에폭시 수지 조성물을 제조하는 단계; 및 (5) 상기 (4)단계에 의해 제조된 하이브리드 에폭시 수지 조성물 100 중량부에 대하여 1 내지 15 중량부의 탄소나노튜브를 첨가하는 단계를 포함하는 방법에 의해 제조되는 것을 특징으로 한다.The electromagnetic wave shielding material comprises (1) mixing soybean oil, glacial acetic acid, amberlite and an organic solvent; (2) adding hydrogen peroxide to the mixture prepared in the step (1) and performing an oxidation reaction to prepare an epoxidized linseed oil (ELO) represented by the formula (1); (3) drying the epoxidized linseed oil produced by the step (2); (4) mixing the epoxy resin of the epoxidized linseed oil dried by the step (3) with the bifunctional epoxy resin to prepare a hybrid epoxy resin composition; And (5) adding 1 to 15 parts by weight of carbon nanotubes to 100 parts by weight of the hybrid epoxy resin composition prepared by the step (4).

이때, (2)단계에서 산화 반응은 45 내지 60 ℃에서 6 내지 12 시간 동안 진행시키는 것을 특징으로 한다.At this time, in step (2), the oxidation reaction is carried out at 45 to 60 ° C for 6 to 12 hours.

상기와 같은 본 발명에 따르면, 2관능성 에폭시 수지와 에폭시화된 린시드 오일로 이루어진 에폭시 복합재료에 강화재로 전기전도성이 우수한 탄소나노튜브를 첨가함으로써, 제조원가가 절감되고, 종래 2관능성 에폭시 수지에 비하여 높은 성능의 발현이 가능한 전지전자재료로 이용하여 전자파 차폐 효능이 우수한 탄소나노튜브를 함유하는 그린에폭시 전자파 차폐재를 제공하는 효과가 있다.According to the present invention, the manufacturing cost is reduced by adding the carbon nanotube having excellent electrical conductivity to the epoxy composite material composed of the bifunctional epoxy resin and the epoxidized linseed oil as the reinforcement material, and the conventional bifunctional epoxy resin It is possible to provide a green epoxy electromagnetic wave shielding material containing carbon nanotubes excellent in the electromagnetic wave shielding effect by using the material as a battery electronic material capable of exhibiting high performance compared with the case of the present invention.

도 1은 본 발명에 따른 전자파 차폐재의 0.15~1.5 GHz에서의 전자파 차폐 분석 결과.FIG. 1 is a graph showing electromagnetic wave shielding analysis results at 0.15 to 1.5 GHz of the electromagnetic wave shielding material according to the present invention. FIG.

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

본 발명은 2관능성 에폭시 수지 60 내지 99 중량%와 하기 화학식 1로 표시되는 에폭시화된 린시드 오일(epoxidized linseed oil, ELO) 1 내지 40 중량%로 이루어진 하이브리드 에폭시 수지 조성물에 탄소나노튜브가 혼합된 전자파 차폐재를 제공한다. 상기 2관능성 에폭시 수지와 에폭시화된 린시드 오일은 각각 80 내지 90 중량% 및 10 내지 20 중량%로 혼합되는 것이 최적의 효과를 나타낸다.The present invention relates to a hybrid epoxy resin composition comprising 60 to 99% by weight of a bifunctional epoxy resin and 1 to 40% by weight of an epoxidized linseed oil (ELO) represented by the following formula (1) Shielding material. The bifunctional epoxy resin and the epoxidized linseed oil are mixed in an amount of 80 to 90% by weight and 10 to 20% by weight, respectively.

[화학식 1][Chemical Formula 1]

Figure 112013118318112-pat00002
Figure 112013118318112-pat00002

이하, 실시예를 통하여 본 발명을 더욱 상세히 설명하고자 한다. 이들 실시예는 오로지 본 발명을 예시하기 위한 것으로서, 본 발명의 범위가 이들 실시예에 의해 제한되는 것으로 해석되지 않는 것은 당업계에서 통상의 지식을 가진 자에게 있어서 자명할 것이다.Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are merely illustrative of the present invention and that the scope of the present invention is not construed as being limited by these embodiments.

실시예 1.Example 1.

(1) 린시드오일(linseed oil, 100 g), 빙초산(glacial acetic acid, 24.5 g), 앰버라이트(Amberlite, 29 g) 및 톨루엔(toluene, 40 g)을 교반기, 온도계 및 콘덴서가 부착된 반응기에 넣고 55 ℃로 온도를 유지한 후, 과산화수소(hydrogen peroxide, 91.68 g)를 천천히 적가하여 7 시간 동안 하기 반응식 1과 같이 반응시켰다. 반응이 종결되면 pH 7이 될 때까지 NaCO3와 증류수로 세척과 필터링을 반복하였다. 상기 과정을 통해 얻어진 반응물에 무수황산나트륨(anhydrous sodium sulfate)을 넣어 수분을 제거하고 필터링한 후 80 ℃의 진공오븐에서 건조하여 수율 89%의 에폭시화된 린시드 오일(Epoxidized linseed oil, ELO)을 얻었다. (1) A reactor equipped with a stirrer, a thermometer and a condenser was charged with 100 g of linseed oil, 24.5 g of glacial acetic acid, 29 g of Amberlite and 40 g of toluene. , Hydrogen peroxide (91.68 g) was slowly added dropwise thereto, and the mixture was reacted for 7 hours as shown in the following reaction formula (1). After the reaction was completed, washing and filtering were repeated with NaCO 3 and distilled water until the pH reached 7. Anhydrous sodium sulfate was added to the reactant obtained through the above process to remove moisture, followed by filtering and drying in a vacuum oven at 80 ° C. to obtain an epoxidized linseed oil (ELO) having a yield of 89% .

(2) 2관능성 에폭시 수지로서, 밀도 1.16 g/cm3, 점도 12,000 cps, 당량=185~190 g/eq.인 디글리시딜에테르 비스페놀 A(diglycidylether of bisphenol A, DGEBA) 90 중량%에 상기 (1)에서 제조된 ELO 10 중량%를 혼합하여하이브리드 그린에폭시 조성물을 제조하였다. 상기 그린에폭시 조성물에 대하여 탄소나노튜브(carbon nanotube)를 1.9 중량% 첨가하여 혼합한 후, 변성 지환족 아민 경화제와 1:1의 당량비로 반응시켜 시편을 제작하였다.(2) 90% by weight of a diglycidylether of bisphenol A (DGEBA) having a density of 1.16 g / cm 3 , a viscosity of 12,000 cps and an equivalent of 185 to 190 g / eq as a bifunctional epoxy resin 10 wt% of the ELO prepared in (1) above was mixed to prepare a hybrid green epoxy composition. 1.9 wt% of carbon nanotubes were added to the green epoxy composition, mixed with the modified alicyclic amine curing agent at an equivalent ratio of 1: 1, and a specimen was prepared.

[반응식 1][Reaction Scheme 1]

Figure 112013118318112-pat00003
Figure 112013118318112-pat00003

실시예 2.Example 2.

상기 실시예 1.과 동일한 과정을 실시하되, 탄소나노튜브 4.7 중량%을 첨가하여 시편을 제작하였다. The same procedure as in Example 1 was carried out, except that 4.7% by weight of carbon nanotubes was added to prepare a specimen.

실시예 3.Example 3.

상기 실시예 1.과 동일한 과정을 실시하되, 탄소나노튜브 7.4 중량%을 첨가하여 시편을 제작하였다. The same procedure as in Example 1 was carried out, except that 7.4 wt% of carbon nanotubes were added to prepare specimens.

실시예 4.Example 4.

상기 실시예 1과 동일한 과정을 실시하되, 탄소나노튜브 11.5 중량%을 첨가하여 시편을 제작하였다. The same procedure as in Example 1 was carried out except that 11.5% by weight of carbon nanotubes was added to prepare a specimen.

비교예.Comparative Example.

DGEBA 90 중량%에 상기 실시예 1.에서 제조된 ELO 10 중량%를 혼합하여 지환족 아민 경화제와 1:1의 당량비로 반응시켜 시편을 제작하였다.10 wt% of ELO prepared in Example 1 was mixed with 90 wt% of DGEBA and reacted with an alicyclic amine curing agent at an equivalent ratio of 1: 1 to prepare a test piece.

실험예 1.Experimental Example 1

상기 실시예 1.에서 제조한 ELO의 화학구조 변화를 관찰하기 위하여 Thermo SCINTIFIC사의 FT-IR Spectrometer (Niclet, iS10)를 사용하여 FT-IR 스펙트럼을 측정하였으며, 그 결과를 하기 표 1에 나타내었다.The FT-IR spectrum was measured using a FT-IR Spectrometer (Niclet, iS10) manufactured by Thermo SCINTIFIC Inc. to observe the change in the chemical structure of the ELO prepared in Example 1. The results are shown in Table 1 below.

Figure 112013118318112-pat00004
Figure 112013118318112-pat00004

실험예 2.Experimental Example 2

상기 실시예 1.에서 제조한 ELO의 NMR 스펙트럼을 확인하기 위하여 400 MHz에서 chloroform-d를 용매로, JEOL사의 FT/NMR spectrometr (JNM-EX400)를 사용하여 1H NMR과 13C NMR 스펙트럼을 측정하였으며, 그 결과를 하기 표 2에 나타내었다.To confirm the NMR spectrum of the ELO prepared in Example 1, 1 H NMR and 13 C NMR spectra were measured at 400 MHz using chloroform-d as a solvent and FT / NMR spectrometer (JNM-EX400) of JEOL Co. The results are shown in Table 2 below.

Figure 112013118318112-pat00005
Figure 112013118318112-pat00005

실험예 3.Experimental Example 3.

상기 실시예 1. 내지 4.에서 제조한 탄소나노튜브를 포함하는 그린에폭시 전자파 차폐재 및 비교예의 하이브리드 그린에폭시 수지 조성물이 경화된 시편의 전자파 차폐특성을 관찰하기 위하여 ASTM D4935-89에 준하여 전자파차폐 측정기를 이용하여 분석하고, 그 결과를 도 1에 나타내었다. In order to observe the electromagnetic wave shielding properties of the green epoxy epoxy shielding materials containing the carbon nanotubes prepared in Examples 1 to 4 and the hybrid green epoxy resin compositions of the comparative examples, the electromagnetic shielding characteristics were measured according to ASTM D4935-89, , And the results are shown in Fig.

이상, 본 발명내용의 특정한 부분을 상세히 기술하였는바, 당업계의 통상의 지식을 가진 자에게 있어서, 이러한 구체적인 기술은 단지 바람직한 실시태양일 뿐이며, 이에 의해 본 발명의 범위가 제한되는 것이 아닌 점은 명백할 것이다. 따라서 본 발명의 실질적인 범위는 첨부된 청구항들과 그것들의 등가물에 의해 정의된다고 할 것이다.
Having described specific portions of the present invention in detail, it will be apparent to those skilled in the art that this specific description is only a preferred embodiment and that the scope of the present invention is not limited thereby. It will be obvious. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

Claims (5)

2관능성 에폭시 수지 60 내지 99 중량%와 하기 화학식 1로 표시되는 에폭시화된 린시드 오일(epoxidized linseed oil, ELO) 1 내지 40 중량%로 이루어진 하이브리드 에폭시 수지 조성물에 탄소나노튜브가 혼합된 전자파 차폐재.
[화학식 1]
Figure 112013118318112-pat00006

(EN) A hybrid epoxy resin composition comprising 60 to 99% by weight of a bifunctional epoxy resin and 1 to 40% by weight of an epoxidized linseed oil (ELO) represented by the following formula (1) .
[Chemical Formula 1]
Figure 112013118318112-pat00006

제 1항에 있어서,
상기 2관능성 에폭시 수지는 비스페놀 에프 디글리시딜에테르형 에폭시 수지, 비스페놀 에이 디글리시딜에테르형 에폭시 수지, 폴리올레핀 부가 비스페놀 에이 디글리시딜에테르형 에폭시 수지, 폴리올레핀 부가 비스페놀 에프 디글리시딜에테르형 에폭시 수지, 1,6-헥산디올 디글리시딜에테르형 에폭시 수지, 1,4-부탄디올 디글리시딜에테르형 에폭시 수지 및 시클로알리파틱 디글리시딜에테르형 에폭시 수지를 포함하는 군에서 선택되는 1 이상인 것을 특징으로 하는 전자파 차폐재.
The method according to claim 1,
Wherein the bifunctional epoxy resin is selected from the group consisting of bisphenol-diglycidyl ether type epoxy resin, bisphenol A diglycidyl ether type epoxy resin, polyolefin added bisphenol A diglycidyl ether type epoxy resin, polyolefin added bisphenol F diglycidyl Ether type epoxy resin, 1,6-hexanediol diglycidyl ether type epoxy resin, 1,4-butanediol diglycidyl ether type epoxy resin and cycloaliphatic diglycidyl ether type epoxy resin Wherein the electromagnetic wave shielding material is at least one selected from the group consisting of aluminum oxide and aluminum oxide.
제 1항에 있어서,
상기 탄소나노튜브는 하이브리드 에폭시 수지 조성물 100 중량부에 대하여 1 내지 15 중량부로 혼합되는 것을 특징으로 하는 전자파 차폐재.
The method according to claim 1,
Wherein the carbon nanotubes are mixed in an amount of 1 to 15 parts by weight based on 100 parts by weight of the hybrid epoxy resin composition.
제 1항에 있어서,
상기 전자파 차폐재는 하기와 같은 방법으로 제조되는 것을 특징으로 하는 전자파 차폐재.
(1) 린시드오일(soybean oil), 빙초산(glacial acetic acid), 앰버라이트(amberlite) 및 유기용매를 혼합하는 단계;
(2) 상기 (1)단계에 의해 제조된 혼합물에 과산화수소를 첨가하고 산화 반응시켜 화학식 1로 표시되는 에폭시화된 린시드오일(epoxidized linseed oil, ELO)을 제조하는 단계;
(3) 상기 (2)단계에 의해 제조된 에폭시화된 린시드오일을 건조시키는 단계;
(4) 상기 (3)단계에 의해 건조된 에폭시화된 린시드오일의 에폭시 수지와 2관능성 에폭시 수지를 혼합하여 하이브리드 에폭시 수지 조성물을 제조하는 단계; 및
(5) 상기 (4)단계에 의해 제조된 하이브리드 에폭시 수지 조성물 100 중량부에 대하여 1 내지 15 중량부의 탄소나노튜브를 첨가하는 단계.
The method according to claim 1,
Wherein the electromagnetic wave shielding material is manufactured by the following method.
(1) mixing soybean oil, glacial acetic acid, amberlite and an organic solvent;
(2) adding hydrogen peroxide to the mixture prepared in the step (1) and performing an oxidation reaction to prepare an epoxidized linseed oil (ELO) represented by the formula (1);
(3) drying the epoxidized linseed oil produced by the step (2);
(4) mixing the epoxy resin of the epoxidized linseed oil dried by the step (3) with the bifunctional epoxy resin to prepare a hybrid epoxy resin composition; And
(5) adding 1 to 15 parts by weight of the carbon nanotube to 100 parts by weight of the hybrid epoxy resin composition produced by the step (4).
제 4항에 있어서,
상기 (2)단계에서 산화 반응은 45 내지 60 ℃에서 6 내지 12 시간 동안 진행시키는 것을 특징으로 하는 전자파 차폐재.













5. The method of claim 4,
Wherein the oxidation reaction is carried out at 45 to 60 DEG C for 6 to 12 hours in the step (2).













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Publication number Priority date Publication date Assignee Title
KR102303105B1 (en) 2021-05-04 2021-09-17 주식회사 금산전기 Installation method for shielding electromagnetic waves

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KR20050098866A (en) * 2003-01-08 2005-10-12 텍사스 테크 유니버시티 Castor oil/epoxidized soybean oil based elastomeric compositions
KR20050110457A (en) * 2004-05-19 2005-11-23 한국화학연구원 Composition of hybrid epoxy resin containing two funtional groups
KR20120014426A (en) * 2010-08-09 2012-02-17 금호피앤비화학 주식회사 Preparing method of 1 component type waterborne epoxy resin

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050098866A (en) * 2003-01-08 2005-10-12 텍사스 테크 유니버시티 Castor oil/epoxidized soybean oil based elastomeric compositions
KR20050110457A (en) * 2004-05-19 2005-11-23 한국화학연구원 Composition of hybrid epoxy resin containing two funtional groups
KR20120014426A (en) * 2010-08-09 2012-02-17 금호피앤비화학 주식회사 Preparing method of 1 component type waterborne epoxy resin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102303105B1 (en) 2021-05-04 2021-09-17 주식회사 금산전기 Installation method for shielding electromagnetic waves

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