• 한국응용과학기술학회지
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• 제27권3호
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• pp.325-336
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• 2010

In this study, we experimented that how to synthesis waterborne urethane-epoxy hybrid resin for leather garment coatings. First of all, We had analyzed datas by FT-IR, SEM and TGA for the machanical properties. By instruments analysis measurement we confirmed that synthesis of urethane and epoxy. In this experiment we knew that polyurethane and urethane-epoxy hybrid resin have 4~5 grades of solvent resistance. Tensile strength measured in the urethane-epoxy resin(epoxy 12%, 2.033$kg_f/mm^2$) had the most strong strength than polyurethane(1.833 $kg_f/mm^2$) emulsion samples. Also urethane-epoxy hybrid resin had better result than polyurethane in acid resistance and abrasion test. As hight proportion of epoxy in hybid resin, we obtained low elongation and low flexibility. In this result, the mechanical properties of waterborne polyurethane-epoxy hybrid resin showed that how effect in leather coating by ratio of epoxy emulsion.

• 한국응용과학기술학회지
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• 제28권1호
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• pp.109-117
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• 2011

In this study, we experimented that how influence chain extension to waterborne urethane-epoxy hybrid resin for leather garment coatings. First of all, We had analyzed datas by FT-IR, SEM and machanical properties. By instruments analysis measurement we confirmed that synthesis of epoxy and hybrid resin. In this experiment we knew that polyurethane-epoxy hybrid resin have 5 grades of solvent resistance. Tensile strength measured in the polyurethane-epoxy resin(EDA 5.37g, 2.386 $kg_f/mm^2$) had the most strong strength.. Also polyurethane-epoxy hybrid resin had better result(EDA 5.37g. 37.4 mg. loss) than other hybrid resins. As hight proportion of EDA in hybid resin, we obtained low elongation and low flexibility. In this result, chain extension of waterborne polyurethane-epoxy hybrid resin showed that how effect in leather coating by ratio of EDA.

• 접착 및 계면
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• 제16권1호
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• pp.22-28
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• 2015

본 연구에서는 수분산 폴리우레탄의 내가수분해성 및 접착력을 향상시키기 위하여 polyester polyol, epoxy resin, 4,4-dicyclohexylmethane diisocyanate ($H_{12}MDI$), dimethylol propionic acid (DMPA)를 사용하여 epoxy를 함유한 수분산 폴리우레탄을 합성하였다. 또한 합성된 수분산 폴리우레탄의 물성은 DSC, UTM, adhesion test 등을 통해 평가하였다. 합성된 수분산 폴리우레탄의 Tg는 $-50^{\circ}C$ 부근에서 나타났으며, epoxy resin의 함량이 증가함에 따라 Tg도 상승하는 결과를 나타내었다. Epoxy resin의 함량이 증가함에 따라 인장강도는 증가하였고, 신율은 감소하였다. 또한 접착력 및 내가수분해 접착력은 polyol : epoxy = 99 : 1에서 최고값을 나타내었다.

• Elastomers and Composites
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• 제35권2호
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• pp.89-97
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• 2000

코팅(coating) 산업에서 유기 용제의 방출 감소를 유도하는 환경 규제에 부응하기 위하여 환경 친화적인 수용성 에폭시 수지가 개발되어 왔다. 각 개발 단계를 거칠 때마다 전 단계의 부족한 기술을 보완하기 위하여 새로운 수용성 에폭시 수지가 개발되어 왔다. 처음엔 수용성 에폭시 수지는 콘크리트 공사(masonry)에 주로 사용되었으며, 제2세대에는 콘크리트 공사뿐만 아니라 금속 표면을 보호하는 분야에도 이용되어져 왔다. 제3세대 수용성 에폭시 수지는 내식성(corrosion resistance)을 좋게 하고 휘발성유기물질(volatile organic compound)의 수준을 낮게 해주는 장점이 있어 고성능의 표면 코팅 프라이머(primers)를 제조하는데 이용되고 있다. 이 논문은 당사에서 최근에 개발한 수용성 에폭시 수지를 이용하여 에폭시 프라이머를 배합할 수 있는 중요한 가이드라인을 제시했다. 정확한 에폭시 수지-경화제 시스템을 확립하기 위하여 에폭시 수지와 경화제의 비율을 최적화하는데 중점을 두었다.

• 한국염색가공학회지
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• 제29권1호
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• pp.25-36
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• 2017

This study worked on the synthesis of waterborne polyurethane/epoxy hybrid resins containing aminosilane compound to replace conventional phenol resins used for a coating material for loudspeaker dampers, which are not harmful to human being. Waterborne polyurethane resins were synthesized from two diisocyanate of 4,4'-diphenylethane diisocyanate and toluene diisocyanate, two polyols of polyester polyols(PEP), polycarbonatediol(PCD), including and anionic center of dimethylol butanoic acid, a chain extenders of ethylenediamine(EDA), and a neutral agent of triethylamine. Synthesized polyurethane resins and commercially available bisphenol A type waterborne epoxy resin were blended in weight ratios of 80:20 to prepare polyurethane/epoxy hybrid resins. The synthesized waterborne polyurethane/epoxy hybrid resins were reacted with aminosilane compound to improve mechanical properties. Aminosilane-treated polyurethane /epoxy hybrid resins showed better mechanical properties.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 가을 학술논문 발표대회
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• pp.162-163
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• 2021

To prepare the waterborne silicone acrylic resin coatings, acrylic resin was prepared by a radical polymerization. Glass transition temperature(Tg) of the acrylic copolymer was fixed at 30℃ and the contents of tertiary amine monomer(DMAEMA), were varied to be 5, 10, 15 and 20 wt%, hydroxyl monomer, and carboxyl monomer were fixed 10 wt%, and 4 wt% respectively. γ-Glycidoxypropyltrimethoxysilane(GPTMS) containing epoxy group was used for curing agents. The eqivalent ratio of amine to epoxy was 1:1. The prepared coatings exhibited excellent adhesion to various substrates, and various physical properties of the coatings were satisfactory. The gloss retension and color difference were improved at low tertiary amine concentration. The coatings containing 10wt% tertiary amine concentration have especially good weather resistant properties.